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Load-type copper oxide-based catalyst containing auxiliary agent and preparation method thereof

A catalyst, copper oxide technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of low yield, etc. Stable and easy to recycle effect

Active Publication Date: 2017-10-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves upon existing catalysts that have been developed for use with other chemical reactions due to its ability to improve dispersing active ingredients effectively without losing their effectiveness over time. By modifying certain elements within this new material called copper (Cu)oxalate complex), they can be easily separated from each others while still maintaining effective performance. These improvements make them more efficient than previous materials when applied directly into different types of reactors such as fixed bed tubular columns or fluidized beds.

Problems solved by technology

Technologies described in this patented text involve producing stable compounds called sulfones from unsaturated starting molecules like benzene. These new types of compound offer various benefits over existing ones including improved safety properties and potential applications in industry. Sulfur dioxide was developed earlier than previously known processes but still suffers from drawbacks associated therewith. To overcome those issues, we propose developing effective techniques for efficiently converting certain substances into desired forms while also reducing harmful emissions caused by excessive use of solvents.

Method used

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  • Load-type copper oxide-based catalyst containing auxiliary agent and preparation method thereof
  • Load-type copper oxide-based catalyst containing auxiliary agent and preparation method thereof
  • Load-type copper oxide-based catalyst containing auxiliary agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A. Weigh 15mmolCo(NO 3 ) 2 ·6H 2 O and 5mmolAl(NO 3 ) 3 9H 2 O was dissolved in 100ml deionized water to prepare solution A, and weighed 10mmolNa 2 CO 3 Dissolve 30mmol NaOH in 100ml deionized water to prepare solution B, add solution A and solution B dropwise to the four-neck flask at room temperature, keep the pH at 10, keep the suspension in a water bath at 80°C for 18h after the addition, and naturally Cool to room temperature; the resulting precipitate was washed with deionized water and centrifuged until neutral, and the filter cake was dried overnight in an oven at 60°C to obtain Co 3 al 1 -LDH.

[0020] B. Take 0.3gCo 3 al 1-LDH carrier was placed in 40ml deionized water and stirred to form a uniform suspension, and the pH was adjusted to 10 with a NaOH solution with a concentration of 1mol / L, and 0.0273g Cu(NO 3 ) 2 +3H 2 O with 0.0147g Ce(NO 3 ) 3 +6H 2 O was added to the suspension, stirred in a water bath at 85°C for 6 hours, the obtained pre...

Embodiment 2

[0022] A. Weigh 10mmolCo(NO 3 ) 2 ·6H 2 O and 5mmolAl(NO 3 ) 3 9H 2 O was dissolved in 100ml deionized water to prepare solution A, and weighed 5mmolNa 2 CO 3 and 20mmol NaOH were dissolved in 100ml deionized water to prepare solution B, and solution A and solution B were added dropwise to the four-neck flask at room temperature, keeping the pH at 11, and the suspension after the addition was kept in a water bath at 80°C for 24h, and naturally Cool to room temperature; the resulting precipitate was washed with deionized water and centrifuged until neutral, and the filter cake was dried overnight in an oven at 60°C to obtain Co 2 al 1 -LDH.

[0023] B. Take 0.3gCo 2 al 1 -LDH carrier was placed in 40ml deionized water and stirred to form a uniform suspension, and the pH was adjusted to 11 with a NaOH solution with a concentration of 1mol / L, and 0.0273g Cu(NO 3 ) 2 +3H 2 O with 0.0066g Ni(NO 3 ) 2 +6H 2 O was added to the suspension, stirred in a water bath at 85...

Embodiment 3

[0025] A. Weigh 15mmolCo(NO 3 ) 2 ·6H 2 O and 5mmolAl(NO 3 ) 3 9H 2 O was dissolved in 100ml deionized water to prepare solution A, and weighed 10mmolNa 2 CO 3 and 30mmol NaOH were dissolved in 100ml deionized water to prepare solution B, and solution A and solution B were added dropwise to the four-necked flask at room temperature, keeping the pH at 9, and the suspension after the addition was kept in a water bath at 80°C for 18h, and naturally Cool to room temperature; the resulting precipitate was washed with deionized water and centrifuged until neutral, and the filter cake was dried overnight in an oven at 60°C to obtain Co 3 al 1 -LDH.

[0026] B. Take 0.3gCo 3 al 1 -LDH carrier was placed in 40ml deionized water and stirred to form a uniform suspension, adding urea with a concentration of 1mol / L to adjust the pH to 11, and 0.0273g Cu(NO 3 ) 2 +3H 2 O with 0.0049g Ce(NO 3 ) 3 +6H 2 O was added to the suspension, stirred in a water bath at 85°C for 8 hours...

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Abstract

The invention discloses a load-type copper oxide-based catalyst containing an auxiliary agent and a preparation method thereof, which belong to the technical field of catalyst preparation. The method takes Co-Al hydrotalcite or spinel as a carrier, is loaded with CuO and the auxiliary agent oxide XOn, which is expressed as CuO-XOn/S, wherein, the mass percentage of CuO accounts for 1-5% of that of the catalyst, and the mol ratio of the auxiliary agents X to CuO is 0.1-0.3. The catalyst has good active component dispersity and the simple specific surface and the structure. The preparation method has the advantages of simple process and convenient recovery. The catalyst used for styrene epoxidation to generate a styrene oxide reaction, acetonitrile is taken as a solvent, under condition of tert-butyl hydroperoxide (TBHP) taken as an oxidizing agent, high selectivity conversion from styrene to styrene oxide through an epoxidation mode is realized, and the catalytic activity is obviously higher than that of the CuO-based catalyst reported by a literature. The condition of the reaction technology is mild, and the process is safe and environmentally friendly.

Description

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Claims

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Application Information

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Owner BEIJING UNIV OF CHEM TECH
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