C4 selective hydrogenation catalyst and preparation method thereof

A technology for selective hydrogenation and catalyst, applied in catalyst activation/preparation, hydrocarbons, chemical instruments and methods, etc., can solve the problem of difficult to accurately control the palladium content of the catalyst, insufficient adhesion of the catalytic active coating, and metal particles in the reaction medium. pollution and other problems, to achieve the effect of shortening the preparation cycle, suitable for large-scale production, and reducing the emission of gas pollutants

Active 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

Although the palladium hydrogenation catalyst prepared by electroless plating does not need to be reduced by hydrogen, it needs multiple sensitization and activation steps. This method not only wastes a large amount of palladium solution, but also is not easy to accurately control the palladium content on the catalyst. Insufficient adhesion of the catalytically active coating, which is reflected in the shedding of palladium metal particles when the catalyst is cleaned after production and during use in the catalytic hydrogenation process, which may lead to the gradual deactivation of the catalyst and the reaction medium is covered with metal particle pollution

Method used

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  • C4 selective hydrogenation catalyst and preparation method thereof
  • C4 selective hydrogenation catalyst and preparation method thereof
  • C4 selective hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of vector

[0056] Using lanthanum-modified alumina as the carrier, wherein the content of lanthanum in the carrier is 2%, the alumina is calcined at 1190°C, and the specific surface area of ​​the carrier is determined to be 39m 2 / g.

Embodiment 2

[0058] Preparation of Catalyst A

[0059] Preparation 70ml pH is the palladium chloride solution (using sodium carbonate solution to adjust its pH value) of 4.0, takes by weighing the aluminum oxide carrier 100g among the embodiment 1, to the palladium chloride solution that the aluminum oxide carrier sprays configuration, leave standstill 20 Minutes later, take a mixed solution prepared by 20ml of deionized water and 20ml of isopropanol, pour it into the carrier loaded with Pd, disperse evenly, and pour out the excess solution. Use the product under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120° C. for 6 h to obtain catalyst A with a Pd content of 0.30 wt%.

Embodiment 3

[0061] Preparation of Catalyst B

[0062] Preparation 70ml pH is the palladium chloride solution (using sodium carbonate solution to adjust its pH value) of 4.0, takes by weighing the alumina carrier 100g among the embodiment 1, sprays the configured palladium chloride solution to the alumina carrier, after drying Place in an oven at 120°C to dry for 24 hours, then configure 70ml of silver nitrate solution (silver content is 0.50%), spray the configured palladium chloride solution to the alumina carrier containing palladium, let it stand for 20 minutes, and take 20ml The mixed solution prepared by water and 20ml of isopropanol was poured into the carrier loaded with Pd and Ag, and the excess solution was poured out after uniform dispersion. Use the product under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120° C. for 6 hours to obtain catalyst B with a Pd content of 0.3% and an Ag content of 0.1%. ...

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Abstract

The invention discloses a C4 selective hydrogenation catalyst and a preparation method and use thereof. The saturated hydrocarbon hydrogenation catalyst is prepared by ionizing radiation reduction of a primary metal active component precursor and a secondary metal active component precursor, which are supported by a carrier, wherein the primary metal active component is Pd monomer; and the average diameters of particles of the primary metal active component and the particles of the secondary metal active component are both smaller than 10 nanometers. The catalyst disclosed by the invention has the advantages of avoiding being reduced by hydrogen in advance, along with high activity and selectivity, 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, in particular to a selective hydrogenation catalyst for carbon-four mixtures. Background technique [0002] The mixed carbon four fraction is a mixture of various alkanes, olefins, dienes, and alkynes containing 4 carbon atoms, mainly derived from the refinery gas produced in the petroleum refining process and the by-product of the cracking of petroleum hydrocarbons to produce ethylene. [0003] Cracking C4 contains n-butane, isobutane, 1-butene, trans-2-butene, cis-2-butene, isobutene, 1,2-butadiene, 1,3-butadiene, Methylacetylene, ethylacetylene, vinylacetylene and other saturated and unsaturated hydrocarbons are mainly used in industrial production to produce 1,3-butadiene, isobutene and butene. In the method of producing butene by cracking carbon four, one is to directly carry out selective hydrogenation of cracked carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J23/66B01J37/34C07C11/08C07C7/163
Inventor 乐毅戴伟徐立英彭晖穆玮于海波毛祖旺石瑞红高树升刘海江
Owner CHINA PETROLEUM & CHEM CORP
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