Patents by Inventor Stephan Mathys Bouwens

Stephan Mathys Bouwens 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).

  • Method for the continuous production of aromatic carbonates
    Patent number: 6600061
    Abstract: The present invention provides a method for making aromatic carbonates. In this method, an aryl alcohol is reacted with a dialkyl carbonate in a reactor (e.g., a distillation column) to produce an arylalkyl carbonate and diaryl carbonate. The total yield of arylalkyl carbonate and diaryl carbonate together is at least 40%. Also, the selectivity of diaryl carbonate versus diaryl carbonate and arylalkyl carbonate together is preferably at least 25%.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: July 29, 2003
    Assignee: General Electric Company
    Inventors: Stephan Mathys Bouwens, Marcel Vieveen
  • Method for the continuous production of poly carbonates
    Patent number: 6596895
    Abstract: The present invention provides a method for making polycarbonates. One embodiment of the method comprises reacting diphenylcarbonate with a dihydric phenol. The diphenylcarbonate is made by reacting a reaction mixture comprising aryl alcohol together with a dialkyl carbonate in a reactor to produce aryl alkylcarbonate and diaryl carbonate.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: July 22, 2003
    Assignee: General Electric Company
    Inventors: Stephan Mathys Bouwens, Marcel Vieveen
  • Method for the continuous production of aromatic carbonates
    Patent number: 6596894
    Abstract: The present invention provides a method for making aromatic carbonates. In this method, an aryl alcohol is reacted with a dialkyl carbonate in a reactor (e.g., a distillation column) to produce an arylalkyl carbonate and diaryl carbonate. In one embodiment, the method comprises: feeding to the top subsection of the reactive section of a distillation column, a first stream comprising an aryl alcohol and a catalyst, and feeding to the bottom subsection of the reactive section a second stream containing a dialkylcarbonate, wherein the temperature at the bottom of the column is between 220° C. and 240° C.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: July 22, 2003
    Assignee: General Electric Company
    Inventors: Stephan Mathys Bouwens, Marcel Vieveen
  • Method for the continuous production of aromatic carbonates
    Publication number: 20020156312
    Abstract: The present invention provides a method for making aromatic carbonates. In this method, an aryl alcohol is reacted with a dialkyl carbonate in a reactor (e.g., a distillation column) to produce an arylalkyl carbonate and diaryl carbonate. In one embodiment, the method comprises: feeding to the top subsection of the reactive section of a distillation column, a first stream comprising an aryl alcohol and a catalyst, and feeding to the bottom subsection of the reactive section a second stream containing a dialkylcarbonate, wherein the temperature at the bottom of the column is between 220 °C. and 240 °C.
    Type: Application
    Filed: February 21, 2002
    Publication date: October 24, 2002
    Inventors: Stephan Mathys Bouwens, Marcel Vieveen
  • Method for the continuous production of aromatic carbonates
    Publication number: 20020107355
    Abstract: The present invention provides a method for making polycarbonates. One embodiment of the method comprises reacting diphenylcarbonate with a dihydric phenol. The diphenylcarbonate is made by reacting a reaction mixture comprising aryl alcohol together with a dialkyl carbonate in a reactor to produce aryl alkylcarbonate and diaryl carbonate.
    Type: Application
    Filed: February 21, 2002
    Publication date: August 8, 2002
    Inventors: Stephan Mathys Bouwens, Marcel Vieveen