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. 07, 1981
Filed:
Feb. 13, 1980
Applicant:
Inventors:
Otto Berendes, Dormagen, DE;
Karl-Heinz Vopel, Leawood, KS (US);
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
4235 / ; 4235 / ; 71 49 ;
Abstract
Organic reaction mixtures, particularly of mixtures containing contaminant organic phosphorus compounds and/or sulfur, are worked up by introducing the mixture into water which has been made alkaline and has a temperature of from -10.degree. to +50.degree. C., a pH value of at least 10 being maintained in the resulting mixture, separating the aqueous phase from the sulfur which separates out; and contacting the aqueous phase or the sulfur which has separated out with nitric acid at an elevated temperature and a pH of below 3.