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. 13, 1979
Filed:
Dec. 12, 1977
Applicant:
Inventors:
Audrone M Pavilcius, Chicago, IL (US);
William H Lindenberger, Darien, IL (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C10C / ;
U.S. Cl.
CPC ...
208 39 ; 208 22 ; 208 45 ; 208188 ; 252328 ; 201 41 ;
Abstract
A method for dewatering tar-water mixtures obtained from the coking of coal is disclosed. The method involves adding to the tar from 150 to 3,000 ppm of a di-tri butyl ethoxylated phenol compound dissolved in water, heating the tar-water mixture, and then agitating it to allow contact with the chemical additive. This is followed by allowing the mixture to settle forming an aqueous upper phase and a lower dewatering tar phase.