发明名称 |
Azeotropic distillation of hydroxyacetic acid |
摘要 |
The yield of hydroxyacetic acid produced from formaldehyde, water and carbon monoxide in the presence of a sulfuric acid catalyst and using crude recycled hydroxyacetic acid as the reaction medium is improved by azeotropic distillation of crude, recycle hydroxyacetic acid with toluene. The distillation step reduces the water content of feed thereby increases conversion of formaldehyde to hydroxyacetic acid and reduces formic acid content in the product.
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申请公布号 |
US4431486(A) |
申请公布日期 |
1984.02.14 |
申请号 |
US19820367753 |
申请日期 |
1982.04.12 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
BALMAT, JEAN L. |
分类号 |
C07C51/12;(IPC1-7):B01D3/36 |
主分类号 |
C07C51/12 |
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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