Low-temperature catalytic benzene hydrogenation method and special catalyst thereof

A catalyst, a technology for catalyzing benzene, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems that do not involve cobalt catalysts, etc.

Inactive Publication Date: 2011-10-05
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patents all involve cobalt catalysts, but none of them involve the application of cobalt catalysts in benzene hydrogenation reaction

Method used

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  • Low-temperature catalytic benzene hydrogenation method and special catalyst thereof
  • Low-temperature catalytic benzene hydrogenation method and special catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. Preparation of alumina-supported platinum-cobalt bimetallic catalyst and its catalytic performance for benzene hydrogenation

[0026] 1. Preparation of alumina-supported platinum-cobalt bimetallic catalyst

[0027] 0.12g Pt(NH 3 ) 4 (NO 3 ) 2 and 7.4g Co(NO 3 ) 2 ·6H 2 O was dissolved in 200 mL of deionized water, and 3.5 g of Al was added 2 o 3 The carrier, after magnetically stirring for 2 hours, was evaporated to dryness in a water bath at 95°C, then baked in an oven at 110°C for 12 hours, ground and calcined in a muffle furnace at 500°C for 4 hours to obtain a platinum-cobalt bimetallic catalyst supported on alumina.

[0028] 2. Benzene hydrogenation activity test and results

[0029] 1. Activation of the catalyst

[0030] Put 100 mg of alumina-supported platinum-cobalt bimetallic catalyst into a U-shaped quartz tube, and perform a reduction reaction with hydrogen-nitrogen mixed gas at 450 °C for 1 h, and the flow rates of hydrogen and nitrogen ...

Embodiment 2

[0034] Example 2. Preparation of silica-supported platinum-cobalt bimetallic catalyst and its catalytic performance for benzene hydrogenation

[0035] 1. Preparation of silica-supported platinum-cobalt bimetallic catalyst

[0036] 0.12g Pt(NH 3 ) 4 (NO 3 ) 2 and 7.4g Co(NO 3 ) 2 ·6H 2 O was dissolved in 200 mL of deionized water, and 3.5 g of SiO 2 The carrier, after being magnetically stirred for 2 hours, was evaporated to dryness in a water bath at 95°C, then baked in an oven at 110°C for 12 hours, ground and calcined in a muffle furnace at 500°C for 4 hours to obtain a silica-supported platinum-cobalt bimetallic catalyst.

[0037] 2. Benzene hydrogenation activity test and results

[0038] 1. Activation of the catalyst

[0039] Put 100 mg of silica-supported platinum-cobalt bimetallic catalyst into a U-shaped quartz tube, and perform reduction reaction with hydrogen-nitrogen mixed gas at 450° C. for 1 h, and the flow rates of hydrogen and nitrogen are both 20 mL / min....

Embodiment 3

[0045] Example 3. Preparation of alumina-supported cobalt metal catalyst and its catalytic performance for benzene hydrogenation

[0046] 1. Preparation of alumina-supported cobalt metal catalyst

[0047] 7.4g Co(NO 3 ) 2 ·6H 2 O was dissolved in 200 mL of deionized water, and 3.5 g of Al was added 2 o 3 The carrier, after magnetically stirring for 2 hours, was evaporated to dryness in a water bath at 95°C, then baked in an oven at 110°C for 12 hours, ground and calcined at 500°C for 4 hours in a muffle furnace to obtain an alumina-supported cobalt metal catalyst.

[0048] 2. Benzene hydrogenation activity test and results

[0049] Same as Step 2 of Example 1.

[0050] The results of the benzene hydrogenation reaction are shown in Table 1.

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Abstract

The invention discloses a catalyzing method of benzene hydrogenation at low temperature and a special catalyst thereof. The catalyzing method of the benzene hydrogenation at the low temperature provided by the invention uses a co-based catalyst to catalyze the benzene hydrogenation to react; wherein, the co-based catalyst is a cobalt single metal catalyst / or a noble metal-cobalt bimetal catalyst. Compared with a Ni-based catalyst or a Pt-based catalyst which is used for catalyzing the benzene hydrogenation to react at present, the invention can realize the benzene hydrogenation reaction at low temperature or even under condition of room temperature by using the co-based catalyst to catalyze the benzene hydrogenation to react and is provided with high hydrogenation activity. The invention provides a novel co-based catalyst, namely the noble metal-cobalt bimetal catalyst which is used in the benzene hydrogenation reaction. The noble metal-cobalt bimetal catalyst is provided with higher hydrogenation activity than the cobalt single metal catalyst. Besides being used in the preparation of cyclohexane, the co-based catalyst can be used in the intensive removal of aromatics, in particular the benzene in the fuel oil and the elimination of trace benzene in the environment.

Description

technical field [0001] The invention relates to a low-temperature catalytic benzene hydrogenation method and a special catalyst thereof. Background technique [0002] Cyclohexane is an important organic chemical intermediate, widely used in the production of nylon-6 and nylon-66. The main way to produce cyclohexane is the hydrogenation reaction of benzene, so the catalyst for the hydrogenation reaction of benzene is in great demand. In addition, the elimination of trace amounts of benzene in the environment and the deep removal of aromatics in fuel oil, especially benzene, also require higher activity catalysts for the hydrogenation of aromatics. The catalysts for the hydrogenation reaction of benzene have been reported in many documents and patents. Currently, Ni-based catalysts of non-noble metals and Pt-based catalysts of noble metals are used in industrial production. The benzene hydrogenation reaction temperature of the Ni-based catalyst is 130-200°C, and the benzene ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C13/18C07C5/10B01J23/75B01J23/89
Inventor 朱月香鲁树亮谢有畅
Owner PEKING UNIV
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