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US 11,512,166 B2Granted
Method and system for manufacturing ester-based composition
AssigneeLG Chem, Ltd.
InventorsHyun Kyu Kim, Jeong Ju Moon, Hyoung Jun, Sung Kyu Lee, Chan Hyu Jin, Joo Ho Kim
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Abstract
The present disclosure relates to a method for continuously manufacturing an ester-based composition and a manufacturing system therefor, the method improving a manufacturing yield by optimizing process variables of each reactor of a reaction unit in which a plurality of reactors are connected in series.
Claims12
A method for manufacturing an ester-based composition, the method comprising:
- a step S1 of injecting a polycarboxylic acid and an alcohol having 3 to 10 alkyl carbon atoms into a mixer to form a reaction mixture;
- a step S2 of continuously injecting the reaction mixture into a reaction unit in which a total of N reactors are connected in series from a first reactor to an N-th reactor, thereby continuously manufacturing reaction products;
- a step S3 of continuously moving the reaction products into a separation unit to remove the unreacted alcohol;
- and
- a step S4 of injecting the unreacted alcohol removed from the separation unit back into any one reactor of the reaction unit, wherein N is an integer of 3 or greater, and Formulas 1) and 2) are satisfied:
- Tn1-1≤Tn1 1)
- En2-1≥En2≥E1 2)
- wherein, in Formulas 1) and 2), n1 is an integer of 2 to N, and n2 is an integer of 3 to N,
- Tx=Temperature of an x-th reactor
- Ex={(Number of moles of the alcohol injected into an x-th reactor−c*Number of moles of polycarboxylic acid injected into an x-th reactor)/(c*Number of moles of polycarboxylic acid injected into the first reactor)*100%}
- wherein c is the number of carboxylic acid groups contained in one molecule of the polycarboxylic acid, and in Tx and Ex, x is an integer of 1 to N.
8 more elements
A system for manufacturing an ester-based composition, the system comprising:
- a mixer in which a reaction mixture of a polycarboxylic acid and an alcohol having 3 to 10 alkyl carbon atoms is formed;
- a reaction unit having N number of reactors connected in series in which an esterification reaction of the reaction mixture is performed, wherein N is an integer of 3 or greater;
- a separation unit including one or more separation columns for receiving reaction products and removing the unreacted alcohol therefrom;
- a recovery unit for injecting the unreacted alcohol removed from the separation unit back into a reactor of the reaction unit;
- and
- a variable control unit that controls the temperature of each reactor and the amount of the alcohol injected into the reactor to satisfy Formulas 1) and 2) below:
- Tn1-1≤Tn1 1)
- En2-1≥En2≥E1 2)
- wherein, in Formulas 1) and 2), n1 is an integer of 2 to N, and n2 is an integer of 3 to N,
- Tx=Temperature of an x-th reactor
- Ex={(Number of moles of the alcohol injected into an x-th reactor−c*Number of moles of polycarboxylic acid injected into an x-th reactor)/(c*Number of moles of polycarboxylic acid injected into the first reactor)*100%}
- wherein c is the number of carboxylic acid groups contained in one molecule of the polycarboxylic acid, and in Tx and Ex, x is an integer of 1 to N.
9 more elements
Dependencies are inferred from the claim text.