Claims
- 1. A process for the preparation of an aromatic diamine which comprises reacting a primary or secondary formimine, which is prepared by reacting a linear or branched chain primary alkyl amine with a formaldehyde to form said formimine reactant characterized by possession of a linear or branched chain alkyl moiety attached to the nitrogen atom of said formimine reactant, with a tertiary aromatic amine in an anhydrous acidic medium, and recovering the resultant aromatic diamine.
- 2. The process as set forth in claim 1 in which the reaction between said alkyl formimine and said tertiary aromatic amine is effected at a temperature in the range of from about 20.degree. to about 100.degree. C. and a pressure in the range of from about atmospheric to about 100 atmospheres.
- 3. The process as set forth in claim 1 in which said anhydrous acidic medium is afforded by the presence of trichloroacetic acid.
- 4. The process as set forth in claim 1 in which said anhydrous acidic medium is afforded by the presence of trifluoroacetic acid.
- 5. The process as set forth in claim 1 in which said anhydrous acidic medium is afforded by the presence of formic acid.
- 6. The process as set forth in claim 1 in which said anhydrous acidic medium is afforded by the presence of hydrogen chloride gas.
- 7. The process as set forth in claim 1 in which said alkyl formimine is a reaction product of formaldehyde with a linear primary amine selected from the group consisting of methylamine, ethylamine, n-propylamine, n-butylamine, n-pentylamine and n-hexylamine.
- 8. The process as set forth in claim 1 in which said alkyl formimine is n-hexylformimine and said aromatic amine is N,N-dimethylaniline.
- 9. The process as set forth in claim 1 in which said alkyl formimine is n-butylformimine and said aromatic amine is N,N-diethylaniline.
- 10. The process as set forth in claim 1 in which said alkyl formimine is n-propylformimine and said aromatic amine is N,N-dimethylaniline.
- 11. The process as set forth in claim 1 in which said alkyl formimine is isobutylformimine and said aromatic amine is N,N-dimethylaniline.
- 12. The process as set forth in claim 1 in which said alkyl formimine is 2-pentylformimine and said aromatic amine is N,N-diethylaniline.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of my copending and now abandoned application Ser. No. 804,135 filed June 6, 1977, all teachings of which are incorporated herein by reference thereto.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
2750416 |
Exner et al. |
Jun 1956 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
804135 |
Jun 1977 |
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