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Automatic conversion between SFC and HPLC

A converter and mode technology, applied in the direction of machines/engines, chemical instruments and methods, separation methods, etc., can solve problems such as changing flow, and achieve the effect of improving SFC technology

Inactive Publication Date: 2014-01-15
AGILENT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general HPLC separations have a constant total flow rate (flow rate), but some methods also vary the flow during the separation

Method used

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  • Automatic conversion between SFC and HPLC
  • Automatic conversion between SFC and HPLC
  • Automatic conversion between SFC and HPLC

Examples

Experimental program
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Embodiment Construction

[0073] refer to Figure 7 , shows a schematic diagram of a preferred embodiment of the invention. Booster pump 70 receives compressible fluid from reservoir 72 . An optional prechiller 74 cools the compressible fluid input stream and also the pump head of the booster pump 70 . Booster pump 70 delivers flow to an output flow path that includes optional pulsation dampener 76 , booster pressure sensor 78 , and thermal conditioning device 80 . Metering pump 82 receives the output flow of booster pump 70 and delivers flow through optional temperature sensor 84 and process pressure sensor 86 to process flow stream 88 . Controller 90 receives sensor signals from pressure sensor 78 , pressure sensor 86 , and optional temperature sensor 84 . Controller 90 further controls optional thermal zones of device 74 and device 80 and controls the pumping speed of booster pump 70 . Optionally, controller 90 also controls the metering speed of metering pump 82, although this is not required f...

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Abstract

An apparatus and a system for converting a standard, high performance liquid chromatography (HPLC) flow path to a flow path suitable for supercritical fluid chromatography (SFC) are described. This reversible technique is applied to a variety of flow configurations including binary, high pressure solvent mixing systems and quaternary, low pressure solvent mixing systems than can be conventionally operated or automated. The technique is generally applied to the fields of supercritical fluid chromatography and high pressure liquid chromatography, but users skilled in the art will find utility for any flow system where pressurization components must be periodically applied to and removed from both ends of a flow stream in an automated manner.

Description

[0001] priority statement [0002] This application is a continuation-in-part of US Patent Application 12 / 230,875, filed September 5, 2008, entitled "Compressible Fluid Pumping System for Dynamically Compensating Compressible Fluids Over a Wide Range of Pressures." technical field [0003] The present invention relates to methods and systems for pumping compressible fluids. More specifically it relates to pumping compressible fluids in high pressure applications. Background technique [0004] Pumping in industry takes many forms, all of which have the general requirement of moving fluids or slurries through process streams. Pumps are selected based on application requirements including head pressure, metering accuracy, temperature, particle tolerance, fluid viscosity, cost, safety, service rate, and a variety of other parameters. Pumps can generally be divided into two categories. Positive displacement pumps divide the working fluid into discrete volumes and force them t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/36
CPCB01D15/40F04B23/10G01N30/20G01N30/26G01N30/32
Inventor 埃德温·E·维克福什金伯·D·福格尔曼特里·A·伯格
Owner AGILENT TECH INC
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