Process for the continuous preparation of aryl carbonates

Details Process for the continuous preparation of aryl carbonates Process for the continuous preparation of aryl carbonates

1994-03-04

1996-06-04

Dees, Jose G.

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

Organic compounds

Carbonate esters

558274, C07C 6996

Patent

active

055234518

ABSTRACT:
Organic carbonates which contain at least one aromatic ester group can be obtained continuously from carbonates, which contain at least one aliphatic ester group, and a phenolic compound in the presence of a transesterification catalyst known per se in that the reaction is carried out in a bubble column reactor or in a cascade of at least two bubble column reactors in such a way that the phenolic compound is metered into the first bubble column and the carbonate containing at least one aliphatic ester group is metered into each individual bubble column, but preferably only into the last bubble column. The carbonate containing at least one aromatic ester group is taken off in the liquid state from the last bubble column. Volatile reaction products, for example eliminated alcohol or a dialkyl carbonate are taken off at the upper end of each individual bubble column, preferably at the upper end of the first bubble column.

REFERENCES:
patent: 4410464 (1983-10-01), Hallgren
patent: 5210268 (1993-05-01), Fukuoka et al.
patent: 5362901 (1994-11-01), Wagner et al.
Patent Abstract of Japan, JP 4230242, Aug. 19, 1992 vol. 16, No. 581 (C-1012); Fukuoka Shinsuke, "Continuous Production of Diaryl Carbonate"; p. 1.
Patent Abstracts of Japan, JP 4235951, Aug. 25, 1992, vol. 16, No. 584 (C-1013) ; Fukuoka Shinsuke, "Continuous Production of Diaryl Carbonate"; p. 1.

Affiliated with

Also associated with

Rating

Process for the continuous preparation of aryl carbonates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the continuous preparation of aryl carbonates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the continuous preparation of aryl carbonates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-384643