US 5,705,090 AGranted

Absorption of mercaptans

AssigneeUnion Carbide Chemicals & Plastics Technology Corporation

InventorsPaul Garland, Craig Norman Schubert, Richard Alan Gregory, Eduardo Garcia-Rameau, Rickey Epps, David Burns, Robert Jerry Hlozek

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Abstract

Absorption solvents for removing mercaptans from gas streams are disclosed. The absorption solvents comprise an alkylether of a polyalkylene glycol, e.g., methoxytriglycol, and a secondary monoalkanolamine, e.g., N-methylethanolamine, as well as optionally other amines, e.g., methyldiethanolamine and diethanolamine. The absorption solvents do not require the presence of iodine for removal of mercaptans. Absorption processes utilizing the solvents are also disclosed.

Claims1

Dependent claims

An absorption solvent for use in an acid gas scrubbing process, consisting essentially of:

(i) from about 30 to 60 weight percent of the absorption solvent on an anhydrous basis of methoxytriglycol;
(ii) from about 1 to 15 weight percent of the absorption solvent on an anhydrous basis of N-methylethanolamine;
(iii) from about 10 to 40 weight percent of the absorption solvent on an anhydrous basis of diethanolamine;
(iv) from about 5 to 20 weight percent of the absorption solvent on an anhydrous basis of methyldiethanolamine;
and
(v) from about 0.1 to 80 weight percent water based on the total weight of the absorption solvent.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/708,978Filed 6 Sep 1996 · division
Priority: 9 Nov 1993
Granted: 6 Jan 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B01D 53/1487
By absorption: removing organic compounds
B01D 53/1493
By absorption: selection of liquid materials for use as absorbents
B01D 2257/306
Sulfur compounds: organic sulfur compounds, e.g. mercaptans
B01D
Separation

Family

Serial149,077Parent of this continuation · filed 9 Nov 1993
Serial501,702Parent of this division · filed 12 Jul 1995
US 5,589,149 AParent of this division
US 5,705,090 AThis patent

From the US filing history. Foreign family members aren’t listed.

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