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:
Nov. 07, 1978
Filed:
Jan. 30, 1978
Mehmet O Tarhan, Bethlehem, PA (US);
Daniel Kwasnoski, Hellertown, PA (US);
Other;
Abstract
Hydrogen sulfide is substantially completely removed from a sulfur bearing industrial gas stream by absorbing the H.sub.2 S into a liquid absorbent, stripping the absorbent of absorbed H.sub.2 S and reacting it with SO.sub.2 in a ratio of H.sub.2 S/SO.sub.2 greater than the stoichiometric ratio of 2.0:1.0 to produce elemental sulfur and water, leaving a tail gas containing an excess of hydrogen sulfide but no sulfur dioxide. At least the last stage of the reaction is carried out in a liquid reaction medium at a temperature not greater than 160.degree. C. The excess H.sub.2 S assures complete reduction at these temperatures of all SO.sub.2 to elemental sulfur. The remaining excess H.sub.2 S is then recycled in the tail gas back into the original industrial gas stream prior to the point of contact of the industrial gas stream with the liquid absorbing solution.