[특허]Decoupled flow and pressure setpoints in an extraction instrument using compressible fluids

Decoupled flow and pressure setpoints in an extraction instrument using compressible fluids 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-015/08
출원번호	US-0013899 (1993-02-05)
발명자 / 주소	Frank Lenore R. (Landenberg PA) Wurm Christopher M. (Landenberg PA) Dryden Paul C. (West Chester PA) Engel Steven J. (Kennett Square PA) Nickerson Mark A. (Landenberg PA) Zerenner Ernest H. (Wilmingt
출원인 / 주소	Hewlett-Packard Company (Palo Alto CA 02)
인용정보	피인용 횟수 : 43 인용 특허 : 0

초록 ▼

Methods and apparatus for extracting sample components from complex matrices using supercritical fluid as the principal extracting solvent are disclosed. The invention takes advantage of the fact that the solvent power of a supercritical fluid is stepwise settable by the parameters of density, modifier concentration, and temperature. Accordingly, methods and apparatus for extracting a component from a sample using fluid flow system having a variable and controllable flow restriction are disclosed. The methods of the present invention comprise the steps of inserting the sample into the sample container section, inputting temperature, pressure, flow rate and extraction time set points. Flow rate is controlled and system pressure regulated by the variable flow restriction. The output stream from the extraction is then expanded through a nozzle and into a trap. In certain embodiments, the trap is filled with chemically active packing material. In other embodiments, a fractionation zone and other analytical instruments are coupled to the apparatus of the present invention. Methods and apparatus for rinsing the extraction instrument and for diluting the extraction fluid are also disclosed. Methods for operating a supercritical fluid extraction systems comprising a pressure and thermal control systems which are programmable to regulate the system to maintain such values within the design specifications during the extraction process.

대표청구항 ▼

A method of extracting a component from a sample using fluid flow system apparatus comprising control apparatus, at least one element having a variable and controllable flow restriction and a sample container section, comprising the steps of: inserting the sample into the sample container section; inputting temperature, pressure, flow rate and extraction time setpoints into control apparatus; providing pressurized fluid; directing the fluid to a pump which injects the fluid into the flow system apparatus as a supercritical fluid at the input flow rate setpoint; sensing system pressure as fluid is pumped into the system; controlling the variable flow restriction to achieve and to maintain the setpoint pressure and achieve a degree of decoupling of flow and pressure; directing fluid through the sample at the setpoint flow rate; and directing fluid mixture leaving the sample container section to an expansion nozzle section and flowing extraction fluid into a trap.

이 특허를 인용한 특허 (43)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Decoupled flow and pressure setpoints in an extraction instrument using compressible fluids 원문보기

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Decoupled flow and pressure setpoints in an extraction instrument using compressible fluids 원문보기

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