PRODUCTION OF POLYESTER
PROBLEM TO BE SOLVED: To provide a method for industrially and advantageously producing a high-quality polyester by reutilizing a distilled glycol produced in each step as a part or the total amount of raw materials. SOLUTION: Terephthalic acid and a glycol are fed to esterification reactors 3 and 4...
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| creator | KIMURA KIYOSHI OTAKE SHOICHI MURAI MASUO KIMURA ISAMU IWATA NOBUHARU |
| description | PROBLEM TO BE SOLVED: To provide a method for industrially and advantageously producing a high-quality polyester by reutilizing a distilled glycol produced in each step as a part or the total amount of raw materials. SOLUTION: Terephthalic acid and a glycol are fed to esterification reactors 3 and 4 to carry out the esterification reaction and the resultant ester low polymer is then fed to polycondensation reactors 11 to 13 to conduct the polycondensation. Thereby, a polyester is produced. A distillate discharged from the polycondensation reactors 11 to 13 or esterification reactors 3 and 4 and consisting essentially of the glycol as a cooling liquid for condensing a gas produced in the esterification reaction is sprayed into a partial condenser 5. The resultant partial condensate is filtered to separate undissolved substances. The separated filtrate is subsequently reutilized as a part or the total amount of the raw materials. |
| format | Patent |
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SOLUTION: Terephthalic acid and a glycol are fed to esterification reactors 3 and 4 to carry out the esterification reaction and the resultant ester low polymer is then fed to polycondensation reactors 11 to 13 to conduct the polycondensation. Thereby, a polyester is produced. A distillate discharged from the polycondensation reactors 11 to 13 or esterification reactors 3 and 4 and consisting essentially of the glycol as a cooling liquid for condensing a gas produced in the esterification reaction is sprayed into a partial condenser 5. The resultant partial condensate is filtered to separate undissolved substances. 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| subjects | CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP |
| title | PRODUCTION OF POLYESTER |
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