A 4,4'-oxydianiline crystallization apparatus

By designing a crystallization device with multiple crystallization chambers and a feeding mechanism, the problem of discontinuous production of 4,4'-diaminodiphenyl ether crystals in the existing technology has been solved, achieving efficient crystal production and increased capacity.

CN122183203APending Publication Date: 2026-06-12EURASIAN CHEM CO LTD SHANDONG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EURASIAN CHEM CO LTD SHANDONG
Filing Date
2026-03-13
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

The existing crystallization equipment cannot achieve continuous production of 4,4'-diaminodiphenyl ether crystals, resulting in limited production capacity.

Method used

Design a crystallization device including multiple crystallization chambers and a feeding mechanism to achieve batch crystallization of 4,4'-diaminodiphenyl ether solution through step-by-step crystallization and multi-stage rotation, and finally obtain crystals with continuously increasing viscosity.

Benefits of technology

Continuous production of 4,4'-diaminodiphenyl ether crystals has been achieved, increasing production capacity. A special feeding mechanism ensures complete dumping and separation of the crystals, thereby improving production efficiency.

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Abstract

The present application relates to the technical field of chemical device, specifically to a 4,4'-diamino diphenyl ether crystallization device, which comprises a crystallization tank and a material guiding mechanism, two parallel distribution baffles are equidistantly arranged inside the crystallization tank, the two baffles divide the inside of the crystallization tank into three crystallization chambers, and a feed pipe is fixedly arranged on the top of the crystallization tank near one end of the power motor. The present application can gradually crystallize the 4,4'-diamino diphenyl ether solution through the arrangement of multiple crystallization chambers and multiple material guiding mechanisms, and then obtain crystal solutions with increasing viscosity in batches, and finally obtain 4,4'-diamino diphenyl ether crystal particles. Compared with the prior art, the present application can continuously obtain 4,4'-diamino diphenyl ether crystal, thereby improving the production capacity of 4,4'-diamino diphenyl ether.
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Citation Information

Patent Citations

  • Purification device for diaminodiphenyl ether production

    CN220588939U