发明名称 |
Process for producing a polyol |
摘要 |
A process for producing a polyol by reacting an aliphatic aldehyde with formaldehyde in the presence of a basic catalyst, which comprises a step of concentration which comprises removing water and unreacted formaldehyde from a reaction liquid by distillation; a step of extraction which comprises extracting the polyol from a concentrated reaction liquid with an extracting reagent; a step of washing with water which comprises washing an extract liquid with water and separating the liquid into an oil layer containing the polyol and an aqueous layer; wherein by useing an specific aliphatic aldehyde as the extracting agent and recovering the extracting reagent from the oil layer containing the polyol after adjusting pH of the oil layer, a high purity polyhydric alcohol can be obtained at a high yield with suppressed formation of byproducts such as acetal compounds and aldol compounds.
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申请公布号 |
US7087800(B2) |
申请公布日期 |
2006.08.08 |
申请号 |
US20010874276 |
申请日期 |
2001.06.06 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC |
发明人 |
NINOMIYA TERUYUKI;WATANABE TOSHIO;IWAMOTO ATSUSHI;MIYASHITA SOEMU;WATANABE MASAFUMI |
分类号 |
C07C27/26;C07C29/38;C07C29/80;C07C29/86 |
主分类号 |
C07C27/26 |
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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