Title:
液体流通システムへ溶媒を供給する方法
Document Type and Number:
Japanese Patent JP3588071
Kind Code:
B2
Abstract:
To control a solvent composition in a supercritical fluid system, a first pump pumps a first solvent through a first conduit into a mixer and a second pump pumps a second solvent through a second conduit into the mixer. First and second transducers measure the pressure in the first and second conduits and generate first and second signals proportional to the pressures. Each pressure signal is multiplied by a corresponding programmed concentration signal and compared to the programmed pressure in a feedback system to generate an error signal. The error signal is multiplied by concentration signals from a programmer to control the pumping rate of each pump. The pumps pressurize each fluid one at a time at the start of a run. The pressurization process is also used for producing disturbance-free flow as delivery is changed from one pump to another during prolonged runs.
Inventors:
Daniel Jean Jameson
Robert William Allington
Robert William Allington
Application Number:
JP2001286866A
Publication Date:
November 10, 2004
Filing Date:
September 20, 2001
Export Citation:
Assignee:
ISCO INCORPORATED
International Classes:
G01N30/02; G01N30/32; G01N30/34; G05D11/13; G05D16/20; G01N1/00; (IPC1-7): G01N30/02; G01N1/00; G01N30/32; G05D16/20
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hideo Tanaka
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hideo Tanaka