Patents by Inventor Venkata Narayana Kalevaru

Venkata Narayana Kalevaru 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).

  • DIRECT HYDROXYLATION OF BENZENE TO PHENOL
    Publication number: 20210009492
    Abstract: The invention provides a method for preparing phenols from aromatic compounds, particularly a method of preparing phenol by direct hydroxylation of benzene. The method comprises contacting benzene with nitrous oxide in the presence of a bimetallic zeolite catalyst at an ambient pressure and a reaction temperature ranging from (about) 320° C. to 440° C.
    Type: Application
    Filed: January 17, 2017
    Publication date: January 14, 2021
    Applicants: The King Abdulaziz City for Science and Technology, Leibniz Institute for Catalysis at the University of Rostock (LIKAT)
    Inventors: Mansour Shuleiweeh Alotaibi, Venkata Narayana Kalevaru, Andreas Martin, Mohammed Alkinany, Hamid A Al-Megren
  • METHOD OF MAKING ADIPIC ACID USING NANO CATALYST
    Publication number: 20140179950
    Abstract: A method for direct synthesis of adipic acid (AA) adopting green catalytic oxidation route of cyclohexane (CH) using the bimetallic catalysts is described. The reaction to convert CH into AA in the presence of bimetallic catalyst is carried in an autoclave in the temperature range of 25 to 300° C. The CH conversion was over 21% with AA selectivity of 34% and ca. 63% selectivity of cyclohexanone and cyclohexanol together over Au—Pd/TiO2 bimetallic catalyst.
    Type: Application
    Filed: March 3, 2014
    Publication date: June 26, 2014
    Applicant: King Abdulaziz City for Science and Technology (KACST)
    Inventors: Ahmad S. ALSHAMMARI, Abdulaziz A. BAGABAS, Angela KÖCKRITZ, Venkata Narayana KALEVARU, Andreas MARTIN
  • METHOD OF MAKING AND USING NANO-BIMETALLIC CATALYST TO PRODUCE ADIPIC ACID
    Publication number: 20130296604
    Abstract: A bimetallic catalyst supported on a transition metal oxide is described. A method to make and use the bimetallic catalyst is also described. A method for preparing supported bimetallic catalysts of coinage group metal and a combination of a coinage group metal and a platinum metal group is described. A method for direct synthesis of adipic acid (AA) adopting green catalytic oxidation route of cyclohexane (CH) using the bimetallic catalysts is described. The reaction to convert CH into AA in the presence of bimetallic catalyst is carried in an autoclave in the temperature range of 25 to 300° C. The CH conversion was over 21% with AA selectivity of 34% and ca. 63% selectivity of cyclohexanone and cyclohexanol together over Au—Pd/TiO2 bimetallic catalyst.
    Type: Application
    Filed: May 4, 2012
    Publication date: November 7, 2013
    Applicant: King Absulaziz City for Science and Technology (KACST)
    Inventors: Ahmad S. ALSHAMMARI, Abdulaziz A. BAGABAS, Angela KÖCKRITZ, Venkata Narayana KALEVARU, Andreas MARTIN
  • Method for the preparation of halogenated benzonitriles
    Patent number: 7576233
    Abstract: The present invention relates to a method for preparing halogenated benzonitriles by vapor phase ammoxidation at a reaction temperature in the range of 300 to 500° C. in a fixed bed reactor using a three-component catalyst. More particularly, the method of the invention relates to a method for preparing 2,6-dichlorobenzonitrile (2,6-DCBN) from 2,6-dichlorotoluene (2,6-DCT) by vapor phase ammoxidation. The invention also relates to a three-component catalyst provided on a carrier and its use in a vapor phase ammoxidation reaction according to the invention. In addition, the invention provides a method for preparing the three-component catalyst.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: August 18, 2009
    Assignee: Tessenderlo Chemie S.A.
    Inventors: Andreas Martin, Venkata Narayana Kalevaru, Bernhard Lücke, Dirk Van Deynse, Marc Belmans, Frank Boers