Method for the isolation of trimethylolpropane from a...

Details Method for the isolation of trimethylolpropane from a... Method for the isolation of trimethylolpropane from a...

2006-09-26

2006-09-26

Price, Elvis O. (Department: 1621)

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

Organic compounds

Oxygen containing

Reexamination Certificate

active

07112707

ABSTRACT:
Trimethylolpropane is isolated from a reaction mixture which has been obtained by reaction of n-butyraldehyde with formaldehyde in the presence of a base and, if appropriate, hydrogenation of the resulting mixture by distilling the mixture by means of a dividing wall column or a distillation column with a precolumn or a distillation column with an after-column. The process has low capital costs and a low energy consumption and gives reduced formation of high-boiling by-products.

REFERENCES:
patent: 6187971 (2001-02-01), Kratz et al.
patent: 2002/0189926 (2002-12-01), Dembach et al.
patent: 199 63 435 (2001-07-01), None
patent: 1 013 631 (2000-06-01), None
patent: WO 98/28253 (1998-07-01), None

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