Catalyst for isobutene oligomerization and preparation method thereof

A technology of isobutene and catalyst, which is applied in the field of isobutene oligomerization catalyst and preparation, can solve the problems of high activity and product selectivity, non-regeneration, easy deactivation, etc., and achieve high activity and selectivity, uniform dispersion, and large specific surface area Effect

Inactive Publication Date: 2017-06-20
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The main problems found in the above-mentioned catalysts during the butene oligomerization process are: solid acid catalyst SPAC is currently a widely used catalyst in the butene oligomerization reaction, but it has muddy, agglomerated, and cannot be regenerated after deactivation; heterogeneous Catalysts have high oligomerization activity and product selectivity, but are easy to deactivate; supported catalysts and ionic liquid catalysts have attracted widespread attention in recent years due to their good reactivity

Method used

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  • Catalyst for isobutene oligomerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 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

[0042] 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.

[0043] 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 0.7wt%, MgO 0.4wt%.

[0044] 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 to prepare a solution and spray the composite carrier of zinc oxide-alumina, so that the content of potassium and magnesium outside the carrier is...

Embodiment 3

[0047] 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.

[0048] 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.

[0049] Ferric sulfate hexahydrate and nickel sulfate hexahydrate were prepared as an impregnating solution, and 100 g of a composite carrier containing zinc oxide-alumina was impregnated. The specific steps were the same as in Example 1. The catalyst was dried at 130°C for 7h and then calcined at 550°C for 7.0h to obtain isobu...

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Abstract

The invention relates to a catalyst for isobutene oligomerization and a preparation method thereof. The catalyst is composed of the following components in terms of oxide mass: 80.0-97.0wt% of a composite carrier containing zinc oxide-alumina, 4.0-15.0wt% of active component iron sulfate, and 1.0-6.0wt% of nickel sulfate. The catalyst has high oligomerization activity, the dimer selectivity is high, the trimer selectivity is low, and the catalyst operation cycle is long.

Description

technical field [0001] The invention belongs to the technical field of olefin oligomerization catalysts, and in particular relates to an isobutene oligomerization catalyst and a preparation method thereof, more specifically to an isobutene oligomerization catalyst and a preparation method using a zinc oxide-alumina composite material as a carrier. Background technique [0002] Oligomerization of low-carbon olefins is one of the important chemical processes in oil refining and organic chemical industry. The oligomerization product of butene is an important chemical intermediate, which can be used to produce oligomerized gasoline and diesel oil, as well as detergent, Important intermediates for plasticizers, additives and pesticides. therefore, [0003] Butene oligomerization catalysts mainly include heterogeneous catalysts such as Ziggler type homogeneous catalysts, solid phosphoric acid catalysts, zeolite molecular sieve catalysts and supported catalysts. European patent E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J35/10
CPCB01J27/1853B01J35/1019
Inventor 石海信罗祥生韦金广
Owner QINZHOU UNIV
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