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US 9,352,271 B2Granted
Sterically hindered amines and associated methods
AssigneeHuntsman Petrochemical Corporation
InventorsWei-Yang Su, Robert A. Grigsby, Jr., Jingjun Zhou
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Abstract
Amine compositions comprising sterically hindered amines and associated methods are provided. In some embodiments, amine compositions of the present disclosure may be useful for selective removal of H2S from an acidic gas stream.
Claims15
An amine composition comprising:
- a mixture of at least two sterically hindered amines comprising a first amine with the formula:
- and a second amine with the formula:
- wherein x is an integer from 7 to 14;
- y is an integer from 3 to 14, and the weight ratio of the first amine to the second amine is about 2.5:1 to about 6:1.
1 more element
A method of making an amine composition comprising:
- reacting a polyethylene glycol with a tertiarybutylamine in the presence of a nickel-based hydrogenation catalyst to form an amine composition comprising a mixture of at least two sterically hindered amines, wherein the amine composition comprises at least a first amine with the formula:
- and a second amine with the formula:
- wherein x is an integer from 3 to 14;
- y is an integer from 3 to 14, and the weight ratio of the first amine to the second amine is about 2.5:1 to about 6:1.
1 more element
A method comprising:
- contacting a gaseous stream comprising sulfur-containing compounds with an amine composition comprising a mixture of at least two sterically hindered amines, wherein the amine composition comprises at least a first amine with the formula:
- and a second amine with the formula:
- wherein x is an integer from 7 to 14 and y is an integer from 7 to 14 and the weight ratio of the first amine to the second amine is about 2.5:1 to about 6:1.
Dependencies are inferred from the claim text.