Shell Oil Comapny

Cansolv Technologies Inc.

Patrick M. Ravary

Leo E. Hakka

John Nicholas Sarlis

Paul Joseph Parisi

Shell Global Solutions International B.v.

Vijay Bhambhani Godhwani

Melina Infantino

Matthew Campbell

Patrick M Ravary

Paul-Emannuel Joseph Joseph Just

Philippe Micone

Joe Gelder

Farhang Abdollahi

Menno Bastiaan Hendrik Gierman

Vijay Bhambhani-Godhwani

Leo E Hakka

The invention relates to a process for removing hydrogen sulfide and carbon dioxide from a feed gas stream. H2S in the feed gas stream is converted to elemental sulfur in a Claus unit. At least a part of the gas stream obtained is contacted with an aqueous lean absorbing medium in an absorption zone at a pressure between 0.9 and 2 bara. The aqueous lean absorbing medium used comprises one or more amines chosen from: &#x2014;a polyamine in the absence of tertiary amine functionalities having a pKa sufficient to neutralize carbamic acid, the polyamine having at least one primary amine functionality having a pKa smaller than 10.0 at 25&#xb0; C., &#x2014;a polyamine in the absence of tertiary amine functionalities having a pKa sufficient to neutralize carbamic acid, the polyamine having at least one secondary amine functionality having a pKa for each sorbing nitrogen smaller than 10.0 at 25&#xb0; C. The process is improved as compared to a process involving Claus off-gas treatment with (activated) MDEA. Effective CO2 removal is achieved while at the same time a simplified line-up with less equipment can be used.

Process for producing a purified gas stream

A process for the regeneration of an acid gas absorbent comprising an amine and heat stable salts by phase separation, comprising a) mixing the acid gas absorbent with an alkaline solution, to form a mixture with a pH above the pH equivalence point of the amine; b) cooling the mixture to a temperature below 500 C; c) separating the mixture into a regenerated acid gas absorbent and a waste stream; d) collecting the regenerated acid gas absorbent separate from the waste stream.

Process for the removal of heat stable salts from acid gas absorbents

A method of producing sulphuric acid from a sour tail gas comprises (a) obtaining a sour tail gas stream comprising HS or reduced sulphur species or a combination thereof from an oil and gas facility; (b) subjecting the sour tail gas stream to oxidation and obtaining an oxidized gas stream comprising SO; and, (c) utilizing the oxidized gas stream to obtain sulphuric acid and a SOreduced tail gas stream. The method may further comprise subjecting the oxidized gas stream to a regenerable absorption process. The sulphuric acid may be used to produce fertilizer.

Processes for producing sulfuric acid from sour tail gas field

A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the concentration of heat stable salts in the feed stream provided to the cation exchange unit is limited.

Method for treating a diamine absorbent stream

A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the cation exchange resin is regenerated using sulfurous acid reflux.

Process for the regeneration of an ion exchange resin using sulfurous acid

Growing community of inventors

Laval, Canada

John Nicholas Sarlis