Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1997-12-15
1999-04-06
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
560205, C07C 2748, C07C 6952
Patent
active
058921036
ABSTRACT:
The present invention provides a process for producing a carboxylic acid ester by reacting a carboxylic acid with an alcohol in a suspension of a strongly acidic cation exchange resin which is a catalyst, which process comprises introducing a reaction mixture slurry containing said ion exchange resin, from a reactor for the above reaction to a resin-separating vessel, separating, in said resin-separating vessel, said reaction mixture slurry into a clear solution and a slurry-like high-concentration mixture, and discharging the clear solution from the upper section of the resin-separating vessel and the slurry-like high-concentration mixture from near the bottom of the resin-separating vessel to circulate it into the reactor. Preferably, the resin-separating vessel is operated under such conditions that the ascending speed of the clear solution becomes 0.003 m/sec or less. The process allows efficient separation/recovery of ion exchange resin from reaction mixture and reuse of recovered resin in the reaction.
REFERENCES:
patent: 3882167 (1975-05-01), Lohmar et al.
Sogabe Hideki
Takeda Takahiro
Geist Gary
Nippon Shokubai Co. , Ltd.
Parsa Jafar
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