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Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Catalysts
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Abstract
A process for preparing a carboxylic acid having (n+1) carbon atoms (e.g. acetic acid) from an alcohol having n carbon atoms (e.g. methanol) by liquid phase, rhodium catalyses carbonylation is provided. The process is characterized by using a catalyst stabilizer selected from certain classes of imidazolium iodides, alkyl substituted pyridinium iodides and hydroxypyridinium iodides. Most preferred are those derived from the amines 2-ethyl-4-methyl imidazole, 4-ethylpyridine, 4-t-butylpyridine and 3,4-lutidine by quarternisation with a methyl group.
JO19901632A1989-08-151990-06-24Process for preparing carboxylic acids
JO1632B1
(en)
method of removal of iodide compounds from liquid (c2-c6) carbonaceous acids and/or their anhydrides of acids and method for removal of admixtures of (c1-c10) alkyl iodides from liquid acetic acid and/or acetic anhydride
Process for removing metallic corrosion products from a contaminated catalyst solution produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether