Pressing solvent extraction device for absorbing extracting solvent under negative pressure

A technology for extracting solvent and pressurizing solvent, applied in the field of solvent extraction samples, can solve the problems of reduced extraction repeatability and poor wettability, and achieve the effects of improving extraction performance, avoiding secondary pollution and reducing costs.

Active Publication Date: 2011-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, more residual gas makes the wettability of the sample worse, resulting in lower extraction repeatability

Method used

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  • Pressing solvent extraction device for absorbing extracting solvent under negative pressure
  • Pressing solvent extraction device for absorbing extracting solvent under negative pressure

Examples

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Embodiment Construction

[0025] Such as Figure 1 Shown is a pressurized solvent extraction device for inhaling extraction solvent under negative pressure. The device includes an air pump 100, a high-pressure infusion pump 110, a buffer container 200, a flow switching valve 350, an extraction pool 500, an extraction pool heater 600, and a liquid sensor. 650, extraction solvent 700, extraction liquid collection bottle 710, waste liquid collection bottle 720 and auxiliary carrier gas 800;

[0026] An extraction pool heater 600 is arranged on the outer wall of the extraction pool 500;

[0027] The upper end of the extraction pool 500 is connected to the buffer container 200 through a pipeline, and the first high-pressure switch valve and the liquid sensor 650 are arranged in turn on their connecting pipeline, and the buffer container 200 is connected to the gas inlet of the air pump 100 through a pipeline; the buffer container The lower end of 200 is connected to the waste liquid collection bottle 720 t...

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Abstract

The invention relates to a pressing solvent extraction device for absorbing an extracting solvent under negative pressure. In the device, a small air extracting pump serves as a negative pressure source; most of gases in an extraction pool and samples in the extraction pool are exhausted; the extracting solvent is absorbed into a sample pool and filled in the sample pool; the extraction pool is heated to a specified temperature; and pressure is supplemented by a high-pressure transfusion pump, so that high pressure intensity required in the extraction process is met. Gases in the extraction pool and the extracted samples can be effectively exhausted by the entrance mode of the solvent, so that the samples are soaked completely with the extracting solvent, and extraction efficiency and extraction repeatability can be obviously improved. Pressure reduction by exhaust and drainage is not required in the extraction heating process. The technology is applied to a pressing solvent extraction instrument, so a high-pressure release valve and a corresponding control system in the pressing solvent extraction instrument can be saved, cost of equipment is reduced, extraction performance is improved, and secondary pollution to the environment is reduced.

Description

technical field [0001] The invention relates to solvent extraction samples, in particular to a pressurized solvent extraction instrument or extraction device. Background technique [0002] In addition to traditional Soxhlet extraction, liquid-liquid extraction, microwave extraction, supercritical fluid extraction and accelerated solvent extraction, the new technology of pressurized solvent extraction has gradually been adopted by the standards of various countries. Adopted and listed as the standard method of the US Environmental Protection Agency EPA. [0003] The United States has developed a high-efficiency solvent extraction technology for extracting organic analytes in solid samples. It fully contacts organic analytes and non-aqueous organic solvents in an extraction cell that applies high temperature and high pressure. This process is described in detail in U.S. Patent application Ser. No. 08 / 259,667 and is entitled "Accelerated Solvent Extraction System". [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/02
Inventor 关亚风
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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