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Catalyst for C4 fraction selective hydrogenation and removal of alkyne, and preparation method thereof

A technology for removing acetylene catalyst and selective hydrogenation, which is applied in catalyst activation/preparation, hydrocarbons, chemical instruments and methods, etc., can solve the problems of unsatisfactory catalyst selectivity and activity, shorten the preparation period and reduce energy consumption , the effect of less acetylene

Inactive Publication Date: 2011-11-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Most of the current patent documents use the method of doping modification as mentioned above to improve the selectivity of the Pd catalyst. The preparation of the catalyst adopts the traditional impregnation-roasting-reduction method, but the selectivity and activity of the obtained catalyst are still not ideal.

Method used

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  • Catalyst for C4 fraction selective hydrogenation and removal of alkyne, and preparation method thereof
  • Catalyst for C4 fraction selective hydrogenation and removal of alkyne, and preparation method thereof
  • Catalyst for C4 fraction selective hydrogenation and removal of alkyne, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Preparation of vector

[0056] Use lanthanum-modified alumina as the carrier, wherein the content of lanthanum in the carrier is 2%, the alumina is calcined at 1000°C, and the specific surface area of ​​the carrier is measured to be 155m 2 / g.

Embodiment 2

[0058] Preparation of Catalyst A

[0059] Configuration pH value is 1.4, concentration is the palladium nitrate solution 70ml of 2.86mgPd / ml (PH uses 1mol / l sodium hydroxide solution to regulate), takes by weighing the aluminum oxide carrier 100g in the embodiment 1, to the aluminum oxide carrier spraying configured Palladium nitrate solution, after standing for 20 minutes, take the mixed solution prepared by 20ml deionized water and 20ml isopropanol, pour it into the carrier that is loaded with Pd, pour out the excess solution after uniform dispersion. Use the product under vacuum 60 The Coγ radiation source was irradiated for 15 hours at a dose rate of 30Gy / min. The irradiated sample was dried at 120° C. for 6 hours to obtain catalyst A with a Pd content of 0.2%.

Embodiment 3

[0064] Preparation of Catalyst B

[0065] First spray the sodium carbonate solution on the 100g alumina carrier in Example 1, dry it and place it in an oven at 120°C for 12 hours; then configure 70ml of bismuth nitrate solution with a concentration of 20.29mg Bi / ml, spray it Put it on the above carrier, dry it in the oven at 120°C for 12 hours, then configure palladium nitrate (concentration 2.86mg Pd / ml), silver nitrate (concentration 1.57mg Ag / ml) and zinc nitrate (concentration 3.86mg Zn / ml) of the mixed solution 70ml, which is sprayed on the above-mentioned dried particle pellets, after standing for 20 minutes, the mixed solution prepared by 20ml water and 20ml isopropanol is poured into the pellets loaded with Pd, After uniform dispersion, the excess solution was decanted. Use the product under vacuum 60 The Coγ radiation source was irradiated for 15 hours at a dose rate of 30Gy / min. The irradiated sample was dried at 120°C for 12 hours to obtain Catalyst B with a Pd ...

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Abstract

The invention discloses a catalyst for C4 fraction selective hydrogenation and removal of alkyne, and a preparation method thereof. A main metal active component precursor loaded on a carrier and assistant metal component precursors loaded on the carrier are reduced through ionizing radiation to prepared the unsaturated hydrocarbon hydrogenation catalyst provided by the present invention. The main metal active component precursor comprises Pd, wherein the Pd content is 0.01 (wt)%-2.00 (wt)% of the total weight of the carrier. The assistant metal component precursors comprise: (1) at least one selected from Cu, Co, Ag, Cr, Bi, Sn, Pb, Ga, Zn, Sb and Tl, wherein the metal content is 0.005 wt%-30.0 wt% of the total weight of the carrier; (2) optional one or a plurality of metals selected from Na, K, Mg, Ca and Ba, wherein the metal content is 0.005 wt%-5.0 wt% of the total weight of the carrier. The catalyst has advantages of high activity, high selectivity, no requirement of pre-reduction through hydrogen, direct use and the like.

Description

technical field [0001] The invention relates to a selective hydrogenation catalyst for petroleum hydrocarbon products and a preparation method thereof, more specifically, to a catalyst for the selective hydrogenation of C4 fractions and a preparation method thereof. Background technique [0002] 1,3-Butadiene is an important chemical raw material for the production of synthetic rubber. Cracking mixed C4 contains about 40-50% 1,3-butadiene, which is the main source of butadiene. At present, the process of separating butadiene from mixed carbon four mainly adopts two-stage solvent extraction and rectification, wherein one stage separates butene, butane, etc. from crude butadiene, and the second stage separates alkynes ( Including vinyl acetylene (VA), ethyl acetylene (MA) and methyl acetylene (MA)) removal, followed by rectification and purification to obtain polymer grade butadiene. The disadvantages of this process are high energy consumption, high material loss and low pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J23/68B01J23/89B01J23/62B01J37/34C07C11/167C07C7/167
Inventor 杨栋戴伟乐毅徐立英彭晖穆玮朱云仙于海波毛祖旺石瑞红卢红亮刘海江高树升汪晓菁
Owner CHINA PETROLEUM & CHEM CORP
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