Patents Examined by Wilson Bascomb
  • Process for obtaining trioxane from aqueous solutions by high-pressure extraction
    Patent number: 4946561
    Abstract: The invention relates to a process for obtaining trioxane from aqueous solutions by high-pressure extraction using an extracting agent which is in the form either of a gas in the supercritical state or of a liquid gas. An intermediate separation is advantageous, especially in the former case.The trioxane can be obtained in high concentration and with a saving of energy by the process according to the invention.
    Type: Grant
    Filed: June 6, 1985
    Date of Patent: August 7, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gero Braun, Karlheinz Burg, Karl-Friedrich Muck