Polytrimethylene terephthalate and production method thereof

Polytrimethylene terephthalate and production method thereof

  • CN 104,629,021 A
  • Filed: 02/15/2015
  • Published: 05/20/2015
  • Est. Priority Date: 02/15/2015
  • Status: Active Application
First Claim
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1. produce the method for Poly(Trimethylene Terephthalate) for one kind, the method comprises terephthalic acid and 1, ammediol carries out esterification successively, prepolymerization reaction and polycondensation, it is characterized in that, described esterification comprises the initial esterification reaction and whole esterification of carrying out successively, described prepolymerization reaction comprises the low temperature prepolymerization reaction and high temperature prepolymerization reaction that carry out successively, described whole esterification and low temperature prepolymerization reaction are plug flow reaction, and described whole esterification with the temperature of reaction of described low temperature prepolymerization reaction identical or different and 1-10 DEG C lower than the temperature of reaction of described initial esterification reaction independently of one another, the reaction pressure 10-100kPa lower than the reaction pressure of described whole esterification of described low temperature prepolymerization reaction, the temperature of reaction 1-20 DEG C lower than the temperature of reaction of described high temperature prepolymerization reaction of described low temperature prepolymerization reaction.

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