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US 11,746,080 B2Granted
Methods of reducing color in alkanolamine compositions and compositions produced thereby
AssigneeSabic Global Technologies B.V.
InventorsFeng Xu, Flaiyh Al-Anazi
Life of this patent
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Abstract
A method of reducing color in an alkanolamine is described. The method includes contacting the alkanolamine with a color-reducing amount of a borane complex effective to provide a color-reduced alkanolamine composition having a Platinum-Cobalt Color Value, according to Test Method ASTM D1209, of less than 50.
Claims10
A color-reduced alkanolamine composition, the composition comprising:
- an alkanolamine;
- and
- from 5 to 30 wt. % of a borane complex of the formula L·BRaH3-a;
- wherein:
- L is ammonia;
- at least one R group is a C1-12 alkyl group;
- and
- wherein a is 1 or 2;
- wherein the alkanolamine is a mono(C1-10 alkanol)amine, a di(C1-10 alkanol)amine, a tri(C1-10 alkanol)amine, an N-(C1-10 alkyl) di(C2-4 alkanol)amine, an N,N-di(C1-10 alkyl) (C2-4 alkanol)amine, an N-(C1-10 alkanol)pyrrolidine, N-(C1-10 alkanol)imidazolidine, an N-(C1-10 alkanol)piperidine, an N-(C1-10 alkanol)piperazine or a combination comprising at least one of the foregoing.
6 more elements
A color-reduced alkanolamine composition, the composition comprising:
- an alkanolamine and from 5 to 30 wt. % of a borane complex based on the weight of the composition, wherein the composition has a Platinum-Cobalt Color Value, Test Method ASTM D1209, of less than 50, wherein:
- the borane complex is of the formula
- L·BRaH3-a
- wherein L is ammonia and each R is a C1-12 alkyl group, wherein a is 1 or 2.
1 more element
A color-reduced alkanolamine composition, the composition comprising:
- an alkanolamine and from 5 to 30 wt. % of a borane complex of the formula L·BRaH3-a;
- wherein L is ammonia;
- wherein at least one R group is present and is selected from the group consisting of a C1-12 alkyl group, a C3-8 cycloalkyl group, a C3-7 heterocycloalkyl group, a C6-10 aromatic group and a C3-15 heteroaromatic group;
- and
- wherein a is 1 or 2.
2 more elements
Dependencies are inferred from the claim text.