Patent ID: 6858753
Filing Date: 2005-02-22
Classification: C07C

Abstract:
1. A process for the preparation of a carboxylic acid from the corresponding aliphatic alcohol, said process comprising reacting a nickel source, an iodide source, and a ligand or promoter in a solvent under carbon monoxide atmosphere to obtain an in situ catalyst complex, contacting a mixture of aliphatic alcohol and carbon monoxide with said catalyst complex at a temperature in the range of 100 to 400° C. and a pressure in the range of 5 to 3000 psig, for a minimum of 30 minutes, and separating the product obtained, and wherein the ligand or promoter comprises a heterocyclic organic compound containing at least two heteroatoms of which at least one is selected from S— and N—, and wherein the heterocyclic compound is selected from the group consisting of morpholine, 1,4 thioxane, 2,2′bithiophene, thiamorpholine, thianthrene, 1,4 dithiane, 1,2-ethaneditiol and 2-mercapto pyridine.