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:
Jul. 04, 1989
Filed:
Nov. 18, 1985
Ashina Yoshiro, Kanagawa, JP;
Yasumasa Yamaguchi, Kanagawa, JP;
Masashi Nishida, Kanagawa, JP;
Toshiaki Doi, Kanagawa, JP;
Nitto Chemical Industry Co., Ltd., Tokyo, JP;
Abstract
A method for purifying a reaction solution obtained by using a microbial cell, an immobilized microbial cell, or an immobilized enzyme as a catalyst in a water medium is disclosed. The method comprises repeatedly filtering the reaction solution to remove fine solid matter using a polyethylene porous hollow fiber membrane having a bubble point of from 1 to 20 kg/cm.sup.2, and repeatedly washing the hollow fiber membrane before it has been clogged to such an extent that a differential pressure thereof exceeds 3 kg/cm.sup.2. By this method, a filter membrane can be repeatedly regenerated at high efficiency and can stably be used for a long period of time.