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:
Jan. 22, 1991
Filed:
Jul. 10, 1989
Applicant:
Inventors:
Earl G Adams, Grand Bay, AL (US);
Arthur C Bayer, Ocean Springs, MS (US);
Alan D Farmer, Biloxi, MS (US);
Brenda J Hook, Gautier, MS (US);
Assignee:
First Chemical Corporation, Pascagoula, MS (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210634 ; 210909 ;
Abstract
A process for selectively recovering a nitrophenolic by-product from nitration waste water in substantially pure form by solvent extraction is provided. The pH of the waste water is adjusted using an acid to affect the solubility of a particular nitrophenolic by-product in the waste water so that the by-product is selectively separable from the other components of the nitration waste water by solvent extraction.