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1. (WO2016055466) METHOD FOR RECOVERING METHYL ACETATE

Pub. No.:    WO/2016/055466    International Application No.:    PCT/EP2015/073033
Publication Date: Fri Apr 15 01:59:59 CEST 2016 International Filing Date: Wed Oct 07 01:59:59 CEST 2015
IPC: C07C 51/42
C07C 51/44
C07C 51/48
C07C 63/26
B01D 3/14
Applicants: INVISTA TECHNOLOGIES S.À R.L.
Inventors: JACKSON, Christopher Howard
LIMBACH, Antony Peter John
GUPTA, Anuj
ROBERTS, Iain James Olson
Title: METHOD FOR RECOVERING METHYL ACETATE
Abstract:
The present invention provides a method for recovering a derivative of an organic solvent from a first process stream comprising the organic solvent, water, and the derivative of the organic solvent in a process for the production of an aromatic dicarboxylic acid comprising the catalytic oxidation of a hydrocarbon precursor in the organic solvent in an oxidation reactor, comprising the steps of: i) feeding the first process stream to a stripping device comprising a stripping column and sump; ii) removing a purified organic solvent stream from the sump; and iii) transferring an overhead stream from the stripping column to a condenser, wherein the mass concentration of the derivative of the organic solvent in the purified organic solvent stream removed from the sump in step ii) is lower than the mass concentration of the derivative of the organic solvent in the first process stream fed to the stripping device in step i), and, optionally, wherein the mass concentration of the derivative of the organic solvent in the overhead stream transferred to the condenser in step iii)is greater than the mass concentration of the derivative of the organic solvent in the first process stream fed to the stripping device in step i). The present invention further provides apparatus for carrying out the method, and a process for the production of an aromatic dicarboxylic acid incorporating the method.