Method for increasing yield in the production of polyvalent...

Details Method for increasing yield in the production of polyvalent... Method for increasing yield in the production of polyvalent...

2007-11-27

2007-11-27

Price, Elvis O. (Department: 1621)

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

Organic compounds

Oxygen containing

C568S854000

Reexamination Certificate

active

10521810

ABSTRACT:
The invention relates to a method for increasing yield in the production of polyvalent alcohols, especially trimethylolpropane, obtained by condensing formaldehyde with a higher aldehyde. According to the inventive method, acid treatment is carried out on a mixture (high-boiling fraction) that is obtained by reprocessing, contains derivatives of said alcohols and has a higher boiling point than the respective alcohol, and the polyvalent alcohol is recovered from the acid-treated high-boiling fraction. The inventive method is characterised in that the water content of the high-boiling fraction amounts to between 20 and 90 wt. % in relation to the entire mixture of the high-boiling fraction and water.

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International Search Report dated Nov. 12, 2003, Int'l No. PCT/EP03/07870, 2 pages.

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