Method for producing anhydrous formic acid

Details Method for producing anhydrous formic acid Method for producing anhydrous formic acid

2005-01-11

2005-01-11

Richter, Johann (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S606000

Reexamination Certificate

active

06841700

ABSTRACT:
The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid, in which firstly aqueous formic acid is produced by hydrolysis of methyl formate, with the methanol content in the methyl formate having been reduced in advance. The process according to the invention has the special feature that—before the hydrolysis of the methyl formate—the methanol content of the methanol-containing methyl formate is reduced in a distillation column, this distillation column simultaneously being employed for other separation functions during work-up of the formic acid.

REFERENCES:
patent: 3983010 (1976-09-01), Rauch et al.
patent: 4326073 (1982-04-01), Wolf et al.
patent: 34 28 319 (1986-02-01), None
patent: 0 017 866 (1980-10-01), None
patent: 0 596 484 (1994-05-01), None
Ullmanns Encyklopädie der technischen Chemie 4th Ed. vol. 7, pp. 365-366.

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