发明名称 |
Process for the preparation of sorbic acid or salts thereof |
摘要 |
The invented process produces sorbic acid or its salt through the decomposition of a polyester obtained from ketene and aldehyde, and includes the step of treating a solution containing-sorbic acid or its salt with a chemically activated carbon, which sorbic acid or its salt is produced by the decomposition of the polyester. The treatment with activated carbon is performed, for example, at pH ranging from 5.8 to 7.5 at temperatures ranging from 30° C. to 80° C. The invented process can efficiently remove colored substances and can easily yield a high quality sorbic acid having a satisfactory hue in a high yield.
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申请公布号 |
US6509498(B1) |
申请公布日期 |
2003.01.21 |
申请号 |
US20000555254 |
申请日期 |
2000.05.26 |
申请人 |
DAICEL CHEMICAL INDUSTRIES, LTD. |
发明人 |
YAMASHITA AKIRA;KOUNO MITSUHIRO |
分类号 |
C07C51/09;C07C51/47;C07C57/10;(IPC1-7):C07C51/42 |
主分类号 |
C07C51/09 |
代理机构 |
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地址 |
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