Patents Assigned to Technichem Engineering, Ltd.
  • Halohydrocarbon recovery process
    Patent number: 5837106
    Abstract: A halohydrocarbon solvent recovery process. The process in one embodiment included heating a gross mixture including solvent, fatty-acid impurities and water in a bath to vaporize at least a portion of the solvent and the impurities. A portion of the vapor is then condensed in a reflux condenser to form a condensate mixture. After drying and impurity adsorption, a solvent product of at least 99% purity may be recovered. In one embodiment, the gross mixture is obtained from steam stripping dry-cleaner filter cartridges.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: November 17, 1998
    Assignee: Technichem Engineering, Ltd.
    Inventors: Mark J. Ng, Bruce T. Maeda
  • Halohydrocarbon recovery process
    Patent number: 5374337
    Abstract: A halohydrocarbon solvent recovery process. The process in one embodiment includes heating a gross mixture including solvent, fatty-acid impurities and water in a bath to vaporize at least a portion of the solvent and the impurities. A portion of the vapor is then condensed in a reflux condenser to form a condensate mixture. After drying and impurity absorption, a solvent product of at least 99% purity may be recovered. In one embodiment, the gross mixture is obtained from steam stripping dry-cleaner filter cartridges.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: December 20, 1994
    Assignee: Technichem Engineering, Ltd.
    Inventors: Mark J. Ng, Bruce T. Maeda