Manufacture of ferrous picrate and additives containing same
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United States of America Patent
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Feb 24, 1998
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N/A
app pub date -
May 17, 1996
filing date -
May 19, 1993
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Abstract
A process for preparing ferrous picrate is disclosed. The process includes the step of reacting under substantially non-oxidising conditions ferrous carbonate substantially free from ferric compounds with a substantially water-free solution of picric acid in a solvent medium to produce a solution of ferric picrate. The solvent medium is selected from aromatic hydrocarbon solvents, mixtures of aromatic hydrocarbon solvents, straight-or branched-chain aliphatic alcohols, mixtures of straight or branched-chain aliphatic alcohols, and mixtures of straight- or branched-chain aliphatic alcohols and aromatic hydrocarbon solvents. The reaction is preferably carried out under a continuously maintained inert atmosphere and at a temperature between 10.degree. C. and 120.degree. C.
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