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Method for rejuvenating pressurized fluid solvent used in cleaning a fabric article

  • US 5,772,783 A
  • Filed: 07/12/1996
  • Issued: 06/30/1998
  • Est. Priority Date: 11/09/1994
  • Status: Expired due to Term
First Claim
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1. A method of rejuvenating a pressurized fluid solvent used for cleaning a fabric article, the pressurized fluid solvent being contaminated with contaminants after cleaning the fabric article within a pressurized vessel, the method comprising the steps of:

  • cycling a primary flow of the pressurized fluid solvent from the pressurized vessel through at least one filter to remove contaminants from the pressurized fluid solvent in the primary flow, the primary flow being cycled back to the pressurized vessel after passing through the filter;

    directing a secondary flow of the pressurized fluid solvent from the pressurized vessel to an evaporator to evaporate the pressurized fluid solvent of the secondary flow into a vapor and to separate contaminants therefrom;

    liquifying the vapor of the secondary flow from the evaporator to create rejuvenated pressurized fluid solvent substantially free of contaminants; and

    redirecting the rejuvenated pressurized fluid solvent of the secondary flow to the pressurized vessel for further use.

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