Process for exchanging dispersing medium of terephthalic...

Details Process for exchanging dispersing medium of terephthalic... Process for exchanging dispersing medium of terephthalic...

C - Chemistry, Metallurgy

07

C

260/531.7

C07C 51/47 (2006.01) C07C 51/42 (2006.01) C07C 63/26 (2006.01)

Patent

CA 1316939

PROCESS FOR EXCHANGING DISPERSING MEDIUM OF TEREPHTHALIC ACID SLURRY ABSTRACT OF THE DISCLOSURE A process for exchanging a dispersing medium of a terephthalic acid slurry by introducing an aliphatic carboxylic acid slurry of terephthalic acid into a multi-stage column at the upper part thereof and introducing water at the lower part thereof to form an upflowing stream of water in the multi-stage column, while a sedimentation of terephthalic acid particles is effected, and withdrawing an aqueous aliphatic carboxylic acid solution from the upper part of the multi-stage column and an aqueous slurry of terephthalic acid from the lower part of the multi-stage column.

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