The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 2000
Filed:
Feb. 12, 1999
Masaharu Mukouyama, Ibaraki, JP;
Satomi Komatsuzaki, Ibaraki, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
A process for producing crystalline L-aspartic acid is disclosed essentially consisting of the steps of preparing a mix solution containing fumaric acid, ammonia and an alkaline metal hydroxide, reacting the mix solution with aspartase to give a reaction solution containing L-aspartate and crystallizing L-aspartic acid out of the reaction solution, wherein a further amount of ammonia is added to the reaction solution containing L-aspartate and subsequently fumaric acid is added thereto to crystallize L-aspartic acid. The process can provide crystalline L-aspartic acid of high purity in a good workability without the need of any complicated steps.