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:
Apr. 07, 1998
Filed:
Nov. 09, 1995
Koji Tamura, Yokohama, JP;
Nitto Chemical Industry Co., Ltd., Tokyo, JP;
Abstract
A reaction system, wherein a cyanohydrin is converted into an optically active .alpha.-hydroxy acid or .alpha.-hydroxyamide via a treatment with a microorganism, is provided with an automatic cyanohydrin controller comprising a cyano ion detector, a regulator and a cyanohydrin supplier linked thereto. The reaction is performed while automatically controlling the cyanohydrin concentration. Thus cyanohydrin can be supplied under automatic control at a relatively low and constant concentration on the basis of its consumption ratio. The reaction rate of the catalyst can be continuously regarded as the rate-limiting factor. As a result, a decrease in the enzymatic activity during the reaction can be suppressed and an optically active .alpha.-hydroxy acid or .alpha.-hydroxyamide can be efficiently obtained at a high yield.