PURIFICATION OF TEREPHTHALIC ACID BY CRYSTAL AGING

被引：8

作者：

BROWN, PM ^{[1
]}

MARQUERING, M ^{[1
]}

MYERSON, AS ^{[1
]}

机构：

[1] POLYTECH INST NEW YORK,DEPT CHEM ENGN,333 JAY ST,BROOKLYN,NY 11201

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1990年 / 29卷 / 10期

关键词：

D O I：

10.1021/ie00106a017

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The rate of removal of 4-carboxybenzaldehyde (4-CBA) from terephthalic acid (TPA) crystals during crystal aging was determined in both aqueous solution and 90% acetic acid (10% water by volume). It was found experimentally that over 50% of the 4-CBA could be removed from TPA crystals aged 2 h at 493 K in 90% acetic acid. It was also found that purification occurs more rapidly in 90% acetic acid than in water at the same aging conditions. A crystal aging and purification mechanism based on the oxidation of 4-CBA to TPA in the solution and periodic growth and dissolution due to temperature fluctuations was developed and used to estimate the purification rate. Estimated purification levels were within the experimental error of 15% in most cases. © 1990, American Chemical Society. All rights reserved.

引用

页码：2089 / 2093

页数：5

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