Gas Research Institute

Crystatech, Inc.

Kevin S Fisher

David W DeBerry

Dennis Dalrymple

A process for removing H S from a gaseous stream, wherein the gaseous stream is flowed through an absorber vessel where the stream is contacted with a sorbing liquor comprising a nonaqueous solvent containing dissolved sulfur, a tertiary amine base having sufficient strength and concentration to drive the reaction between H S sorbed by the liquor and the dissolved sulfur to form a nonvolatile polysulfide which is soluble in the sorbing liquor, and a solubilizing agent for maintaining the solubility of polysulfide intermediates which may otherwise separate. The dissolved nonvolatile polysulfide in the sorbing liquor is converted to sulfur which remains dissolved in the liquor by contacting the liquor with oxidizing sulfur dioxide. The sorbing liquor following the oxidation of the polysulfide is cooled to a temperature at which the liquor is at or above saturation with respect to the dissolved sulfur. At least part of the dissolved sulfur in the saturated liquor is converted to solid particulate sulfur at a point downstream of the absorber vessel, and the solid sulfur is separated from the liquor.

Process for removing hydrogen sulfide from gas streams which include or are supplemented with sulfur dioxide, by scrubbing with a nonaqueous sorbent

A method for removal of H.sub.2 S from an H.sub.2 S-containing natural gas stream in which a high surface area contactor is inserted into the natural gas stream and at least one H.sub.2 S scavenging agent is injected into the natural gas stream upstream of the contactor, the result of which is the distribution of the H.sub.2 S scavenging agent on at least a portion of at least one surface of the contactor. The distributed H.sub.2 S scavenging agent is contacted with the natural gas stream resulting in absorption of the H.sub.2 S into the H.sub.2 S scavenging agent and reaction therewith, forming at least one byproduct. Thereafter, the byproduct is removed from the natural gas stream.

Growing community of inventors

Georgetown, TX, United States of America

Kevin S Fisher