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:
Feb. 06, 2001
Filed:
Apr. 02, 1998
Applicant:
Inventors:
William G. Kozak, Hatfield, PA (US);
Daniel J. Riley, Cedartown, GA (US);
Assignee:
Geo Specialty Chemicals, Inc., Cleveland, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F 1/44 ; C07C / ;
U.S. Cl.
CPC ...
C02F 1/44 ; C07C / ;
Abstract
A process for producing a low sulfate organic sulfonate/sulfate aqueous solution from a soluble sulfate containing organic sulfonate/sulfate which comprises forming an aqueous solution of organic sulfonate/sulfate; and passing the aqueous solution of the organic sulfonate/sulfate containing the soluble sulfate over a nanofiltration zone at an elevated pressure to form a retentate with a reduced sulfate content and a permeate containing the soluble sulfate and organic material.