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:
Oct. 28, 1997
Filed:
Jun. 07, 1995
Applicant:
Inventor:
Fudu Miao, Louisville, CO (US);
Assignee:
Chronopol, Inc., Golden, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12P / ;
U.S. Cl.
CPC ...
435136 ; 204519 ; 204522 ; 204527 ; 204530 ; 204536 ; 204538 ; 204534 ; 204537 ; 210630 ; 210637 ; 210638 ; 210641 ; 210651 ; 210654 ; 210259 ; 435137 ; 435139 ; 435144 ; 435145 ; 435140 ; 435800 ; 562486 ; 562580 ; 562589 ; 562593 ;
Abstract
The present invention relates to methods and apparatus for reducing the fouling of ion-selective membranes used in the electrodialytic purification of organic acids. More particularly, the present invention relates to the use of nanofiltration and chelating agents for removal of impurities from an organic acid-containing feed material to reduce the fouling of ion-selective membranes used in electrodialysis.