Production of sodium diformate

Details Production of sodium diformate Production of sodium diformate

2011-01-11

2011-01-11

Zucker, Paul A (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07868203

ABSTRACT:
The present invention relates to a process for producing a solid sodium diformate preparation having a formic acid content of at least 35% by weight based on the total weight of sodium diformate preparation, in which, at elevated temperature, an aqueous solution (E) is produced which comprises sodium formate and formic acid in a molar ratio of HCOOH:HCOONa of greater than 1.5:1 and which has a molar ratio of HCOOH:H2O of at least 1.1:1, the aqueous solution (E) is brought to crystallization to obtain a solid phase (F) and a mother liquor (G), and the solid phase (F) is separated off from the mother liquor (G),(i) the mother liquor (G) being fed to a distillation apparatus (DV);(ii) the mother liquor (G) in the distillation apparatus (DV) being admixed with a sodium-comprising base (A) to obtain a mixture (B) comprising sodium formate and formic acid;(iii) admixing the mixture (B) obtained from step (ii) with formic acid (D) to obtain the aqueous solution (E); and(iv) excess water (C) essentially being ejected only by withdrawal from the distillation apparatus (DV);and also to the use of a solid sodium diformate preparation obtainable by the inventive process as feed additive for animal feed, in particular for monogastric animal feed and especially for animal feed for hogs and/or poultry.

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Gmelins Handbuch der anorganischen Chemie [Gmelin's Handbook of Inorganic Chemistry], 8th edition, No. 21, pp. 816-819, Verlag Chemie GmbH, Berlin 1928.
Gmelins Handbuch der anorganischen Chemie [Gmelin's Handbook of Inorganic Chemistry], 8th edition, No. 22, pp. 919-921, Verlag Chemie GmbH, Berlin 1937.

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