Patents by Inventor Robert Perander

Robert Perander 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 of producing alkali metal phosphate
    Patent number: 5443808
    Abstract: The invention relates to a method for producing alkali metal phosphate, in particular monopotassium phosphate or its aqueous solution, by reacting fertilizer-grade phosphoric acid with alkali metal chloride at 350.degree. . . . 700.degree. C. to produce alkali metal metaphosphate, hydrolyzing thus obtained solid reaction product, removing the insoluble residue containing impurities from the hydrolysis solution in order to achieve a pure solution of alkali metal phosphate, and if further desired, crystallizing and separating the alkali metal phosphate from said aqueous solution.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: August 22, 1995
    Assignee: Kemira Oy
    Inventors: Stig-Goran A. Weckman, Robert Perander, Sakari Riihmaki