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Preparation method of palladium hydrogenation catalyst, catalyst prepared through the method and method for preparing piperidine through catalyst

A hydrogenation catalyst and catalyst technology, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problem of high catalyst preparation cost, and achieve good dispersion and reaction The effect of mild conditions and low energy consumption

Active Publication Date: 2016-06-29
BEIJING RISUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The order of hydrogenation activity for substrates with different substituents is as follows: 2-methylpyridine>2,6-lutidine>pyridine. The preparation cost of this catalyst is relatively high and it is not suitable for industrial production (Zhang Ye et al., Acta Physicochemical Sinica, 2009, 25(11): 2270-2274)

Method used

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  • Preparation method of palladium hydrogenation catalyst, catalyst prepared through the method and method for preparing piperidine through catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of the palladium hydrogenation catalyst supported by the hybrid carbon carrier of embodiment 1

[0031] Weigh 20g of coal-based activated carbon with a particle size of 400 mesh (about 37 microns), place it in a flask, add 100ml of nitric acid with a concentration of 20%, soak it at 60°C for 12 hours, filter the treated activated carbon, and wash until neutral , placed in a vacuum drying oven, and dried at 80°C to obtain pretreated activated carbon.

[0032] Measure 20ml of 0.2M palladium chloride hydrochloric acid solution and dilute to 100ml to obtain solution a, weigh 2.9g nickel acetate, dissolve 2g sucrose in solution a to obtain solution b, add the above-mentioned pretreated activated carbon and solution b to a 200ml autoclave, Stir, raise the temperature to 150°C at a heating rate of 5°C / min, keep it for 12 hours, take out the product, filter it, wash until it is neutral, put it in a vacuum drying oven, and dry it at 80°C to obtain a catalyst prec...

Embodiment 2

[0034] A catalyst was prepared in the same manner as in Example 1 except that 4 g of sucrose was used instead of 2 g of sucrose.

Embodiment 3

[0036] A catalyst was prepared in the same manner as in Example 1 except that 6 g of sucrose was used instead of 2 g of sucrose.

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Abstract

The invention provides a preparation method of a palladium hydrogenation catalyst, the catalyst prepared through the method and a method for preparing piperidine through the catalyst. The preparation method comprises the following steps that firstly, active carbon is smashed and immersed in a pretreatment reagent and then filtered, washed and dried; secondly, a palladium, nickel and saccharose solution is prepared; thirdly, the hydrothermal reaction is conducted, then, filtering and washing are conducted, a catalyst precursor is obtained after vacuum drying, is roasted in the inert atmosphere and naturally cools, and after passivation, the supported catalyst is obtained. The prepared catalyst is mainly used for pyridine selectivity catalytic hydrogenation, and the conversion rate and selectivity of the catalyst can reach 98-100% and 99-99.99% respectively. The palladium hydrogenation catalyst further has the advantages that stability is good, and the preparation method is simple.

Description

technical field [0001] The present invention relates to a kind of preparation method of palladium hydrogenation catalyst, the catalyst prepared by this method, and the method for using this catalyst to prepare piperidine, specifically, the present invention relates to a kind of preparation of palladium catalyst supported by a hybrid carbon carrier of shaping The method, the shaped hybrid carbon support palladium catalyst prepared by the method, and the method for preparing piperidine using the catalyst. Background technique [0002] Piperidine is a widely used chemical product and pharmaceutical intermediate. It is a colorless and transparent liquid with a special smell and a soapy feel. It can be used as a solvent for polyacrylonitrile spinning and other organic synthesis reactions, a catalyst for the reaction of active methylene and aldehydes and olefin polymerization, a curing agent for epoxy resins and a preservative for steam equipment, and diazo for synthetic fiber dye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/03B01J23/89B01J35/02C07D211/02C07D211/06B01J35/00
CPCC07D211/02C07D211/06B01J21/18B01J23/892B01J37/035B01J35/50
Inventor 张英伟刘全遥刘小晨陈文月吴园斌
Owner BEIJING RISUN TECH CO LTD
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