MANUFACTURING METHOD OF METHYL-4-HYDROXYIMINOMETHYLBENZOATE CAPABLE OF OBTAINING METHYL-4-HYDROXYIMINOBENZOATE FROM BY-PRODUCT SIMPLY AND ECONOMICALLY

摘要

PURPOSE: A manufacturing method of methyl-4-hydroxyiminomethylbenzoate is provided to manufacture methyl-4-hydroxyiminobenzoate through simple and economical work-up process, by using the difference of solubility to alcohol.;CONSTITUTION: A manufacturing method of methyl-4-hydroxyiminomethylbenzoate comprises: a step of adding alcohol into a reaction by-product containing methylformylbenzoate, manufactured during the manufacturing process of DMT, and filtering the product; a step of converting methylformylbenzoate in the filtered liquid through oximation by adding hydroxylamine or inorganic acid salt and alkali components into the filtered liquid ; and a step of purifying the generated methyl 4-hydroxyiminomethylbenzoate mixture.;COPYRIGHT KIPO 2012