Process for the preparation of tertiary aminocarbonates and amin

Details Process for the preparation of tertiary aminocarbonates and amin Process for the preparation of tertiary aminocarbonates and amin

1995-06-07

1996-10-08

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbonate esters

564468, C07C 6806, C07C20900

Patent

active

055632882

ABSTRACT:
The invention relates to processes for producing di-(tertiary aminoalkyl) carbonate including the step of reacting a tertiary alkanolamine with methyl alkyl carbonate in the presence of a transesterification catalyst to form tertiary aminoalkyl alkyl carbonate, wherein some of the tertiary alkanolamine reacts with the tertiary aminoalkyl alkyl carbonate to form di-(tertiary aminoalkyl) carbonate. The invention also relates to processes for producing di-(tertiary aminoalkyl) carbonate including the steps of (i) reacting dimethyl carbonate with an alcohol in the presence of a transesterification catalyst to form a methyl alkyl carbonate, and (ii) reacting a tertiary alkanolamine with the methyl alkyl carbonate formed in step i) in the presence of a transesterification catalyst to form tertiary aminoalkyl alkyl carbonate, wherein some of the tertiary alkanolamine reacts with the tertiary aminoalkyl alkyl carbonate to form di-(tertiary aminoalkyl) carbonate.

REFERENCES:
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patent: 4324739 (1982-04-01), Zondler et al.
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patent: 4734518 (1988-03-01), Knifton
patent: 5175333 (1992-12-01), Kerschner et al.
patent: 5214142 (1993-05-01), King
Abstract, Knifton, John F., U.S. Patent 4,734,518 A, 29 Mar. 1988.
Abstract, Duranleau, Roger G., Texaco, Inc., U.S. 4,691,041 A, 1 Sep. 1987.
F. G. Willeboordse, et al., "Kinetics and Catalysis of Urethane Foam Reactions", Journal of Cellular Plastics pp. 76-84, Jan. 1965.
Procut literature, EniChem Synthesis SpA, "Dimethyl Carbonate DMC", 1993.

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