Process for the production of mesitylene and durene

Details Process for the production of mesitylene and durene Process for the production of mesitylene and durene

2005-09-27

2005-09-27

Dang, Thuan D (Department: 1764)

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

C585S475000

Reexamination Certificate

active

06949687

ABSTRACT:
A process is described for the contemporaneous preparation of mesitylene and durene, characterized in that mesitylene and durene are obtained exclusively starting from pseudo-cumene without the use of any further chemical compound, operating in continuous, at a temperature ranging from 210 to 400° C., at a pressure ranging from 1 to 50 bar, with a weight space velocity ranging from 0.1 to 20 hours−1and in the presence of a catalyst based on crystalline metal-silicates in acid form. After the recovery of mesitylene and durene from the reaction raw product, some of the remaining components of the raw product itself are recycled and fed to the reactor together with the pseudo-cumene.

REFERENCES:
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patent: 5206194 (1993-04-01), Clark
patent: 5929295 (1999-07-01), Wu et al.
patent: 2.140.738 (1973-01-01), None
An Nan Ko, et al., “Isomerization and Disproportionation of 1,2,4-trimethylbenzene Over Hy Zeolite”, Journal of the Chinese Chemical Society, AN 1994:247768, XP-002299017, 1994, pp. 1-2.

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