Processes for separating one or more amine byproducts from one or more desired amines
AssigneeDow Global Technologies LLC
InventorsDavid M. Petraitis, Stephen W. King
Life of this patent
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Abstract
The present invention relates to separating one or more amine byproducts from one or more desired amines. More particularly, the invention involves forming a byproduct component with one or more amine byproducts and a first adjuvant component. The byproduct component has an enhanced separation characteristic relative to separating the amine byproducts from the desired amines in the absence of an adjuvant. Preferably, the byproduct component is separated in the presence of a second adjuvant component that preferably has a boiling point less than the boiling point of the first adjuvant component.
Claims17
A process for separating one or more amine byproducts from one or more desired amines comprising the steps of:
- a) providing a composition comprising i) one or more desired amines selected from alkyleneamines represented by (a) formula (I):
- wherein x1 is a number of from 2 to 6, y1 is a number of from 1 to 6, R1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R′1 represents a group represented by the following formula (1):
- wherein x′1 is a number of from 2 to 6, x″1 is 0 or 1 and y′1 is a number of from 0 to 4 and formula (II):
- wherein x2 and x′2 are numbers of from 2 to 6, and R2 and R′2 represent a group represented by the following formula (2):
- wherein x″2, is a number of from 2 to 6 and y2 is a number of from 0 to 5,
- and one or more amine byproducts and ii) a first adjuvant component, wherein the first adjuvant component has a boiling point;
- b) causing the composition to be subjected to conditions such that at least a portion of the one or more amine byproducts and at least a portion of the first adjuvant component form a byproduct component that has an enhanced separation characteristic relative to the one or more amine byproducts that have not been subjected to said conditions;
- and
- c) separating at least a portion of the byproduct component from the composition in the presence of a second adjuvant component.
A process for separating one or more alkylethyleneamines from one or more ethyleneamines comprising the steps of:
- a) providing a composition comprising i) one or more ethyleneamines selected from monoethanolamine, diethanolamine, triethanolamine, 1,3-diaminopropane, dipropylenetriamine, 1,3-pentanediamine, 1,3-butanediamine, 2,2-dimethyl-1,3-propanediamine, 2,2-diethyl-1,3-propanediamine, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, piperazine, aminoethylpiperazine, aminoethylethanolamine, heavy polyamine, and combinations thereof,
- and one or more alkylethyleneamines and ii) a first adjuvant component comprising water, wherein the first adjuvant component has a boiling point;
- b) causing the composition to be subjected to conditions such that at least a portion of the one or more alkylethyleneamines and at least a portion of the first adjuvant component form an alkylethyleneamines component that has an enhanced separation characteristic relative to the one or more alkylethyleneamines that have not been subjected to said conditions;
- and
- c) separating at least a portion of the alkylethyleneamines component from the composition in the presence of a second adjuvant component.
A process for separating one or more amine byproducts from one or more desired amines comprising the steps of:
- a) providing a composition comprising i) one or more desired amines selected from alkyleneamines represented by (a) formula (I):
- wherein x1 is a number of from 2 to 6, y1 is a number of from 1 to 6, R1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R′1 represents a group represented by the following formula (1):
- wherein x′1 is a number of from 2 to 6, x″1 is 0 or 1 and y′1 is a number of from 0 to 4 and formula (II):
- wherein x2 and x′2 are numbers of from 2 to 6, and R2 and R′2 represent a group represented by the following formula (2):
- wherein x″2 is a number of from 2 to 6 and y2 is a number of from 0 to 5,
- and one or more amine byproducts and ii) a first adjuvant component, wherein the composition does not include water in an amount of more than one percent by weight of the total composition;
- b) causing the composition to be subjected to conditions such that at least a portion of the one or more amine byproducts and at least a portion of the first adjuvant component form a byproduct component that has an enhanced separation characteristic relative to the one or more amine byproducts that have not been subjected to said conditions;
- and
- c) separating at least a portion of the byproduct component from the composition.
Dependencies are inferred from the claim text.