Selective hydrogenation catalyst and preparation method

A technology for selective hydrogenation and catalysts, applied in hydrogenation hydrocarbon production, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low activity and selectivity, complex hydrogenation process, and operating costs Advanced problems, to achieve the effect of simple preparation method, high hydrogenation activity and selectivity, and low cost

Inactive Publication Date: 2013-03-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent publication CN1793089A discloses a mixed catalyst system for the hydrogenation of α-methylstyrene into cumene, which system includes the use of a nickel-based catalyst in the first fixed-bed catalytic reaction to make 70~100% of α-methylstyrene 95% is converted into cumene, and a noble metal catalyst is used in the second fixed bed catalytic reaction to convert α-methylstyrene into cumene, but the hydrogenation process is complicated and the operating cost is high
[0008] In Chinese patent application 200910081664.4, the present inventor discloses a catalyst for selective hydrogenation of petroleum hydrocar

Method used

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  • Selective hydrogenation catalyst and preparation method
  • Selective hydrogenation catalyst and preparation method

Examples

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Effect test

Embodiment 1

[0032] 2000 milliliters of mixed glue solution that is respectively 20.6 grams of aluminum sulfate and 103.0 grams of sodium silicate (aluminum oxide / silicon oxide weight ratio is 1 / 5) in terms of aluminum oxide and silicon oxide, at a temperature of 50 ° C and a pH value of 6.0. Under normal pressure and strong stirring conditions, add 1000 ml of nickel nitrate aqueous solution with a content of 76.4 g in terms of nickel oxide to the above mixed glue, settle for 30 minutes, filter, and use 10 times the volume of the filter cake with deionized water Wash for 40 minutes, filter, wash again, filter again, and this process is repeated four times.

[0033] The filter cake was dried at 100°C for 10 hours, calcined at 450°C for 8 hours, cooled to room temperature, ground into powder, and punched into flakes to obtain catalyst A-1 of the present invention. See Table 1 for the data.

Embodiment 2

[0035] 2000 milliliters of mixed glue solution that is respectively 24.55 grams of aluminum sulfate and 73.64 grams of sodium silicate (aluminum oxide / silicon oxide weight ratio is 1 / 3) in terms of alumina and silica, at a temperature of 60 ° C and a pH value of 7.0. Under normal pressure and strong stirring conditions, add 1000 ml of nickel nitrate aqueous solution with a content of 101.81 g in terms of nickel oxide to the above mixed glue, settle for 30 minutes, filter, and use 10 times the volume of the filter cake with deionized water Wash for 40 minutes, filter, wash again, filter again, and this process is repeated four times.

[0036] The filter cake was dried at 100° C. for 10 hours, calcined at 500° C. for 5 hours, cooled to normal temperature, ground into powder, and made into a column to obtain catalyst A-2 of the present invention. See Table 1 for the data.

Embodiment 3

[0038]2000 milliliters of mixed glue solution with a content of 28.49 grams of aluminum sulfate and 56.98 grams of sodium silicate (alumina / silicon oxide weight ratio is 1 / 2) in terms of alumina and silica, at a temperature of 70 ° C and a pH value of 6.0 , under normal pressure and strong stirring conditions, 1000 ml of nickel nitrate aqueous solution with a content of 114.53 grams in terms of nickel oxide was added to the above-mentioned alumina-silica gel solution, precipitated for 40 minutes, filtered, and removed with 20 times the volume of the filter cake. Wash with deionized water for 40 minutes, filter, wash again, and filter again, and this process is repeated four times.

[0039] The filter cake was dried at 100° C. for 10 hours, calcined at 500° C. for 5 hours, cooled to normal temperature, ground into powder, and punched into flakes to obtain catalyst A-3 of the present invention. See Table 1 for the data.

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Abstract

The invention relates to a selective hydrogenation catalyst, which adopts alumina-silica as a carrier, is supported by an active component of nickel (Ni); the weight ratio of alumina/silica is 1/5-1/2; the content of the active component of nickel (Ni) on a nickel atom basis is 20-50 wt% of the weight of the catalyst, preferably 30-45%. The invention also relates to a preparation method of the selective hydrogenation catalyst. The catalyst of the invention is used for hydrogenation of methyl-alpha-methyl styrene and alpha-methyl styrene, and has the characteristics of high activity and selectivity, and good stability.

Description

technical field [0001] The invention relates to a petroleum hydrocarbon olefin hydrogenation catalyst, in particular to a selective hydrogenation catalyst. The present invention also relates to a method for preparing the above-mentioned catalyst. Background technique [0002] Methyl-alpha-methyl styrene is the main component of the light tar by-product in the production of m-cresol. In the annual production of 12,000 tons of m-cresol and 8,000 tons of 2,6-di-tert-butyl-p-cresol, The output of light tar by-products is 1.0-1.2 tons / m-cresol and 1.2-1.5 tons / p-cresol, and the light tar by-products are rich in cumene (50-60wt%) and methyl-α-methylbenzene Ethylene (20-30wt%) and light tar by-products are cut and separated, and 88-90wt% of the product is extracted for hydrofining, so that methyl-α-methylstyrene is converted into cumene, and returned to the oxidation unit for oxidation , reproducing m-cresol or p-cresol can greatly reduce the material consumption of the device an...

Claims

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Application Information

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IPC IPC(8): B01J23/755C07C15/02C07C5/03
Inventor 柴忠义杜周纪玉国任玉梅季静
Owner CHINA PETROLEUM & CHEM CORP
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