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Preparation method of 2-cyanopyridine catalyst

A cyanopyridine and catalyst technology, which is applied in the field of preparation of 2-cyanopyridine catalysts, can solve the problem that the yield of 2-cyanopyridine is only 61%, and achieve novel and unique preparation methods, ingenious ideas, and improved selectivity and the effect on yield

Pending Publication Date: 2021-03-26
CHINA CATALYST HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ɑ-VOPO 4 As a catalyst, 2-picoline is subjected to ammoxidation at 430°C to convert it into 2-cyanopyridine. Although the conversion rate of 2-picoline is as high as 90%, the yield of 2-cyanopyridine is only 61%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of 2-cyanopyridine catalyst, the steps are as follows:

[0023] (1) Mix 3150g of titanium dioxide, 882g of alumina and 90g of succulent powder to obtain material A, and use a kneader to knead material A for 2h;

[0024] (2) 452.2g of oxalic acid, 456.75g of ammonium metavanadate, 270.4g of ammonium molybdate and 1050g of deionized water were stirred at 50°C and added dropwise with a concentration of 65% nitric acid to pH=3 to obtain material B, The material continued to stir for 1h at this temperature;

[0025] (3) 31.5g of oxalic acid, 42g of ammonium oxalate, 13.44g of antimony trioxide and 315g of deionized water were stirred at 60°C and added dropwise with a concentration of 65% nitric acid to pH=4 to obtain material C, Continue 1h at this temperature;

[0026] (4) the B material after the step (2) treatment is mixed with the C material after the step (3) treatment and stir for 20min;

[0027] (5) adding the B material and C material mixture ...

Embodiment 2

[0031] A preparation method of 2-cyanopyridine catalyst, the steps are as follows:

[0032] (1) Mix 3150g of titanium dioxide, 882g of alumina and 90g of succulent powder to obtain material A, and use a kneader to knead material A for 2h;

[0033] (2) 452.2g of oxalic acid, 456.75g of ammonium metavanadate, 270.4g of ammonium molybdate and 1050g of deionized water were stirred at 50°C and added dropwise with a concentration of 65% nitric acid to pH=3 to obtain material B, The material continued to stir for 1h at this temperature;

[0034] (3) 31.5g of oxalic acid, 42g of ammonium oxalate, 13.44g of antimony trioxide and 315g of deionized water were stirred at 70°C and added dropwise with a concentration of 65% nitric acid to pH=4 to obtain material C, and material C was Continue 1h at this temperature;

[0035] (4) the B material after the step (2) treatment is mixed with the C material after the step (3) treatment and stir for 20min;

[0036] (5) adding the B material and ...

Embodiment 3

[0040] A preparation method of 2-cyanopyridine catalyst, the steps are as follows:

[0041] (1) Mix 3150g of titanium dioxide, 882g of alumina and 90g of succulent powder to obtain material A, and use a kneader to knead material A for 2h;

[0042] (2) 452.2g of oxalic acid, 456.75g of ammonium metavanadate, 270.4g of ammonium molybdate and 1050g of deionized water were stirred at 50°C and the concentration of 65% nitric acid was added dropwise to pH=3 to obtain material B. The material continued to stir for 1h at this temperature;

[0043] (3) 31.5g of oxalic acid, 42g of ammonium oxalate, 13.44g of antimony trioxide and 315g of deionized water were stirred at 70° C. and added dropwise with a concentration of 65% nitric acid to pH=4 to obtain C material, and C material Continue 1h at this temperature;

[0044] (4) the B material after the step (2) treatment is mixed with the C material after the step (3) treatment and stir for 20min;

[0045] (5) adding the B material and C...

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Abstract

The invention discloses a preparation method of a 2-cyanopyridine catalyst. The preparation method comprises the following steps: (1) preparing a material A, a material B and a material C, wherein thematerial A comprises titanium dioxide, aluminum oxide and sesbania powder, and the material B comprises oxalic acid, ammonium metavanadate, ammonium molybdate and deionized water; the material C comprises oxalic acid, ammonium oxalate, antimonous oxide and deionized water; (2) respectively pretreating the material A, the material B and the material C; (3) mixing the pretreated material B with thepretreated material C, and stirring for 20 minutes; (4) adding the mixture of the material B and the material C in the step (3) into the pretreated material A, and kneading for 1-2h by using a kneading machine; and (5) carrying out extrusion molding, drying, and roasting under a ventilation condition to obtain the 2-cyanopyridine catalyst. The catalyst prepared by the method can improve the selectivity and yield of 2-cyanopyridine, and the preparation cost is low.

Description

technical field [0001] The invention relates to the technical field of catalyst processing, in particular to a preparation method of a 2-cyanopyridine catalyst. Background technique [0002] Aromatic cyano compound (aromatic nitrile) is an important raw material for the production of pesticides, fragrances, medicines, fuel additives, etc. It can obtain fine chemicals such as amides, carboxylic acids, organic amines, and functional materials through hydrolysis, hydrogenation, polymerization and other reactions. . 2-cyanopyridine is an important chemical raw material and organic intermediate. It is widely used in fine chemical industries such as pesticides, food, and feed additives. The new herbicide picloram synthesized from 2-cyanopyridine has low dosage and high selectivity. , low toxicity, less residue in soil and plants, and short residual period. 2-cyanopyridine can be used to synthesize chromium picolinate, which has been basically used in aquaculture, and has achieve...

Claims

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Application Information

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IPC IPC(8): B01J23/28C07D213/84
CPCB01J23/28C07D213/84
Inventor 张旭旺史振宇孙小惠李进王贤彬王炳春
Owner CHINA CATALYST HLDG CO LTD
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