Patents by Inventor Bharati D. Chheda

Bharati D. Chheda 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 preparation of tertiary alkyl primary amines
    Patent number: 9617200
    Abstract: A method for producing an amine. The first step is contacting a cyanide, an acid, water and a substrate compound capable of generating a carbonium ion by reaction with the acid to generate a first reaction intermediate. The second step is contacting the first reaction intermediate with water to form a second reaction intermediate. The third step is removing cyanide present in the second reaction intermediate to a concentration less than 10 ppm. The fourth step is contacting the second reaction intermediate with an alkali metal hydroxide to form the amine.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: April 11, 2017
    Assignees: ROHM AND HAAS COMPANY, DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Bharati D. Chheda, John G. Pendergast, Jr., Sivam Rangavajjula, Daniel M. Trauth
  • PROCESS FOR PREPARATION OF TERTIARY ALKYL PRIMARY AMINES
    Publication number: 20160060207
    Abstract: A method for producing an amine. The first step is contacting a cyanide, an acid, water and a substrate compound capable of generating a carbonium ion by reaction with the acid to generate a first reaction intermediate. The second step is contacting the first reaction intermediate with water to form a second reaction intermediate. The third step is removing cyanide present in the second reaction intermediate to a concentration less than 10 ppm.
    Type: Application
    Filed: April 2, 2014
    Publication date: March 3, 2016
    Inventors: Bharati D. Chheda, John G. Pendergast, JR., Sivam Rangavajjula, Daniel M. Trauth
  • Method for making an amine and an alkyl ester and method for reducing hydrogen cyanide levels in alkyl ester
    Patent number: 5527949
    Abstract: A method for making an amine includes the steps of heating a reaction mixture including a nitrile, an acid, water and a substrate compound capable of generating a carbonium ion by reaction with the acid to generate a first reaction intermediate; treating the first reaction intermediate with an acid in the presence of a primary alkanol to form a second reaction intermediate and an alkyl ester; separating the alkyl ester from the second reaction intermediate; and treating the second reaction intermediate with a base to form the amine.
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: June 18, 1996
    Assignee: Rohm and Haas Company
    Inventors: Sudhir K. Agarwal, Rajiv M. Banavali, Bharati D. Chheda, Samuel F. Reed, Jr.
  • Method for removing a hydrogen cyanide contaminant from an organic liquid
    Patent number: 5519162
    Abstract: A method for removing hydrogen cyanide from a hydrogen cyanide-contaminated organic liquid includes the steps of contacting the hydrogen cyanide-contaminated organic liquid with a metal alkoxide to generate a metal cyanide salt and an alkanol and then separating the organic liquid from the metal cyanide salt and the alkanol.
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: May 21, 1996
    Assignee: Rohm and Haas Company
    Inventors: Sudhir K. Agarwal, Rajiv M. Banavali, Bharati D. Chheda, Samuel F. Reed, Jr.