Patents by Inventor Joseph L. Bush

Joseph L. Bush 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).

  • Patent number: 5283046
    Abstract: Aqueous co-product, produced by distillation of reaction filtrate from a batch reaction for manufacturing sodium dithionite by reacting sodium formate, sodium hydroxide, and sulfur dioxide in aqueous methanol solution, is rapidly evaporated to remove about 80% of its water content, so that only the determined quantity of water remains with its determined contents of alkali metal compounds, and is utilized as an admixed component of a succeeding batch.
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: February 1, 1994
    Assignee: Hoechst Celanese Corporation
    Inventors: Charles E. Winslow, Jr., Joseph L. Bush, Leonard C. Ellis
  • Patent number: 5034210
    Abstract: Vent gas from the condenser-scrubber system of a reactor, in which dithionites are made by reacting a formate, sulfur dioxide, and an alkali in aqueous methanol, is reduced in its ethylene oxide content to less than 10 ppm maintaining the ratio of sulfur dioxide to ethylene oxide entering the scrubber to greater than 1.0, preferably greater than 2.5, and most preferably greater than 3.0 and at a temperature of -20.degree. C. to 0.degree. C.
    Type: Grant
    Filed: May 18, 1990
    Date of Patent: July 23, 1991
    Assignee: Hoechst Celanese Corporation
    Inventors: Charles E. Winslow, Jr., Joseph L. Bush
  • Patent number: 4973471
    Abstract: There is disclosed a method for the production of dust-free sodium dithionite from the reaction of a alkaline formate sulfur dioxide and an alkaline metal agent in the presence of a thiosulfate reactive compound by introducing a water-soluble polymer having a molecular weight less than 60,000 and delaying the start of the alkaline metal agent until the sodium formate and the sulfur dioxide have begun to be introduced into the reactor.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: November 27, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Joseph L. Bush, Charles E. Winslow
  • Patent number: 4622216
    Abstract: A method is taught for increasing the yield of anhydrous sodium dithionite by adding an organic compound that is thiosulfate reactive to a batch reactor containing a puddle solution of methanol and fed with formic acid or an alkali formate as a first feed, an aqueous alkali compound as a second feed, an aqueous alkali formate solution as a third feed, and a methanolic SO.sub.2 solution as a fourth feed. This organic compound may be added prior to, combined with, or concurrently with one of the four feeds to the reactor. Preferably, it is added concurrently with the third feed and throughout the entire course of the reaction, ending with the beginning of the cooling period. A suitable addition rate is 0.4-0.6 wt. %/minute, preferably 0.5 wt. %/minute. All of the organic compound is consumed, and at least a portion of the thiosulfate ion is destroyed.
    Type: Grant
    Filed: August 6, 1985
    Date of Patent: November 11, 1986
    Assignee: Virginia Chemicals, Inc.
    Inventors: Charles E. Winslow, Jr., Joseph L. Bush, Daniel D. Dickens