苯并三氮唑针状晶体的制备方法
By using a method of coordinated control of vacuum flash evaporation and alternating electric field, the problems of high energy consumption, uncontrollable morphology, and unstable purity in the preparation of benzotriazole needle crystals in the prior art have been solved, and the preparation of benzotriazole needle crystals with low energy consumption, high purity, and controllable morphology has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU YANGNONG CHEMICAL GROUP CO LTD
- Filing Date
- 2026-05-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods for preparing benzotriazole needle crystals suffer from problems such as high energy consumption, uncontrollable crystal morphology, unstable purity and color, low solvent circulation efficiency, and impurity accumulation.
A method combining vacuum flash evaporation and alternating electric field control is adopted. Adiabatic flash evaporation and pressure-controlled crystallization are carried out in a highly soluble organic solvent. During the crystallization stage, an alternating electric field is applied to induce molecular orientation, promote the preferential growth of crystals along the direction of the electric field, and suppress disordered nucleation and impurity entrainment.
A method for preparing benzotriazole needle-like crystals with low energy consumption, high purity, and controllable morphology was achieved. The average length is ≥70 μm, the aspect ratio is ≥6.5, the metal ion residue is ≤8 mg·kg-¹, and the purity is ≥97.9%, which is suitable for continuous production.
Smart Images
Figure CN122167369B_ABST