Patents by Inventor Penumarthy Vijayalakshmi

Penumarthy Vijayalakshmi 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 enrichment of methyl ricinoleate from castor oil methyl esters by liquid-liquid extraction
    Patent number: 8383847
    Abstract: The present invention provides a process for the enrichment of methyl ricinoleate from castor oil methyl esters by liquid-liquid extraction (LLE) in presence of refined vegetable oils using an aqueous polar solvent. The invention provides an extraction of methyl ricinoleate by a non-destructive extraction method with good yields (75 to 90%) and purity (95 to 99%). The method consists of mixing castor oil methyl esters in a refined normal vegetable oil (feed) in a suitable proportion and selective extraction of methyl ricinoleate in a non-destructive manner by liquid-liquid extraction using a polar aqueous solvent, followed by de-solventization and drying of the solute to get enriched methyl ricinoleate fraction with good yields.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: February 26, 2013
    Assignee: Council of Scientific & Industrial Research
    Inventors: Kasturi Venkata Sesha Adinarayana Rao, Penumarthy Vijayalakshmi, Badari Narayana Prasad Rachapudi
  • PROCESS FOR THE ENRICHMENT OF METHYL RICINOLEATE FROM CASTOR OIL METHYL ESTERS BY LIQUID-LIQUID EXTRACTION
    Publication number: 20110245524
    Abstract: The present invention provides a process for the enrichment of methyl ricinoleate from castor oil methyl esters by liquid-liquid extraction (LLE) in presence of refined vegetable oils using an aqueous polar solvent. The invention provides an extraction of methyl ricinoleate by a non-destructive extraction method with good yields (75 to 90%) and purity (95 to 99%). The method consists of mixing castor oil methyl esters in a refined normal vegetable oil (feed) in a suitable proportion and selective extraction of methyl ricinoleate in a non-destructive manner by liquid-liquid extraction using a polar aqueous solvent, followed by de-solventization and drying of the solute to get enriched methyl ricinoleate fraction with good yields.
    Type: Application
    Filed: October 31, 2008
    Publication date: October 6, 2011
    Applicant: COUNCIL OF SCIENTFIC & INDUSTRIAL RESEARCH
    Inventors: Kasturi Venkata Sesha Adinarayana Rao, Penumarthy Vijayalakshmi, Badari Narayana Prasad Rachapudi
  • Process for the Preparation of Biodiesel from Vegetable Oils Containing High FFA
    Publication number: 20100205853
    Abstract: The present invention provides an improved process for the preparation of biodiesel from crude vegetable oils especially Jatropha (Jatropha curcas) and Karanja (Pongamia pinnata). In the preset invention the bio-active constituents, fatty acids and polar materials are selectively removed from the crude oils by liquid-liquid extraction with a polar solvent into the solvent phase in a non-destructive manner in specially designed equipment either in a batch mode or continuous mode and the oil left as residue is amenable for direct transesterification. After transesterification, the glycerol phase is separated and the crude biodiesel is neutralized, purified by adsorption of undesirable constituents like the residual glycerol, gums, soap, salts etc over a bed of adsorbent like Celite thereby circumventing the conventional water washing step.
    Type: Application
    Filed: September 25, 2008
    Publication date: August 19, 2010
    Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Kasturi Venkata Sesha Adinarayana Rao, Krishnasamy Saravanan, Penumarthy Vijayalakshmi
  • Process for simultaneous alkyl esterification of oil and regeneration of spent oil purification medium
    Patent number: 6635595
    Abstract: The present invention relates to a process for the simultaneous regeneration of spent clay and insitu recovery of oil from spent clay and conversion of the same to alkyl esters of C1 to C8 carbon atoms by treating the spent clay with alcohols at elevated temperature and pressure.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: October 21, 2003
    Assignee: Council of Scientific & Industrial Research
    Inventors: Thengumpillil Narayana Balagopala Kaimal, Penumarthy Vijayalakshmi, Ayyagari Ananta Laxmi, Bandi Ramalinga
  • Process for simultaneous conversion of adsorbed oil to alkyl esters and regeneration of commercial spent bleaching earth for reuse
    Publication number: 20020115875
    Abstract: The present invention relates to a novel and simple process for the simultaneous regeneration of spent clay and insitu recovery of oil from spent clay and conversion of the same to alkyl esters of C1 to C8 carbon atoms by treating the spent clay with alcohols at elevated temperature and pressure.
    Type: Application
    Filed: February 21, 2001
    Publication date: August 22, 2002
    Inventors: Thengumpillil Narayana Balagopala Kaimal, Penumarthy Vijayalakshmi, Ayyagari Ananta Laxmi, Bandi Ramalinga
  • Process for the preparation of alkyl esters from commercial lactic acid
    Patent number: 6342626
    Abstract: The present invention relates to a catalyst-free process for the conversion of commercial lactic acid to alkyl ester of carbon C1 to C8 which comprises simultaneous hydrolysis of dimers or highpolymers of lactic acid present in commercial lactic acid to free lactic acid and esterification of free lactic acid with an alcohol in the presence of water at a temperature in the range of 130-250° C. for 4-11 hrs at a pressure of 5-25 kg/cm2, to obtain desired esters.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: January 29, 2002
    Assignee: Council of Scientific & Industrial Research
    Inventors: Thengumpillil Narayana Balagopala Kaimal, Penumarthy Vijayalakshmi, Bandi Ramalinga, Ayyagari Ananta Laxmi