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Nano ruthenium carbon-supported metal hydrogenating catalyst and method for producing the same

A hydrogenation catalyst and carbon-supported technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low catalytic activity and selectivity, and achieve Reduce the effect of pollution, not easy to desorb and lose, and easy to operate

Inactive Publication Date: 2009-08-12
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a hydrogenation reaction of pyridine and its derivatives with high efficiency in view of the disadvantages of low catalytic activity and selectivity of existing catalysts used in the hydrogenation reaction of pyridine and its derivatives. Catalytic activity and high selectivity of nano-ruthenium carbon-supported metal hydrogenation catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 10 g of pretreated activated carbon, add it to 20 mL of ruthenium trichloride aqueous solution containing 0.5 g ruthenium trichloride, stir and impregnate for 5 hours, then adjust the pH of the mixed slurry to 9 with alkaline potassium hydroxide aqueous solution, and continue stirring for 3 hours , filtered, the filter cake was washed with water to neutrality, after the filter cake was beaten with water, the pH of the mixed slurry was adjusted to 9 with an alkaline potassium hydroxide aqueous solution, and the ruthenium carbon catalyst was reduced in liquid phase by adding potassium borohydride solution, washed, filtered The cake was transferred to an oven and dried at 100° C. for 5 hours to obtain a highly dispersed nano-ruthenium carbon-supported noble metal hydrogenation catalyst. Most of the ruthenium particle diameters of the nano-Ru / activated carbon catalyst are smaller than 40-80nm.

Embodiment 2

[0026] Weigh 10g of pretreated activated carbon, add it to 20mL precious metal ruthenium content of 0.5g ammonium chlororuthenate aqueous solution and stir and impregnate for 5 hours, then adjust the pH of the mixed slurry to 9 with alkaline potassium hydroxide aqueous solution, and continue to stir for 3 hours , filtered, the filter cake was washed with water to neutrality, after the filter cake was beaten with water, the pH of the mixed slurry was adjusted to 9 with an alkaline potassium hydroxide aqueous solution, and the ruthenium carbon catalyst was reduced in liquid phase by adding potassium borohydride solution, washed, filtered The cake was transferred to an oven and dried at 100° C. for 5 hours to obtain a highly dispersed nano-ruthenium carbon-supported noble metal hydrogenation catalyst. Most of the ruthenium particle diameters of the nano-Ru / activated carbon catalyst are smaller than 40-80nm.

Embodiment 3

[0028] Weigh 10 g of pretreated activated carbon, add 20 mL of precious metal ruthenium to 0.5 g of ruthenium trichlorohexammonium ruthenium aqueous solution, stir and impregnate for 5 hours, then adjust the pH of the mixed slurry to 9 with alkaline potassium hydroxide aqueous solution, and continue stirring for 3 hour, filter, the filter cake is washed with water to neutrality, after the filter cake is beaten with water, the pH of the mixed slurry is adjusted to 9 with an alkaline potassium hydroxide aqueous solution, and the ruthenium carbon catalyst is reduced by adding a potassium borohydride solution in a liquid phase, and washed, The filter cake was transferred to an oven and dried at 100° C. for 5 hours to obtain a highly dispersed nano-ruthenium carbon-supported noble metal hydrogenation catalyst. Most of the ruthenium particle diameters of the nano-Ru / activated carbon catalyst are smaller than 40-80nm.

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Abstract

The invention relates to a nano ruthenium-carbon loaded metal hydrogenation catalyst and a preparation method thereof. The catalyst consists of an active carbon carrier and metal ruthenium loaded on the active carbon and subjected to reduction activation treatment. The preparation method for the catalyst comprises the following steps: after the active carbon is subjected to ultrasonic treatment by nitric acid solution with a certain concentration, repeatedly using deionized water to wash the active carbon to be neutral, adding the active carbon into water-soluble precursor solution of the metal ruthenium, stirring and soaking the active carbon, then adjusting the pH value of mixed slurry by using alkaline compound aqueous solution, continuously stirring the solution for certain time, filtering the solution, washing a filter cake by water to be neutral, pulping the filter cake by water, adjusting the pH value of the mixed slurry by using the alkaline compound aqueous solution, adding the liquid-phase reduction ruthenium-carbon catalyst of a chemical reducing agent into the solution, washing the filter cake, transferring the filter cake to an oven and drying the filter cake to obtain the nano ruthenium-carbon loaded metal hydrogenation catalyst. The catalytic activity of the catalyst is good, the selectivity is high, the catalyst is particularly applicable to catalytic hydrogenation reaction of pyridine and derivatives thereof, the preparation method is simple to operate, and the production period is short.

Description

technical field [0001] The invention relates to a selective hydrogenation catalyst and a preparation method thereof, in particular to a nano-ruthenium carbon-loaded metal hydrogenation catalyst capable of catalytically hydrogenating pyridine and its derivatives into piperidine compounds and a preparation method thereof. Background technique [0002] Pyridine is an important heterocyclic compound, mainly used in the pharmaceutical industry to produce sulfonamides, odorless toxins, vitamin A, cortisone, insecticides, local anesthetics, etc. Rubber accelerators, paint solvents, and condensation agents for synthetic resins are also used in the manufacture of vinylpyridine, pesticides, herbicides, etc. The hydrogenation product of pyridine is piperidine. Piperidine, also known as hexahydropyridine or azacyclohexane, is widely used in the manufacture of local anesthetics, painkillers, fungicides, wetting agents, curing agents for epoxy resins, rubber vulcanization accelerators, e...

Claims

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Application Information

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IPC IPC(8): B01J23/46C07D295/023
Inventor 曾利辉张之翔曾永康杨乔森谭小艳李岳峰潘丽娟
Owner XIAN CATALYST NEW MATERIALS CO LTD
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