Method for treating heavy bis(fluorosulfonyl)imide residue
By reacting the heavy residue of bis(fluorosulfonyl)imide with an acidic aqueous solution to generate a fluorinated acid solution and crude aminosulfonic acid, the problem of resource utilization of the heavy residue of bis(fluorosulfonyl)imide was solved, and cost reduction and economic benefits were achieved.
Patent Information
- Application Number
- PCT/CN2025/100861
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-06-17
- Filing Date
- 2025-06-13
- Publication Date
- 2025-12-26
AI Technical Summary
In existing technologies, the bis(fluorosulfonyl)imide heavy residue has poor flowability, making it difficult to utilize as a resource, resulting in high processing costs. As market demand increases, more waste residue is generated, necessitating the development of effective treatment methods.
By reacting the heavy residue of difluorosulfonamide with an acidic aqueous solution, a fluorinated acid solution and crude aminosulfonic acid are generated. By controlling the feeding time, temperature, stirring speed and rinsing process, a commercially available aminosulfonic acid product can be obtained. The fluorinated acid solution is used as a by-product acid, thereby reducing costs.
This method enables the resource-based recycling of bis(fluorosulfonyl)imide heavy residue, reducing processing costs and improving economic efficiency. The generated aminosulfonic acid can be sold directly, and the fluorinated acid solution can be used as a by-product acid, reducing processing costs.