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公开(公告)号：JPS5390233A
公开(公告)日：1978-08-08
申请号：JP232477
申请日：1977-01-14
Applicant: TORAY INDUSTRIES
Inventor： MIYAZAKI KEN , SAEKI NOBUO , NOGUCHI YOSHIO
Abstract: PURPOSE:To purify the terephthalic acid, obtd. by oxidation of p-xylene, by multi-stage treatment in water, acetic acid or the like; that is, by treating at >= 140 deg.C in at least one of the stages, and recycling the filtrate of the latter stage as a purification medium for the preceding stage.
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