Hydrocarbon catalyzed selective oxidation method

A technology of selective oxidation and hydrocarbons, applied in the field of catalytic application of nanomaterials, it can solve the problems of excessive oxidation reaction, difficult activation, small polarity, etc., and achieve the effect of high conversion rate

Inactive Publication Date: 2012-10-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the C-C bonds and C-H bonds that constitute hydrocarbons have the characteristics of large bond energy and low polarity, so activation is difficult, resulting in low reactivity; Lively, it is easy to over-oxidize to produce by-products such as carbon dioxide and water, and its selectivity is the lowest among all kinds of catalytic reactions
This not only causes resource waste and environmental pollution, but also brings great difficulties to the separation and purification of products, which greatly increases investment and production costs.
[0004] In order to improve the efficiency of catalytic selective oxidation of hydrocarbons, different types of catalysts have come out one after another, but these catalysts can be classified as hydrophilic catalysts, which are not conducive to the adsorption and reaction of weakly polar substrate hydrocarbons on the surface of the catalyst, but are beneficial The adsorption of polar product molecules can easily lead to excessive oxidation reactions
At the same time, the water generated by the reaction is also more easily adsorbed on the surface of the catalyst, which further hinders the conversion of substrate hydrocarbons.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 material A (HF-Co-SiO 2 ) preparation

[0026] Mix 20g of Np-10, 25g of cyclohexane and 3g of n-octanol to obtain solution A; dissolve 0.02g of cobalt acetate in 3g of deionized water, and add 0.5g of ammonia water to obtain solution B; 1g of ethyl orthosilicate and 0.2g Mix heptadecafluorodecyltriethoxysilane to obtain solution C; pour solution B into solution A to obtain solution D, add solution C to solution D under vigorous stirring, and age for 8 hours; then, add 10ml of acetone and stir for 30m , centrifuged to obtain a light blue solid; add 30ml of ethanol to this solid, heat and stir for 10m, and centrifuge; repeat this step several times until the surfactant is completely removed; dry at 80°C to obtain the final nanomaterial HF-Co-SiO 2 .

Embodiment 2

[0027] The preparation of embodiment 2 material B-L

[0028] The preparation method of material B-L is the same as that of material A, the difference lies in the type of metal source or alkyl triethoxysilane, the specific metal source and the type of alkyl triethoxysilane used are shown in Table 1, the obtained material Listed in Table 1.

[0029] The metal source and the type of alkyltriethoxysilane used in the preparation of material B-L in table 1

[0030]

Embodiment 3

[0031] Embodiment 3 material M (Ph-Mn-SiO 2 ) preparation

[0032] Mix 15g sodium dodecylbenzenesulfonate, 35g n-hexane, 6g n-hexanol and 0.5g ammonia water to obtain solution A; dissolve 0.02g manganese acetate in 3g deionized water to obtain solution B; Mix phenyltriethoxysilane to obtain solution C; add solution B and solution C to solution A under stirring conditions, and age for 20 hours; add 15ml of acetone, stir for 20m, and centrifuge to obtain a brown solid; add 60ml of ethanol to the solid , heated and stirred for 15m, centrifuged; repeated this step several times until the surfactant was removed; dried at 100°C to obtain the final nanomaterial Ph-Mn-SiO 2 .

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Abstract

Disclosed is a hydrocarbon catalyzed selective oxidation method. Super hydrophobic nano-sized complex oxide material is used as catalyst to apply to a solvent-free hydrocarbon selective oxidation reaction. Due to the super hydrophobic property of the material, absorption of substrate and desorption of product are facilitated, and high conversion rate and selectivity of organic oxygen-contained compounds (alcohol, ketone, aldehyde, and (or) acid) are obtained simultaneously.

Description

technical field [0001] The invention belongs to the catalytic application of nanometer materials, specifically, a superhydrophobic nanocomposite oxide material is applied to catalytic selective oxidation reactions of hydrocarbons to obtain highly selective alcohols, ketones (aldehydes), acids, etc. Oxygenated organic compounds. Background technique [0002] Today, with the rapid increase in oil prices and the dwindling fossil resources that can be exploited, how to use limited resources safely, greenly and effectively to create maximum value has become a topic of common concern to mankind. Alkanes are the main components of oil and natural gas, but there are few very efficient ways to convert them directly into more valuable products, mainly due to their inert chemical properties. Alkanes are rich in a large number of C-C bonds and C-H bonds, and alcohols, aldehydes, ketones, acids and esters, which are widely used in fine chemical production, contain not only C-C bonds and...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J31/36B01J31/38B01J31/34B01J31/26C07B41/02C07B41/06C07B41/08C07C27/14C07C35/12C07C49/403C07C55/14C07C33/22C07C47/54C07C63/06C07C49/78C07C33/18C07C35/20C07C35/06C07C35/36C07C47/542C07C49/413C07C49/395C07C49/637C07C63/04C07C55/16C07C55/02C07C55/12
Inventor 陈晨徐杰张巧红王敏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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