Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1973-11-29
1976-08-03
Myers, Jane S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C 6982
Patent
active
039729125
ABSTRACT:
Dimethyl terephthalate is prepared by the continuous esterification of terephthalic acid in the gas phase by evaporating solid terephthalic acid in a pre-reactor by means of a hot methanol vapor stream, conducting the gas mixture through a solid bed catalyst in a follow-up reactor, and recirculating a portion of the reaction product to the pre-reactor. After the pre-reactor the terephthalic acid dispersed in the methanol gas phase is heated and vaporized in one or more consecutive heat exchangers followed by one or more dwell period lengths and immediately heated to the esterification temperature prior to entry into the follow-up reactor.
REFERENCES:
patent: 3227743 (1966-01-01), Shaw et al.
patent: 3364251 (1968-01-01), Benning et al.
patent: 3377376 (1968-04-01), Gainer et al.
patent: 3617226 (1971-11-01), List et al.
patent: 3676485 (1972-07-01), Lewis et al.
List Ferdinand
Orlowski Friedrich-August
Pflegerl Emmerich
Wilke Norbert
Wulf Horst-Dieter
Chemische Werke Huls Aktiengesellschaft
Myers Jane S.
Wells Gilbert L.
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