Catalyst for synthesizing 2-cyanopyrazine and preparation and application methods thereof

Abstract

The invention discloses a catalyst for synthesizing 2-cyanopyrazine and preparation and application methods thereof and belongs to the field of preparation of catalysts. The catalyst is a CrVPO systemloaded type catalyst and a carrier is gamma-Al2O3, wherein the amount-of-substance ratio of active components is that Cr to V to P is equal to 0.8 to 1 to (0.8 to 2.6). The catalyst takes a gamma-Al2O3 raw material with low cost as the catalysis carrier, and the catalysis carrier is treated by utilizing a simple and feasible ultrasonic and rotary evaporation technology, so that a CrVPO-gamma Al2O3 catalyst which has a good catalytic effect on the synthesis of the 2-cyanopyrazine and has no production on subsequent production is obtained; the preparation method of the catalyst is simple, feasible, economical and practical and is convenient for industrial production; a test proves that the efficiency of synthesizing the 2-cyanopyrazine in micro-channel reaction of the catalyst prepared by the preparation method can reach 58.92 percent.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a catalyst for synthesizing 2-cyanopyrazine and its preparation and use method. Background technique [0002] 2-cyanopyrazine can be used as a pharmaceutical intermediate, one of the main drugs for the treatment of tuberculosis, and can also be used as a food-grade spice. At present, my country's 2-cyanopyrazine mainly depends on imports, and the synthesis and use of 2-cyanopyrazine are restricted. [0003] The preparation of 2-cyanopyrazine by gas-phase ammoxidation is currently the best method for preparing cyano compounds. Among them, the reaction raw material NH 3 , O 2 are easy to obtain, the most critical thing is to find a catalyst with high activity and high selectivity. According to the different reaction modes and reactors, the selected catalysts are also different, and the catalysts also have different costs. We take advantage of the advantages of microchannel ...

AI Technical Summary

Problems solved by technology

We take advantage of the advantages of microchannel reactors to synthesize 2-cyanopyrazine. This method can not only save raw materials, but also reduce the difficulty of production technology, but the use conditions of existing catalysts, such as temperature or time, are not related to micro The conditions for the synthesis of 2-cyanopyrazine in channel reactors are different, therefore, it is necessary to study a catalyst suitable for the synthesis of 2-cyanopyrazine in microchannel reactors

Images