Method for preparing catalyst for hydrogenating pyridine compound and application thereof

A compound and catalyst technology, which is applied in the field of preparation of catalysts for hydrogenation of pyridine compounds, can solve problems such as low yield and harsh reaction conditions, and achieve the effects of high product conversion rate, easy availability of raw materials, and convenient recycling

Active Publication Date: 2013-11-20
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But all have the disadvantages of harsh reaction conditions and low yields

Method used

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  • Method for preparing catalyst for hydrogenating pyridine compound and application thereof
  • Method for preparing catalyst for hydrogenating pyridine compound and application thereof
  • Method for preparing catalyst for hydrogenating pyridine compound and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1. Add 10g of activated carbon to HNO with a concentration of 12mol / L 3 Soak in the solution for 2 hours, then wash the soaked activated carbon with deionized water to neutrality and filter to obtain pretreated activated carbon; the particle size of the activated carbon is 200 mesh to 300 mesh, and the specific surface area of ​​the activated carbon is 1000m 2 / g;

[0035] Step 2, dissolving ruthenium trichloride with a ruthenium content of 0.3 g and palladium chloride with a palladium content of 0.05 g in water, and stirring evenly to obtain 20 mL of a precursor solution;

[0036] Step 3: Weigh 9.65g of the pretreated activated carbon carrier described in step 1 and add it to the precursor solution described in step 2, impregnate for 2 hours under stirring conditions, and then adjust the pH value of the impregnation system to 9 with aqueous potassium hydroxide solution, After continuing to stir for 3h, filter to obtain a filter cake, which is washed with water un...

Embodiment 2

[0039] This embodiment is the same as Embodiment 1, except that the auxiliary agent is platinum, rhodium, cobalt or nickel, or two or more of palladium, platinum, rhodium, cobalt and nickel.

Embodiment 3

[0041] Step 1. Add 10g of activated carbon to HNO with a concentration of 15mol / L 3 Soak in the solution for 1 hour, then wash the soaked activated carbon with deionized water to neutrality and then filter to obtain pretreated activated carbon; the particle size of the activated carbon is 300 mesh to 400 mesh, and the specific surface area of ​​the activated carbon is 1500m 2 / g;

[0042] Step 2, dissolving ruthenium nitrate with a ruthenium content of 0.5 g, cobalt nitrate with a cobalt content of 0.05 g, and platinum chloride with a platinum content of 0.05 g in water, and stirring evenly to obtain 20 mL of a precursor solution;

[0043] Step 3: Weigh 9.4g of the pretreated activated carbon carrier described in step 1 and add it to the precursor solution described in step 2, impregnate for 1 hour under stirring conditions, and then adjust the pH value of the impregnation system to 10 with potassium hydroxide aqueous solution, After continuing to stir for 2h, filter to obtai...

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Abstract

The invention discloses a method for preparing a catalyst for hydrogenating a pyridine compound. The method comprises the following steps of: 1, pre-treating activated carbon; 2, preparing a precursor solution; 3, immersing the activated carbon by the precursor solution; 4, reducing, washing and drying to obtain the catalyst. The invention also discloses another method for preparing the catalyst for hydrogenating a pyridine compound, which comprises the following steps of: 1, pre-treating alumina; 2, preparing a precursor solution; 3, immersing the alumina by the precursor solution, drying, roasting and reducing to obtain the catalyst. According to the catalyst prepared by the invention, the activated carbon or activated alumina is used as a carrier, noble metal ruthenium and auxiliary metal element are loaded and highly dispersed on the carrier, and the granularity of ruthenium metal particles in the catalyst is 30nm-80nm. The prepared catalyst is suitable for catalytically hydrogenating pyridine compounds to synthesize piperidine compounds, the conversion rate of the catalytic hydrogenation reaction is high, and the production cost for the piperidine compounds can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of noble metal catalysts, and in particular relates to a preparation method and application of a catalyst for hydrogenation of pyridine compounds. Background technique [0002] Piperidine compounds are mainly used in the synthesis of pharmaceuticals, pesticides and rubber additives. In the pesticide industry, they are mainly used in the synthesis of the rice field herbicide Pizad. It is a selective non-hormone thiocarbamate herbicide and is very effective Prospects. In the pharmaceutical industry, it is used to synthesize acetyl roxatidine hydrochloride for digestive system drugs, dipyridamole for cardiovascular diseases, ethyl acetaminobenzoate and acetyl roxatidine hydrochloride for neurological drugs, etc. In the rubber additives industry, it is used to synthesize thiuram super vulcanization accelerators tetrasulfide bispentamethylene thiuram (TRA), disulfide bispentamethylene thiuram (PTD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/89B01J35/02C07D295/023C07D295/027
Inventor 李小虎冯先涛张之翔朱柏烨曾永康林涛谭小燕
Owner XIAN CATALYST NEW MATERIALS CO LTD
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