一种格氏法制备苯基单体废渣的处理方法
By using a combination of ketone solvents and methylchlorosilanes in the treatment of waste residue from the Grignard process for phenyl monomer preparation, and controlling pH and temperature during centrifugation and distillation, the problems of magnesium salt complexation and hydrolysis in existing technologies were solved, achieving efficient and pollution-free recovery of magnesium chloride, and improving the yield of phenyl monomer and the recovery rate of raw materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUBEI XINGRUI SILICON MATERIAL CO LTD
- Filing Date
- 2023-12-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for treating waste residue from the Grignard process for preparing phenyl monomers have several drawbacks. These include the easy complexation of magnesium salts with phenyl monomers, the ineffective recovery of easily hydrolyzed raw materials and products from magnesium salts, the difficulty in controlling the process due to the disruption of coordination bonds by strong acid dissolution, and the challenge of high-precision distillation purification. Furthermore, improper treatment of the waste residue can easily pollute the environment.
The waste residue from the preparation of phenylalkoxysilane by the Grignard method was treated with ketone solvents such as acetone and methylchlorosilane. By controlling the pH value and temperature, the magnesium chloride, tetrahydrofuran and methyltrimethoxysilane were separated and recovered by centrifugation and distillation. The mother liquor of crystallization was recycled to achieve magnesium chloride recovery in an anhydrous environment.
It improves the yield of phenyl monomers and the recovery rate of raw materials, reduces processing costs, reduces environmental pollution, simplifies the process, and improves the purity and efficiency of magnesium chloride crystallization.