Method for full resource utilization of soda ash plant waste residue wastewater
By using mixed heating dissociation and gas carbonization precipitation technology, the problems of incomplete component extraction and material balance in the treatment of waste residue and wastewater in soda ash plants have been solved. This has enabled the preparation of high-value products and full resource utilization, reduced energy consumption and environmental pollution, and is suitable for industrial applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CARBON SILVER (HEBEI XIONGAN) NEW ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2026-05-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for treating waste residue and wastewater from soda ash plants suffer from problems such as incomplete component extraction, low product added value, high energy consumption, and difficulty in balancing system materials. These issues make it difficult to achieve full disposal and closed-loop recycling, and traditional disposal methods lead to environmental pollution.
By mixing waste residue, wastewater, and circulating mother liquor with ammonium salt and heating to dissociate them, ammonia and carbon dioxide are recovered. Magnesium hydroxide is extracted by adding calcium source to the filtrate and carbonization is carried out. Light calcium carbonate is prepared by carbonization using the recovered gas. The calcium extraction filtrate is purified by NaCl to generate sodium carbonate, realizing a closed-loop cycle of the extractant and mother liquor, and preparing a variety of high-value products.
It achieves efficient extraction of all components from waste residue and wastewater, significantly increases the added value of resource-based products, reduces the consumption of chemical reagents and water resources, reduces environmental pollution, and has mild process conditions that are easy to implement industrially.
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