Method for mineralization of organic waste liquid

By combining short-path molecular distillation separation and directional alkaline hydrolysis with oxygen-controlled incineration, stable phosphate glass is generated, solving the problems of equipment corrosion and product stability in TBP waste liquid treatment, and achieving efficient and safe mineralization treatment of radioactive waste liquid.

CN122417499APending Publication Date: 2026-07-17SICHUAN ENVIRONMENTAL PROTECTION ENG CO LTD CNNC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN ENVIRONMENTAL PROTECTION ENG CO LTD CNNC
Filing Date
2026-04-03
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies are difficult to effectively treat waste solvents in the tributyl phosphate (TBP)-diluent system, resulting in problems such as equipment corrosion, poor product stability, high processing costs, and poor adaptability to large-scale applications, which cannot meet the compliance requirements for radionuclide immobilization and disposal.

Method used

The process employs short-path molecular distillation separation pretreatment, directional alkaline hydrolysis conversion, and oxygen-controlled staged incineration. By generating dibutyl phosphate salt through alkaline hydrolysis and combining it with oxygen-deficient controlled incineration, phosphorus, sodium/potassium, and uranium elements are combined in situ to generate a stable phosphate glass, avoiding the formation of highly corrosive substances.

Benefits of technology

It achieves efficient mineralization processing, ensures long-term stable operation of the equipment, reduces operation and maintenance costs, extends equipment life, meets the compliance requirements for the containment and disposal of radionuclides, and is suitable for the large-scale needs of commercial reprocessing plants.

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Abstract

The application discloses a mineralization treatment method of organic waste liquid, and belongs to the technical field of radioactive waste treatment. The organic waste liquid contains uranium, tributyl phosphate and diluent. The mineralization treatment method comprises the following steps: the organic waste liquid is separated through short-path molecular rectification to obtain a diluent fraction and a tributyl phosphate fraction; the tributyl phosphate fraction is reacted with alkali liquor to generate an alkaline hydrolysis product containing dibutyl phosphate salt, n-butanol, water and uranium; the n-butanol is collected through condensation reflux; and the remaining alkaline hydrolysis product is treated through two-stage oxygen-controlled incineration, so that phosphate glass and qualified flue gas are finally obtained. The mineralization treatment method has the advantages of no corrosion, short process, high-efficiency mineralization and stabilization of the waste liquid, direct disposal of the product, consideration of resource recovery and radioactive safety, and easy industrialization.
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