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, 1990
Filed:
Feb. 17, 1989
Applicant:
Inventors:
Richard Bicker, Liederbach, DE;
Manfred Schrod, Weiterstadt, DE;
Hans Militzer, Hofheim am Taunus, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Int. Cl.
CPC ...
C01C / ;
U.S. Cl.
CPC ...
423236 ; 423240 ;
Abstract
Cyanogen halides and/or phosgene are removed from waste gases by bringing the waste gases into intimate contact with an aqueous solution of at least one amine of the formula NR.sub.3 ; in the formula, 1 or 2 of the radicals R represent an alkanol or alkylamine group having 2 or 3 carbon atoms in each case, where H and/or C.sub.1 -C.sub.2 -alkyl is bound to the nitrogen of the amine group, and the remaining groups R are H or C.sub.1 -C.sub.4 -alkyl.