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A nano-ceramic and catalyst technology, applied in the field of nano-ceramic catalysts, can solve problems such as operational hazards, reduced reaction conversion, yield and selectivity, and poor economic benefits
Inactive Publication Date: 2018-03-09
ZHAOQING HI TECH ZONE GUOZHUAN TECH CO LTD
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Problems solved by technology
Although the homogeneous catalyst technology is relatively mature, most of the homogeneous catalysts used in the industry have corrosion equipment; the catalyst itself is corrosive, and the operation is very dangerous; it is necessary to neutralize the reactants and deal with a large amount of soluble salts, and these operations will reduce the conversion of the reaction rate, yield and selectivity, poor economic benefit
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Effect test
Embodiment 1
[0014] Add 50g of zinc chloride, 70g of aluminum chloride, 25g of ferric chloride, 20g of cobalt dichloride, 150g of nano-ceramics and other components into 800g of water and stir evenly, and after aging for 6 hours, dry and grind to 50 meshes, The catalyst was obtained after calcination at 200°C for 15 hours.
[0015] This catalyst was used for the acylation reaction of 1-methoxynaphthalene and acetic acid, and the yield was 94%.
Embodiment 2
[0017] Add 100g of zinc chloride, 50g of boron trifluoride, 30g of aluminum chloride, 55g of ferric chloride, 30g of titanium tetrachloride, 30g of nickel chloride, 25g of cobalt dichloride, 400g of porous silicon carbide and other components into 1500g of water Stir evenly and age for 12 hours, dry and grind into 100-mesh powder, and roast at 300°C for 8 hours to obtain the catalyst.
[0018] This catalyst is used for the reaction of anisole and acetic anhydride, and the yield of p-methoxyacetophenone is 97%.
Embodiment 3
[0020] Add 100g zinc chloride, 55g boron trifluoride, 55g aluminum chloride, 75g titanium tetrachloride, 20g nickel chloride, 60g cobalt dichloride, 500g macroporous silica gel and other components into 2000g water, stir evenly, and age After 15 hours, it was dried and ground to 100 mesh, and then calcined at 250°C for 10 hours to obtain the catalyst.
[0021] When this catalyst is used for the reaction of anisole and acetyl chloride, the yield of methoxyacetophenone is 88%, and the ratio of o-to-para is 88:12.
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Abstract
The invention relates to a nano ceramic catalyst for acylation. The catalyst is prepared from (a) one of zinc chloride and boron trifluoride or a mixture of the zinc chloride and the boron trifluoride, (b) two of aluminum chloride, ferric trichloride, titanium tetrachloride, nickel chloride and cobalt dichloride or a mixture of more than two of the aluminum chloride, the ferric trichloride, the titanium tetrachloride, the nickel chloride and the cobalt dichloride, and (c) a nano ceramic. The nano ceramic catalyst has porosity and the advantages of being good in selectivity, high in activity, long in service life and recyclable, not polluting environment and the like, and is very suitable for industrial production.
Description
technical field [0001] The invention relates to a nano ceramic catalyst for acylation. Background technique [0002] Acylation reaction is an important class of organic synthesis methods, and it is also an industrial production process involved in many cosmetics, fragrances, drugs, agricultural chemicals and other chemical products or their intermediate products. At present, most of the catalysts used in this reaction in industry are homogeneous catalysts, including acid (AlCl 3 , BF 3 , ZnCl 2 、TiCl 4 , FeCl 3 etc.) and acids (HF, H 2 SO 4 , HCl, H 3 PO 4 , p-toluenesulfonic acid, etc.). Although the homogeneous catalyst technology is relatively mature, most of the homogeneous catalysts used in the industry have corrosion equipment; the catalyst itself is corrosive, and the operation is very dangerous; it is necessary to neutralize the reactants and deal with a large amount of soluble salts, and these operations will reduce the conversion of the reaction rate, yie...
Claims
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Application Information
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