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:
Jun. 04, 1991
Filed:
Sep. 29, 1989
Applicant:
Inventors:
Ralph E Hise, Shaker Heights, OH (US);
W Jeffrey Cook, Cleveland Heights, OH (US);
Assignee:
CNG Research Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; F25J / ;
U.S. Cl.
CPC ...
4235 / ; 62 12 ;
Abstract
A sulfur recovery process including a Claus reaction wherein sulfur-containing compounds are converted to elemental sulfur in the presence of a stoichiometric excess of hydrogen sulfide. The sulfurous compounds in the tail gas of the Claus reaction are separated for recycle using crystallization. Liquid carbon dioxide absorption is used to separate substantially all sulfur-containing compounds from a residual tail gas suitable for venting to the atmosphere.