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A kind of olefin oligomerization catalyst and preparation method thereof

A technology of catalysts and olefins, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of high activity and product selectivity, non-regeneration, easy deactivation, etc., to achieve high activity and selectivity , Large loading capacity, good oligomerization activity

Inactive Publication Date: 2019-05-17
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of butene oligomerization, it is found that the main problems of the above-mentioned catalysts are: solid acid catalyst SPAC is currently a widely used catalyst in butene oligomerization, 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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  • A kind of olefin oligomerization catalyst and preparation method thereof
  • A kind of olefin oligomerization catalyst and preparation method thereof
  • A kind of olefin oligomerization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, 8.0 g of the water-soluble chitosan pore-enlarging agent was added to deionized water at 50° C., and then acetic acid was added dropwise until the chitosan was completely dissolved to obtain an acid solution containing the pore-enlarging agent. Weigh a certain amount of phosphoric acid and potassium nitrate respectively, completely dissolve the phosphoric acid and potassium nitrate in 70 g of distilled water to prepare an aqueous solution containing phosphorus and potassium. Weigh 350g of pseudo-boehmite powder and 20.0g of fennel powder into the kneader, and mix evenly, then add the mixed solution of phosphoric acid, lanthanum nitrate and potassium nitrate, and finally add the acid solution containing chitosan to the pseudo-boehmite The diaspore powder is evenly kneaded, and then kneaded-extruded into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 1 containing phosphorus, lanthanum and potassium. vec...

Embodiment 2

[0037] Add 8.0 g of the water-soluble chitosan pore-enlarging agent into deionized water at 50° C., and then add acetic acid dropwise until the chitosan is completely dissolved to obtain an acid solution containing the pore-enlarging agent. Weigh a certain amount of phosphoric acid and potassium nitrate respectively, completely dissolve phosphoric acid, lanthanum nitrate and potassium nitrate in 70 g of distilled water to prepare an aqueous solution containing phosphorus and potassium. Weigh 350g of pseudo-boehmite powder and 20.0g of fennel powder into the kneader, and mix evenly, then add the mixed solution of phosphoric acid, lanthanum nitrate and potassium nitrate, and finally add the acid solution containing chitosan to the pseudo-boehmite The boehmite powder is evenly kneaded, and then kneaded-extruded into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 2 containing phosphorus, lanthanum and potassium. carrie...

Embodiment 3

[0041] The preparation method of the carrier was carried out according to Example 1. The difference is that the water-soluble chitosan pore-enlarging agent is replaced by the non-water-soluble chitosan pore-enlarging agent, and the chitosan formic acid solution is stirred with a magnetic stirrer for 30 minutes to obtain the alumina carrier 3 with a macroporous structure. The content of the auxiliary components phosphorus, lanthanum and potassium in the carrier accounts for the percentage of the carrier mass, which is P 2 o 5 1.2wt%, La 2 o 3 1.5%, K 2 O 1.4 wt%. Its specific surface area and pore size distribution are shown in Table 1.

[0042] Ferric sulfate hexahydrate and nickel sulfate hexahydrate were prepared as an impregnating solution, and 100 g of alumina carrier with a macroporous structure 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 isobutylene oligome...

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Abstract

The invention discloses an olefin oligomerization catalyst and a preparation method. The composition of the catalyst includes the following components in terms of oxide mass: 81.0-96.0wt% alumina carrier with macroporous structure, and chitosan is used as the carrier to expand the pores. The active components are iron sulfate 2.5-11.5wt% and nickel sulfate 1.5-7.5wt%; the catalyst has high oligomerization activity, high dimer selectivity, low trimer selectivity, and long catalyst operation cycle.

Description

technical field [0001] The invention belongs to the technical field of olefin oligomerization catalysts, and in particular relates to an olefin oligomerization catalyst and a preparation method thereof, more specifically to an olefin oligomerization catalyst with a macroporous structure of alumina as a carrier and a preparation method thereof. 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, 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 EP0371983 uses ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/053B01J35/10C07C2/16C07C11/02
CPCC07C2/16B01J27/053B01J35/638B01J35/651B01J35/635B01J35/615C07C11/02
Inventor 晁会霞贾贞健罗祥生王爱荣邓兰娇
Owner QINZHOU UNIV
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