Title:
MANUFACTURE OF AROMATIC CARBONIC ESTER
Document Type and Number:
Japanese Patent JPS5448733
Kind Code:
A
Abstract:
1. A process for the production of aromatic carbonic acid esters by transesterifying dialkyl carbonates with phenols under the elimination of alcohols and in the presence of transesterification catalysts, wherein organo tin compounds of the general formula I (R**1 )-Sn-(Y)x 4-x in which Y represents an see diagramm : EP0000879,P5,F2 OH or OR**2 radical, R**2 denoting a C1 -C12 alkyl radical, a C6 -C12 aryl radical or a C7 -C13 alkylaryl radical, and R**1 has the meaning of R**2 and x denotes an integer from 1 to 3, or dialkyl tin oxides each with 1-12 C-Atoms in the alkyl radical or organo tin compounds of the general formula II see diagramm : EP0000879,P5,F4 in which R**1 and R**4 are the same or different and have the above-indicated meaning of R**2 , and R**5 has the meaning of R**2 or represents a radical OR**6 in which R**6 has the meaning of R**2 are used as reesterification catalysts, in quantities of from 0.001 to 20% by weight, based on the total amount of the reaction mixture.
Inventors:
HAINRITSUHI KURIMU
HANSUUYOZEFU BUISHIYU
HANSU RUDORUFU
HANSUUYOZEFU BUISHIYU
HANSU RUDORUFU
Application Number:
JP9628078A
Publication Date:
April 17, 1979
Filing Date:
August 09, 1978
Export Citation:
Assignee:
BAYER AG
International Classes:
B01J31/00; B01J31/02; B01J31/12; C07C69/96; C07B61/00; C07C67/03; C07C68/06; C07C; (IPC1-7): B01J31/02; C07C68/06; C07C69/96