37 results about "Methoxybenzoates" patented technology

The invention provides a preparation method of methyl o-methoxybenzoate. The method comprises the following steps: preparing salicylic acid and potassium hydroxide in a molar ratio of 1:(2-2.4) into an aqueous solution and adding into a reaction device; controlling the temperature to 10-20 DEG C; introducing bromomethane in a stirring condition while performing point-plate tracking of the reaction degree; after the reaction is complete, stopping stirring and standing for layering at room temperature; separating out the potassium bromide-containing wastewater on the lower layer, and concentrating to obtain a byproduct potassium bromide; washing the upper-layer product with saturated salt solution; drying with anhydrous sodium sulfate and performing reduced-pressure distillation; and collecting the fraction at 95-110 DEG C to obtain methyl o-methoxybenzoate. According to the preparation method of methyl o-methoxybenzoate provided by the invention, the technological process is shortened, the reaction time is remarkably reduced, the generation of three wastes is reduced, the wastewater treatment difficulty is relieved, and the treatment power consumption and equipment occupation are greatly reduced.