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Amberlite IR-120:一种可重复利用的微波辅助条件下胺类化合物与甲酸N-甲酰化反应的催化剂(英文) 被引量:3
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作者 Madhusudana Reddy MVTHUKUR BHOJEGOWDSHA Aatika NIZAMSHA Mohamed Afzal PASHA 《催化学报》 SCIE EI CAS CSCD 北大核心 2010年第5期518-520,共3页
A rapid and practical green route for the N-formylation of amines with formic acid using Amberlite IR-120 as a catalyst is described.This method provides an efficient and much improved modification over the reported m... A rapid and practical green route for the N-formylation of amines with formic acid using Amberlite IR-120 as a catalyst is described.This method provides an efficient and much improved modification over the reported methods in terms of yield,reaction time,and work-up procedure.A wide variety of substituents is tolerated,which is not the case for existing procedures. 展开更多
关键词 N-FORMYLATION amberlite ir-120 蚁的酸 微波
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Studies of Uni-Univalent Ion Exchange Reactions Using Strongly Acidic Cation Exchange Resin Amberlite IR-120
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作者 Pravin Singare Ram Lokhande Neelima Samant 《Natural Science》 2009年第2期124-128,共5页
The selectivity behaviour of ion exchange resin Amberlite IR-120 for inorganic cations like sodium and potassium was predicted on the basis of thermodynamic data. The equilibrium constant K values calculated for uni-u... The selectivity behaviour of ion exchange resin Amberlite IR-120 for inorganic cations like sodium and potassium was predicted on the basis of thermodynamic data. The equilibrium constant K values calculated for uni-univalent ion exchange reaction systems were observed to increase with rise in temperature, indicating endothermic ion exchange reactions. From the K values calculated at different temperatures the enthalpy values were calculated. The low enthalpy and higher K values for K+ ion ex-change reaction indicates more affinity of the resin for potassium ions as compared to that for sodium ions also in the solution. The technique used in the present experimental work will be useful in understanding the selectivity behav-iour of different ion exchange resins for ions in the solution. Although the ionic selectivity data for the ion exchange resins is readily available in the literature, it is expected that the informa-tion obtained from the actual experimental trials will be more helpful. The technique used in the present experimental work when applied to dif-ferent ion exchange resins will help in there characterization. 展开更多
关键词 Ion Exchange EQUILIBRIUM EQUILIBRIUM Constant ENTHALPY ENDOTHERMIC Reaction amberlite ir-120
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Removal of Chromium(III) from the Waste Solution of an Indian Tannery by Amberlite IR 120 Resin
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作者 Pratima Meshram Sushanta Kumar Sahu +2 位作者 Banshi Dhar Pandey Vinay Kumar Tilak Raj Mankhand 《International Journal of Nonferrous Metallurgy》 2012年第3期32-41,共10页
The extraction of chromium(III) from a model waste solution and also from a waste solution of an Indian tannery with Amberlite IR 120 resin is described, and the performance of this resin is compared with other simila... The extraction of chromium(III) from a model waste solution and also from a waste solution of an Indian tannery with Amberlite IR 120 resin is described, and the performance of this resin is compared with other similar resins. The parameters that were optimized include effect of mixing time, pH, loading and elution behaviours of chromium(III) for this resin. Sorption of chromium(III) on Amberlite IR 120 followed Freundlich isotherm and Langmuir isotherm model, and the maximum sorption capacity was determined to be 142.86 mg Cr(III)/g of the resin. Higher Freundlich constant (Kf) values (6.30 and 13.46 for aqueous feed of 500 and 1000 ppm Cr(III)) indicated strong chemical interaction through ion exchange mechanism of the metal ion with the resin. The kinetic data showed good fit to the Lagergren first order model for extraction of chromium(III). Desorption of chromium(III) from the loaded resin increased with the increase in concentration of eluent (5-20% H2SO4). With 20% (v/v) sulphuric acid solution 94% chromium(III) was eluted in three stages. Elution of the Cr(III) in the column experiments was however, found to be lower (82%) than that of the shake flask data. In case of Indian tannery’s waste solution, it was observed that almost total chromium was extracted in four stages with Amberlite IR 120. 展开更多
关键词 Chromium(III) Ion exchange amberlite IR 120 TANNERY WASTE SOLUTION
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Performance Evaluation of the Fe-IR-120(Na)-DEHPA Impregnated Resin in the Removal Process of As(V) from Aqueous Solution
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作者 Mihaela Ciopec Adina Negrea +3 位作者 Lavinia Lupa Comeliu Davidescu Petru Negrea Paula Sfarloaga 《材料科学与工程(中英文B版)》 2011年第4期421-432,共12页
关键词 DEHPA 浸渍树脂 水溶液 LANGMUIR模型 IR NA 搬运过程 绩效评价
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离子交换树脂催化合成马来酸二丁酯动力学研究 被引量:1
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作者 易正虎 蒋文伟 +4 位作者 李晶晶 毛维 姚佩 李鹏翔 杨德华 《化学工程》 CAS CSCD 北大核心 2020年第7期62-67,72,共7页
为了给DBM(马来酸二丁酯)合成工艺以及二元酯化理论提供参考依据,文中以Amberlite IR-120阳离子交换树脂作为催化剂,采用顺丁烯二酸酐和正丁醇酯化制备了DBM,并推导出该反应的拟均相反应动力学模型(PH模型)、Langmuir-Hinshelwood模型(L... 为了给DBM(马来酸二丁酯)合成工艺以及二元酯化理论提供参考依据,文中以Amberlite IR-120阳离子交换树脂作为催化剂,采用顺丁烯二酸酐和正丁醇酯化制备了DBM,并推导出该反应的拟均相反应动力学模型(PH模型)、Langmuir-Hinshelwood模型(LHHW模型)和Eley-Rideal模型(ER模型),并与实验数据进行了拟合。研究结果表明,最佳反应条件为醇酐摩尔比为4:1、温度120℃、催化剂质量分数为7.5%(相对反应体系的总质量),酯化率最大可达96%,且对产品样品进行FT-IR分析,结果表明符合DBM的结构。由MATLAB软件分析结果表明,只有正丁醇吸附在催化剂表面的Eley-Ridel模型与实验数据拟合较好,即为顺酐与正丁醇酯化反应的动力学模型。 展开更多
关键词 amberlite ir-120 马来酸二丁酯 酯化率 动力学模型
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离子交换树脂预浓缩法测定环境水中的Cd(Ⅱ) 被引量:1
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作者 周湘平 杨慧莲 吴逸渠 《广州化学》 CAS 2019年第5期36-41,共6页
使用Amberlite CG-120离子交换树脂作为固相萃取剂,预浓缩环境水样中的Cd(Ⅱ),然后用火焰原子吸收分光光度计法(FAAS)测定洗脱液中Cd(Ⅱ)的含量从而确定水样中的Cd(Ⅱ)浓度。实验优化了洗脱液的pH、种类及其浓度、样品和洗脱液流速、吸... 使用Amberlite CG-120离子交换树脂作为固相萃取剂,预浓缩环境水样中的Cd(Ⅱ),然后用火焰原子吸收分光光度计法(FAAS)测定洗脱液中Cd(Ⅱ)的含量从而确定水样中的Cd(Ⅱ)浓度。实验优化了洗脱液的pH、种类及其浓度、样品和洗脱液流速、吸附剂用量等实验参数,并研究了其他阳离子对Cd(Ⅱ)回收率的干扰效应,获得了最佳的分析灵敏度、准确度、精密度以及回收率。方法检出限为0.1μg/L,线性范围为0.4μg/L^80μg/L。采用该分析方法对自来水、河水、地下水、海水进行加标回收实验,回收率均在95%以上。 展开更多
关键词 amberlite CG-120树脂 环境水样品 Cd(Ⅱ) 固相萃取
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