Patents by Inventor John Dixon-Hall

John Dixon-Hall 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 removing acetone from a mixture of acetone, methyl, acetate and methyl iodide
    Patent number: 5262014
    Abstract: A process for removing acetone from an acetone/methyl acetate/methyl iodide mixture utilizing extractive distillation with water being introduced to the distillation zone above the point of introduction of the mixture and acetic acid being introduced at or above the point of introduction of the mixture. In a preferred embodiment the mixture is subjected to an initial extraction with an aqueous extractant to remove most of the methyl iodide.The process is particularly applicable to removing acetone by-product in carbonylation processes for the production of acetic anhydride.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: November 16, 1993
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Jeremy B. Cooper, John Dixon-Hall, Stephen J. Smith