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《》 2004-03
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Optimization of the Processes of Separating and Purifying ω-Cyanoundecanoic Acid

LI Lin ( College of Chemistry and Chemical Engineering, Hunan Univ,Changsna Hunan 410082,China; Hunan University of Arts and Science, Changde Hunan 415000, China)  
ω - cyanoundecanoic acid(11 - CUA), which obtained from pyrolyzing 1,1- peroxydicyclohexylamine(FXA), can be separated and purified by extraction and crystallization treament. Comparative experiments of two different processes were carried out on the basis of taking the recovery yield and pureness of 11 - CUA and other indexes as the objective functions of these processes. The reasonable process were thereby defined.The reasonable process was as follow: ammonifying the solution of pyrolyzing PXA containing 11- CUA with ammonia gas or ammonia aqueous solution, washing impurities away by extraction, acidifying the solution of ammonium of 11- CUA to give crude free 11 - CUA, crystallizing crude 11 - CUA to yield pure 11 - CUA.The single factor experiments of some unit operations of the reasonable process were carried out to optimize the operation parameters of unit operations. Some important operation parameters were listed:pH value of the solution being ammonified was 8.0- 10.0,temperature 25- 35℃, stirring rate 120-240rpm,extraction solvent was toluene, reagent for acidifying ammonium of 11 -CUA was sulfuric acid or hydrochoric acid, and pH value of the solution being acidified 1.5-2.0, H2SO4 : NH3 was 1.2: 2.0(mol/ mol) , temperature 55 - 60℃, crystallixation solvent was cyclohexane, initil ratio of mass of crude 11 - CUA and cyclohexane 5. 00g/ 100.00g, dissolving temperature of crude 11 - CUA in crystallize was 20 minuted, crystallization temperature 10℃, reuse times of crystallization mother liquor was one times.
【CateGory Index】: O623.76
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【Co-citations】
Chinese Journal Full-text Database 5 Hits
1 Liu Minying, Zhao Qingxiang, Wang Yudong, Zhang Chenggui, Li Xiangkui (The College of Materials Engineering, Zhengzhou University 450052, China);SYNTHESIS,PROPERTY AND APPLICATION OF PETROLEUM FERMENTATION NYLON 1212[J];Engineering Plastics Application;2002-09
2 LI Lin,WANG Pin (Department of chemistry and chemical engineering,Hunan university of arts and science,Changde,Hunan,415000);Study on chemical oxidation method for refining 11-cyanoundecanoic acid[J];Journal of Hunan University of Arts and Science(Science and Technology);2008-01
3 Li Lin 1,3 ,Wu Ming 2 ,Xu Weijian 1 (1.Chemistry and Chemical Engineering College, Hunan University, Changsha 410082; 2.Technology and Development Center of Baling Company,SINOPEC,Yueyang 414007; 3.Department of Chemistry and Chemical Engineering,Hunan University of Arts and Science,Changde 41500,China);Study on the Crystallization Process of 11- Cyanoundecanoic Acid in Cyclohexane[J];Guangdong Chemical Industry;2005-04
4 Li Fumei(Technology Centre of BaLin Petrochemical Limited Liability Company,Yueyang 414014);Development and applications of long carbon chain nylon[J];New Chemical Materials;2006-12
5 LI Lin 1,3, HE Yi-yun 2 , WU Ming 2, ZHOU Shi-biao 3 , XU Wei-jian 1(1. Chemistry and Chemical Engineering College,Hunan University, Changsha 410082 China;2 .Technology and Development Center of Baling Company, SINOPEC, Yueyang ,414007,China;3. Hunan University of Arts and Science, Changde 415000,China);Synthesis of ω-Cyanoundecanoic Acid[J];Fine Chemical Intermediates;2004-05
【Co-references】
Chinese Journal Full-text Database 2 Hits
1 Li Lin 1,3 ,Wu Ming 2 ,Xu Weijian 1 (1.Chemistry and Chemical Engineering College, Hunan University, Changsha 410082; 2.Technology and Development Center of Baling Company,SINOPEC,Yueyang 414007; 3.Department of Chemistry and Chemical Engineering,Hunan University of Arts and Science,Changde 41500,China);Study on the Crystallization Process of 11- Cyanoundecanoic Acid in Cyclohexane[J];Guangdong Chemical Industry;2005-04
2 ZHANG Gang, WANG Jing kang, XIONG Hui (School of Chemical Engineering of Tianjin University, Tianjin 300072, China);Seeding Technology on the Precipitation Crystallization Process[J];Huaxue Shijie (Chemical World);2002-06
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