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1.发明公开
公开(公告)号：EP0662013A1
公开(公告)日：1995-07-12
申请号：EP94922707.0
申请日：1994-07-20
申请人： ISCO, Inc.
CPC分类号： B01D11/0203 , B01D11/0407 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/32 , G01N30/60 , G01N30/82 , G01N2030/6008 , G01N2030/6013 , B01D15/40
摘要： A variable-orifice fluid restrictor (11) for use with a supercritical extractor or chromatograph includes an inlet line for fluid at a pressure above its critical pressure, an extended tubular probe having an inner and an outer surface and a proximal and a distal end. The proximal end of the probe is disposed toward the inlet line. The distal end of the probe includes an adjustable orifice means (1240) adapted for metering the fluid and having first and second orifice members and an adjusting stem having first and second ends. The adjustable orifice means (1240) is adjacent to the outer surface of the probe and the orifice means (1240) is adjustable with the adjusting stem. The end of the stem is located at the distal end of the probe and is adapted for moving the first orifice member with respect to the second orifice member to control the adjustable orifice (1240) for varying the restriction of the fluid passing through the adjustable orifice (1240).
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公开(公告)号：EP0639098B1
公开(公告)日：1998-08-12
申请号：EP94911445.8
申请日：1994-03-02
申请人： ISCO, Inc.
IPC分类号： B01D11/00
CPC分类号： G21F5/015 , B01D11/0203 , B01D11/0407 , F04B9/042 , F04B15/08 , F04B49/065 , F04B2205/03 , F04B2205/05 , F04B2205/09 , F05B2230/41 , F05C2201/0493 , F05C2253/12 , F16K15/183 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N2001/4033 , G01N2001/4061 , G01N2030/6013 , G01N2035/0441 , B01D15/40
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公开(公告)号：EP0644791A1
公开(公告)日：1995-03-29
申请号：EP94910643.0
申请日：1994-03-02
申请人： ISCO, Inc.
CPC分类号： F04B9/042 , B01D11/0203 , B01D11/0407 , F04B15/08 , F04B49/065 , F04B2205/03 , F04B2205/05 , F04B2205/09 , F05B2230/41 , F05C2201/0493 , F05C2253/12 , F16K15/183 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N2001/4033 , G01N2001/4061 , G01N2030/6013 , G01N2035/0441 , G21F5/015 , B01D15/40
摘要： To collect analyte in a supercritical fluid extraction process, the extractant flows to a collection container (130) under pressure. In one embodiment, the collection container (130) contains collection solvent (144) through which the extractant flows to partition analyte. The extractant adds to the liquid and when the collection solvent-extractant mixture rises to a heating zone, the extractant vaporizes selectively since its vapor pressure is higher than the vapor pressure of the collection solvent (144). When its pressure exceeds a preset valve (148) pressure it is vented so that extractant continually leaves the collection container (130). After the extraction is complete, the analyte is concentrated in the collection solvent (144). In another embodiment, the collection vessel includes a solid material on which the analyte collects. It is removed under pressure by a solvent that is concentrated under pressure.
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4.发明授权
公开(公告)号：EP0662013B1
公开(公告)日：1999-05-19
申请号：EP94922707.8
申请日：1994-07-20
申请人： ISCO, Inc.
CPC分类号： B01D11/0203 , B01D11/0407 , G01N1/40 , G01N30/02 , G01N30/28 , G01N30/32 , G01N30/60 , G01N30/82 , G01N2030/6008 , G01N2030/6013 , B01D15/40
摘要： A variable-orifice fluid restrictor (11) for use with a supercritical extractor or chromatograph includes an inlet line for fluid at a pressure above its critical pressure, an extended tubular probe having an inner and an outer surface and a proximal and a distal end. The proximal end of the probe is disposed toward the inlet line. The distal end of the probe includes an adjustable orifice means (1240) adapted for metering the fluid and having first and second orifice members and an adjusting stem having first and second ends. The adjustable orifice means (1240) is adjacent to the outer surface of the probe and the orifice means (1240) is adjustable with the adjusting stem. The end of the stem is located at the distal end of the probe and is adapted for moving the first orifice member with respect to the second orifice member to control the adjustable orifice (1240) for varying the restriction of the fluid passing through the adjustable orifice (1240).
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公开(公告)号：EP0639098A1
公开(公告)日：1995-02-22
申请号：EP94911445.0
申请日：1994-03-02
申请人： ISCO, Inc.
CPC分类号： G21F5/015 , B01D11/0203 , B01D11/0407 , F04B9/042 , F04B15/08 , F04B49/065 , F04B2205/03 , F04B2205/05 , F04B2205/09 , F05B2230/41 , F05C2201/0493 , F05C2253/12 , F16K15/183 , G01F1/34 , G01N1/34 , G01N1/40 , G01N30/02 , G01N30/28 , G01N2001/4033 , G01N2001/4061 , G01N2030/6013 , G01N2035/0441 , B01D15/40
摘要： To avoid deposits on the restrictor that channels extractant into a collector (1901), a heated capillary tube (1900) pressure release restrictor has a thermally insulated outlet end in a collecting trap (1908) substantially colder than the capillary tube (1900). The restrictor is heated between the insulation (1906) and the capillary tube (1908) by Joulean heating. The solvent in the trap (1908) is at a pressure of 5 to 200 psi above atmospheric pressure. The thermal resistance of the insulation (1906) is selected to reduce the heat added to the extractant to a minimum, to keep the extractant from freezing, and to reduce partitioning of the extract and extractant. It has a thermal conductivity no greater than 60 BTU's per hour, per square foot, per inch for a one degree Fahrenheit difference.
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