发明名称 |
Process for the production of high purity terephthalic acid |
摘要 |
A process for the production of high purity terephthalic acid, by subjecting a crude terephthalic acid product, resulting from the oxidation of a paradialkylbenzene and containing a 4-carboxybenzaldehyde and other impurities at a relatively high level, to an efficient purification with high yield of terephthalic acid. This process comprises subjecting a high temperature aqueous solution of the crude terephthalic acid product to (A) an oxidation treatment with an oxygen-containing gas while feeding oxygen at a feed rate in the range of 0.4-10 moles per mole of the 4-carboxylbenzaldehyde contained in the crude terephthalic acid and then to (B) a treatment with hydrogen.
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申请公布号 |
US5166420(A) |
申请公布日期 |
1992.11.24 |
申请号 |
US19910784604 |
申请日期 |
1991.10.24 |
申请人 |
MITSUI PETROCHEMICAL INDUSTRIES, LTD. |
发明人 |
SHIRAKI, SHIGEMI;MIZUNO, KENICHI |
分类号 |
C07C51/487 |
主分类号 |
C07C51/487 |
代理机构 |
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代理人 |
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地址 |
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