Process for the reduction or elimination of hydrogen sulphide

Details Process for the reduction or elimination of hydrogen sulphide Process for the reduction or elimination of hydrogen sulphide

2006-07-18

2006-07-18

Johnson, Edward M. (Department: 1754)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

C423S228000

Reexamination Certificate

active

07078005

ABSTRACT:
The invention provides a process for reducing the level of hydrogen sulphide in a liquid or gas by treatment of the liquid or gas with an H2S-scavenger product derivable by the reaction of a carbonyl group-containing compound with an alcohol, thiol, amide, thioamide, urea or thiourea. The carbonyl group-containing compound is preferably formaldehyde, and preferably the product is derivable by reaction of formaldehyde with an amine-free alcohol or urea selected from ethylene glycol, propylene glycol, glycerol, diethylene glycol, triethylene glycol, ethyl alcohol, n-butanol, a sugar, a low molecular weight polyvinyl alcohol, castor oil fatty acid and urea. More especially, the scavenger product is used with an amine, especially monoethanolamine.

REFERENCES:
patent: 4894210 (1990-01-01), Denny et al.
patent: 5569443 (1996-10-01), Wilson et al.
patent: 6251348 (2001-06-01), Scranton, Jr.
patent: 6887445 (2005-05-01), Braga et al.

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