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A reversible crystallization filter device

A technology of crystallization equipment and filter plate, which is applied in the field of equipment with both filtration function in crystallization process, can solve the problems of inability to contact with air, no solvent, and inappropriate addition of crystallization solvent, etc., and achieve the effect of not easy to operate in open air

Active Publication Date: 2015-10-14
SHANDONG KEXIN BIOCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current equipment is to transfer the material to the filter device for filtration after the crystallization is completed, but if the following problems exist in the crystallization process, such as no solvent, it is not suitable to add more crystallization solvents, and the crystallization product itself has a pungent smell and is difficult to operate in the open , The crystallized product is heat sensitive and cannot be in contact with the air, and it is difficult to achieve filtration after the crystallization is completed

Method used

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  • A reversible crystallization filter device
  • A reversible crystallization filter device

Examples

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Effect test

Embodiment 1

[0017] Example 1: Purification of 2-chloro-5-chloromethylthiazole (melting point 29-30°C)

[0018] Add 20kg of methanol to 180kg of 2-chloro-5-chloromethylthiazole (content 90-94%), control the temperature at about 38°C, and enter the kettle body 1 of the reversible crystallization equipment through the feed port, and the jacket of kettle body 1 Slowly pour cold water at 5°C to lower the temperature in the kettle to 10°C for 6 hours, and crystallize slowly. After the crystallization is completed, water at 25-32°C is slowly introduced into the jacket of kettle body 1, and "sweats" for 4 hours. Slowly turn on the rotating device, so that the whole kettle body 1 starts to rotate with the rotating shaft 4 as the rotating shaft until 180°, and the material is slowly poured onto the filter plate 3. Turn on the rotating rod 5, which rotates on its own and moves to the filter plate 3, and the cross bar 7 at the front end pushes the materials accumulated on the surface of the filt...

Embodiment 2

[0019] Example 2: Purification of cyhalothrin (melting point 49.2°C)

[0020] Add 50kg of absolute ethanol to 200kg of cyhalothrin (content 90-95%), the temperature is about 50°C, and enter the reactor body 1 of the reversible crystallization equipment through the feed port, and the jacket of the kettle body 1 is slowly introduced -10°C salt water, let the temperature in the kettle drop to -5°C for 6 hours, and crystallize slowly. After the crystallization is completed, water at 45-48°C is slowly introduced into the jacket of kettle body 1 and kept for 5 hours. Slowly turn on the rotating device, so that the whole kettle body 1 starts to rotate with the rotating shaft 4 as the rotating shaft until 180°, and the material is slowly poured onto the filter plate 3. Turn on the rotating rod 5, which rotates on its own and moves to the filter plate 3, and the cross bar 7 at the front end pushes the materials accumulated on the surface of the filter plate 3 to level. Turn on the va...

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Abstract

The invention relates to turnover crystallization equipment which comprises a kettle body (1), a mother solution feed port (2), a filtering plate (3) which is arranged in the kettle body (1) and can perpendicularly divide the kettle body (1) into two parts, a rotating shaft (4) arranged in a horizontal direction outside the kettle body (1), a rotating rod (5) extending from the outside of the kettle body (1) to the inside of the kettle body (1), and a discharge port (6). The equipment is characterized in that the mother solution feed port (2) and the rotating rod (5) are located on one side of the filtering plate (3); the discharge port (6) is located on the other side of the filtering plate (3); the rotating rod (5) is perpendicular to the filtering plate (3) and can move relative to the filtering plate (3); and a cross rod (7) parallel to the filtering plate is mounted at the front end of the rotating rod (5). The equipment has the advantages that the equipment can achieve crystallization and filtering in a totally-enclosed environment, and is suitable for a crystallization product which has a pungent smell, cannot contact air, is easy to oxidize, is not suitable for open operation and has a melting point below 180 DEG C.

Description

technical field [0001] The invention belongs to the field of chemical equipment, and in particular relates to equipment with crystallization and filtering functions in the crystallization process. Background technique [0002] The crystallization process is a very economical physical process for improving the purity of solid products. The current equipment is to transfer the material to the filter device for filtration after the crystallization is completed, but if the following problems exist in the crystallization process, such as no solvent, it is not suitable to add more crystallization solvents, and the crystallization product itself has a pungent smell and is difficult to operate in the open , The crystallized product is heat-sensitive and cannot be in contact with the air, and it is difficult to achieve filtration after the crystallization is completed. Contents of the invention [0003] The object of the present invention is to provide a crystallization devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/02B01D29/01
Inventor 刘伟华左伯军李磊李德军李旭坤侯波马新刚申宝玉童佩剑程圆杰
Owner SHANDONG KEXIN BIOCHEM
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