Preparation method of high-dispersion copper-based catalyst based on non-precious metal

A technology of copper-based catalysts and precious metals, applied in the preparation of organic compounds, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of high production cost of o-phenylphenol and achieve the goal of preparing The process is simple and easy, the structure is regular, and the effect of reducing production costs

Active Publication Date: 2013-10-02
YANGZHOU UNIV
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  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for preparing a highly dispersed copper-based catalyst for the preparation of o-phenylphenol, and to solve the problem that the production cost of o-phenylphenol is relatively high due to the use of noble metal catalysts

Method used

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  • Preparation method of high-dispersion copper-based catalyst based on non-precious metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] One, the preparation of metal oxide catalyst:

[0035] 1. Weigh 20.48g Cu(NO 3 ) 2 ·3H 2 O, 30.42g Mg(NO 3 ) 2 ·6H 2 O and 12.72g Al 2 (NO 3 ) 3 9H 2 O was dissolved in 500 mL of deionized water to prepare mixed salt solution A.

[0036]2. Take 20g NaOH and 53g NaOH 2 CO 3 Dissolve in 500mL deionized water to make mixed alkali solution B.

[0037] 3. Add a certain amount of deionized water to the flask and heat it to the reaction temperature of 60°C. Add solutions A and B to the four-necked flask at a rate of 2.5mL / min under stirring, and keep the mixed solution during the dropping process. The pH of the mixture is about 9.5, and it is vigorously stirred for aging. The temperature condition of the aging treatment is 30-60° C., and the time is 2-4 hours. After the dropwise addition is completed, the aged mixed solution is obtained.

[0038] 4. Transfer the aged mixed solution into a stainless steel hydrothermal reaction kettle for crystallization at 110° C. ...

Embodiment 2

[0047] According to the catalyst preparation method in Example 1, catalysts with different copper-magnesium-aluminum ratios were prepared. Under the same activity evaluation conditions, the results are shown in Table 1 below.

[0048] Table 1 Evaluation results of catalyst activity with different molar ratios of copper, magnesium and aluminum

[0049]

[0050] It can be seen from the above table: according to the catalyst preparation method of Example 1, the copper-based catalysts with different molar ratios have good catalytic performance, and the conversion rate of raw materials is more than 99%. Under normal circumstances, the selectivity to o-phenylphenol can still reach more than 83%.

[0051] Illustrate that the catalyst prepared by this method has higher catalytic activity. When the copper-magnesium-aluminum mol ratio is 2.5:3.5:2, the conversion rate of raw materials reaches 99.93%, the selectivity of the target product o-phenylphenol reaches 89.54%, and the catalyt...

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Abstract

The invention discloses a preparation method of a high-dispersion copper-based catalyst based on non-precious metal, and relates to a production technique of a catalyst in medicine and a dye. The method comprises the steps of dissolving copper salt, magnesium salt and aluminum salt in deionized water, compounding a solution A, dissolving precipitators sodium carbonate and sodium hydroxide in the deionized water, compounding a solution B, dropwise adding the solution A and the solution B to the deionized water for ageing, transferring the aged mixed solution to a stainless steel hydrothermal reaction kettle for crystallization, filtering, washing, drying, roasting, conducting reduction activation, and obtaining the copper magaluma catalyst used for preparing o-phenylphenol. The method lowers the production cost of o-phenylphenol, and allows active components to achieve length dispersion, and the high-dispersion copper-based catalyst is adopted, so that a conversion rate of cyclohexenyl cyclohexanone reaches above 99.9%, and the selectivity of o-phenylphenol is about 90%.

Description

technical field [0001] The invention relates to the production process of catalysts in medicine and dyes, in particular to the technical field of preparation of highly dispersed copper-based catalysts. Background technique [0002] O-phenylphenol is an important fine organic chemical, which is widely used in medicine, dyestuff and other industries. It can also be used in printing and dyeing auxiliaries, coatings, photosensitive materials and surfactants. With the continuous development of new products using o-phenylphenol as raw materials, the actual demand for o-phenylphenol in domestic and foreign markets has increased significantly in recent years. [0003] There are separation and purification methods and chemical synthesis methods for the production of o-phenylphenol at home and abroad. The separation and purification method is mainly obtained by extracting and separating the by-products of phenol produced by the sulfonated alkali fusion method or the phenol produced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C07C39/15C07C37/07
Inventor 曾勇平杨振威
Owner YANGZHOU UNIV
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