Purification device of curing agent 4-methyl tetrahydrophthalic anhydride for light emitting diode

By introducing periodic negative pressure filtration combined with vibration separation, the problem of curing agent retention in traditional vibration screening is solved, efficient curing agent separation and fine particle capture are achieved, and separation efficiency and equipment stability are improved.

CN223352217UActive Publication Date: 2025-09-19JIAXING ZHENGDA CHEM
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Patent Information

Application Number
CN202422471689.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-12
Publication Date
2025-09-19
Estimated Expiration
2034-10-12

AI Technical Summary

Technical Problem

In the prior art, during the purification of 4-methyltetrahydrophthalic anhydride, a curing agent for light-emitting diodes, traditional vibration screening technology leads to curing agent retention problems, making it difficult to efficiently separate fine particles, thus affecting the separation effect and efficiency.

Method used

It adopts the method of periodic negative pressure filtration combined with vibration separation. The rotary vacuum pump provides periodic negative pressure. Combined with the conical separation screen and negative pressure cover, it achieves the perfect combination of vibration and negative pressure, improving the screening efficiency and the ability to capture fine particles.

Benefits of technology

Significantly improves the separation efficiency and screening effect of the curing agent, prevents retention, ensures production continuity and equipment stability, and avoids equipment failure.

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Abstract

The utility model provides a light emitting diode curing agent 4-methyl tetrahydrophthalic anhydride purification device, which comprises a pretreatment kettle, a plurality of curing agent separators, a periodic electromagnetic valve, an airflow main pipe and a rotary vacuum pump, the curing agent separators are arranged in the pretreatment kettle, the curing agent separators are arranged at intervals, and the periodic electromagnetic valve is arranged in the airflow main pipe. The curing agent separator is communicated with the airflow main pipe through the periodic electromagnetic valve; the lower end of the airflow main pipe is communicated with the rotary vacuum pump; a periodic negative pressure filtering mode is introduced, and perfect combination of vibration and negative pressure separation is achieved. By means of the design, the filtering efficiency is improved, the curing agent is separated more rapidly, and the screening effect is optimized. The negative pressure enables the materials to be more tightly attached to the screen, and the capacity of capturing fine particles is enhanced. The periodic negative pressure change improves the screening efficiency, and continuous and stable screening is ensured. The gap design between the conical separating screen and the valve seat prevents retention of the curing agent, avoids blocking, and guarantees smooth production.
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Claims

1. A purification device for 4-methyltetrahydrophthalic anhydride, a curing agent for light-emitting diodes, characterized in that: It includes a pretreatment kettle (1), a curing agent separator (2), a periodic solenoid valve (3), a main air flow pipe (4) and a rotary vacuum pump (5). A plurality of the curing agent separators (2) are installed inside the pretreatment kettle (1), and there is a spacing between the curing agent separators (2). The curing agent separators (2) are connected to the main air flow pipe (4) through the periodic solenoid valve (3), and the lower end of the main air flow pipe (4) is connected to the rotary vacuum pump (5). The curing agent separator (2) includes a top seat (21), a vibrator (22), a conical separation screen (23), a negative pressure hood (24), a valve seat (25), a discharge pipe (26) and a negative pressure pipe (27). The top seat (21) is fixedly installed inside the pretreatment kettle (1), the vibrator (22) is fixedly installed below the top seat (21), the output end of the vibrator (22) is fixedly connected to the conical separation screen (23), the negative pressure hood (24) is fixedly installed below the conical separation screen (23), the negative pressure hood (24) is located inside the valve seat (25), and the valve seat (25) is fixedly installed inside the pretreatment kettle (1); the negative pressure hood (24) is fixedly connected to the discharge pipe (26) and the negative pressure pipe (27) respectively, and the negative pressure pipe (27) is connected to the main air flow pipe (4) through the periodic solenoid valve (3).

2. The purification device for 4-methyltetrahydrophthalic anhydride as a curing agent for light emitting diodes according to claim 1, wherein: The periodic solenoid valve (3), the main air flow pipe (4) and the rotary vacuum pump (5) are located on one side outside the pretreatment kettle (1). The discharge pipe (26) and the negative pressure pipe (27) are corrugated pipes, and either end of the discharge pipe (26) and the negative pressure pipe (27) penetrates through the pretreatment kettle (1).

3. The purification device for 4-methyltetrahydrophthalic anhydride as a curing agent for light emitting diodes according to claim 1, wherein: The top seat (21) is of a triangular structure and is located above the conical separation screen (23). The conical separation screen (23) is of a conical structure with a slope on its surface. The area between the conical separation screen ( 4. The purification device for 4-methyltetrahydrophthalic anhydride as a curing agent for light emitting diodes according to claim 1, wherein: ​