Treatment method of R143a or R142b process waste catalyst

Through the method of ion exchange resin adsorption and ozone aeration, the problem of difficult color removal and serious pollution of waste catalysts in the R143a or R142b process is solved, and the effective treatment of waste catalysts and the recycling of tin compounds are achieved.

CN119873958APending Publication Date: 2025-04-25WENZHOU UNIV +1
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Patent Information

Application Number
CN202411991003.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-04-25

AI Technical Summary

Technical Problem

The prior art is difficult to effectively treat the R143a or R142b process waste catalyst, which makes it difficult to remove the color of the waste catalyst, and contains a large amount of organic matter, total organic carbon and total nitrogen, which is seriously polluted.

Method used

The adsorption treatment was performed using ion exchange resins (such as 732, D113, 001×7), exchanged through a chromatography column, and then aeration was performed using an ozone aeration device, combined with dilute hydrochloric acid to recover the tin compound.

Benefits of technology

The color removal of the waste catalyst is achieved, the total organic carbon, total nitrogen and chemical oxygen demand is reduced, the tin compound is recovered, the service life of the tin catalyst is extended, and the pollution is reduced.

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Abstract

The invention discloses an R143a or R142b process waste catalyst treatment method, which comprises: (1) carrying out adsorption treatment on an R143a or R142b process waste catalyst by using an adsorbent A to obtain a reddish brown transparent liquid; the adsorbent A is selected from cation exchange resin of one of the following models: 732, D113 and 001 * 7; (2) carrying out secondary adsorption treatment on the reddish brown transparent liquid obtained in the step (1) by using an adsorbent B to obtain colorless transparent liquid; the adsorbent B is selected from one of the following types of resins: HP355, HP606 and HP268; and (3) transferring the colorless liquid obtained in the step (2) into an ozone aeration device, and introducing ozone for aeration treatment to obtain the treated R143a or R142b process waste catalyst. The color of the waste catalyst can be removed, organic matters in the waste catalyst can be removed, and total organic carbon and total nitrogen can be reduced.
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Citation Information

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