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Industrialized organic solvent deep dehydration method

An organic solvent, deep dehydration technology, applied in the field of chemical solvent water removal, can solve problems such as high cost, and achieve the effect of ensuring purity, avoiding deterioration and continuous dehydration

Active Publication Date: 2022-07-08
河北利仕化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for deep dehydration of industrialized organic solvents, aiming at solving the technical problem of using molecular sieves to dehydrate a large amount of industrialized solvents in the above-mentioned prior art.

Method used

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  • Industrialized organic solvent deep dehydration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: according to the attached figure 1 As shown in the process flow, the solvent storage tank 1 contains 5000L of organic solvent, the initial moisture of the solvent is between 0.60-0.50%, the inner diameter of molecular sieve drying tower I4, molecular sieve drying tower II5 and molecular sieve drying tower III6 are all 500mm, and the filling height of molecular sieve is 5000mm. , the solvent circulation volume is 30m 3 / h.

[0047] A. The solvent cooler does not pass refrigerant, and the circulating solvent does not cool down. The organic solvent is only circulated through the molecular sieve drying tower 4. Compare this with the dehydration process with refrigerant added.

[0048] After the first batch of 5000L organic solvent was circulated for 90 minutes, the moisture content of the organic solvent was reduced to 0.011%, and the temperature was 32°C;

[0049] After the second batch of 5000L organic solvent was circulated for 90min, the moisture content ...

Embodiment 2

[0066] Example 2: according to the attached figure 1 As shown in the process flow, 5000L of organic solvent is injected into solvent tank 1, the initial moisture of the solvent is between 0.60-0.50%, the inner diameter of molecular sieve drying tower I4, molecular sieve drying tower II5 and molecular sieve drying tower III6 are all 500mm, and the filling height of molecular sieve is 5000mm. The organic solvent circulation volume is 30m3 / h.

[0067] In Example 1, the molecular sieve drying tower II5 of Example B is used as the first-stage dehydration tower. Molecular sieve drying tower III6 is used as the second-stage dehydration tower, and is operated according to Example B in the embodiment, and 11 batches of organic solvents are recycled and dehydrated, and the final moisture of the 11th batch of solvents is 0.027%. At the same time, the molecular sieve drying tower I4 is fed with heated nitrogen for stripping and regeneration. Control the temperature of nitrogen gas into ...

Embodiment 3

[0071] Example 3: In Example 2, the molecular sieve drying tower I4 was used as the first-stage drying tower, and the molecular sieve drying tower II5 was regenerated under the following conditions and used as the second-stage regeneration drying tower.

[0072] Molecular sieve drying tower II5 regeneration conditions: temperature after nitrogen preheating: 120-130 °C; molecular sieve drying tower II5 internal temperature control: 120-130 °C; use nitrogen heater to heat nitrogen and pass it into molecular sieve drying tower II5, and use hot nitrogen to blow De-regeneration for 32h, followed by cooling with cold nitrogen for 3h.

[0073] Attached figure 1 As shown in the process flow, there is 5000L of organic solvent in the solvent storage tank 1, the initial moisture of the organic solvent is between 0.60-0.50%, the inner diameter of the molecular sieve drying tower I4, molecular sieve drying tower II5 and molecular sieve drying tower III6 are all 500mm, and the molecular sie...

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Abstract

The invention discloses an industrialized organic solvent deep dehydration method, which belongs to the technical field of chemical solvent water removal. Dehydration is carried out under the protection of dry nitrogen to avoid the deterioration of organic solvents; the organic solvent is cooled by a solvent cooler and then enters the molecular sieve drying tower for dehydration. The low-temperature molecular sieve can effectively improve the dehydration efficiency; at the same time, the dehydrated organic solvent can filter out the organic solvent. The impurities such as molecular sieve debris generated during the regeneration process ensure the purity of the organic solvent, thereby avoiding affecting the normal operation of the downstream production process; the heat exchanger and nitrogen heater in the molecular sieve drying tower are used to maintain the regeneration temperature of the molecular sieve, and the regenerated molecular sieve Continue into the dehydration process. By adopting the invention, the continuous dehydration of the organic solvent can be realized, the dehydration efficiency can be improved, and the purity of the organic solvent can be ensured at the same time.

Description

technical field [0001] The invention belongs to the technical field of chemical solvent water removal, and in particular relates to an industrialized organic solvent deep dehydration method. Background technique [0002] In the modern industrial production process, anhydrous organic solvents occupy an important position. Such as Grignard reaction, reactions involving active metals or reagents, electrolytes of lithium batteries, etc., all need to be carried out under the condition of anhydrous organic solvents. The moisture of organic solvents seriously affects these industrial productions, and even safety accidents occur. Therefore, the dehydration of organic solvents is a crucial part in the above-mentioned production process. [0003] At present, there are many methods for dehydration of organic solvents, such as pervaporation membrane method, chemical dehydration, azeotropic distillation, molecular sieve dehydration and so on. Among them, molecular sieve dehydration is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/08B01J20/34
CPCB01D15/08B01J20/3458Y02P20/10
Inventor 李伟宪周保良李丽敏陈波李伟光王志强赵晓鹏
Owner 河北利仕化学科技有限公司
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