High temperature-resistant and high pressure-resistant pool for solvent extraction
An extraction cell and high temperature resistant technology, which is applied to the extraction of organic substances in solid or semi-solid samples under heating and pressure conditions. The high temperature and high pressure cell field of solvent extraction can solve the problem that the knife edge is easily damaged, there is no protective measures, and the cost of use High problems, to achieve the effect of reducing the cost of use, easy disassembly and cleaning, and simple structure
Inactive Publication Date: 2007-08-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
The disadvantages of the U.S. Patent (U.S.Pat.No.5647976) are: (1) The structure of the sealing cover of the extraction cell is relatively complicated, and special tools are required to take out the elastic card from the sealing cover with special tools for each sample to be disassembled and cleaned. Then there are threaded rings, sealing gaskets, stainless steel filters and other parts; (2) The design adopts a rotary compression-seal structure. During the sealing process, there is rotational movement between the metal sealing knife edge and the sealing gasket, and the operator needs to use a lot The strength to ensure its good bite
The sealing gasket will be damaged after 1-3 times of use, and needs to be replaced frequently, and the cost of use is very high; (3) Even if the sealing knife edge is slightly damaged, the sealing gasket will be scratched, and the high-pressure sealing function cannot be completed; (4) the extraction The end of the pool is designed to seal the knife edge without any protection measures. During the cleaning and installation of the extraction pool, the knife edge is easily damaged due to the collision or falling of parts
The extraction cell with a damaged knife edge cannot be sealed under high pressure, so it can only be returned to the factory for reprocessing, which is expensive; (5) The size of the stainless steel filter used is large, which is equivalent to the inner diameter of the extraction cell, but the filtration of the solvent and the extraction solution only needs a small area filter
Because the price of the filter is proportional to its area, and the filter must be replaced frequently, the above design increases the cost of use
Method used
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Embodiment 1
[0030] Referring to Figures 1 and 2, an extraction cell that can perform solvent extraction of organic matter in solid or semi-solid samples under high temperature and high pressure is mainly composed of three parts: a cell body 100, a sealing cover 200, and a sealing cover pressing cap 300 .
[0031] 1) The wall of the extraction cell is made of stainless steel seamless steel pipe with good inertness, which can withstand a working pressure of 20MPa and a temperature of 200°C. The inner diameter of the cavity is 5-40mm.
[0032] The end of the cell body is inlaid with an extraction cell positioning platform 102 (in this example, a positioning ring) and a sealing knife edge 103 protruding from the end face of the cell body. The positioning ring ensures that the sealing cover, the sealing gasket and the cell body are in place accurately; The pool positioning platform 102 is statically matched with the end of the pool body. During cleaning and assembling the extraction pool, when...
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The invention involves sample extraction device, specifically a resistant high temperature and high pressure pool used for solvent extraction, it includes the extraction pool, sealing cover, sealing cover caps, sealing components and other components. The surface of extraction pool is installed with extraction pool positioning bench, the extraction pool end surface of the extraction pool inner is equipped with haunched sealing knife-edge; the sealing cover is installed on the surface of extraction pool and near the sealing cover positioning bench installed on the side of extraction pool, the inner of sealing cover positioning bench is equipped with haunched sealing knife-edge, and the middle of sealing cover is installed with sealing cover guide hole; the ring sealing pads are equipped between the sealing knife-edge and the sealing cover knife-edge; the press cap of sealing cover cap is crimp connected with the outside of sealing cover and connected with the extraction pool screw thread, ball roller thrust bearing is equipped between the sealing cover caps and the sealing cover. The invention has some advantages as: convenient use, low cost and long life, it applies to the extraction pool used for accelerating the solvent extraction.
Description
technical field [0001] The invention relates to a sample extraction device, in particular to a high-temperature and high-pressure resistant cell for solvent extraction, which is especially suitable for the extraction of organic matter in solid or semi-solid samples under heating and pressure conditions. Background technique [0002] The sample analysis process includes five parts: sampling, sample preparation and processing, analysis and measurement, data processing, and summary report. Through statistics, it is found that the time required for sample processing accounts for 61% of the entire analysis process, while the time for analysis and determination only accounts for 6%. Sample preparation time was 10 times that of analytical determination. Therefore, the research on efficient and rapid sample preparation and automatic pretreatment methods has become one of the main directions of modern analytical chemistry research. In addition to the traditional Soxhlet extraction a...
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IPC IPC(8): B01D11/00
Inventor 关亚风廉玫李金祥赵景红
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI