发明名称 |
Process for removal and recycle of p-toluic acid from terephthalic acid crystallizer solvent |
摘要 |
A process for the removal of para-toluic acid from purified terephthalic acid is disclosed. This process comprises extracting the para-toluic acid with paraxylene from the aqueous terephthalic acid-water phase and recycling the para-toluic acid and paraxylene to the paraxylene oxidation reactor. The process improves the overall yield of purified terephthalic acid recovered. Purified terephthalic acid is used as a basic raw material in the manufacture of polyester fibers and films.
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申请公布号 |
US4500732(A) |
申请公布日期 |
1985.02.19 |
申请号 |
US19830532461 |
申请日期 |
1983.09.15 |
申请人 |
STANDARD OIL COMPANY (INDIANA) |
发明人 |
PETTY-WEEKS, BRUCE C.;ZEITLIN, MARTIN A. |
分类号 |
C07C51/48;(IPC1-7):C07C51/43 |
主分类号 |
C07C51/48 |
代理机构 |
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