Catalyst as well as preparation and application thereof

A technology of catalysts and additives, applied in physical/chemical process catalysts, chemical instruments and methods, ammonia-carboxylic acid reaction preparation, etc. Long, selective and active effect

Active Publication Date: 2015-04-29
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the method disclosed in this patent avoids the use of dehydrating agents such as phosphorus oxychloride that pollute the environment, and nitrogen-containing solvents such as N-methylpyrrolidone, the catalyt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Pseudoboehmite (Al 2 o 3 Add 300.0g of 300.0g in batches (15g per batch, interval of 2-3min) to 471.2g of concentrated phosphoric acid (concentration: 85.54%) uniformly stirred at 50°C, dry to constant weight after addition, and grind , sieved. Add 18.4g of turnip powder, 3.1g of hydroxymethyl cellulose, 12.3g of nitric acid (concentration 15wt%), and 110.4g of deionized water into the above-mentioned sieved powder, knead and extrude into φ3 (3-5mm ) clover-shaped catalyst particles, dried to constant weight. Put it into a muffle furnace, raise the temperature to 300°C at a heating rate of 2.5°C / min, keep it for 2 hours, and then raise the temperature to 600°C for 4 hours. Put the calcined catalyst in a quartz tube, put it into a tubular heating furnace, set the temperature at 450°C, and after reaching the temperature, follow the 1.0h -1 Pump in deionized water at a certain space velocity, treat for 4 hours, take it out and dry it to constant weight to obtain the ca...

Embodiment 2

[0038] Add 1.5kg of aluminum nitrate nonahydrate in batches (50g per batch, interval of 2-3min) into 471.2g of concentrated phosphoric acid (concentration: 85.54%) uniformly stirred at 50°C, dry to constant weight after addition, and grind , sieved. Add 18.4g of turnip powder, 12.3g of nitric acid (concentration 15wt%), and 110.4g of deionized water into the above-mentioned sieved powder, knead and extrude into clover-shaped catalyst particles of φ3 (3-5mm), and dry to constant weight. Put it into a muffle furnace, raise the temperature to 300°C at a heating rate of 2.5°C / min, keep it for 2 hours, and then raise the temperature to 600°C for 4 hours. Put the calcined catalyst in a quartz tube, put it into a tubular heating furnace, set the temperature at 450°C, and after reaching the temperature, follow the 1.0h -1 Pump in deionized water at a certain space velocity, treat for 4 hours, take it out and dry it to constant weight to obtain the catalyst.

Embodiment 3

[0040]Add 321.2g of aluminum hydroxide powder in batches (16g per batch, interval of 2-3min) into 471.2g of concentrated phosphoric acid (concentration: 85.54%) uniformly stirred at 50°C, dry to constant weight after addition, and grind , sieved. Add 18.4g of turnip powder, 12.3g of nitric acid (concentration 15wt%), and 110.4g of deionized water into the above-mentioned sieved powder, knead and extrude into clover-shaped catalyst particles of φ3 (3-5mm), and dry to constant weight. Put it into a muffle furnace, raise the temperature to 300°C at a heating rate of 2.5°C / min, keep it for 2 hours, and then raise the temperature to 600°C for 4 hours. Put the calcined catalyst in a quartz tube, put it into a tubular heating furnace, set the temperature at 450°C, and after reaching the temperature, follow the 1.0h -1 Pump in deionized water at a certain space velocity, treat for 4 hours, take it out and dry it to constant weight to obtain the catalyst.

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PUM

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Abstract

The invention belongs to the field of preparation of catalysts, and relates to a catalyst as well as preparation and application thereof. The catalyst consists of a precursor and an auxiliary and is obtained by hydro-thermal treatment; according to the percentage by weight, the precursor is 70-90 percent, and the auxiliary is 10-30 percent; the precursor is formed by adding a phosphorus source into deionized water to agitate and dissolve and adding a screened aluminum source after dissolution and drying till the weight is constant. The catalyst has the advantages of high activity, good selectivity, long service life and the like, thereby having good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and relates to a catalyst and its preparation and application. Background technique [0002] Salicylonitrile, also known as o-hydroxybenzonitrile, has the molecular formula C 7 h 5 NO, the molecular weight is 119.12, and the CAS number is 611-20-1. The melting point of general industrial products is 95-98°C, the melting point of pure products is 102-105°C, and the boiling point is 149°C / 1.9kPa (14mmHg). It has certain water solubility and is unstable to strong alkalis or strong oxidants. As a pharmaceutical intermediate, it can be used in the preparation of Bunirolol; as a pesticide intermediate, it is an essential intermediate for the preparation of methoxyacrylate fungicide azoxystrobin. In addition, salicylonitrile can also be used as an intermediate in the synthesis of many perfumes and liquid crystal materials. [0003] At present, salicylonitrile production techniques include salicyl...

Claims

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Application Information

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IPC IPC(8): B01J27/14C07C255/53C07C253/22
Inventor 闫海生尹荃曲旭坡陈二中李丽刘冰
Owner SHENYANG RES INST OF CHEM IND
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