Patents by Inventor Sunil S Tonde

Sunil S Tonde has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of a carboxylic acid
    Patent number: 6380426
    Abstract: The present invention relates to a process for the preparation of a carboxylic acid by carbonylating the corresponding alcohol in carbon monoxide atmosphere and in the presence of water, a solvent, a palladium catalyst and a promoter system consisting of an organic or inorganic halide and an organic sulphonic acid, at a temperature in the range of 50-250° C., at a pressure in the range of 50-2000 psig for 1 to 10 hours, the concentration of the catalyst being one mole of catalyst per every 50-50000 moles of the alcohol, the amount of the organic or inorganic halide being in the range of 5-500 moles per mole of the catalyst, and the amount of the organic sulphonic acid being in the range of 5-500 moles per mole of the catalyst, collecting the resulting product.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: April 30, 2002
    Assignee: Council of Scientific and Industrial Research
    Inventors: Ashutosh A Kelkar, Sunil S Tonde, Raghunath V Chaudhari