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Selective hydrogenation catalyst of alkine and diolefin, preparation method and application

A hydrogenation catalyst and selective hydrogenation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrocarbons, etc., can solve the problem of blocking pores, reducing reaction activity and selectivity, etc. problems, achieve the effect of reducing dosage, improving hydrogenation efficiency and reducing production cost

Active Publication Date: 2007-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because even if acetylene molecules can enter the depth of the channel, it is easy to cause reactions such as secondary hydrogenation and oligomerization of acetylene, block the channel, and reduce the reactivity and selectivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Will contain 5g Al 2 o 3 20% Al 2 o 3 Colloidal solution with HNO 3 Adjust the pH to 3.5, weigh 100g of the SiC annular carrier and dip it into the prepared colloidal solution, dry at 120°C for 24h, then calcinate at 300°C for 8h and cool to room temperature for use. PdCl containing 0.02g Pd 2 solution, AgNO containing 0.1 g Ag 3 solution, containing 0.1g Bi in Bi(NO 3 ) 2 solution, Ca(NO 3 ) 2 Step-by-step impregnation of the carrier to be used, each element should be dried at 150°C for 24 hours, and finally calcined at 600°C for 8 hours to obtain catalyst A, in which the content of Pd is 0.03%, the content of Ag is 0.1%, and the content of Bi is 0.1 %, the Ca content is 0.01%.

Embodiment 2

[0029] Containing 10g Al 2 o 3 5% Al 2 o 3 In the colloidal solution, add HNO 3Adjust the pH to 2.5, weigh 100 g of the SiC annular carrier to impregnate, dry at 200° C. for 8 hours, calcinate at 300° C. for 15 hours, and then cool to room temperature for use. The carrier to be used was first impregnated in a nitrate solution containing 0.01g Ag, 0.05g Bi, 0.02g La, dried at 200°C for 8h, and then the carrier was impregnated in a solution containing 0.05g Pd, 0.005g Ca, 0.005g Sr And in the chloride salt solution of 0.02g K, drying at 200°C for 8h, calcining at 300°C for 15h to obtain catalyst B, wherein the content of Pd is 0.05%, the content of Ag is 0.01%, the content of Bi is 0.05%, and the content of Ca is 0.005%, The K content is 0.02%, the Sr content is 0.005%, and the La content is 0.02%.

Embodiment 3

[0031] Containing 6g Al 2 o 3 30% Al 2 o 3 Colloidal solution, with HNO 3 Adjust the pH to 4.2, weigh 100g of talcum powder ring carrier and dip it into the prepared solution, dry at 100°C for 13.5h, then calcinate at 780°C for 20h, then cool to room temperature for use. Pd(NO 3 ) 2 , AgNO with 0.5 g Ag 3 , Bi(NO 3 ) 2 , Cu(NO 3 ) 2 , NaNO with 0.05g Na 3 Prepare a mixed solution, impregnate the carrier to be used in the mixed solution, dry at 135° C. for 30 hours, and then calcinate at 550° C. for 20 hours to obtain catalyst C. Wherein the Pd content is 0.01%, the Ag content is 0.5%, the Bi content is 0.5%, the Cu content is 0.05%, and the Na content is 0.05%.

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PUM

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Abstract

A selective hydrocatalyst for the alkine and diolefin in C2-10 fraction is composed of a inertial carrier chosen from silicon carbide, talc powder and fire-proof earth and a coated alumina layer containing Pd, Ag, Bi and at least one of Cu, Zn, alkali metal, AE metal and RE element. Its preparing process is also disclosed.

Description

technical field [0001] The invention relates to a catalyst for selective hydrogenation of alkynes and dienes in C2-C10 fractions and a preparation method thereof. It particularly relates to a palladium selective hydrogenation catalyst coated with an alumina coating with active components on the surface of an inert carrier and a preparation method thereof. technical background [0002] In the field of petrochemical industry, the ethylene fraction in the cracking and separation section contains 0.3-3% acetylene. This acetylene impurity is a poison to the polyethylene catalyst and affects the normal progress of the ethylene polymerization reaction. In order to avoid the above-mentioned ethylene polymerization catalyst poisoning phenomenon, the method of catalyst selective hydrogenation is usually used to convert acetylene in the ethylene fraction into ethylene. However, in the reaction of selective hydrogenation to remove acetylene, the acetylene adsorbed on the surface of the...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/50B01J23/54B01J23/66B01J23/89C07C7/167C07C11/04
CPCY02P20/52
Inventor 戴伟卫国宾彭晖穆玮房艳刘海江戚文新卢红亮何耕云郭彦来朱警
Owner CHINA PETROLEUM & CHEM CORP
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