Diao Jiangao
2010
Citations
0
Influential Citations
0
Citations
Journal
Journal of Salt and Chemical Industry
Abstract
This article introduces the process in preparation of 3-bromo-4-hydroxy benzaldehyde using bromine chloride,then made ethyl vanillin through ethoxylation.Influence of reaction temperature,reaction time,mole ratio of raw materials,brominating agent feeding speed and solvent on reaction were considered.On the stage of bromination,using bromine chloride instead of bromine,using trichloromethane as solvent,ethyl acetate as helpful solvent and the yield of monobromide has an increase of 9.4 percent.In the progress of ethoxylation,using CuO as catalysts,the mixture of ethanol and DMF as solvent,and made a study of mole ratio of raw materials and catalyst dosage.The yield rate of final products reach to 82.5 percent.