发明名称 |
PROCESS IMPROVEMENT TO PRODUCE LOW COLOR TRIMETHYLOLPROPANE |
摘要 |
Disclosed is a process for acquiring crude trimethylolpropane (TMP) of low reacted color. TMP is generally prepared by the condensation of n-butyraldehyde and formaldehyde in an alkali solution. The mixture is then concentrated and placed through an extractor. It has been found that a high concentration of low color TMP is present in the extractor and may be obtained by taking a slip stream of hot organic/water/TMP from the extractor and allowing the mixture to cool and phase separate. Upon separation of the phases, TMP generally having an acid wash color of about or less than 5 GU is recovered from the water phase. Disclosed is use of a single and multistage extractor.
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申请公布号 |
WO9920586(A1) |
申请公布日期 |
1999.04.29 |
申请号 |
WO1998US20353 |
申请日期 |
1998.09.29 |
申请人 |
CELANESE INTERNATIONAL CORPORATION |
发明人 |
SUPPLEE, CAROLYN;LAUREL, RODOLFO, W.;SEAMAN, GEORGE, C. |
分类号 |
C07C31/22;C07C29/16;C07C29/86;(IPC1-7):C07C29/86 |
主分类号 |
C07C31/22 |
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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