Method for preparing 2-cyanopyridine by fixed bed sectional temperature control

By employing segmented temperature control technology in a fixed-bed reactor, the problems of uneven temperature and side reactions in the catalytic synthesis of 2-cyanopyridine were solved, achieving high yield and high conversion of 2-cyanopyridine and reducing production costs.

CN121471136APending Publication Date: 2026-02-06NANTONG ACETIC ACID CHEM +1
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Patent Information

Application Number
CN202511702245.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-19
Publication Date
2026-02-06

AI Technical Summary

Technical Problem

Existing technologies for the catalytic synthesis of 2-cyanopyridine suffer from problems such as uneven bed distribution, uneven temperature distribution, high by-product content, and high production costs. In particular, in single-layer fixed-bed reactors, uneven reaction and side reactions are prone to occur.

Method used

By employing a fixed-bed segmented temperature control method, the reaction is controlled in multiple catalytic beds at different temperatures. Through precise temperature control, side reactions are reduced and the product yield is improved.

Benefits of technology

High yield (≥90%) and high conversion (>99.9%) of 2-cyanopyridine were achieved, by reducing byproduct formation, extending catalyst lifetime, and improving reaction selectivity.

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Abstract

The invention discloses a method for preparing 2-cyanopyridine through fixed bed sectional temperature control, and belongs to the field of chemical engineering. The invention discloses a method for preparing 2-cyanopyridine by sectional temperature control of a fixed bed, which is characterized in that the reaction is controlled in a catalytic bed at multiple sections of different temperatures, the bed temperature is controlled, and side reactions are reduced, so that the yield of the prepared 2-cyanopyridine is more than or equal to 90%, the conversion rate of 2-methylpyridine is more than 99.9%, and the reaction selectivity is more than 90%.
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