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. 02, 2002
Filed:
Jun. 19, 2000
David Smith, Vernouillet, FR;
David Benayoun, Sartrouville, FR;
Claude Dezael, Maisons Laffitte, FR;
Institut Francais du Petrole, Rueil-Malmaison, FR;
Abstract
A process and an apparatus are described for treatment of a gas containing hydrogen sulphide and sulphur dioxide, for example a Claus plant tail gas, in which the gas is brought into contact with an organic solvent ( ) e.g. polyethylene glycol , containing a catalyst e.g. sodium salicylate, in at least one gas-liquid reactor-contactor ( ) and a gas ( ) substantially no longer containing hydrogen sulphide and sulphur dioxide is recovered. A single-phase solution ( ) of solvent and sulphur is extracted from the reactor-contactor and a portion is cooled in at least one cooling zone ( ) to obtain a suspension of sulphur crystals in the solvent, the crystallised sulphur is separated from the solvent in a separation zone ( ), the sulphur-depleted solvent ( ) is recovered and recycled at least in part to the reactor-contactor ( ), and the sulphur ( ) is recovered.