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Toluene Alkylation with Methanol to p-Xylene over Heteropoly Acids Supported by Clay 被引量:5
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作者 V.V.Bokade S.S.Deshpande +2 位作者 R.Patil S.Jain G.D.Yadav 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2007年第1期42-45,共4页
The alkylation of toluene with methanol for the selective formation of p-xylene was systematically studied. Very few studies have been reported on the use of superacids such as heteropolyacids on cheap supports, such ... The alkylation of toluene with methanol for the selective formation of p-xylene was systematically studied. Very few studies have been reported on the use of superacids such as heteropolyacids on cheap supports, such as clay. This article deals with the use of different heteropoly acids (HPAs), viz, Dodeca-Tungstophosphoric acid [H3PO4.12WO3.xH2O] (TPA), Dodeca-Molyhdo phosphoric acid ammonium salt hydrate [H12Mo12N3O40P+aq] (DMAA), Dodeca-Molyhdo Phosphoric acid (PMA) on clay (MontmoriUonite, K-10) and as such plain clay. This comparative study reveals that 20%PMA/Clay shows 62% toluene conversion and 100% selectivity toward p-xylene. 展开更多
关键词 TOLUENE METHANOL p-xylene heteropoly acid CLAY
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Toluene Alkylation to Selective Formation of p-Xylene over Co-Crystalline ZSM-12/ZSM-5 Catalyst 被引量:6
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作者 P.N.Joshi P.S.Niphadkar +2 位作者 P.A.Desai R.Patil V.V.Bokade 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2007年第1期37-41,共5页
The alkylation of toluene with methanol to selective formation of p-xylene has been systematically studied. ZSM-12 (MTW)/ZSM-5 co-crystalline zeolite in 40:60 proportions have been synthesized by the same molar gel... The alkylation of toluene with methanol to selective formation of p-xylene has been systematically studied. ZSM-12 (MTW)/ZSM-5 co-crystalline zeolite in 40:60 proportions have been synthesized by the same molar gel composition, but at different temperatures and periods than that of ZSM-12 and ZSM-5, separately. All the prepared samples are characterized by XRD, SEM, BET, and XRF. The activity of toluene alkylation was investigated with a mixture of toluene and methanol as a feed over the ZSM-12, ZSM-12/ZSM-5 co-crystalline, ZSM-5, and physical mixture of ZSM-12/ZSM-5. From characterization, it is observed that the ZSM-12/ZSM-5 co-crystalline material is different from that of ZSM-12, ZSM-5, and their physical mixture. Further, the ZSM-12/ZSM-5 co-crystalline zeolite produces the highest content of xylene and has better selectivity for p-xylene than ZSM-12, ZSM-5, and their physical mixture. 展开更多
关键词 ZSM-12 ZSM-5 co-crystalline toluene alkylation p-xylene
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Isobaric Vapor-Liquid Equilibrium of Binary Systems: p-Xylene + (Acetic Acid, Methyl Acetate and n-Propyl Acetate) and Methyl Acetate + n-Propyl Acetate in an Acetic Acid Dehydration Process 被引量:5
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作者 HUANG Xiuhui ZHONG Weimin PENG Changjun QIAN Feng 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2013年第2期171-176,共6页
The vapor-liquid equilibrium data of four binary systems (acetic acid +p-xylene, methyl acetate +n-propyl acetate, n-propyl acetate +p-xylene and methyl acetate +p-xylene) are measured at 101.33 kPa with Ellis equilib... The vapor-liquid equilibrium data of four binary systems (acetic acid +p-xylene, methyl acetate +n-propyl acetate, n-propyl acetate +p-xylene and methyl acetate +p-xylene) are measured at 101.33 kPa with Ellis equilibrium still, and then both the NRTL and UNIQUAC models are used in combination with the HOC model for correlating and estimating the vapor-liquid equilibrium of these four binary systems. The estimated binary VLE results using correlated parameters agree well with the measured data except the methyl acetate +p-xylene system which easily causes bumping and liquid rushing out of the sampling tap due to their dramatically different boiling points. The correlation results by NRTL and UNIQUAC models have little difference on the average absolute deviations of temperature and composition of vapor phase, and the results by NRTL model are slightly better than those by UNIQUAC model except for the methyl acetate +n-propyl acetate system, for which the latter gives more accurate correlations. 展开更多
关键词 vapor-liquid equilibrium p-xylene acetic acid methyl acetate n-propyl acetate parameter correlation
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Kinetics of Burning Side Reaction in the Liquid-phase Oxidation of p-Xylene 被引量:2
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作者 成有为 彭革 +1 位作者 王丽军 李希 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第2期181-188,共8页
During the liquid-phase oxidation of p-xylene,over-oxidation of reactant,intermediates and solvent to carbon dioxide and carbon monoxide is generally known as the burning side reaction.Batch and semi-continuous experi... During the liquid-phase oxidation of p-xylene,over-oxidation of reactant,intermediates and solvent to carbon dioxide and carbon monoxide is generally known as the burning side reaction.Batch and semi-continuous experiments were carried out,and the experimental data of the burning side reaction were analyzed and reported in this paper.The results showed that the rates of burning side reactions were proportional to the rates of the main reaction,but decreased with the increasing concentrations of reactant and intermediates.The inter-stimulative and competitive relationship between the burning side reaction and the main reaction was confirmed,and the rates of the burning side reaction could be described with some key indexes of the main reaction.According to the mechanism of the side reactions and the kinetics model of main reaction which were proposed and tested in the previous papers,a kinetic model of the burning side reactions involving some key indexes of the main reaction was developed,and the parameters were determined by data fitting of the COx rate curves.The obtained kinetic model could describe the burning side reactions adequately. 展开更多
关键词 KINETICS burning side reaction p-xylene oxidation
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Highly Efficient Adsorption of P-Xylene from Aqueous Solutions by Hierarchical Nanoporous Biochar Derived from Crab Shell 被引量:2
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作者 Yingna Chen Hailong Zhang +5 位作者 Jian Guo Lu Cai Yaning Wang Xinxin Yao Wendong Song Lili Ji 《Journal of Renewable Materials》 SCIE EI 2021年第10期1741-1755,共15页
The global consumption of p-xylene(PX)for the production of polymers has raised serious concerns about its impact on the environment.As various reports have shown the risks that PX could pose to human health,research ... The global consumption of p-xylene(PX)for the production of polymers has raised serious concerns about its impact on the environment.As various reports have shown the risks that PX could pose to human health,research into cost-effective remedial methods to remove PX from the environment has gained attraction.In this work,a hierarchical porous crab shell biochar(KCS)was synthesized,characterized,and evaluated for its efficiency to remove PX from aqueous solution.The characterizations of KCS,including the porous structure,surface functional group,phase structure,and surface morphology,were discussed by N_(2) adsorption-desorption,FTIR,XRD,and SEM.Batch adsorption experiments showed that the maximum adsorption capacity of PX on KCS was 393 mg/g within 5 min,larger than most biological/biomass materials,mainly due to the higher specific surface area of 2046 m^(2)/g,and abundant lipophilic functional groups.Subsequent adsorption kinetics study indicated a pseudo-second-order model which implied that the adsorption of PX was due to chemisorption.Thermodynamic parameters showed that the values ofΔH°andΔG°were both negative,indicating that the PX adsorption process on KCS was spontaneous and exothermic.The performance of KCS in delivering a cost-effective,fast,and efficient solution for the removal of PX from aqueous solution would greatly benefit current environmental remediation efforts. 展开更多
关键词 Crab shell porous biochar p-xylene ADSORPTION wastewater
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Viscosities of Pure Water, Acetic Acid + Water, and p-Xylene + Acetic Acid + Water at Different Temperature and Pressure 被引量:1
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作者 乔燕 邸志国 +2 位作者 马友光 马沛生 夏淑倩 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第3期446-454,共9页
The viscosities of pure water,the acetic acid+water binary system,and the p-xylene+acetic acid+ water ternary system at different concentrations were determined with a rolling-ball viscometer at temperatures from 313.... The viscosities of pure water,the acetic acid+water binary system,and the p-xylene+acetic acid+ water ternary system at different concentrations were determined with a rolling-ball viscometer at temperatures from 313.15 to 473.15 K and pressures from 0.10 to 3.20 MPa.The viscosity data were fitted by a correlation equation for the estimation of the mixture viscosities.The average absolute deviations(AAD)of the correlation for binary and ternary systems are 2.48%and 1.77%,respectively. 展开更多
关键词 VISCOSITY rolling-ball method acetic acid p-xylene
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Modified Self-adaptive Immune Genetic Algorithm for Optimization of Combustion Side Reaction of p-Xylene Oxidation 被引量:1
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作者 陶莉莉 孔祥东 +1 位作者 钟伟民 钱锋 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第6期1047-1052,共6页
In recent years, immune genetic algorithm (IGA) is gaining popularity for finding the optimal solution for non-linear optimization problems in many engineering applications. However, IGA with deterministic mutation fa... In recent years, immune genetic algorithm (IGA) is gaining popularity for finding the optimal solution for non-linear optimization problems in many engineering applications. However, IGA with deterministic mutation factor suffers from the problem of premature convergence. In this study, a modified self-adaptive immune genetic algorithm (MSIGA) with two memory bases, in which immune concepts are applied to determine the mutation parameters, is proposed to improve the searching ability of the algorithm and maintain population diversity. Performance comparisons with other well-known population-based iterative algorithms show that the proposed method converges quickly to the global optimum and overcomes premature problem. This algorithm is applied to optimize a feed forward neural network to measure the content of products in the combustion side reaction of p-xylene oxidation, and satisfactory results are obtained. 展开更多
关键词 self-adaptive immune genetic algorithm artificial neural network measurement p-xylene oxidation process
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Renewable p-Xylene Production by Co-catalytic Pyrolysis of Cellulose and Methanol 被引量:1
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作者 Chi Tang Li-juan Zhu +1 位作者 Ming-hui Fan Quan-xin Li 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2018年第6期843-850,734,共9页
This work developed a one-step process for renewable p-xylene production by co-catalytic fast pyrolysis (co-CFP) of cellulose and methanol over the different metal oxides modified ZSM5 catalysts. It has been proven th... This work developed a one-step process for renewable p-xylene production by co-catalytic fast pyrolysis (co-CFP) of cellulose and methanol over the different metal oxides modified ZSM5 catalysts. It has been proven that La2O3-modified ZSM5(80) catalyst was an effective one for the production of biobased p-xylene. The selectivity and yield of p-xylene strongly depended on the acidity of the catalysts, reaction temperature, and methanol content. The highest p-xylene yield of 14.5 C-mol% with a p-xylene/xylenes ratio of 86.8% was obtained by the co-CFP of cellulose with 33wt% methanol over 20%La2O3-ZSM5(80) catalyst. The deactivation of the catalysts during the catalytic pyrolysis process was investigated in detail.The reaction pathway for the formation of p-xylene from cellulose was proposed based on the analysis of products and the characterization of catalysts. 展开更多
关键词 CELLULOSE p-xylene Catalytic fast pyrolysis La2O3-modified ZSM5
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Multi-objective optimization of p-xylene oxidation process using an improved self-adaptive differential evolution algorithm 被引量:1
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作者 Lili Tao Bin Xu +1 位作者 Zhihua Hu Weimin Zhong 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第8期983-991,共9页
The rise in the use of global polyester fiber contributed to strong demand of the Terephthalic acid (TPA). The liquid-phase catalytic oxidation of p-xylene (PX) to TPA is regarded as a critical and efficient chemi... The rise in the use of global polyester fiber contributed to strong demand of the Terephthalic acid (TPA). The liquid-phase catalytic oxidation of p-xylene (PX) to TPA is regarded as a critical and efficient chemical process in industry [ 1 ]. PX oxidation reaction involves many complex side reactions, among which acetic acid combustion and PX combustion are the most important. As the target product of this oxidation process, the quality and yield of TPA are of great concern. However, the improvement of the qualified product yield can bring about the high energy consumption, which means that the economic objectives of this process cannot be achieved simulta- neously because the two objectives are in conflict with each other. In this paper, an improved self-adaptive multi-objective differential evolution algorithm was proposed to handle the multi-objective optimization prob- lems. The immune concept is introduced to the self-adaptive multi-objective differential evolution algorithm (SADE) to strengthen the local search ability and optimization accuracy. The proposed algorithm is successfully tested on several benchmark test problems, and the performance measures such as convergence and divergence metrics are calculated. Subsequently, the multi-objective optimization of an industrial PX oxidation process is carried out using the proposed immune self-adaptive multi-objective differential evolution algorithm (ISADE). Optimization results indicate that application oflSADE can greatly improve the yield of TPA with low combustion loss without degenerating TA quality. 展开更多
关键词 p-xylene oxidation Operation condition optimization Multi-objective optimization Self-adaptive differential evolution
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High dimension feature extraction based visualized SOM fault diagnosis method and its application in p-xylene oxidation process 被引量:1
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作者 田颖 杜文莉 钱锋 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第9期1509-1517,共9页
Purified terephthalic acid(PTA) is an important chemical raw material. P-xylene(PX) is transformed to terephthalic acid(TA) through oxidation process and TA is refined to produce PTA. The PX oxidation reaction is a co... Purified terephthalic acid(PTA) is an important chemical raw material. P-xylene(PX) is transformed to terephthalic acid(TA) through oxidation process and TA is refined to produce PTA. The PX oxidation reaction is a complex process involving three-phase reaction of gas, liquid and solid. To monitor the process and to improve the product quality, as well as to visualize the fault type clearly, a fault diagnosis method based on selforganizing map(SOM) and high dimensional feature extraction method, local tangent space alignment(LTSA),is proposed. In this method, LTSA can reduce the dimension and keep the topology information simultaneously,and SOM distinguishes various states on the output map. Monitoring results of PX oxidation reaction process indicate that the LTSA–SOM can well detect and visualize the fault type. 展开更多
关键词 Self-organizing map Local tangent space alignment Fault diagnosis Visualization p-xylene oxidation
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VAPOR-LIQUID EQUILIBRIUM FOR TERNARY MIXTURES OF BENZENE,TOLUENE,AND p-XYLENE
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作者 金彰礼 胡爱宝 刘昆元 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 1993年第1期49-53,共5页
Vapor-liquid equilibrium composition and temperature were measured for binary andternary mixtures of benzene,toluene and p-xylene at 101.33 kPa The equilibrium cell of Boubliketal.was modified for the present study.Th... Vapor-liquid equilibrium composition and temperature were measured for binary andternary mixtures of benzene,toluene and p-xylene at 101.33 kPa The equilibrium cell of Boubliketal.was modified for the present study.The experimental vapor-liquid equilibrium data were corre-lated with the Wilson equation. 展开更多
关键词 BENZENE TOLUENE and p-xylene system VAPOR-LIQUID EQUILIBRIUM EQUILIBRIUM CELL
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Density and Excess Molar Volume of Binary Mixtures ofp-Xylene+Acetic Acid and o-Xylene+Acetic Acid at Different Temperatures and Pressures
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作者 杨天宇 夏淑倩 +1 位作者 邸志国 马沛生 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第2期247-255,共9页
A new apparatus was designed with a thick-walled glass capillary, electric heater tube with red copper and heat preservation. The thick-walled glass capillary was used for its advantages of resistance to acid corrosio... A new apparatus was designed with a thick-walled glass capillary, electric heater tube with red copper and heat preservation. The thick-walled glass capillary was used for its advantages of resistance to acid corrosion and pressure, and ease of observation. The experimental densities over the entire range of mole fraction for the binary mixture of p-xylene+acetic acid and o-xylene+acetic acid were measured using the new apparatus at temperatures ranging from 313.15K to 473.15K and pressure ranging from 0.20 to 2,0 MPa. The density values were used in the determination of excess molar volumes, W. The Redlich-Kister equation was used to fit the excess molar volume values, and the coefficients and estimate ot the standard error values were presented. The experimental resuits prove that the density measurement apparatus is successful. 展开更多
关键词 DENSITY excess molar volume p-xylene O-XYLENE acetic acid
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Excess Molar Volumes and Viscosities of Binary Mixtures of p-Xylene with Cyclohexane, n-Heptane, n-Octane, Sulfolane, N-Methyl-2-pyrrolidone and Acetic Acid at 303.15 K and 323.15 K and Atmospheric Pressure
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作者 杨长生 马沛生 周清 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第5期700-706,共7页
Experimental data on density and viscosity at 303.15K and 323.15K are presented for the binary mixtures of p-xylene with cyclohexane, n-heptane, n-octane, sulfolane, N-methyl-2-pyrrolidone and acetic acid.From these d... Experimental data on density and viscosity at 303.15K and 323.15K are presented for the binary mixtures of p-xylene with cyclohexane, n-heptane, n-octane, sulfolane, N-methyl-2-pyrrolidone and acetic acid.From these data, the excess molar volume and deviations in viscosity have been calculated. The computed quantities have been fitted to the Redlich-Kister Equation to derive coefficients and estimate the standard error values. Results are discussed in terms of intermolecular interactions. 展开更多
关键词 density viscosity p-xylene alkane SULFOLANE N-METHYL-2-PYRROLIDONE
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Effect of CO2 on oxidation of p-xylene in acetic acids/CO2
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作者 HUANG Kan CHEN Jie ZHAO Ling 《Journal of Chemistry and Chemical Engineering》 2009年第4期44-47,共4页
The oxidation of p-xylene to terephthalic acid with molecular oxygen in acetic acids modified carbon dioxide over Co/Mn/Br catalyst was studied in a batch reactor. The results showed that the oxidation of p-xylene to ... The oxidation of p-xylene to terephthalic acid with molecular oxygen in acetic acids modified carbon dioxide over Co/Mn/Br catalyst was studied in a batch reactor. The results showed that the oxidation of p-xylene to terephthalic acid was severely inhibited when carbon dioxide exceeded a certain amount, the conversion of p-xylene decreased rapidly from 100.0% to 3.3% and the yield of terephthalic acid dropped from 42.6% to trace. Whereas the oxidation processes of p-Tolualdchyde to p-Toluic acid and 4-Carboxybenzaldehyde to tcrcphthalic acid were improved when a relative small amount of CO2 v/as added, Further investigation found that this negative effect may be caused by multiphase reactions emerging. 展开更多
关键词 catalytic oxidation p-xylene acetic acid carbon dioxide negative effect
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Design and control of a p-xylene oxidation process
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作者 陶莉莉 胡志华 钱锋 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第12期1935-1944,共10页
The p-xylene(PX) oxidation process is of great industrial importance because of the strong demand of the global polyester fiber.A steady-state model of the PX oxidation has been studied by many researchers.In our prev... The p-xylene(PX) oxidation process is of great industrial importance because of the strong demand of the global polyester fiber.A steady-state model of the PX oxidation has been studied by many researchers.In our previous work,a novel industrial p-xylene oxidation reactor model using the free radical mechanism based kinetics has been developed.However,the disturbances such as production rate change,feed composition variability and reactor temperature changes widely exist in the industry process.In this paper,dynamic simulation of the PX oxidation reactor was designed by Aspen Dynamics and used to develop an effective plantwide control structure,which was capable of effectively handling the disturbances in the load and the temperature of the reactor.Step responses of the control structure to the disturbances were shown and served as the foundation of the smooth operation and advanced control strategy of this process in our future work. 展开更多
关键词 p-xylene oxidation Dynamic simulation Aspen Dynamics Process design and control
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硅磷镁改性对纳米HZSM-5催化苯和甲醇烷基化反应的影响 被引量:20
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作者 赵博 刘民 +2 位作者 谭伟 吴宏宇 郭新闻 《石油学报(石油加工)》 EI CAS CSCD 北大核心 2013年第4期605-611,共7页
采用等体积浸渍法对纳米HZSM-5催化剂进行Si、P、Mg改性,通过X射线衍射、SEM、NH3程序升温脱附、吸附吡啶红外光谱和热重差热分析等方法对改性前后的催化剂进行了表征。在固定床反应器上通过苯和甲醇烷基化反应考察催化剂的活性和稳定... 采用等体积浸渍法对纳米HZSM-5催化剂进行Si、P、Mg改性,通过X射线衍射、SEM、NH3程序升温脱附、吸附吡啶红外光谱和热重差热分析等方法对改性前后的催化剂进行了表征。在固定床反应器上通过苯和甲醇烷基化反应考察催化剂的活性和稳定性。结果表明,采用Si、P、Mg改性的纳米HZSM-5催化剂,苯与甲醇烷基化反应产物中对二甲苯的选择性明显提高,就(6%SiO2+5%P2O5+3.5%MgO)/纳米HZSM-5催化剂而言,对二甲苯选择性达到70%;反应尾气中乙烯和丙烯的含量较高,甲醇含量增加。由于改性后催化剂的孔道窄化,稳定性较HZSM-5降低,水蒸气的存在可以提高催化剂稳定性。 展开更多
关键词 硅磷镁改性 甲醇 烷基化 ZSM-5 选择性 对二甲苯
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用介观动力学模拟Pluronic L64/水/p—Xylene体系的相分离 被引量:4
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作者 郭森立 侯廷军 徐筱杰 《化学学报》 SCIE CAS CSCD 北大核心 2001年第12期2093-2098,共6页
用介观动力学在介观层次上对不同组分的Pluronic L64/水/p-xylene三元体系的相分离进行了研究,得到了和实验相吻合的结果.计算表明对于纯p-xylene溶剂和有含少量水的p-xylene溶剂,体系没有发生相分离,随着水的含量增加,体系发生了明显... 用介观动力学在介观层次上对不同组分的Pluronic L64/水/p-xylene三元体系的相分离进行了研究,得到了和实验相吻合的结果.计算表明对于纯p-xylene溶剂和有含少量水的p-xylene溶剂,体系没有发生相分离,随着水的含量增加,体系发生了明显的相分离,产生了不同形态的胶团.本研究还通过对比不同溶剂组分下的体系介观形貌,讨论了水在体系相分离中的作用.同时通过分析模拟了1 000步后体系中水的分布,证实在胶团核中存在自由水(free water)的猜想. 展开更多
关键词 PLURONIC L64 相分离 介观动力学 密度泛函 高斯链 相互作用参数 溶液属性 非离子型表面活性剂 p-xylene 三元体系
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Adaptive Soft-sensor Modeling Algorithm Based on FCMISVM and Its Application in PX Adsorption Separation Process 被引量:10
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作者 傅永峰 苏宏业 +1 位作者 张英 褚健 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第5期746-751,共6页
To overcome the problem that soft sensor models cannot be updated with the process changes, a soft sensor modeling algorithm based on hybrid fuzzy c-means (FCM) algorithm and incremental support vector machines (I... To overcome the problem that soft sensor models cannot be updated with the process changes, a soft sensor modeling algorithm based on hybrid fuzzy c-means (FCM) algorithm and incremental support vector machines (ISVM) is proposed. This hybrid algorithm FCMISVM includes three parts: samples clustering based on FCM algorithm, learning algorithm based on ISVM, and heuristic sample displacement method. In the training process, the training samples are first clustered by the FCM algorithm, and then by training each clustering with the SVM algorithm, a sub-model is built to each clustering. In the predicting process, when an incremental sample that represents new operation information is introduced in the model, the fuzzy membership function of the sample to each clustering is first computed by the FCM algorithm. Then, a corresponding SVM sub-model of the clustering with the largest fuzzy membership function is used to predict and perform incremental learning so the model can be updated on-line. An old sample chosen by heuristic sample displacement method is then discarded from the sub-model to control the size of the working set. The proposed method is applied to predict the p-xylene (PX) purity in the adsorption separation process. Simulation results indicate that the proposed method actually increases the model's adaptive abilities to various operation conditions and improves its generalization capability. 展开更多
关键词 soft sensor fuzzy c-means incremental support vector machines heuristic sample displacement method p-xylene purity
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Dioxygen Affinities and Catalytic Oxidation Performance of Cobalt (Ⅱ)Complexes with N—Aryl Hydroxamic Acid 被引量:4
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作者 Chun Chun ZHANG Wei ZENG +1 位作者 Jian Zhang LI Sheng Ying QIN 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第6期627-630,共4页
The oxygenation of cobalt (II) hydroxamates (CoL2) and its catalytic performance in oxidation of p-xylene to p-toluic acid (PTA) were examined. The effects of X and Y bonded to hydroxamate group on dioxygen affinitie... The oxygenation of cobalt (II) hydroxamates (CoL2) and its catalytic performance in oxidation of p-xylene to p-toluic acid (PTA) were examined. The effects of X and Y bonded to hydroxamate group on dioxygen affinities and catalytic oxidation performance were also investigated. 展开更多
关键词 Cobalt (II) hydroxamates dioxygen affinities catalytic oxidation p-xylene.
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Facile synthesis of hypercrosslinked resin via photochlorination of p-xylene and succedent alkylation polymerization 被引量:2
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作者 Ling Ling Bai Yong Hao Zhou Xiu Li Wang Si Guo Yuan Xian Li Wu 《Chinese Chemical Letters》 SCIE CAS CSCD 2011年第9期1115-1118,共4页
A combination of photochlorination ofp-xylene and succedent Friedel-Crafts alkylation polymerization was firstly used in the preparation of the hypercrosslinked adsorptive resin. The data of GC-MS and GC showed that a... A combination of photochlorination ofp-xylene and succedent Friedel-Crafts alkylation polymerization was firstly used in the preparation of the hypercrosslinked adsorptive resin. The data of GC-MS and GC showed that a series of chlorizates were produced when p-xylene was photochlorinated. Hypercrosslinked resins could be synthesized by copolymerization, self-polymerization of chlorizates or post crosslinking reaction. The chemical structure and micromorphology of the porous resins were characterized by BET, FF-IR, SEM and elementary analysis (EA). The results showed that the novel adsorptive resins possess high BET surface near to 1038 m^2/g and large pore volumes range from 0.5 to 1.2 cm^3/g. 展开更多
关键词 Hypercrosslinked resin SYNTHESIS p-xylene PHOTOCHLORINATION POLYMERIZATION
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