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公开(公告)号：JP2002174628A
公开(公告)日：2002-06-21
申请号：JP2001286866
申请日：2001-09-20
Applicant: ISCO INC
Inventor： JAMESON DANIEL GENE , ALLINGTON ROBERT WILLIAM
Abstract: PROBLEM TO BE SOLVED: To provide pressure control stabilizing a mixture of liquid and control to a composition of the liquid in a supercritical liquid system. SOLUTION: A first pump 20 delivers a first solvent to a mixer 26 via a first passage 82, and a second pump 22 delivers a second solvent to the mixer via a second passage 102. First and second transducers measure pressures inside the first and second passages and generate first and second signals proportional to the pressures. In a controller 12, each pressure signal is multiplied by a corresponding programmed 14 concentration signal, they are compared with pressures programmed in a feedback system, and error signals are generated. The controller controls delivery amounts of each pump by multiplying the concentration signals from a programmer by the error signals.
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公开(公告)号：DE69530807D1
公开(公告)日：2003-06-26
申请号：DE69530807
申请日：1995-03-02
Applicant: ISCO INC
Inventor： ALLINGTON ROBERT WILLIAM , JAMESON DANIEL GENE , DAVISON DALE A , CLAY DALE LEE , WINTER R ROBIN , TEHRANI YOOSSEF
IPC: B01D11/00 , B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F04B53/08 , F04B53/14 , F16K15/18 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/60 , G01N35/04 , G21F5/015
Abstract: The invention relates to a pumping system (12) for supercritical extraction comprising: inlet means adapted to be connected to a source of supercritical fluid; outlet means adapted to provide the pumped fluid to a pressure vessel (18 and 24A); and pumphead means (300) having a pumping chamber (336) communicating with said inlet means and with said outlet means; a piston (304); an inlet valve means controlling the flow of fluid into said pumping chamber (336) means through said inlet means; an outlet valve means controlling the flow of fluid from said pumping chamber means (336) through said outlet means; an inlet conduit means defining a flow path between said inlet valve and said pump chamber (336); and an outlet conduit means defining a flow path between said pump chamber (336) and said outlet valve means; characterized by an air-cooled thermoelectric-cooled heat exchanger means (386) for cooling both the inlet means and the pumphead means (300).
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公开(公告)号：DE69328745D1
公开(公告)日：2000-07-06
申请号：DE69328745
申请日：1993-02-22
Applicant: ISCO INC
Inventor： JAMESON DANIEL GENE , ALLINGTON ROBERT WILLIAM
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.
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公开(公告)号：DE69118032T2
公开(公告)日：1996-08-01
申请号：DE69118032
申请日：1991-07-11
Applicant: ISCO INC
Inventor： ALLINGTON ROBERT WILLIAM , WINTER ROBIN RANDALL , CLAY DALE LEE , JAMESON DANIEL GENE
IPC: F16J12/00 , B01D11/00 , B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F16K15/18 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/60 , G01N35/04 , G21F5/015
Abstract: Apparatus (10) for supercritical extraction including a source (12) of fluid at a pressure greater than the critical pressure of the said fluid; a heater (22) accepting fluid at a pressure greater than its critical pressure and heating the said fluid to a temperature greater than its critical temperature so that the said fluid becomes a supercritical fluid characterized by an openable extraction cartridge (26) having a fluid inlet passage (42), space (254) for the insertion of sample (134) and a fluid outlet passage adapted to pass supercritical fluid over or through the said sample contained within it, thereby accomplishing supercritical extraction of the sample said heating means including a recess (24) in which the cartridge (26) is placed during the said extraction, with the cartridge (26) being substantially enclosed as a result of its said placement in the recess.
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公开(公告)号：DE69412393D1
公开(公告)日：1998-09-17
申请号：DE69412393
申请日：1994-03-02
Applicant: ISCO INC
Inventor： CLAY DALE LEE , ALLINGTON ROBERT WILLIAM , LIESCHESKI PHILLIP BEARNARD , WINTER ROBIN RANDALL , JAMESON DANIEL GENE
IPC: B01D11/00 , B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F16K15/18 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/60 , G01N35/04 , G21F5/015
Abstract: To supply supercritical fluid to an automatic supercritical fluid extractor and collect extract from the extractor, sample holding cartridges are lifted one by one in series by an elevator plug into a pressure chamber. An inlet at the top of the cartridge engages a pressure vessel inlet for the extractant so that extractant flows into the cartridge and into the space between the cartridge and inner walls of the pressure chamber. The outlets from the cartridge and pressure vessel communicate with the collector and exhaust through passageways in the plug. The plug has cleaning ports for cleaning seals and the outlet from the cartridge flows past the seals. The collector lifts vials into place and can precool the collection solvent, and later as part of the collection procedure, heat and pressurize the collector.
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Patent Agency Ranking
公开(公告)号：DE69306910T2
公开(公告)日：1997-05-07
申请号：DE69306910
申请日：1993-10-18
Applicant: ISCO INC
Inventor： WINTER ROBIN RANDALL , JAMESON DANIEL GENE , ALLINGTON ROBERT WILLIAM , CLAY DALE LEE
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公开(公告)号：DE69133114T2
公开(公告)日：2003-05-28
申请号：DE69133114
申请日：1991-07-11
Applicant: ISCO INC
Inventor： ALLINGTON ROBERT WILLIAM , WINTER ROBIN RANDALL , CLAY DALE LEE , JAMESON DANIEL GENE
IPC: F16J12/00 , B01D11/00 , B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F16K15/18 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/60 , G01N35/04 , G21F5/015
Abstract: Apparatus (10) for supercritical extraction including a source (12) of fluid at a pressure greater than the critical pressure of the said fluid; a heater (22) accepting fluid at a pressure greater than its critical pressure and heating the said fluid to a temperature greater than its critical temperature so that the said fluid becomes a supercritical fluid characterized by an openable extraction cartridge (26) having a fluid inlet passage (42), space (254) for the insertion of sample (134) and a fluid outlet passage adapted to pass supercritical fluid over or through the said sample contained within it, thereby accomplishing supercritical extraction of the sample said heating means including a recess (24) in which the cartridge (26) is placed during the said extraction, with the cartridge (26) being substantially enclosed as a result of its said placement in the recess.
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公开(公告)号：DE69228979D1
公开(公告)日：1999-05-27
申请号：DE69228979
申请日：1992-10-23
Applicant: ISCO INC
Inventor： CLAY DALE LEE , JAMESON DANIEL GENE , ALLINGTON ROBERT WILLIAM , WINTER ROBIN RANDALL
IPC: B01D11/00 , B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F16K15/18 , G01F1/34 , G01N1/10 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/60 , G01N35/04 , G21F5/015 , G01T7/02 , G01N1/28
Abstract: An apparatus for supercritical fluid extraction incorporates a removable extraction cartridge which in operation has insignificant pressure difference between its inside and outside walls. Because of the low pressure difference, the extraction cartridge need not have the strength to withstand significant pressure and can be made out of molded plastic for disposable use as well as stainless steel and/or machined plastic for reusability. The extraction cartridge can be removed and opened for sample access without the use of tools. The outside of the cartridge can be purged after it is installed in a heated high pressure vessel to remove contamination from its exterior. In one embodiment, the extractor includes a fraction collector for extractants, an automatic sample changer and an automatic cartridge transfer mechanism which provide completely automated extractions.
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公开(公告)号：DE69224430T2
公开(公告)日：1998-06-04
申请号：DE69224430
申请日：1992-11-04
Applicant: ISCO INC
Inventor： WINTER ROBIN RANDALL , JAMESON DANIEL GENE , ALLINGTON ROBERT WILLIAM , CLAY DALE LEE
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公开(公告)号：DE69118032D1
公开(公告)日：1996-04-25
申请号：DE69118032
申请日：1991-07-11
Applicant: ISCO INC
Inventor： ALLINGTON ROBERT WILLIAM , WINTER ROBIN RANDALL , CLAY DALE LEE , JAMESON DANIEL GENE
IPC: F16J12/00 , B01D11/00 , B01D11/02 , B01D11/04 , F04B9/04 , F04B15/08 , F04B49/06 , F16K15/18 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/60 , G01N35/04 , G21F5/015
Abstract: Apparatus (10) for supercritical extraction including a source (12) of fluid at a pressure greater than the critical pressure of the said fluid; a heater (22) accepting fluid at a pressure greater than its critical pressure and heating the said fluid to a temperature greater than its critical temperature so that the said fluid becomes a supercritical fluid characterized by an openable extraction cartridge (26) having a fluid inlet passage (42), space (254) for the insertion of sample (134) and a fluid outlet passage adapted to pass supercritical fluid over or through the said sample contained within it, thereby accomplishing supercritical extraction of the sample said heating means including a recess (24) in which the cartridge (26) is placed during the said extraction, with the cartridge (26) being substantially enclosed as a result of its said placement in the recess.
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