Impurity removal and crystallization device for p-aminobenzene sulfonic acid crude product

Through the decontamination and crystallization device composed of catalyst sedimentation kettle and other equipment, the decolorization problem of the crude p-aminobenzenesulfonic acid product is solved, and the purity and color of p-aminobenzenesulfonic acid is improved, and the appearance quality and market competitiveness of the product are improved.

CN223221484UActive Publication Date: 2025-08-15SHANXI YINYING CHEM CO LTD
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Patent Information

Application Number
CN202422460252.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-12
Publication Date
2025-08-15
Estimated Expiration
2034-10-12

AI Technical Summary

Technical Problem

In the prior art, when removing impurities and crystallization of crude aminobenzenesulfonic acid, effective decolorization treatment is lacking, resulting in the color of recrystallized products being not pure enough, affecting the appearance quality and market acceptance of the product.

Method used

The impurity-removing and crystallization device consisting of a catalyst sedimentation kettle, membrane filtration kettle, decolorization kettle, activated carbon, distillation kettle, crystallization kettle and centrifuge are used to improve the purity and color clarity of para-aminobenzenesulfonic acid through catalytic separation, filtration, decolorization and purification steps.

Benefits of technology

It improves the purity of para-aminobenzenesulfonic acid and the clarity of the product color, improves the appearance quality and market acceptance of the product, reduces material waste, and improves resource utilization.

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Abstract

The impurity removal and crystallization device comprises a catalyst settling kettle, one side of the catalyst settling kettle is provided with a crude product feed port, the top of the catalyst settling kettle is provided with a hydrogen feed port, the bottom of the catalyst settling kettle is provided with a catalyst recovery discharge port, and the catalyst recovery discharge port is provided with an impurity removal and crystallization device. One side, far away from the crude product feeding hole, of the catalyst settling kettle is provided with a first purified liquid discharging hole, one end, far away from the catalyst settling kettle, of the first purified liquid discharging hole is communicated with a first membrane filtering kettle, and the outer wall of the first membrane filtering kettle is provided with a first solid isolate discharging hole; a second purified liquid discharge hole is formed in the outer wall of the first membrane filtration kettle. The utility model relates to the technical field of chemical product production, and solves the problems that in the prior art, when impurity removal and crystallization are carried out on a p-aminobenzene sulfonic acid crude product, the crude product is not effectively decolorized, so that the color of a recrystallized product is not pure enough, and the appearance quality and the market acceptability of the product are influenced.
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