Converting a pump for use in supercritical fluid chromatography

CAFC
  • US 6,561,767 B2
  • Filed: 08/01/2001
  • Issued: 05/13/2003
  • Est. Priority Date: 08/01/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for converting a pump for use in a combined flow stream containing a mixture of highly compressed gas, compressible liquid or supercritical fluid;

  • and a relatively incompressible liquid, comprising;

    controlling pressure of a first flow stream containing a highly compressed gas, compressible liquid, or supercritical fluid, by maintaining an elevated pressure rate after said outlet of said pump but prior to joining a second flow stream of a relatively incompressible liquid;

    pumping of said first flow stream consisting of a pure fluid resulting in delivery of a controllable flow rate of said first flow stream at a constant compressibility compensation without the need for dynamically compensating said pump for compressibility changes in said first flow stream.

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