Filtering device for 3, 4-dihydroxybenzonitrile

Through a filter device coated with titanium filter element with polytetrafluoroethylene film, the problem of difficult to control color and turbidity in 3,4-dihydroxybenzonitrile purification is solved, and a high-efficiency and low-cost filtration effect is achieved to obtain high-purity products.

CN223287753UActive Publication Date: 2025-09-02HANGZHOU BAIYU BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202422491045.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-15
Publication Date
2025-09-02
Estimated Expiration
2034-10-15

AI Technical Summary

Technical Problem

In the prior art, the purification process of 3,4-dihydroxybenzonitrile is complicated, and the color and turbidity of the product are difficult to meet the requirements, resulting in low yield and purity, which cannot meet the application needs in the fields of drugs and other fields.

Method used

The titanium filter element filter device is coated with polytetrafluoroethylene film, combined with a precision filter, a sewage outlet is designed in the center of the bottom, a heating sleeve is set, and the titanium filter element is protected by polytetrafluoroethylene film, which is easy to clean and ensures filtration efficiency and product purity.

Benefits of technology

Highly efficient decolorization and reduced turbidity are achieved, and a high-purity 3,4-dihydroxybenzonitrile solution is obtained, which improves the yield and purity of the product and reduces the filtration cost.

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Abstract

The utility model discloses a filtering device for 3, 4-dihydroxybenzonitrile, which is suitable for decoloring and filtering a 3, 4-dihydroxybenzonitrile crude product solution by using a precision filter after the 3, 4-dihydroxybenzonitrile crude product solution is synthesized from materials such as hydroxylamine hydrochloride, methanol, vanillin, powdered activated carbon and the like, and a titanium filter element coated with a polytetrafluoroethylene film is arranged in the precision filter. The titanium filter element coated with the polytetrafluoroethylene film is a special device special for the 3, 4-dihydroxybenzonitrile through special design, a 3, 4-dihydroxybenzonitrile solution with high chromaticity and turbidity requirements can be obtained through the filtering device, and a 3, 4-dihydroxybenzonitrile product with high purity can be obtained through crystallization.
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