A catalyst recycling device and a continuous production process for pivalic acid

By using the layered structure and multi-stage filter technology of the catalyst recycling device, the problem of difficult recovery of impurity layers in the production of tervaline is solved, realizing efficient separation and catalyst recycling in the continuous production process of tervaline, and improving the overall production efficiency and economy.

CN121606951BActive Publication Date: 2026-06-30HEBEI GUOCHEN CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEBEI GUOCHEN CHEM CO LTD
Filing Date
2025-12-11
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In the continuous production process of tervaline, the presence of impurities and organic matter in the impurity layer makes it difficult to effectively recover and recycle them, thus affecting process efficiency and economy.

Method used

A catalyst recycling device is used, which achieves effective separation and recycling of pentavalent acid, impurity layer and dilute sulfuric acid through layered structure design and multi-stage filter filtration. Impurity layer is treated with clay, and the filtered liquid after mixing is returned to the hydrolysis reactor. Dilute sulfuric acid is concentrated and recycled.

Benefits of technology

It improves production efficiency, reduces costs, reduces waste emissions, and enables the recycling of catalysts, resulting in significant economic and environmental benefits.

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Abstract

This invention belongs to the field of pivalic acid production technology, specifically a catalyst recycling device and a continuous pivalic acid production process, including a base; a hydrolysis reactor is fixedly connected to the base; by opening the solenoid valve on the second water pipe, the impurity layer is fed into the mixer, and bleaching clay is added into the feed pipe to mix with the impurity layer in the mixer. The mixed slurry is sent to the treatment tank for filtration, and finally the filtered liquid is pumped back to the hydrolysis reactor for recycling hydrolysis through the first return pipe; while the dilute sulfuric acid can be discharged from the hydrolysis reactor after the impurity layer is treated by opening the solenoid valve on the third water pipe for concentration treatment, and the concentrated sulfuric acid is returned to the high-pressure reactor for recycling. This device, through its layered structure design, achieves effective separation of various components and recycling of the catalyst in the continuous production of pivalic acid, which not only improves the overall production efficiency, but also reduces production costs and waste emissions, resulting in significant economic benefits.
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