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US 9,987,588 B2Granted
Sterically hindered amines and associated methods
AssigneeHuntsman Petrochemical Corporation
InventorsWei-Yang Su, Robert A. Grigsby, Jr., Jingjun Zhou
Life of this patent
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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
A mixture of at least two sterically hindered amines obtained from a method comprising:
- reacting a polyethylene glycol having a molecular weight of from about 180 g/mol to about 1000 g/mol and a tertiarybutylamine in the presence of a nickel-based hydrogenation catalyst in a reactor where at least one sterically hindered amine has a formula (1):
- and another sterically hindered amine has a formula:
- wherein x is an integer from 7 to 14, y is an integer from 3 to 14, and the weight ratio of the sterically hindered amine of formula (1) to the sterically hindered amine of formula (2) is about 2.5:1 to about 6:1.
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 3 to 14, 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.
A mixture of at least two sterically hindered amines obtained from a method comprising:
- reacting a polyethylene glycol having a molecular weight of from about 180 g/mol to about 1000 g/mol and a tertiarybutylamine in the presence of a nickel-based hydrogenation catalyst in a reactor where at least one sterically hindered amine has a formula (1):
- and another sterically hindered amine has a formula:
- wherein x is an integer from 3 to 14, y is an integer from 7 to 14, and the weight ratio of the sterically hindered amine of formula (1) to the sterically hindered amine of formula (2) is about 2.5:1 to about 6:1.
Dependencies are inferred from the claim text.