Catalyst for dialkene hydrogenation and preparation method of catalyst

A technology of diolefins and catalysts, which is applied in the field of hydrogenation catalysts, can solve the problems of catalysts such as poor impurity resistance, short operation period, and easy deactivation, and achieve the effects of reducing olefin polymerization, improving stability, and large specific surface area

Inactive Publication Date: 2017-06-23
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, when the researched and developed catalyst is used for the hydrogenation of low-carbon hydrocarbons with a mono-olefin content of less than 15%, the activity and stability of the catalyst are better, and the industrial application cycle is longer. , when the total olefin content is greater than 8%, the catalyst has poor resistance to impurities, is easily deactivated, and has a short operating cycle

Method used

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  • Catalyst for dialkene hydrogenation and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 1.2kg of zinc nitrate in 6L of water to make a solution containing zinc, and dissolve 0.24kg of sodium metaaluminate and 0.30kg of sodium carbonate in 4L of water to make a solution containing aluminum. Divide the zinc-containing solution into 3 equal parts, each 2L. Take 2L of zinc-containing solution, keep the temperature at 80°C, add aluminum-containing mixed solution dropwise to it until the pH value reaches 9.0; stop dropping the aluminum-containing mixed solution, then add 2L of zinc-containing solution dropwise to the mixing system, and continue to drop aluminum-containing solution Mix the solution until the pH value reaches 9.0; titrate the aluminum-containing mixed solution and the zinc-containing solution alternately until all the zinc-containing solutions are added, and add the aluminum-containing mixed solution dropwise until the pH reaches 9.0. The total titration time is 3 hours. The obtained mixture was aged at 80°C for 4h, cooled and washed unti...

Embodiment 2

[0041] The preparation method and steps of the composite carrier containing zinc oxide-alumina are the same as in Example 1, and the zinc oxide containing zinc-aluminum spinel is prepared, and the pH value is adjusted to 8.7. In terms of oxides, the content of zinc oxide is 70%; the specific surface area is 191m 2 / g.

[0042] The composite carrier includes 30wt% of zinc oxide containing zinc-aluminum spinel, 68wt% of alumina, and the contents of phosphorus, potassium and magnesium in the auxiliary components are P 2 o 5 0.6wt%, K 2 O 0.6wt%, MgO 0.6wt%.

[0043] The difference is that after the composite carrier is obtained, the composite carrier containing zinc oxide-alumina is modified by using potassium and magnesium. , magnesium nitrate, completely dissolved in 30ml of distilled water, and then diluted with deionized water, made into a solution and sprayed with a composite carrier of zinc oxide-alumina, so that the content of potassium and magnesium on the outside of...

Embodiment 3

[0046] The preparation method and steps of the composite carrier containing zinc oxide-alumina are the same as in Example 1. Zinc oxide containing zinc aluminum spinel was prepared, and the pH value was adjusted to 9.3. Zinc oxide containing zinc aluminum spinel, calculated as oxide, the content of zinc oxide is 63%; the specific surface area is 214m 2 / g.

[0047] The composite carrier includes 18.3wt% of zinc oxide containing zinc-aluminum spinel, 79wt% of alumina, and the contents of phosphorus, potassium and magnesium in the auxiliary components are P 2 o 5 0.9wt%, K 2 O 0.8wt%, MgO 1.0wt%. Composite carrier specific surface area 242m 2 / g.

[0048] Take palladium chloride, chloroauric acid and lanthanum nitrate and add them to 30ml of distilled water, add ammonia water to adjust the pH value to 3.0, then dilute with deionized water, make an impregnation solution to impregnate 100g of spherical zinc oxide-alumina composite carriers, The obtained catalyst precursor ...

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Abstract

The invention discloses a catalyst for dialkene hydrogenation and a preparation method of the catalyst. The catalyst comprises the following ingredients in percentage by oxide mass: 91.0wt% to 97.5wt% of zinc oxide-aluminum oxide containing composite support, 1.5wt% to 5.5wt% of active ingredient, i.e., palladium oxide, 0.5wt% to 1.5wt% of auxiliary active ingredient, i.e., auric oxide and 0.5wt% to 2.0wt% of lanthanum oxide. According to the catalyst, the dialkene hydrogenation activity is high, the rate of loss of noble metal active ingredients is low, and the running cycle is long.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation catalysts, in particular to a diene hydrogenation catalyst and a preparation method, more specifically a C4-C8 diene hydrogenation catalyst supported by a zinc oxide-alumina composite material and its preparation method. Background technique [0002] With the development of oil refining industry at home and abroad, secondary processing units account for an increasing proportion in the crude oil processing process, especially with the continuous development of ethylene cracking and catalytic cracking technology and the continuous deterioration of raw material quality, refineries and ethylene plants C4 The -C8 resource becomes more abundant, and the deep processing of low-carbon hydrocarbons is gradually paid attention to. Many refining and chemical integration enterprises in my country generally have the problem of excess C4-C8 fractions and low utilization rate. At present, except for a sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J35/10B01J23/66
CPCB01J27/1856B01J23/002B01J23/66B01J35/1019B01J2523/00B01J2523/19B01J2523/27B01J2523/31B01J2523/3706B01J2523/824
Inventor 罗祥生方丽萍龚立宾
Owner QINZHOU UNIV
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