A method for continuous crystallization of azoxystrobin
By combining multi-stage crystallizers and particle size separation screens, the problems of uneven crystallization and impurity removal of pyraclostrobin were solved, achieving efficient and uniform crystal production and improving product quality and production efficiency.
CN117482561BActive Publication Date: 2026-06-02SHANGYU NUTRICHEM +2
Patent Information
- Application Number
- CN202311474067.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-07
- Publication Date
- 2026-06-02
- Estimated Expiration
- 2043-11-07
Smart Images
Figure CN117482561B_ABST
Abstract
The application discloses a kind of azoxystrobin continuous crystallization method, belong to pesticide fungicide technical field.It includes the following steps: first crystallizer, second crystallizer, third crystallizer, fourth crystallizer head-to-tail sequentially interconnect, and from top to bottom are set, the crystal slurry in the crystallizer utilizes height difference self-flow discharge;First, the concentration is 25-30% mass concentration of butyl acetate solution containing azoxystrobin is carried out to crystal operation;After the crystal of butyl acetate solution containing azoxystrobin is precipitated, butyl acetate solution containing azoxystrobin is added to first crystallizer, temperature control is at 53-57 ℃ temperature, stays for a certain time;Then the crystal slurry is overflowed or pumped into second crystallizer, third crystallizer, fourth crystallizer in sequence and is cooled and crystallized, the crystal slurry in fourth crystallizer is overflowed or pumped into transfer tank or centrifuge, and the product is obtained after the crystal slurry is post-treated.The particle size uniformity of the crystalline crystal obtained by the continuous crystallization method provided by the application.
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Citation Information
Patent Citations
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