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Synthetic method for 2-butene through isomerization of 1-butene by catalyzing at room temperature

A technology of isomerization and butene, applied in the fields of isomerization to hydrocarbon production, organic chemistry, etc., can solve the problems of easy accompanying side reactions, difficult large-scale application, and high cost, achieve wide range of raw materials, reduce reaction energy consumption, simplify The effect of production equipment

Inactive Publication Date: 2016-04-06
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among the catalyst systems for this reaction, there are mainly alkaline earth oxides, silica-alumina molecular sieves and ionic liquids, etc., but there are still major problems in these systems: oxide and molecular sieve catalysts need to be used at higher temperatures (200°C-450°C) Only when the activity is guaranteed, the energy consumption is high and side reactions are easy to be accompanied, and the reactant cannot be mixed with oxidizing gas; the ionic liquid catalyst mainly stays in basic research, its cost is high, and it is difficult to apply on a large scale

Method used

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  • Synthetic method for 2-butene through isomerization of 1-butene by catalyzing at room temperature
  • Synthetic method for 2-butene through isomerization of 1-butene by catalyzing at room temperature
  • Synthetic method for 2-butene through isomerization of 1-butene by catalyzing at room temperature

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Experimental program
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Effect test

Embodiment 1

[0018] Preparation of 1% Palladium-supported SiO by Impregnation Method 2 Catalyst, calculated by loading and removing PdCl 2 solution and diluted to impregnation volume, adding SiO 2 Post-stirring, sonication to make it evenly mixed, aging overnight and drying at 100°C. After washing and drying at 300 °C with H 2 Reduction in the atmosphere for 3h, palladium-loaded SiO can be prepared 2 catalyst. Marked as Pd / SiO 2 (IMP). Then the structural characterization and catalytic performance evaluation were carried out.

Embodiment 2

[0020] Preparation of palladium-supported SiO with a total loading of 1% by colloidal immobilization method 2 Catalyst, calculated by loading and removing PdCl 2 solution and diluted to impregnation, NaBH was added dropwise with vigorous stirring 4 , followed by addition of SiO 2 Stir continuously for 3 hours, and then dry overnight at 100°C after suction filtration and washing to prepare palladium-supported SiO 2 catalyst. Marked as Pd / SiO 2 (SIT). Then the structural characterization and catalytic performance evaluation were carried out.

Embodiment 3

[0022] A Pd-loaded KIT-6 catalyst with a loading capacity of 1% was prepared according to the method of Example 1, except that the carrier selected was KIT-6 molecular sieve, and the obtained catalyst was marked as Pd / KIT-6 (IMP). Then the structural characterization and catalytic performance evaluation were carried out.

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Abstract

The invention discloses a synthetic method for 2-butene through isomerization of 1-butene by catalyzing at room temperature. The method is characterized in that 2-butene is prepared through isomerization of 1-butene by catalyzing with a supported noble metal catalyst at room temperature under an oxygen-free or oxygen condition. The method has the following advantages: reduction of reaction energy consumption, simplification of production equipment and avoidance of combustion tail gas emission are realized; oxidizing gas only has activation effect on reaction gas at room temperature and may not be peroxidized into carbon dioxide and the like, so reaction activity can be further improved, and the requirement on the purity of a raw material is reduced; and the used catalyst is the supported noble metal catalyst which is wide in raw materials and simple to prepare, wherein an active component is at least one selected from the group consisting of palladium, gold, platinum, silver and rhodium, and the carrier is any one or a mixed combination of more selected from the group consisting of silicon oxide, a KIT-6 molecular sieve, an H beta molecular sieve, a ZSM-5 molecular sieve, a USY molecular sieve, etc. The synthetic method provided by the invention meets the requirement for a green production process and has popularization values.

Description

technical field [0001] The invention relates to a method for synthesizing 2-butene by catalyzing the isomerization of 1-butene at room temperature. The method uses a supported noble metal catalyst, which has high catalytic activity at room temperature, and the reaction does not require light. No by-products are generated under anaerobic or aerobic conditions. It mainly solves the problems of high temperature, high energy consumption, and low yield in previous technologies, and belongs to the technical field of green production technology in the petrochemical industry. Background technique [0002] Propylene is one of the basic raw materials of petrochemical industry. It is the monomer for the synthesis of polypropylene. It is also widely used to produce acrylonitrile, propylene oxide, acetone and other important organic chemical raw materials. Propylene is mainly produced as a by-product of naphtha and petroleum gas cracking reactions. However, in recent years, the demand f...

Claims

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Application Information

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IPC IPC(8): C07C5/25C07C11/08
Inventor 郝郑平李杨麻春艳张中申
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI