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:
Dec. 12, 2000
Filed:
Jan. 07, 1999
Peter Schoubye, H.o slashed.rsholm, DK;
Haldor Topsoe A/S, Lyngby, DK;
Abstract
A process for continuous production of ammonium thiosulphate from H.sub.2 S, SO.sub.2, and NH.sub.3 comprising steps of producing in a first absorption step a solution of ammonium hydrogen sulphite by contacting a first gas stream comprising S0.sub.2 with NH.sub.3 and an aqueous solution comprising ammonium hydrogen sulphite in one or more absorbers connected in series and withdrawing a vent gas from one of the absorbers, passing the solution produced in the first absorption step to a second absorption step in which a second gas stream comprising H.sub.2 S is contacted with NH.sub.3 and an aqueous solution of ammonium thiosulphate thereby producing a solution being rich in ammonium thiosulphate.