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. 06, 1990
Filed:
Mar. 17, 1989
Applicant:
Inventor:
William K Stephenson, Sugar Land, TX (US);
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
252358 ; 252332 ; 252342 ; 252344 ; 252341 ;
Abstract
A demulsifier comprising: a vinyl polymer having a site capable of being alkoxylated; and at least one alkylene oxide selected from the group consisting of: ethylene oxide, propylene oxide, butylene oxide, and the like. For example, ethylene oxide may be present in an amount of about 1 to 40 weight percent, and/or propylene oxide may be present in an amount of about 1 to 40 weight percent. The vinyl polymer contains at least one hydrophobic monomer and at least one hydrophilic monomer, wherein the hydrophobic monomer and/or the hydrophilic monomer contain sites which are capable of being alkoxylated.