Catalyst for synthesizing cyclohexene by hydrogenation of benzene ring and preparing method thereof

A catalyst and cyclohexene technology, applied in the directions of catalyst activation/preparation, hydrogenation to hydrocarbons, chemical instruments and methods, etc., can solve the problems of loss of precious metal ruthenium, difficulty in precious metal recovery, etc., and achieve easy availability of raw materials, less loss, and production cycle. short effect

Inactive Publication Date: 2009-10-07
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN1597099A discloses a method of impregnation and precipitation, metal oxide ZrO 2 A ruthenium-based supported catalyst was prepared as a carrier, and the yield of cyclohexene can only

Method used

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Examples

Experimental program
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Effect test

Example Embodiment

[0023] Example 1

[0024] Weigh 9.50g of pretreated activated carbon, add it to 20mL precious metal ruthenium content 0.50g ruthenium trichloride aqueous solution, stir and immerse for 5 hours, then adjust the pH of the mixed slurry to 9.0 with alkaline potassium hydroxide aqueous solution, continue stirring for 3 After hours, filter, wash the filter cake with water to neutrality, after beating the filter cake with water, adjust the pH of the mixed slurry to 12.0 with alkaline potassium hydroxide aqueous solution, reduce the ruthenium carbon catalyst in liquid phase by adding potassium borohydride solution, and wash, The filter cake is transferred to an oven and dried at 100° C. for 5 hours to obtain a highly dispersed nano-ruthenium-carbon supported precious metal hydrogenation catalyst. The diameter of most ruthenium particles of the nano-Ru / activated carbon catalyst is 40-80nm.

Example Embodiment

[0025] Example 2

[0026] Weigh 9.50g of the pretreated activated carbon, add it to 20ml of a chloride aqueous solution with a precious metal ruthenium content of 0.40g and an auxiliary Co content of 0.10g, stirring and immersing for 5 hours, and then adjust the mixed slurry with an alkaline potassium hydroxide aqueous solution pH to 9.0, continue to stir for 3 hours, filter, wash the filter cake with water to neutrality, after beating the filter cake with water, adjust the pH of the mixed slurry to 12.0 with alkaline potassium hydroxide aqueous solution, by adding potassium borohydride solution liquid phase The ruthenium carbon catalyst is reduced, washed, and the filter cake is transferred to an oven and dried at 100° C. for 5 hours to obtain a highly dispersed nano ruthenium carbon supported precious metal hydrogenation catalyst. Most of the metal particles of the nano Ru-Co / activated carbon catalyst have a particle size of 40-80 nm.

Example Embodiment

[0027] Example 3

[0028] Weigh 9.50g of pretreated activated carbon and add it to 20ml of a chloride aqueous solution containing 0.45g of precious metal ruthenium and 0.05g of additive Pd, stirring and immersing for 5 hours, and then adjust the mixed slurry with alkaline potassium hydroxide aqueous solution. pH to 9.0, continue to stir for 3 hours, filter, wash the filter cake with water to neutrality, after beating the filter cake with water, adjust the pH of the mixed slurry to 12.0 with alkaline potassium hydroxide aqueous solution, by adding potassium borohydride solution liquid phase The ruthenium carbon catalyst is reduced, washed, and the filter cake is transferred to an oven and dried at 100° C. for 5 hours to obtain a highly dispersed nano ruthenium carbon supported precious metal hydrogenation catalyst. Most of the metal particles of the nano-Ru-Pd / activated carbon catalyst have a particle size of 40-80 nm.

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Abstract

The invention relates to a catalyst for synthesizing cyclohexene by hydrogenation of benzene ring and a preparing method thereof. The catalyst consists of activated carbon carrier, metal ruthenium and promoter; the promoter is one or the mixture of more than two from platinum, palladium, rhodium, cobalt and nickel. The method comprises the following steps: pretreated activated carbon is added into water-soluble compound solution of metal ruthenium or mixed water-soluble precursor solution of the metal ruthenium and the promoter so as to be stirred and soaked, thus obtaining mixed slurry; the PH value of the mixed slurry is regulated by alkali compound aqueous solution, after stirring and filtering, the filter cake is washed to neutrality by water, and then after the filter cake is beaten by water, the PH value of the mixed slurry is regulated by the alkali compound aqueous solution, then a chemical reducer is added to reduce ruthenium carbon catalyst in liquid phase, and after washing, the filter cake is transferred into an oven so as to be dried, thus obtaining the product of the ruthenium carbon catalyst. The catalyst has good catalytic activity and high selectivity and is especially suitable for catalytic hydrogenation for synthesizing cyclohexene by the hydrogenation of benzene ring, and the preparing method has simple operation and short production period.

Description

technical field [0001] The invention relates to a selective hydrogenation catalyst and a preparation method thereof, in particular to a benzene ring hydrogenation synthesis cyclohexene catalyst, a preparation method and application thereof. Background technique [0002] There is a lively double bond in the cyclohexene ring. As an important organic chemical raw material, it is widely used in the production of pharmaceuticals, pesticides, feed additives, polyesters and other fine chemical products. It can be directly oxidized to adipic acid. Wacker method oxidation to generate cyclohexanone, or direct hydration to generate cyclohexanol. Adipic acid, cyclohexanone and cyclohexanol are very important chemical raw materials. Cyclohexene is not a natural product and must be obtained through chemical synthesis, and hydrogenation of benzene is the best way to obtain it. In particular, the partial hydrogenation of the benzene ring of nylon 66 is safer and more reliable than the tra...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J23/89B01J37/02B01J37/16C07C13/20C07C5/11
CPCY02P20/52
Inventor 曾利辉张之翔曾永康杨乔森李岳峰谭小艳
Owner XIAN CATALYST NEW MATERIALS CO LTD
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