Reactive amine catalysts for polyurethane foam
AssigneeHuntsman Petrochemical Corporation
InventorsRobert A. Grigsby, Jr., Robert L. Zimmerman
Life of this patent
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Abstract
A process for the separation of a first amine having a tertiary amine group and a secondary amine group such as N,N,N′-trimethylbis(aminoethyl)ether from a di-tertiary amine such as N,N,N′,N′-tetramethylbis(aminoethyl)ether, comprising: contacting a mixture of the first amine and the di-tertiary amine with a carbonyl compound capable of forming an enamine such that the carbonyl compound reacts with the first amine to form an enamine; separating the enamine from the di-tertiary amine; and subsequently converting the enamine to the first amine.
Claims18
A process for the separation of a first amine having a tertiary amine group and a secondary amine group from a di-tertiary amine, comprising:
- contacting a mixture of the first amine and the di-tertiary amine with a carbonyl compound capable of forming an enamine such that the carbonyl compound reacts with the first amine to form an enamine;
- separating the enamine from the di-tertiary amine;
- and subsequently converting the enamine to the first amine.
A process for the separation of N,N,N′-trimethylbis(aminoethyl)ether from N,N,N′,N′-tetramethylbis(aminoethyl)ether, comprising:
- contacting a mixture of the N,N,N′-trimethylbis(aminoethyl)ether and N,N,N′,N′-tetramethylbis(aminoethyl)ether with a carbonyl compound capable of forming an enamine such that the carbonyl compound reacts with the N,N,N′-trimethylbis(aminoethyl)ether to form an enamine;
- separating the enamine from the N,N,N′,N′-tetramethylbis(aminoethyl)ether;
- and subsequently converting the enamine to reform the N,N,N′-trimethylbis(aminoethyl)ether.
A N,N,N′-trialkylbis(aminoethyl)ether-enamine.
Dependencies are inferred from the claim text.