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:
Apr. 21, 1981
Filed:
May. 05, 1980
Applicant:
Inventors:
John C Little, Danville, CA (US);
Charles R Youngson, Jr, Martinez, CA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423488 ; 203 49 ; 203 91 ; 55 53 ; 55 54 ; 568495 ; 570245 ;
Abstract
Method of removing organic contaminants from aqueous hydrochloric acid comprising countercurrently contacting the aqueous acid containing the contaminants and steam at superatmospheric pressures, and recovering said aqueous acid substantially free from organic contaminants. The invention is particularly adapted for the removal of chloral from aqueous hydrochloric acid.