System and method for manufacturing ester-based composition

Abstract

The present disclosure relates to a method and a system for manufacturing an ester-based composition which are characterized in sequentially operating a plurality of batch reactors, and since an ester-based composition is semi-continuously manufactured, the productivity is high and the stability of a batch reactor is secured.

1 - 7 . (canceled) 
     
     
         8 . A method for manufacturing an ester-based composition, the method comprising:
 a step S 1  of injecting a polycarboxylic acid and a first alcohol having 3 to 10 alkyl carbon atoms into a mixer to form a reaction mixture;   a step S 2  of sequentially injecting the reaction mixture into N number of batch reactors connected in parallel to perform a reaction such that the reaction is sequentially completed in the N number of batch reactors to semi-continuously manufacture reaction products; and   a step S 3  of semi-continuously moving the reaction products into a separation unit to remove unreacted alcohol,   wherein N is an integer of 3 or greater.   
     
     
         9 . The method of  claim 8 , further comprising
 a step S 1 - 1  of adding a catalyst to the reaction mixture between the step S 1  and the step S 2 ; or   a step S 1 - 2  of adding a catalyst to the polycarboxylic acid and the first alcohol having 3 to 10 alkyl carbon atoms before the step S 1 .   
     
     
         10 . The method of  claim 9 , wherein the catalyst is tetraalkyl titanate. 
     
     
         11 . The method of  claim 8 , wherein the step S 1  further comprises a step in which the reaction mixture is heated to 50-200° C. 
     
     
         12 . The method of  claim 8 , wherein the temperature at which the reaction of the step S 2  is performed is 130-250° C. 
     
     
         13 . The method of  claim 8 , further comprising a step S 4  of injecting a second alcohol having 3 to 10 alkyl carbon atoms into the reaction products from which the unreacted alcohol is removed to perform a trans-esterification reaction, wherein the second alcohol injected in the step S 4  is different from the first alcohol injected in the step S 1 .