Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Noriko Ogawa0
Fumio Osakada0
Keiji Matsumoto0
Kenji Miyamoto0
Date of Patent
October 14, 2008
Patent Application Number
10527826
Date Filed
September 30, 2003
Patent Primary Examiner
Patent abstract
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.
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