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:
Sep. 20, 1977
Filed:
Mar. 03, 1976
Applicant:
Inventors:
Fritz Wohler, Frankfurt am Main, DT;
Hans-Martin Stonner, Schwalbach, DT;
Paul Wiesner, Oberursel, DT;
Assignee:
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DT;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01C / ; C01C / ; B01D / ;
U.S. Cl.
CPC ...
423352 ; 55 46 ; 55 68 ; 55 70 ; 210 18 ; 210 21 ; 423236 ; 423238 ;
Abstract
A process for the recovery of pure concentrated ammonia in which the gaseous products of coal gasification or degassing are condensed or are washed with water to produce a phenolic-containing liquid phase (gas water), this liquid is dephenolated by extraction with a solvent, the phenol is recovered from the solvent and the gas is driven from the liquid phase. The gas is washed with circulated phenol and residual solvent is eliminated therefrom after NH.sub.3 is removed by washing.