Zeolite based catalytic process for preparation of acylated aromatic ethers
AssigneeCouncil of Scientific and Industrial Research
InventorsRaksh Jasra, Sengodagounder Muthusamy, Yogiraj Badheka
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Abstract
The present invention relates to an improved zeolite based catalytic process for the preparation of acylated aromatic ethers and more particularly, the invention relates to catalysed acylation of anisole (methoxybenzene) and veratrole (1,2-dimethoxybenzene) for the preparation of acylated aromatic ether, namely, p-methoxyacetophenone and 3,4-dimethoxyacetophenone respectively using microporous alumino-silicates solids like zeolites.
Claims11
A zeolite based catalytic process for the production of acylated aromatic ethers, said process comprising the steps of:—
- a. reacting an aromatic ether selected from a group comprising of anisole and veratrole with an acylating agent at temperature in the range of 80-120° C. for time period in the range of 1 to 8 hours without using any solvent, in the presence of rare earth exchanged zeolite catalyst having general formula:
- M2/nO.Al2O3.xSiO2.wH2O
- wherein:
- M is an alkali and/or lanthanide cation or proton;
- n is valency of M;
- x is in the SiO2/Al2O3 ratio which is in the range of 3 to 24;
- W is the weight of water adsorbed which is in the range of 1 to 20%;
- Si/Al ratio is in the range of 5.5 to 20;
- aromatic ether to catalyst ratio is in the range of 1:3 to 1:5;
- to form an acylated aromatic ether in reaction mixture;
- b. separating the zeolite catalyst from the reaction mixture of step (a);
- and
- c. separating the acylated aromatic ether from the mixture of step (b).
Dependencies are inferred from the claim text.