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Purification method and purification equipment for organic solvent

A technology of organic solvent and purification method, applied in chemical instruments and methods, separation methods, fractionation and other directions, can solve the problems of poor economy, high purification cost, unable to meet the needs of use, etc., and achieve the effect of high economy and low cost of raw materials

Pending Publication Date: 2022-08-02
上海傲班科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The organic solvent produced by the current production method has a high content of metal elements and cannot meet the needs of use. Therefore, the organic solvent needs to be purified.
In the prior art, rectification towers are usually used to rectify organic solvents to improve the purity of organic solvents. However, rectification towers are generally industrial production devices with an annual output of 1,000 tons, which is too high for the elemental analysis industry. (A single dosage is only about 100 ml during elemental analysis), resulting in higher purification costs and poor economic efficiency; in addition, after the organic solvent is rectified by a rectification tower, the lowest content of elemental impurities in the product can only reach the impurity element The content is at the level of 10ppb (ng / g), which cannot reach the level of impurity elements less than 10ppt (ng / kg)

Method used

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  • Purification method and purification equipment for organic solvent
  • Purification method and purification equipment for organic solvent
  • Purification method and purification equipment for organic solvent

Examples

Experimental program
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Effect test

Embodiment 1

[0041]This embodiment discloses a purification equipment for organic solvents, such as figure 1 As shown, the purification equipment includes a small rectification device 1, a raw material tank 3, a product tank 4 and a steam condensation tank 5. A heating device 2 is installed at the bottom of the small rectification device 1, and the side of the small rectification device 1 is provided with a raw material port and a discharge. The raw material port and the discharge port are respectively connected with the raw material tank 3 and the product tank 4 through pipelines. The top of the small rectification device 1 is provided with a gas balance port, and the gas balance port is connected with the steam condensing tank 5 through pipelines. The condensation tank 5 is connected with a pressure relief pipe 6 and a protective gas inlet pipe 8 , and a pressure relief valve 7 is installed on the pressure relief pipe 6 . The small rectification device 1 is selected as the equipment for ...

Embodiment 2

[0047] A kind of purification method of organic solvent (nitrogen-methylpyrrolidone), comprises the steps:

[0048] S1, 0.1g of mannitol is added to 1.4kg of technical grade nitrogen-methylpyrrolidone, fully mixed to obtain a mixed solution;

[0049] S2, adopt inert gas argon to purge the purification equipment in embodiment 1 for 5 minutes, then add the mixed solution into the small rectification device 1 from the raw material tank 3;

[0050] S3, regulate the heating device 2, adjust the temperature at the bottom of the small rectification device 1 to 121 ° C, the distillation product enters the product tank 4 from the discharge port, and wait for 48 hours to obtain 500g of ultra-high-purity nitrogen-methylpyrrolidone ;

[0051] S4. Continue to distill and add raw materials regularly. About every 48*2 hours, 1kg of product can be obtained, 1kg of raw materials are added every four days, and the purification equipment is emptied every 14 days.

[0052] Inductively coupled p...

Embodiment 3

[0058] A kind of purification method of organic solvent (isopropanol IPA), comprises the steps:

[0059] S1, add 0.1g of mannitol to 1.0kg of technical grade isopropanol, fully mix to obtain a mixed solution;

[0060] S2, adopt inert gas argon to purge the purification equipment in embodiment 1 for 5 minutes, then add the mixed solution into the small rectification device 1 from the raw material tank 3;

[0061] S3, regulating and controlling the heating device 2, adjusting the bottom temperature of the small rectifying device 1 to 80° C., the distillation product enters the product tank 4 from the discharge port, and waits for 48 hours to obtain 500g of ultra-high-purity isopropanol;

[0062] S4. Continue to distill and add raw materials regularly. About every 48*2 hours, 1kg of product can be obtained, 1kg of raw materials are added every four days, and the purification equipment is emptied every 14 days.

[0063] Inductively coupled plasma mass spectrometer (model PerkinEl...

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Abstract

The invention discloses an organic solvent purification method, which comprises: S1, adding mannitol into an organic solvent, and completely and uniformly mixing to obtain a mixed solution; s2, purging the interior of the small rectification device by adopting inert gas, providing a protective atmosphere, and adding the mixed solution into the small rectification device from a raw material port; s3, the temperature of the bottom in the small rectification device is adjusted to the distillation temperature required by the corresponding organic solvent, a distillation product enters a product tank from a discharge port, continuous distillation is performed, and raw materials are supplemented regularly; wherein in the step S3, the distillation temperature required by the organic solvent is lower than the boiling point of the organic solvent, and the organic solvent does not change color at the distillation temperature. By adopting the purification method, the boron element in the organic solvent can be effectively removed, the ultra-pure organic solvent is obtained after purification treatment, and the content of impurity elements is less than 10ppt (nanogram / kg).

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a purification method and purification equipment of an organic solvent. Background technique [0002] In the semiconductor and optoelectronic materials industries, many organic materials require extremely high purity, and the detection of these organic materials (such as elemental analysis) requires the use of ultra-high-purity organic solvents to dissolve them before testing. Influence, the organic solvent is required to reach the level of impurity element content of less than 10ppt (nanogram / kg). [0003] The organic solvent processed and produced by the current production method has a high content of metal elements, which cannot meet the needs of use. Therefore, it is necessary to purify the organic solvent. In the prior art, a rectifying tower is usually used to carry out rectification treatment to the organic solvent to improve the purity of the organic solvent. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/14B01D5/00
CPCB01D3/14B01D5/006Y02E10/549
Inventor 常晖
Owner 上海傲班科技有限公司
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