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Alcohol oxidation aldehyde ketone production applied novel catalyst and preparation method thereof

A catalyst and alcohol oxidation technology, which is applied in the preparation of organic compounds, oxidation of carbonyl compounds, physical/chemical process catalysts, etc., can solve the problems of low utilization rate of oxidant atoms, large amount of three wastes, heavy pollution, etc., and achieve reusability Good, easy-to-separate, source-rich effects

Active Publication Date: 2017-07-21
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditionally, oxidants such as chromate, permanganate, and organic peracids are mostly used in the oxidation reaction of alcohols. These oxidants have low atom utilization, large amounts of three wastes, and heavy pollution. Therefore, environmentally friendly oxidants (such as air, oxygen, and peroxides) are used. Hydrogen oxide, etc.) instead of traditional oxidants will make the selective oxidation of alcohols have a wider prospect of industrial application

Method used

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preparation example Construction

[0022] A preparation method for a novel catalyst for alcohol oxidation to produce aldehydes and ketones, said preparation comprising the steps of:

[0023] (1) Prepare a mixed colloidal aqueous solution of magnesium oxide, aluminum oxide and carbonate, the molar ratio of magnesium and aluminum content is 2.0-5.0, the total ion concentration of magnesium and aluminum is 2.0-5.0 mol / L; carbonate and oxide The molar amount of aluminum is the same; after stirring vigorously at room temperature for 1 to 6 hours, place it in a crystallization kettle at 60 to 120 ° C for 6 to 24 hours, then filter or centrifugally dehydrate the obtained colloid, wash with water until neutral, 60 ~100°C drying, the obtained solid sample is calcined at 200~400°C for 4~16 hours to obtain the corresponding magnesium-aluminum composite oxide; the carbonate is one of ammonium carbonate, sodium carbonate, and potassium carbonate ;

[0024] (2) Prepare the colloidal aqueous solution of 40-600 mesh magnesium...

Embodiment 1

[0029] 2 mol MgO, 1 mol Al 2 o 3 and 1 mol of sodium carbonate with deionized water to make 1.5 L of colloid; vigorously stirred at room temperature for 1.0 hour, placed in a crystallization kettle for 6 hours to crystallize at 60 °C, filtered, washed with water until neutral, and dried at 60 °C to obtain The solid sample was calcined at 200 °C for 4 hours to obtain the corresponding magnesium-aluminum composite oxide; it was ground into a 40-mesh powder and placed in water, and NH 4 The pH value was controlled by OH to be 9.0, aged under vigorous stirring at 40 °C for 12 hours, filtered, washed with water until neutral, and dried at 60 °C to obtain the carrier magnesium-aluminum hydrotalcite compound. Take 0.1 mol of ligand L1 and dissolve it in 100 mL of dichloromethane, add 100 mL of concentrated sulfuric acid and 300 mL of oleum dropwise at the same time, react at room temperature for 24 hours, add 500 g of ice-water mixture, and use 6 mol / L neutralized NaOH solution to ...

Embodiment 2

[0031] 6 mol MgO, 1.2 mol Al 2 o 3 and 1.2 mol of sodium carbonate with deionized water to prepare 1.5 L of colloid; vigorously stirred at room temperature for 6.0 hours, placed in a crystallization kettle for 24 hours at 120°C to crystallize, filtered, washed with water until neutral, and dried at 100°C to obtain The solid sample was calcined at 400 °C for 16 hours to obtain the corresponding magnesium-aluminum composite oxide; it was ground into a 600-mesh powder and placed in water, the pH value was adjusted to 11.0 with sodium hydroxide, and the aging was vigorously stirred at 80 °C for 36 hours. Filter, wash with water until neutral, and dry at 100°C to obtain a carrier magnesium-aluminum hydrotalcite compound. Take 0.1 mol of ligand L2 and dissolve it in 100 mL of dichloromethane, add 100 mL of concentrated sulfuric acid and 300 mL of oleum dropwise at the same time, react at room temperature for 24 hours, add 500 g of ice-water mixture, and use 6 mol / L The NaOH soluti...

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Abstract

The invention discloses an alcohol oxidation aldehyde ketone production applied novel catalyst and a preparation method thereof. According to the alcohol oxidation aldehyde ketone production applied novel catalyst, hydrotalcite-like compounds serve as the carrier, metal complexes which is one or two of V, Cr, Mn, Fe, Co, Ni, Cu, Au, Pd, and Pt serve as a catalytic oxidative activity center, and the content of carried metal elements is 0.03-5.00% of the total mass of the alcohol oxidation aldehyde ketone production applied novel catalyst. The invention also discloses the preparation method of the alcohol oxidation aldehyde ketone production applied novel catalyst. According to the alcohol oxidation aldehyde ketone production applied novel catalyst and the preparation method thereof, alcohol and oxidants serve as the raw materials, under the action of the prepared alcohol oxidation aldehyde ketone production applied novel catalyst, high ketone conversion rate and high aldehyde ketone absorbing rate can be achieved; meanwhile, no acid or alkali or organic additives exist in a reaction system, so that the alcohol oxidation aldehyde ketone production applied novel catalyst has the advantages of being high in yield rate, low in cost, free from environmental pollution, easy to separate, high in repeatability and the like. Meanwhile, the preparation method of the alcohol oxidation aldehyde ketone production applied novel catalyst has the advantages of being rich in raw material resource, free from environmental pollution and the like.

Description

technical field [0001] The invention belongs to the field of new materials and technologies, and in particular relates to a novel catalyst for producing aldehydes and ketones by oxidation of alcohols and a preparation method thereof. Background technique [0002] The increasing depletion of petroleum resources not only brings energy crisis to human beings, but also leads to the shortage of various chemical raw materials, so it is necessary to seek sustainable renewable substitutes for chemical raw materials. Aldehydes and ketones are necessary raw materials and intermediates in many chemical production processes, and their demand has been increasing day by day in recent years. Aldehydes and ketones are mainly produced by the oxidation of alcohols, and alcohols can be widely derived from various biomass, so the direct oxidation of alcohols to aldehydes and ketones is expected to provide abundant raw materials for chemical production; but an environmentally friendly, efficient...

Claims

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Application Information

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IPC IPC(8): B01J31/26C07C45/38C07C47/54C07C47/052C07C47/07C07C47/02C07C45/29C07C47/232C07C47/19C07C45/39C07C49/17
Inventor 吴功德王晓丽吕小笛苏铖郭明山陶炳池朱锐
Owner NANJING INST OF TECH
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