Production process for preparing polyaspartic acid based on solid superacid
The use of solid superacid SO42-/ZrO2-Al2O3 as a catalyst in the production of poly-L-aspartic acid addresses the issues of water consumption and environmental pollution in existing methods, achieving higher efficiency and catalyst recovery.
CN119638994AActive Publication Date: 2025-03-18BEIJING YANZHISHAN TECH CO LTD
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Patent Information
- Application Number
- CN202510177035.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2045-02-18
AI Technical Summary
Technical Problem
The existing methods for producing poly-L-aspartic acid (PLA) consume large amounts of acid as catalysts, leading to significant water usage and environmental pollution, with limited catalyst recovery and high water consumption.
Method used
A production process using solid superacid SO42-/ZrO2-Al2O3 as a catalyst in a vacuum high-temperature reaction to synthesize PLA, followed by filtration and acid regeneration, allowing for reduced water usage and catalyst recycling.
Benefits of technology
This process enhances catalyst efficiency, reduces water consumption, and simplifies the production line by avoiding acidic waste treatment, enabling the reuse and regeneration of the catalyst, thus minimizing environmental impact.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention belongs to the field of preparation of high-molecular polymers, and discloses a production process for preparing polyaspartic acid based on solid superacid, which comprises the following steps: by taking aspartic acid as a raw material and solid superacid SO4 < 2-> / ZrO2-Al2O3 with the particle size of more than 80 meshes as a catalyst, reacting under a vacuum high-temperature condition to obtain a polymerization product, crushing the polymerization product, screening particles with the particle size of less than 100 meshes to obtain polysuccinimide, and hydrolyzing the polysuccinimide in a sodium hydroxide or potassium hydroxide aqueous solution to obtain a sodium polyaspartate or potassium polyaspartate aqueous solution; and carrying out filtration or electrodialysis treatment on the sodium polyaspartate or potassium polyaspartate aqueous solution, sterilizing, and drying to obtain the polyaspartic acid. According to the method, solid superacid SO4 < 2-> / ZrO2-Al2O3 is used as the catalyst, so that the water resource consumption is reduced, the process route is simplified, the treatment procedure of washing acidic wastewater is avoided, and the catalytic efficiency is high.
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