公开(公告)号：EP1550723A1

公开(公告)日：2005-07-06

申请号：EP03798554.6

申请日：2003-09-30

申请人： KANEKA CORPORATION

发明人： OGAWA, Noriko ,  MIYAMOTO, K., 101, Nikkanhaimu Dai 8 ,  OSAKADA, Fumio ,  MATSUMOTO, Keiji

IPC分类号： C12P7/62 ,  C08G63/90

CPC分类号： C08G63/90 ,  C08G63/06

摘要： The object of this invention is to provide a method for purifying PHA separated from PHA-containing microbial cells in high purity without incurring any serious decrease in molecular weight.
The present invention provides a method for purifying a 3-hydroxyalkanoic acid copolymer produced by a microorganism,
   which comprises treating an aqueous suspension containing the 3-hydroxyalkanoic acid copolymer separated from a microorganism with a hydrogen peroxide while controlling the pH of said aqueous suspension by adding an alkali either continuously or intermittently.

摘要翻译： 本发明的目的是提供一种从高纯度纯化含PHA微生物细胞分离PHA的方法，而不会导致分子量的严重下降。 本发明提供了一种纯化由微生物制备的3-羟基链烷酸共聚物的方法，该方法包括用含有过氧化氢的微生物分离的含有3-羟基链烷酸共聚物的含水悬浮液进行处理，同时控制所述 水悬浮液，通过连续或间歇地加入碱。