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Pd-Ni/Al2O3 catalyst, its preparation method and application thereof

A technology of catalysts and catalyst carriers, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that the conversion rate of cyclopentadiene is only 86% , to achieve good reusability, mild reaction conditions, and improved selectivity

Active Publication Date: 2012-10-17
HEFEI UNIV OF TECH
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  • Abstract
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Problems solved by technology

Although the selectivity of cyclopentene in this scheme can reach 96%, the conversion rate of cyclopentadiene is only 86%.

Method used

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  • Pd-Ni/Al2O3 catalyst, its preparation method and application thereof
  • Pd-Ni/Al2O3 catalyst, its preparation method and application thereof
  • Pd-Ni/Al2O3 catalyst, its preparation method and application thereof

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Embodiment Construction

[0024] Non-limiting embodiments of the present invention are described as follows:

[0025] 1. Preparation of catalyst

[0026] PdCl 2 and Ni(NO 3 ) 2 Add to the acetic acid solution with a mass concentration of 30%, the mass ratio of Pd and Ni is 1:0.5-3, stir to dissolve and then add Al 2 o 3 H2O, stir evenly and let stand for 2h, then dry at 100-120°C for 8-10h, and then roast at 540-560°C for 2.5-3.5h, after roasting, pass in hydrogen to activate the catalyst, so that Ni oxide can be reduced to Active Ni, the activation temperature is 250°C, the pressure is 0.1MPa, the hydrogen flow rate is 45ml / min, and the activation time is 48 hours, that is, Pd-Ni / Al can be produced 2 o 3 Catalyst, where PdCl 2 and Ni(NO 3 ) 2 The total mass of Al 2 o 3 ·H 2 0.5-1% of O mass;

[0027] 2. Liquid phase catalytic hydrogenation

[0028] The Pd-Ni / Al prepared in step 1 2 o 3 Catalyst and 50g of cyclopentadiene (derived from dicyclopentadiene cracking, dicyclopentadiene conte...

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Abstract

The invention discloses a Pd-Ni / Al2O3 catalyst, its preparation method and an application thereof. With PdCl2 and Ni(NO3)2 being used as active components and Al2O3.H2O being used as a catalyst carrier, the Pd-Ni / Al2O3 catalyst is prepared by loading the active components onto the catalyst carrier, wherein the gross mass of PdCl2 and Ni(NO3)2 is 0.5-1 wt% of the weight of Al2O3.H2O and the mass ratio of Pd to Ni in the active components is 1:0.5-3. The Pd-Ni / Al2O3 catalyst can be used as a selective catalyst in cyclopentadiene selective hydrogenation for synthesis of cyclopentene. By the adoption of the catalyst, hydrogenation reaction can be conducted at normal temperature; the reaction condition is mild; conversion rate and selectivity are very good; the conversion rate is 98-99.5%; and the selectivity of cyclopentene also reaches 97-98.5%.

Description

1. Technical field [0001] The present invention relates to a kind of Pd-Ni / Al 2 o 3 The catalyst and its preparation method and application are used as a catalyst in the catalytic hydrogenation of cyclopentadiene to prepare cyclopentene. 2. Background technology [0002] In recent years, with the rapid development of the ethylene industry, the output of C5 fractions has increased sharply, and dicyclopentadiene accounts for 21% of C5 fractions, making dicyclopentadiene as a raw material for the synthesis of cyclopentene very valuable for research. The dicyclopentadiene fraction is depolymerized to generate cyclopentadiene, and then selectively hydrogenated to obtain cyclopentene. In the downstream products of dicyclopentadiene, cyclopentene occupies a very important position. Due to the specific structure of cyclopentene, it is an important organic chemical raw material, which can be used to prepare cyclopentanol, cyclopentanone, glutaraldehyde , cyclopentylmethyl ether, b...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C13/12C07C5/05
Inventor 冯乙巳程月郑波周雪梅许皓诚王维丞
Owner HEFEI UNIV OF TECH
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