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Ketone catalyst fabricated by dehydrogenating alcohol, and preparation method

A catalyst and dehydrogenation technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, oxidation to prepare carbonyl compounds, etc., to achieve the effect of simple preparation process, high catalyst selectivity, and less by-product formation

Active Publication Date: 2008-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of existing catalysts for alcohol dehydrogenation to ketones, the present invention provides a catalyst for alcohol dehydrogenation to ketones with simple preparation process, low cost, high activity and stability, and good selectivity for ketones, especially methyl ethyl ketone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] I. Catalyst preparation

[0034] Weigh 261.4g of analytically pure copper nitrate, 314.4g of zinc nitrate dissolved in 1500g deionized water to make a metal salt mixture, dissolve 238g of sodium carbonate in 2100g of deionized water as a precipitant, and weigh industrial grade aluminum hydroxide monohydrate 53.8g of powder was used as a binder, and 2.2g of potassium carbonate was dissolved in 66g of deionized water as an alkali metal solution.

[0035] Add the above-mentioned alkaline precipitant into a 5-liter three-necked flask, heat it to 70°C in an electric heating pot, add the above-mentioned metal salt mixture dropwise while stirring, keep the neutralization reaction temperature at 70±5°C, and control the dripping flow rate, about The dropwise addition was completed in 1 hour. In addition, 10% sodium carbonate solution is used to adjust the pH value at the end of the neutralization reaction, so that the pH value is between 7.0-7.5. After the co-precipitation and...

Embodiment 2

[0040] Weigh 182.3g of analytically pure copper nitrate and 73.1g of zinc nitrate and dissolve them in 700g of deionized water to make a metal salt mixture, and dissolve 111.4g of sodium carbonate in 1000g of deionized water as a precipitating agent, also known as 38.5g of industrial grade hydrogen monohydrate Aluminum oxide powder was used as a binder, and 2.2 g of potassium carbonate was dissolved in 66 g of deionized water to make an alkali metal solution.

[0041] The preparation process was the same as in Example 1 to obtain 50 g of finished catalyst B. The weight percent composition of catalyst B is copper oxide 56%, zinc oxide 19%, aluminum oxide 19%, potassium oxide 3%, and the balance is graphite.

[0042] The dehydrogenation reaction was carried out in the same manner as in Example 1, and the reaction result was: when the conversion rate of sec-butanol was 80.5%, the selectivity of generating methyl ethyl ketone was 96.2%.

Embodiment 3

[0044] Weigh 182.3 g of analytically pure copper nitrate, 36.5 g of zinc nitrate, and 26.3 g of chromium nitrate and dissolve them in 700 g of deionized water to make a metal salt mixture. Dissolve 97.7 g of sodium carbonate in 900 g of deionized water as a precipitant. 48.1 grams of industrial aluminum hydroxide monohydrate powder are used as bonding agent, and 2.2 grams of potassium carbonate are dissolved in 66 grams of deionized water to make alkali metal solution.

[0045] The preparation process was the same as in Example 1 to obtain 50 grams of finished catalyst C. The weight percent composition of the catalyst C is 56% of copper oxide, 9.5% of zinc oxide, 5% of chromium oxide, 23.5% of aluminum oxide, 3% of potassium oxide, and the rest is graphite.

[0046] The dehydrogenation reaction was carried out in the same manner as in Example 1, and the reaction result was: when the conversion rate of sec-butanol was 81.2%, the selectivity of generating methyl ethyl ketone was...

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Abstract

A catalyst for preparing ketone by dehydrogenating alcohol is prepared from Cu as active component, Zn, Cr, or K as active assistant and alumina as carrier through co-depositing, coating alkali metal by immersing or spraying, drying, and calcining. It has high activity and selectivity.

Description

technical field [0001] The invention relates to a catalyst for alcohol dehydrogenation to ketone and a preparation method thereof, more specifically to a catalyst for sec-butanol dehydrogenation to methyl ethyl ketone with copper as the main active component and a preparation method thereof. Background technique [0002] Most alcohol dehydrogenation ketone catalysts use copper as the main active component, and add zinc, chromium, magnesium, calcium and other active additives to form a relatively stable metal mixed crystal with copper, improve the dispersion of copper, and reduce the content of copper , by loading the active components and active auxiliary components on alumina and other carriers to further improve the dispersion of copper crystallites. In the prior art, there are many technical reports on copper-zinc, chromium, magnesium-alumina catalyst systems, such as Chinese patents CN1160152C, CN1150990C and CN1056067A. However, these catalysts are mainly developed for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J37/03C07C45/29C07C49/00
Inventor 余启炎郝雪松杨晓红顾申闫丽梅石翠冷冰刘菊安
Owner CHINA PETROLEUM & CHEM CORP
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