22-10-2015 дата публикации
Номер: US20150299385A1
Принадлежит:
Provided are a device and a method for efficiently producing a polyester by using 1,4-butanediol as a starting material. The device for producing a polyester includes: a preparation tank () for starting material slurry; a storage tank () for starting material slurry; an esterification reactor (); an initial polycondensation reactor (); a middle polycondensation reactor (); and a final polycondensation reactor (). An exhaust system for each of the initial, middle, and final polycondensation reactors includes a wet condenser (, or ) using a liquid containing 1,4-butanediol as a coolant; and a hot well (, or ) connected to the corresponding wet condenser. Herein, process scattered substances scattering with exhaust are collected, and hydrolyzed in the hot well, so as to be returned to the esterification step. This allows the polyester to be efficiently produced. 1. A device for producing a polyester by using 1 ,4-butanediol as a starting material , the device comprising:an esterification reactor for producing an ester of 1,4-butanediol; a wet condenser that uses a coolant containing 1,4-butanediol and being kept from 20° C. to 100° C.; and', 'a hot well whose liquid temperature is kept from 20° C. to 100° C. and connected to the wet condenser., 'the exhaust system comprising, 'an exhaust system for the polycondensation reactor,'}, 'a polycondensation reactor connected to the esterification reactor; and'}2. The device for producing a polyester according to claim 1 , wherein the hot well is connected to the esterification reactor.3. The device for producing a polyester according to claim 2 , further comprising a warmed pipe for connecting the hot well to the esterification reactor.4. The device for producing a polyester according to claim 1 , wherein the coolant introduced into the wet condenser is heated.5. The device for producing a polyester according to claim 1 , wherein the polyester is polybutylene succinate.6. The device for producing a polyester according to ...
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