Patents by Inventor Rambabu Yadla

Rambabu Yadla 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).

  • Catalytic gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene to produce 1-chloro-2,2-difluoroethane
    Patent number: 9000242
    Abstract: The invention is directed to a catalyst for the gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene with HF to give 1-chloro-2,2-difluoroethane which catalyst is prepared by co-depositing FeCl3 and MgCl2 on chromia-alumina, or co-depositing Cr(NO3)3 and Ni(NO3)2 on active carbon, or by doping alumina with ZnCl2, and to a process for the preparation of 1-chloro-2,2-difluoroethane comprising a catalytic gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene wherein one of the catalysts according to claim 2 or 3 is used.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: April 7, 2015
    Assignee: Bayer Intellectual Property
    Inventors: Norbert Lui, Shanthan Rao Pamulaparthy, Srinivas Pvss, Thomas Vijaya, Sridhar Madabhushi, Rambabu Yadla, Narsaiah Banda, Sergii Pazenok
  • CATALYTIC GAS PHASE FLUORINATION OF 1,1,2-TRICHLOROETHANE AND/OR 1,2-DICHLOROETHENE TO PRODUCE 1-CHLORO-2,2-DIFLUOROETHANE
    Publication number: 20140330051
    Abstract: The invention is directed to a catalyst for the gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene with HF to give 1-chloro-2,2-difluoroethane which catalyst is prepared by co-depositing FeCl3 and MgCl2 on chromia-alumina, or co-depositing Cr(NO3)3 and Ni(NO3)2 on active carbon, or by doping alumina with ZnCl2, and to a process for the preparation of 1-chloro-2,2-difluoroethane comprising a catalytic gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene wherein one of the catalysts according to claim 2 or 3 is used.
    Type: Application
    Filed: October 11, 2012
    Publication date: November 6, 2014
    Applicant: BAYER INTELLECTUAL PROPERTY GMBH
    Inventors: Norbert Lui, Shanthan Rao Pamulaparthy, Srinivas Pvss, Thomas Vijaya, Sridhar Madabhushi, Rambabu Yadla, Narsaiah Banda, Sergii Pazenok
  • PROCESS FOR THE PREPARATION OF 1,1,1,2-TETRAFLUOROETHANE
    Publication number: 20110201495
    Abstract: The present invention relates to a process for preparing a co-precipated Cr2O3/Al2O3 catalyst promoted by Zinc, said process comprising co-precipatation of chromium and aluminum metal hydroxides from corresponding trivalent metal salt solutions using NH4OH, NaOH or KOH as a base and followed by calicination to give mixed oxide precatalyst in amorphous from which is impregnated with an activity promoting amount of Zinc compound.
    Type: Application
    Filed: April 27, 2011
    Publication date: August 18, 2011
    Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Jampani Madhusudana RAO, Shanthan Pamulaparthy RAO, Siva Attaluri PRASAD, Banda NARASAIAH, Narayan Sripathi REDDY, Radhakrishnan KUPPUSAMY, Vijayakumar VEERAMACHANENI, Patil Kamalakar SUKHADEORAO, Rambabu YADLA, Koosampally SRINIVAS, Leelakrishna KONDAVETI
  • Process for the preparation of 1,1,1,2-tetrafluoroethane
    Patent number: 7982074
    Abstract: The present invention relates to a process for preparing a co-precipitated Cr2O3/Al2O3 catalyst promoted by Zinc, said process comprising co-precipatation of chromium and aluminum metal hydroxides from corresponding trivalent metal salt solutions using NH4OH, NaOH or KOH as a base and followed by calcination to give mixed oxide precatalyst in amorphous from which is impregnated with an activity promoting amount of Zinc compound. The catalyst is used for the preparation of HFC-134a by fluorination of trichloroethylene and fluorination of intermediate of the former reaction (HCFC-133a).
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: July 19, 2011
    Assignee: Council of Scientific & Industrial Research
    Inventors: Jampani Madhusudana Rao, Shanthan Pamulaparthy Rao, Siva Attaluri Prasad, Banda Narasaiah, Narayan Sripathi Reddy, Radhakrishnan Kuppusamy, Vijayakumar Veeramachaneni, Patil Kamalakar Sukhadeorao, Rambabu Yadla, Koosampally Srinivas, Leelakrishna Kondaveti
  • Process for the preparation of 1,1,1,2-tetrafluoroethane
    Publication number: 20070106100
    Abstract: The present invention relates to a process for preparing a co-precipitated Cr2O3/Al2O3 catalyst promoted by Zinc, said process comprising co-precipatation of chromium and aluminum metal hydroxides from corresponding trivalent metal salt solutions using NH4OH, NaOH or KOH as a base and followed by calcination to give mixed oxide precatalyst in amorphous from which is impregnated with an activity promoting amount of Zinc compound. The catalyst is used for the preparation of HFC-134a by fluorination of trichloroethylene and fluorination of intermediate of the former reaction (HCFC-133a).
    Type: Application
    Filed: December 22, 2006
    Publication date: May 10, 2007
    Inventors: Jampani Rao, Shanthan Rao, Siva Prasad, Banda Narasaiah, Narayan Reddy, Radhakrishnan Kuppusamy, Vijayakumar Veeramachaneni, Patil Sukhadeorao, Rambabu Yadla, Koosampally Srinivas, Leelakrishna Kondaveti