Patents by Inventor Tushar Ramchandra Deshpande

Tushar Ramchandra Deshpande 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 preparing L- (+) -lactic acid
    Patent number: 7820859
    Abstract: The present invention provides a commercially viable process for the preparation of highly pure and optically active L-(+)-lactic acid and S-(?)-methyl lactate, in high yield, obtained from esterification of aqueous crude lactic acid solution produced by sugar cane juice fermentation broth and methanol in continuous counter current trickle phase approach or in continuous counter current bubble column manner, using stabilizers and the methyl lactate so obtained is recovered and followed by purification of reasonably pure methyl lactate using reagent mixture such as sodium bi-carbonate, mono-ethanolamine or di-ethanolamine, urea or sodium-bicarbonate, mono-ethanolamine or di-ethanolamine, thiourea to reduce the impurity of dimethyl ester of dicarboxylic such as dimethyl oxalate or di-methyl succinate or methyl ester of mono-carboxylic acid such as methyl pyruvate present as an impurity, so as to get highly pure S-(?)-methyl lactate followed by hydrolyzing highly pure S-(?)-methyl lactate using highly pure lacti
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: October 26, 2010
    Assignee: Council of Scientific & Industrial Research
    Inventors: Prashant Purushottam Barve, Bhaskar Dattatreya Kulkarni, Sanjay Narayan Nene, Ravindra William Shinde, Milind Yashwant Gupte, Chandrashekhar Narayan Joshi, Gandhali Arun Thite, Vilas Bhiku Chavan, Tushar Ramchandra Deshpande
  • PROCESS FOR PREPARING L- (+) -LACTIC ACID
    Publication number: 20090203937
    Abstract: The present invention provides a commercially viable process for the preparation of highly pure and optically active L-(+)-lactic acid and S-(?)-methyl lactate, in high yield, obtained from esterification of aqueous crude lactic acid solution produced by sugar cane juice fermentation broth and methanol in continuous counter current trickle phase approach or in continuous counter current bubble column manner, using stabilizers and the methyl lactate so obtained is recovered and followed by purification of reasonably pure methyl lactate using reagent mixture such as sodium bi-carbonate, mono-ethanolamine or di-ethanolamine, urea or sodium-bicarbonate, mono-ethanolamine or di-ethanolamine, thiourea to reduce the impurity of dimethyl ester of dicarboxylic such as dimethyl oxalate or di-methyl succinate or methyl ester of mono-carboxylic acid such as methyl pyruvate present as an impurity, so as to get highly pure S-(?)-methyl lactate followed by hydrolyzing highly pure S-(?)-methyl lactate using highly pure lacti
    Type: Application
    Filed: December 30, 2005
    Publication date: August 13, 2009
    Applicant: COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
    Inventors: Prashant Purushottam Barve, Bhaskar Dattatreya Kulkarni, Sanjay Narayan Nene, Ravindra William Shinde, Milind Yashwant Gupte, Chandrashekhar Narayan Joshi, Gandhali Arun Thite, Vilas Bhiku Chavan, Tushar Ramchandra Deshpande