METHOD FOR SYNTHESIZING TEREPHTHALIC ACID BY USING SUBCRITICAL OR SUPERCRITICAL FLUID AS REACTION MEDIUM WHILE USING NO CATALYST TO PROVIDE SAFER AND MORE ECONOMIC METHOD AS COMPARED TO THE CONVENTIONAL METHODS

摘要

PURPOSE: A method for synthesizing terephthalic acid using a subcritical or supercritical fluid as a reaction medium is provided to reduce toxicity and erosion in a manufacturing device owing to excluding the use of a catalyst, thereby being safer and more economic as compared to the conventional methods. CONSTITUTION: The method for synthesizing terephthalic acid which includes the oxidization of para-xylene comprises the use of excessive amount of a subcritical or a supercritical fluid as a reaction medium and hydrogen peroxide or oxygen as an oxidizing agent for partial oxidization of para-xylene contained in a tank(A11), while excluding the use of a catalyst. The oxidization of para-xylene is carried out at 240-400deg.C under 220-300bar in a reactor(A4).