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. 18, 1995
Filed:
Nov. 17, 1993
Applicant:
Inventors:
Michael L Braden, Sugar Land, TX (US);
Robert A Marble, Sugar Land, TX (US);
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210708 ; 166267 ; 208188 ; 210727 ; 210730 ; 210712 ; 252338 ; 252358 ;
Abstract
A method and apparatus for recovering oil and clarifying waste water from an oil field are disclosed. The method includes the step of treating the waste water with an aqueous de-emulsifying agent comprising wattle tannin, an inorganic coagulant and a synthetic polymer flocculant to destabilize the oil emulsion and rapidly agglomerate the oil particles formed thereby. Efficiency of the present de-emulsifying agent permits use of flotation equipment for rapid clean-up of the waste water and obviates the need for large settling pits.