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REVISTA DE CHIMIE
Cite as: Rev. Chim.
https://doi.org/10.37358/Rev.Chim.1949

OSIM Nr. R102355
ISSN 0034-7752
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Revista de Chimie, Volume 59, Issue 1, pp. (2008)




Study Concerning the Qualitative Improvement of Formic Acid and Sodium Formate

Abstract:

The technical grade formic acid containing iron ions under the maximum limits (0,015 % Fe) presents sometimes a pink colour affecting the quality. In order to eliminate this colour the formic acid solution was passed through several absorbents. Among those, the best proved to be the cationite C 100 H. The pink colour dissapears at an iron content below 0,002% Fe. The crystalline powder of the technical grade sodium formate become agglomerate by the absorbtion of the atmospheric humidity. This phenomenon may be prevented by covering the crystals with a sodium stearate film (0,5 ± 0,1 % sodium stearate), achieved in certain conditions. Keywords: Formic acid, sodium formate, purification

Issue: 2008 Volume 59, Number 1
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