Patents by Inventor Steve Edward Brewer

Steve Edward Brewer 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).

  • Integrated process for the production of 2, 6-naphthalene dicarboxylic acid
    Patent number: 6448436
    Abstract: Disclosed is an integrated process for producing 2,6-naphthalene dicarboxylicacid comprising oxidizing a methylnaphthalene feedstock, hydrodebrominating the crude naphthoic acid product under conditions different from any work known in the art, forming a potassium salt of the acid; disproportionating the potassium salt to produce 2,6 potassium salts of NDA; selectively precipitating K2NDA; selectively precipitating the monopotassium salt of 2,6 NDA(KHNDA); disproportionating the KHNDA into 2,6 NDA and K2NDA; further reacting the 2,6 NDA in a pipe reactor; and drying the product 2,6 NDA by conventional means or directly slurrying directly into a PEN process. The process can tolerate impurities in the economical methylnaphthalene feed and the resulting 2,6 NDA is of high quality with <50 ppm potassium.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: September 10, 2002
    Assignee: Mossi & Ghisolfi Overseas, S. A.
    Inventors: Keith Michael Kreitman, Steve Edward Brewer, John Bernard Rodden, Robert Lawrence Blackbourn, Thomas Fairchild Brownscombe, James Laurel Buechele, Ye-Mon Chen, Zaida Diaz, Donn Anthony DuBois, Raymond Lawrence June, Brendan Dermot Murray, Michael Wayne Potter