Method for continuous production of biodegradable aliphatic/aromatic polyester copolymer
An aromatic polyester, aliphatic degradation technology, applied in the field of continuous manufacturing of biodegradable aliphatic/aromatic polyester copolymers, which can solve problems such as failures
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Embodiment 1
[0145] Embodiment 1: biodegradable PBAT (poly (butylene adipate-co-terephthalate), poly (hexyl Manufacture of diacid-co-butylene terephthalate))
[0146] [1st slurry tank]
[0147] 1,4-butanediol and adipic acid in a molar ratio of 1.3:0.52 were added to the first slurry tank, and mixed while stirring at 70°C to prepare a slurry.
[0148] [1 esterification reaction]
[0149] The primary esterification reaction of 1,4-butanediol and adipic acid was implemented while the slurry in the 1st slurry tank was continuously charged into the primary esterification reactor. At this time, the conditions are that the flow rate is about 35 kg / h, the reaction temperature is 180° C., and the pressure is normal pressure.
[0150] As the reactor for the above-mentioned primary esterification reaction, a vertical reactor (refer to http: / / www.hado) equipped with a stirrer with a pitched paddle impeller (Hado, Korea) of HADO Co., Ltd. was used. .co.kr / default1.html). Triphenyl phosphate and ...
Embodiment 2
[0179] Embodiment 2: the manufacture of biodegradable PBAT
[0180] [1 esterification reaction]
[0181] Add 1,4-butanediol and adipic acid in a molar ratio of 1.3:0.52 to a batch reactor, and perform an esterification reaction at 180° C. under normal pressure to obtain bishydroxybutylene adipate ( bishydroxy butylene adipate, hereinafter referred to as BHBA), and store it in the storage tank.
[0182] The water generated during the above-mentioned esterification reaction is removed by a condenser, and triphenyl phosphate and tetra-n-butyl titanate are continuously added to the batch reactor used for the above-mentioned esterification reaction of 1,4-butanediol and adipic acid ester. Triphenyl phosphate and tetra-n-butyl titanate were pre-mixed at a concentration of 10% by weight relative to 1,4-butanediol, and then continuously fed into a batch reactor. Triphenyl phosphate and tetra-n-titanate The content of butyl ester is 0.1 g and 0.3 g per 0.52 mole of adipic acid.
...
Embodiment 3
[0202] Embodiment 3: the manufacture of biodegradable PBAT
[0203] [1st slurry tank]
[0204] 1,4-butanediol, adipic acid, and terephthalic acid were added to the first slurry tank at a molar ratio of 1.3:0.52:0.48, and stirred and mixed at 60° C. to prepare a slurry.
[0205] [1 esterification reaction]
[0206] The esterification reaction was carried out while continuously charging the slurry prepared in the first slurry tank into the primary esterification reactor. The conditions at this time were flow rate 48 kg / h, reaction temperature 180° C., and pressure normal pressure.
[0207] Triphenyl phosphate and tetra-n-butyl titanate were added to the reaction mixture in the primary esterification reactor to perform esterification reaction.
[0208] The aforementioned triphenyl phosphate and tetra-n-butyl titanate were mixed in advance so as to have a concentration of 10% by weight relative to 1,4-butanediol, and then continuously charged. Adjust the flow rate so that th...
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