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:
Apr. 27, 1999
Filed:
Sep. 23, 1997
Johannes Borsboom, Rijswijk, NL;
Jan Adolf Lagas, Monnickendam, NL;
Comprimo B.V., Amsterdam, NL;
Gastec N.V., Apeldorn, NL;
Abstract
A process for the recovery of sulfur from a hydrogen sulfide containing gas, comprising oxidizing hydrogen sulfide with oxygen, and then reacting the product gas of this oxidation further by using at least two catalytic stages. The H.sub.2 S concentration in the gas leaving the last catalytic stage is controlled to have a value ranging between 0.8 and 3% by volume by reducing the quantity of combustion or oxidation air passed to the oxidation stage and/or causing a portion of the hydrogen sulfide-containing feedstock gas to bypass the oxidation stage and to be added to the gas flowing to a catalytic stage. The gas leaving the last catalytic stage is introduced into a heat exchanger having a wall temperature below the solidification point of sulfur and above the dew point of water, wherein the sulfur deposits on the heat exchanger wall and is removed with the aid of gravity.