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氨基磺酸用作皮革加脂剂的硫酸酯化剂 被引量:3
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作者 王学川 孙明 +1 位作者 杨国义 何清华 《皮革化工》 2004年第1期13-16,共4页
介绍了氨基磺酸 (H2 NSO3 H)的基本性质 ,并与三氧化硫 (SO3 )、氯磺酸 (ClSO3 H)、发烟硫酸 (H2 SO4.SO3 )等其它几种磺化剂进行了对比 ,氨基磺酸作为一种优良的磺化剂在皮革加脂剂的制备方面具有优势。
关键词 氨基磺酸 性质 硫酸酯化剂
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蓖麻油硫酸酯化新方法的研究 被引量:9
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作者 王学川 孙明 +1 位作者 何清华 宋威 《皮革科学与工程》 CAS 2003年第6期47-49,53,共4页
通过对各种磺化剂的性能对比,选定以氨基磺酸作为蓖麻油的硫酸酯化剂,经过探索性试验和正交优化,得出本反应的优选条件为:物料配比n(OH):n(H2NSO3H)为2:1;反应温度为105℃;反应时间为2.5h;催化剂用量为油质量的5%。该反应无"三废&q... 通过对各种磺化剂的性能对比,选定以氨基磺酸作为蓖麻油的硫酸酯化剂,经过探索性试验和正交优化,得出本反应的优选条件为:物料配比n(OH):n(H2NSO3H)为2:1;反应温度为105℃;反应时间为2.5h;催化剂用量为油质量的5%。该反应无"三废"产生,符合绿色化生产要求,是蓖麻油硫酸化的新途径,采用该方法试制出了性能优良的改性蓖麻油皮革加脂剂。 展开更多
关键词 氨基磺酸 蓖麻油 硫酸 皮革加脂 硫酸酯化剂
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Kinetics of Glucose Ethanolysis Catalyzed by Extremely Low Sulfuric Acid in Ethanol Medium 被引量:2
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作者 朱伟娜 常春 +1 位作者 马晨 杜风光 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第2期238-242,共5页
The kinetics for production of ethyl levulinate from glucose in ethanol medium was investigated. The experiments were performed in various temperatures (433-473 K) and initial glucose concentrations (0.056-0.168 mo... The kinetics for production of ethyl levulinate from glucose in ethanol medium was investigated. The experiments were performed in various temperatures (433-473 K) and initial glucose concentrations (0.056-0.168 mol·L-1) with extremely low sulfuric acid as the catalyst. The results show that higher temperature can improve the conversion of glucose to ethyl levulinate, with higher yield of ethyl levulinate (44.79%, by mole) obtained at 473 K for 210 min. The kinetics follows a simplified first-order kinetic model. For the main and side reactions, the values of activation energy are 122.64 and 70.97 kJ·mo1-1, and the reaction orders are 0.985 and 0.998, respectively. 展开更多
关键词 ethyl levulinate GLUCOSE KINETICS biomass
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CoFe_2O_4/CdS nanocomposite:Preparation,characterisation,and application in sonocatalytic degradation of organic dye pollutants 被引量:1
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作者 saeed farhadi firouzeh siadatnasab 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第9期1487-1495,共9页
A magnetic CoFe2O4/Cd S nanocomposite was prepared via one-step hydrothermal decomposition of cadmium diethanoldithiocarbamate complex on the surface of CoFe2O4 nanoparticles at a low temperature of 200 ℃.The nanocom... A magnetic CoFe2O4/Cd S nanocomposite was prepared via one-step hydrothermal decomposition of cadmium diethanoldithiocarbamate complex on the surface of CoFe2O4 nanoparticles at a low temperature of 200 ℃.The nanocomposite was characterised by X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy,energy-dispersive X-ray spectroscopy(EDX),UV-visible spectroscopy,transmission electron microscopy(TEM),N2 gas sorption analysis,X-ray photoelectron spectroscopy(XPS),and vibrating sample magnetometry.The FT-IR,XRD,EDX and XPS results confirmed the formation of the CoFe2O4/Cd S nanocomposite.Based on the TEM analysis,the CoFe2O4/Cd S nanocomposite constituted nearly uniform,sphere-like nanoparticles of ~20 nm in size.The optical absorption spectrum of the CoFe2O4/Cd S nanocomposite displayed a band gap of 2.21 e V,which made it a suitable candidate for application in sono/photocatalytic degradation of organic pollutants.Accordingly,the sonocatalytic activity of the CoFe2O4/Cd S nanocomposite was evaluated towards the H2O2-assisted degradation of methylene blue,rhodamine B,and methyl orange under ultrasonic irradiation.The nanocomposite displayed excellent sonocatalytic activity towards the degradation of all dyes examined—the dyes were completely decomposed within 5–9 min.Furthermore,a comparison study revealed that the CoFe2O4/Cd S nanocomposite is a more efficient sonocatalyst than pure Cd S;thus,adopting the nanocomposite approach is an excellent means to improve the sonoactivity of Cd S.Moreover,the magnetic properties displayed by the CoFe2O4/Cd S nanocomposite allow easy retrieval of the catalyst from the reaction mixture for subsequent uses. 展开更多
关键词 CoFe2O4/CdS nanocomposite Cadmium dithiocarbamate Hydrothermal decomposition Sonocatalyst Dye degradation
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Synthesis of ethoxycarbonyl isothiocyanate by orthogonal design
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作者 梁文杰 钟宏 何谋海 《Journal of Central South University》 SCIE EI CAS 2012年第9期2447-2450,共4页
Using Schiff base as a phase transfer catalyst, ethoxycarbonyl isothiocyanate was synthesized by reacting ethyl chloroformate with sodium thiocyanate. In order to get the best synthetic technology, an orthogonal test ... Using Schiff base as a phase transfer catalyst, ethoxycarbonyl isothiocyanate was synthesized by reacting ethyl chloroformate with sodium thiocyanate. In order to get the best synthetic technology, an orthogonal test (L9(34)) was applied. The results show that reaction temperature, reaction time, content of catalyst and molar ratio of sodium thiocyanate to ethyl chloroformate are the main factors influencing the yield. The four factors chosen for the present investigation are based on the results of a single-factor test. The optimum synthetic technology is determined as follows: reaction temperature 35 ℃, reaction time 3 h, the content of catalyst (molar fraction based on ethyl chloroformate) 1.5% and molar ratio of sodium thiocyanate to ethyl chloroformate 1.1. Under the optimized synthetic technology, the experimental yield reaches 96.8%. 展开更多
关键词 ethoxycarbonyl isothiocyanate Schiffbase phase transfer catalyst orthogonal test
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