Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1982-01-07
1982-11-23
Sever, Frank
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
203 28, 203 41, 203 93, 203DIG19, 562593, B01D 314, C07C 5414
Patent
active
043606954
ABSTRACT:
In a process for the continuous preparation of adipic acid by hydrolysis of C.sub.1 -C.sub.4 -alkyl adipates with water at an elevated temperature in the presence of a strongly acidic ion exchanger, the improvement that the esters and excess water are fed to the middle section of a column, reaction mixture is taken off at a plurality of trays of the column below the feed point, passed over a strongly acidic ion exchanger and recycled, alkanols or alkanol/water mixtures are taken off at the top of the column and an aqueous solution of adipic acid is taken off at the bottom of the column.
REFERENCES:
patent: 3551300 (1970-12-01), Congley
Gebert Wolfgang
Magnussen Peter
Praetorius Werner
Reitz Heinrich
Schumacher Volker
BASF - Aktiengesellschaft
Sever Frank
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