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A kind of hydrogenation catalyst and its preparation method and application

A hydrogenation catalyst and catalyst technology, applied in chemical instruments and methods, through selective hydrorefining, metal/metal oxide/metal hydroxide catalysts, etc., can solve the sintering of active components and the deterioration of catalyst performance, etc. problems, resulting in improved dispersion, enhanced interactions, good selectivity, and long-term stability

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the high temperature process during calcination can also lead to sintering of the active components, making the performance of the catalyst worse

Method used

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  • A kind of hydrogenation catalyst and its preparation method and application
  • A kind of hydrogenation catalyst and its preparation method and application
  • A kind of hydrogenation catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take 50ml containing Pd0.6mg / mlPd(NO 3 ) 2 solution, impregnated to 100.0gAl 2 o 3 Spherical carrier (BET specific surface area 29.6m 2 / g), dry at 120°C for 10 hours; then use 50ml silver nitrate and palladium nitrate mixed solution containing Ag1.2mg / ml and Bi0.2mg / ml to impregnate the carrier, and dry at 120°C for 2h; / L of KOH solution to impregnate the carrier. Add 20ml of 50% v / v isopropanol aqueous solution to the impregnated carrier and use it under vacuum 60 The Coγ radiation source was irradiated at room temperature for 15 hours, and the absorbed dose rate was 35Gy / min. After irradiation, the samples were dried at 80°C and 120°C for 12 hours in sequence to obtain the catalyst A, which was gray in appearance, and the content of active components (relative to the mass of the carrier, the same below) was: Pd0.030wt%, Ag0.060wt% %, Bi0.010wt%.

Embodiment 2

[0044] The preparation method is the same as that in Example 1, except that the NaOH solution is used to impregnate the carrier after the Ag and Bi solutions are impregnated and dried. The catalyst B was obtained, its appearance was gray, and the content of active components was: Pd0.030wt%, Ag0.060wt%, Bi0.010wt%.

Embodiment 3

[0046] The preparation method is the same as in Example 1, the difference is that after impregnating the Pd solution and drying, first use 50ml of silver nitrate solution containing Ag1.2mg / ml to impregnate the carrier, and dry at 120°C for 2h; then use bismuth nitrate containing Bi0.2mg / ml The solution is impregnated with the carrier, and dried at 120°C for 2 hours. The obtained catalyst C has a gray appearance, and the content of active components is: Pd0.030wt%, Ag0.060wt%, Bi0.010wt%.

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Abstract

The invention discloses a selective hydrogenation catalyst. The catalyst comprises a carrier, a main active component Pd, and auxiliary active components Ag and Bi, wherein the main active component Pd and the auxiliary active components Ag and Bi are carried on the carrier. The catalyst is characterized in that XPS analysis is used; the percentage ratio of Pd and O atoms on the catalyst surface is 4*10<-4> to 30*10<-4>; the percentage ratio of Ag and O atoms is 15*10<-4> to 60*10<-4>; and the weight ratio of the auxiliary active component Bi to the main active component Pd is 0.01 to 5. When applied to selective hydrogenation reaction, the catalyst has good catalytic activity and excellent selectivity.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and its preparation method and application. Background technique [0002] In the field of petrochemicals, products such as ethylene, propylene and butene are usually produced by steam cracking, catalytic cracking or thermal cracking processes. In addition to the desired olefins and other products, the products obtained by these processes also contain a small amount of alkynes or dienes. These impurities are harmful to subsequent reactions such as polymerization and may cause explosion hazards. In industry, the selective catalytic hydrogenation method is usually used to remove the concentration of alkynes and dienes to a very low level (mole fraction <1×10 -6 ) to obtain polymer-grade products; at the same time, it can also increase the output of monoolefins and improve resource utilization. In the C4 fraction, according to the difference of the raw material and the demand for the product, sometimes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/68C07C7/167C07C7/163C07C11/04C10G45/40C10G70/02
CPCY02P20/52
Inventor 于海波毛祖旺乐毅穆玮刘海江彭晖戴伟
Owner CHINA PETROLEUM & CHEM CORP
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