Process improvement to produce low color trimethylolpropane

Details Process improvement to produce low color trimethylolpropane Process improvement to produce low color trimethylolpropane

1997-10-16

1999-09-07

Kumar, Shailendra

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568853, 210639, 210634, C07C 2726

Patent

active

059489430

ABSTRACT:
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 by 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.

REFERENCES:
patent: 3956406 (1976-05-01), Palmer et al.
patent: 5603835 (1997-02-01), Cheung et al.

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