Patents by Inventor Andrew M. Sandre

Andrew M. Sandre 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: 4263052
    Abstract: A process for obtaining fructose solutions or solid fructose, a raw material containing sucrose and/or similar fructofuranosides is hydrolyzed to fructose and glucose and treated with a calcium base (e.g. calcium oxide or hydroxide) to precipitate calcium-sugar complexes. The precipitate is slurried in water and then treated with phosphoric acid to liberate (e.g. at a pH of 5.5 to 9) a fructose solution of high purity (i.e. de-complex the calcium-fructose complex), with precipitation of useful calcium phosphate salts. Phosphoric acid has been found to have significant advantages over carbonic acid or carbon dioxide as the fructose-liberating (de-complexing) agent, e.g. better yields and more useful by-products. Solid fructose can be obtained from the fructose solution in a known manner. The filtrate from the calcium-sugar complexing step can be acidified to yield stable, useful, fructose-depleted by-products.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: April 21, 1981
    Assignee: American Crystal Sugar Company
    Inventors: Stanley E. Bichsel, Yueh Wang, Andrew M. Sandre