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Platinum-cobalt dual-metal catalyst with room-temperature benzene hydrogenation activity and preparation method thereof

A bimetallic catalyst and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, hydrogenation hydrocarbon production, chemical instruments and methods, etc., can solve the problems of no patents and literature reports, etc., and achieve high room temperature heating Effects of hydrogen efficiency, energy saving, and process simplification

Inactive Publication Date: 2009-09-02
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are no patents or literature reports on catalysts with high-efficiency benzene hydrogenation activity at room temperature

Method used

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  • Platinum-cobalt dual-metal catalyst with room-temperature benzene hydrogenation activity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, preparation and activity evaluation of catalyst

[0029] 1. Preparation of catalyst

[0030] 1. Preparation of catalyst precursor

[0031] 0.07g Pt(NH 3 ) 4 (NO 3 ) 2 and 1.5g Co(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL of deionized water, 2.9 g of activated carbon was added, stirred magnetically for 2 h, evaporated to dryness in a water bath at 95 °C, and then dried in an oven at 110 °C for 12 h.

[0032] 2. Preparation of catalyst

[0033] Put 120 mg of the catalyst precursor prepared in step 1 into a U-shaped quartz tube, activate in hydrogen-nitrogen mixed gas at 350° C. for 1 h, and flow both hydrogen and nitrogen at 20 mL / min.

[0034] 2. Catalyst performance evaluation

[0035] 1. Determination of metal specific surface area and CO chemical adsorption capacity of catalyst

[0036] The metal specific surface area and CO chemisorption capacity of the catalyst prepared in step 1 were measured, and the results are shown in Table 1.

[0037] ...

Embodiment 2

[0040] Embodiment 2, catalyst preparation and activity evaluation

[0041] 1. Preparation of catalyst

[0042] 1. Catalyst precursor preparation

[0043]0.07g Pt(NH 3 ) 4 (NO 3 ) 2 and 1.5g Co(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL of deionized water, 2.9 g of activated carbon was added, stirred magnetically for 2 h, evaporated to dryness in a water bath at 95 °C, and then dried in an oven at 110 °C for 12 h.

[0044] 2. Catalyst activation

[0045] Put 100 mg of the catalyst precursor prepared in step 1 into a U-shaped quartz tube, activate in a hydrogen-nitrogen mixed gas at 500°C for 1 h, and flow both hydrogen and nitrogen at 20 mL / min.

[0046] 2. Catalyst performance evaluation

[0047] 1. Determination of metal specific surface area and CO chemical adsorption capacity of catalyst

[0048] The metal specific surface area and CO chemisorption capacity of the catalyst prepared in step 1 were measured, and the results are shown in Table 1.

[0049] 2. Benzene ...

Embodiment 3

[0052] Embodiment 3, catalyst preparation and activity evaluation

[0053] 1. Preparation of catalyst

[0054] 1. Preparation of catalyst precursor

[0055] 0.07g Pt(NH 3 ) 4 (NO 3 ) 2 and 1.5g Co(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL of deionized water, 2.9 g of activated carbon was added, stirred magnetically for 2 h, evaporated to dryness in a water bath at 95 °C, and then dried in an oven at 110 °C for 12 h.

[0056] 2. Catalyst activation

[0057] 120 mg of the catalyst precursor prepared in Step 1 was put into a U-shaped quartz tube, activated in nitrogen at 500°C for 1 h, and the nitrogen flow rate was 50 mL / min.

[0058] 2. Catalyst performance evaluation

[0059] After step 1 is completed, a reaction gas is introduced into the U-shaped quartz tube, the reaction gas is a hydrogen-nitrogen mixture, and the flow rates are 10 mL / min and 40 mL / min, respectively. Benzene was injected with a micropump at a flow rate of 0.5mL / h, and was brought into the catalyst...

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Abstract

The invention discloses a platinum-cobalt dual-metal catalyst with room-temperature benzene hydrogenation activity and a preparation method thereof. The preparation method of the platinum-cobalt dual-metal catalyst comprises the following steps: an activated carbon carrier is added to a solution A for water bath and is evaporated and baked to obtain a catalyst precursor; and the solution A is a water solution containing cobalt salt and platinum salt. The invention simplifies the baking step in the prior catalyst preparation method, simplifies technological flows and saves energy sources, and the obtained catalyst has higher metal specific area and can catalyze an aromatic hydrogenation reaction under a room temperature condition. The invention has important economic values.

Description

technical field [0001] The invention relates to a platinum-cobalt bimetallic catalyst with room temperature benzene hydrogenation activity and a preparation method 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 benzene hydrogenation reaction have been reported in many literatures and patents. At present, non-precious metal Ni-based catalysts and noble metal Pt-based catalysts are used in industrial production. The catalytic reaction temperature is mostly 200-400°C and the pressure is 2...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C5/10C07C13/18
Inventor 朱月香鲁树亮郑仁垟谢有畅
Owner PEKING UNIV
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