Patents by Inventor Thella Prathap Kumar

Thella Prathap Kumar 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).

  • Selective liquid phase air oxidation of toluene catalysed by composite catalytic system
    Patent number: 6743952
    Abstract: The present invention provides an improved process for the production of benzaldehyde with 40-50% selectivity by the catalytic liquid phase air oxidation of toluene using a composite catalytic system comprising salts of iron, cobalt, manganese, molybdenum or nickel as recyclable catalyst, salts of manganese or copper as recyclable co-catalyst and cobalt bromide, sodium bromide, sodium chloride and zinc bromide as promoter.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: June 1, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Mannepalli Lakshmi Kantham, Pentlavalli Sreekanth, Kottapalli Koteshwara Rao, Thella Prathap Kumar, Bhavnari Purna C. Rao, Boyapati Manoranjan Choudary
  • Selective liquid phase air oxidation of toluene catalysed by composite catalytic system
    Publication number: 20030187304
    Abstract: The present invention provides an improved process for the production of benzaldehyde with 40-50% selectivity by the catalytic liquid phase air oxidation of toluene using a composite catalytic system comprising salts of iron, cobalt, manganese, molybdenum or nickel as recyclable catalyst, salts of manganese or copper as recyclable co-catalyst and cobalt bromide, sodium bromide, sodium chloride and zinc bromide as promoter.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 2, 2003
    Inventors: Mannepalli Lakshmi Kantham, Pentlavalli Sreekanth, Kottapalli Koteshwara Rao, Thella Prathap Kumar, Bhavnari Purna C. Rao, Boyapati Manoranjan Choudary
  • Process for the production of benzaldehyde by the catalytic liquid phase air oxidation of toluene
    Patent number: 6495726
    Abstract: The present invention relates to an improved process for the production of benzaldehyde with 40-50% selectivity comprising by catalytic liquid phase air oxidation of toluene. The process involves providing a continuous flow of air in the presence of a catalyst such as salts of Fe, Co, Mo and Ni, and preferably a co-catalyst such as salts of manganese or copper, a promoter which may also be a bromine source, and a carboxylic acid solvent selected from the group consisting of acetic, propionic, benzoic acids ranging between 0.05 to 0.3 wt. times with respect to toluene, at a temperature ranging between 60-130° C. and pressures in the range of 1-10 bars for a period of 0.5-1.5 hours to obtain benzaldehyde (40-50%) along with other by-products.
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: December 17, 2002
    Assignee: Council of Scientific and Industrial Research
    Inventors: Mannepalli Lakshmi Kantam, Boyapati Manoranjan Choudary, Pentlavally Sreekanth, Kottapalli Koteswara Rao, Kantarao Naik, Thella Prathap Kumar, Asad Ali Khan