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邻二甲苯- 4- 磺酸从猪血粉水解液中沉淀
提取L-亮氨酸的工艺

翁连进,杨 欣,甘林火,韩媛媛,王士斌   

  1. 华侨大学化工与制药工程系;泉州市泉港南元化工有限公司
  • 出版日期:2006-04-25 发布日期:2006-04-25

Separation of L-leucine from pig blood hydrolysate using precipitation
method by reacting with 3,4-dimethyl-benzenesulfonic acid

WENG Lianjin,YANG Xin,GAN Linhuo,HAN Yuanyuan,WANG Shibin   

  1. Department of Chemical and Pharmaceutical Engineering, Huaqiao University;Quangang Nanyuan Chemical Co. Ltd.
  • Online:2006-04-25 Published:2006-04-25

摘要: 考察了pH值、邻二甲苯–4–磺酸与L–亮氨酸的物质的量比、氯化铵浓度和温度等因素对邻二甲苯–4–磺酸反应沉淀L–亮氨酸的影响。结果表明:邻二甲苯–4–磺酸沉淀L-亮氨酸的适宜pH值为不高于1.5;邻二甲苯–4–磺酸与L-亮氨酸的最适物质的量比为3∶1;溶液中氯化铵浓度增大使L–亮氨酸的沉淀率缓慢下降;温度升高L–亮氨酸的沉淀率迅速降低,反应应于低温下进行,实际生产中可选择在0 ℃。按上述最佳工艺条件从除酸后猪血粉水解液中提取L–亮氨酸,沉淀率达到90.62%,经精制L-亮氨酸产品达到《中华人民共和国药典》(2000年版二部)的标准。

Abstract: The effects of pH, temperature, mol ratio of 3,4-dimethyl-benzenesulfonic acid to L-leucine and NH4Cl concentration on the L-leucine precipitation yield by reacting with 3,4-dimethyl-benzenesulfonic acid were investigated. The pH value must be kept lower than 1.5, the optimal mol ratio of 3,4–dimethyl-benzenesulfonic acid to L-leucine was 3∶1. A low temperature was favorable for precipitation, preferably 0C.The yield decreased with the increase of NH4Cl concentration. L-leucine was separated from pig blood hydrolysate after removal of acid, and the precipitation rate was 90.62%. The L-leucine after refinement was in agreement with the standard of Pharmacopoeia of the People’s Republic of China (2000 edition, the second section)。

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