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Process for continuous preparation of high molecular weight polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acids with diols and/or mixtures thereof and a

A technology for polymer polyester and transesterification, which is applied in chemical/physical/physical-chemical stationary reactors, chemical instruments and methods, chemical/physical processes, etc., and can solve problems such as unsatisfactory polymers

Active Publication Date: 2009-06-17
UHDE INVENTA FISCHER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the molecular weight expressed in terms of repeating units (DP), it is not possible in all cases to utilize the polymers produced directly for the production without going through a separate and complex solid phase finishing process. Bottle pellets and preforms, therefore, the polymers obtained by the above-mentioned prior art still appear to be unsatisfactory at present

Method used

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  • Process for continuous preparation of high molecular weight polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acids with diols and/or mixtures thereof and a
  • Process for continuous preparation of high molecular weight polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acids with diols and/or mixtures thereof and a
  • Process for continuous preparation of high molecular weight polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acids with diols and/or mixtures thereof and a

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Embodiment Construction

[0048] Fig. 2 is a schematic flow sheet of the polyester production method in the present invention. The process of the method according to the invention basically corresponds to the latest state of the art described in WO 03 / 042278 A1 already mentioned initially. The essence of the method of the present invention is to improve the tower reactor 35 so that the falling film zone is formed in a specific way. subsequent image 3 The precise construction and process of the falling film zone, as realized in a tower reactor, is described in more detail. The second main element in the process of the invention that should be mentioned is the final reactor 25 . Compared with the devices of the prior art, especially compared with the device described in DE 44 47 422 C2, the terminal reactor 25 of the present invention is different in that it has a rotating rotor with at least one Partial heating. Thus, in combination with the particular configuration described in more detail in Figu...

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Abstract

The present invention relates to a method for the continuous production of high-molecular polyesters by esterification of dicarboxylic acids and / or transesterification of dicarboxylic acid esters with diols and / or mixtures thereof in the presence of catalysts with formation of a prepolymer in a tower reactor and polycondensation thereof to form a high-molecular polyester in a polycondensation reactor, a prepolymer with >40 to 70 repeat units (DP) being produced in the tower reactor and this prepolymer being polycondensed in only one further reactor to form a polyester with >150 to 205 DP.

Description

technical field [0001] The present invention relates to a kind of method of continuous production polymer polyester, according to the feature described in claim 1, under catalysis, through the esterification of dicarboxylic acid and / or dicarboxylic acid ester and diol and / or its mixture Transesterification reaction to prepare polymer polyester. The polyester in the present invention includes polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (polynaphthaleneterephthalate, PEN), polyterephthalate Polyesters of propylene glycol esters (PTT) and / or other dicarboxylic acids and glycols including copolymers thereof. The invention also relates to a plant for the continuous production of polymeric polyesters, comprising at least one tower reactor and at least one terminal reactor having the features of claim 18 . Background technique [0002] It is known from WO 03 / 042278 A1 to describe a general method and apparatus for the production of...

Claims

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Application Information

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IPC IPC(8): B01J19/18B01J19/24C08G63/78
CPCB01J2219/1943B01J2219/0077C08G63/83B01J2219/185B01J2219/00087B01J19/247C08G63/785B01J2219/00006C08G63/85B01J2219/00094B01J2219/00085B01J2219/00779B01J2219/00159B01J19/18C08G63/78B01J2219/00081B01J2219/00083B01J2219/00103B01J19/1862B01J2219/0011B01J19/20B01J2219/00768B01J2219/00092B01J2219/182B01J19/24C08G63/82
Inventor 艾克·舒尔茨·范·恩德尔特
Owner UHDE INVENTA FISCHER