发明名称 |
Process for producing terephthalic acid of high purity |
摘要 |
Terephthalic acid of high purity is continuously produced in a high yield by oxidizing p-tolualdehyde with a molecular oxygen-containing gas in the presence of bromine ions as a catalyst in a water solvent, contacting the resulting slurry solution containing crude terephthalic acid with an ascending stream of high temperature water of 180 DEG -320 DEG C., and withdrawing the water solvent together with the ascending stream of high temperature of water upwardly, while settling down crystalline terephthalic acid through the ascending stream of high temperature water and withdrawing the crystalline terephthalic acid together with a portion of the high temperature water downwardly.
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申请公布号 |
US4268690(A) |
申请公布日期 |
1981.05.19 |
申请号 |
US19790055198 |
申请日期 |
1979.07.02 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
KOMATSU, MAKOTO;OHTA, TAZUO;TANAKA, TORU;ODA, RYOICHI;TAKAMIZAWA, YUJI |
分类号 |
C07C51/47;B01D9/02;C07C51/00;C07C51/255;C07C51/43;C07C63/26;C07C67/00;(IPC1-7):C07C51/16;C07C51/42 |
主分类号 |
C07C51/47 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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