Patents by Inventor Avani M. Patel

Avani M. Patel 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 preparing choline hydroxide from trimethylamine and ethylene oxide
    Patent number: 9353045
    Abstract: Processes for preparing N,N,N-trimethylethanolammonium hydroxide (choline hydroxide) and the choline hydroxide produced are described. These processes minimize the production of byproduct mono-ethoxylated and di-ethyoxylated choline in the product choline hydroxide. The processes generally include feeding ethylene oxide, trimethylamine, and water into a first reactor to create a first reactor product under temperature controlled conditions. The product of the first reactor is fed into a second reactor to form a second reactor product under uncontrolled, adiabatic, conditions. Finally, any unreacted trimethylamine in the second reactor product is removed to form a final product comprising choline hydroxide. Additional reactors can be used for the ethylene oxide and trimethylamine reaction.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: May 31, 2016
    Assignee: Dow AgroSciences LLC
    Inventors: Ruokang Li, Ravindra S. Dixit, Avani M. Patel, Xiaoyun Chen, Randy J. Pell, John G. Pendergast, Jr.
  • Isothermal multitube reactors and processes incorporating the same
    Patent number: 8558041
    Abstract: The present invention provides isothermal multitube reactors suitable for the production of chlorinated and/or fluorinated propene and higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes. The reactors utilize a feed mixture inlet temperature at least 20° C. different from a desired reaction temperature.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: October 15, 2013
    Assignee: Dow Global Technologies, LLC
    Inventors: Max M. Tirtowidjojo, Hua Bai, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt F. Hirsekorn, Manfred Kokott, William J. Kruper, Jr., Thomas U. Luebbe, Avani M. Patel, Shirley S. Sexton, Peter Wenzel, Marcus Wobser
  • Process for recovering brominated butadiene polymers from solution
    Patent number: 8058389
    Abstract: Brominated polybutadiene polymers are recovered from a bromination reaction solution by forming the solution into droplets, thermally stripping the solvent from the droplets, and then washing the resulting particles. The washed particles are then recovered from the washing liquid. The droplets can be dispersed into a gaseous medium such as air and then transferred into a nonsolvent liquid for washing, or can be formed directly into the nonsolvent liquid. The process forms a particulate polymer material that is easily filterable and has low levels of volatile impurities and inorganic salts. Brominated polybutadiene polymers recovered in this manner are often very thermally stable.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: November 15, 2011
    Assignee: Dow Global Technologies LLC.
    Inventors: Ronald B. Leng, Avani M. Patel, Brian D. Scherzer, Derrick G. Wetters, Douglas C. Greminger
  • ISOTHERMAL MULTITUBE REACTORS AND PROCESSES INCORPORATING THE SAME
    Publication number: 20110087054
    Abstract: The present invention provides isothermal multitube reactors suitable for the production of chlorinated and/or fluorinated propene and higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes. The reactors utilize a feed mixture inlet temperature at least 20° C. different from a desired reaction temperature.
    Type: Application
    Filed: October 8, 2010
    Publication date: April 14, 2011
    Applicant: DOW GLOBAL TECHNOLOGIES
    Inventors: Max M. Tirtowidjojo, Hua Bai, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt F. Hirsekorn, Manfred Kokott, William J. Kruper, JR., Thomas U. Luebbe, Avani M. Patel, Shirley S. Sexton, Peter Wenzel, Marcus Wobser
  • Process for Recovering Brominated Butadiene Polymers from Solution
    Publication number: 20090008236
    Abstract: Brominated polybutadiene polymers are recovered from a bromination reaction solution by forming the solution into droplets, thermally stripping the solvent from the droplets, and then washing the resulting particles. The washed particles are then recovered from the washing liquid. The droplets can be dispersed into a gaseous medium such as air and then transferred into a nonsolvent liquid for washing, or can be formed directly into the nonsolvent liquid. The process forms a particulate polymer material that is easily filterable and has low levels of volatile impurities and inorganic salts. Brominated polybutadiene polymers recovered in this manner are often very thermally stable.
    Type: Application
    Filed: June 26, 2008
    Publication date: January 8, 2009
    Inventors: Ronald B. Leng, Avani M. Patel, Brian D. Scherzer, Derrick G. Wetters, Douglas C. Greminger
  • Process for preparing hydrogenated aromatic polymers
    Patent number: 6455656
    Abstract: The present invention is directed to a process for producing a hydrogenated polymer or copolymer by hydrogenating prior to polymer isolation or finishing.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: September 24, 2002
    Assignee: Dow Global Technologies Inc.
    Inventors: Jerry L. Hahnfeld, Thomas H. Newman, Avani M. Patel
  • Process for preparing hydrogenated aromatic polymers
    Publication number: 20010051691
    Abstract: The present invention is directed to a process for producing a hydrogenated polymer or copolymer by hydrogenating prior to polymer isolation or finishing.
    Type: Application
    Filed: February 26, 2001
    Publication date: December 13, 2001
    Inventors: Jerry L. Hahnfeld, Avani M. Patel, Thomas H. Newman