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 of polymer polyester and transesterification reaction, applied in chemical/physical/physicochemical fixed reactors, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as unsatisfactory polymers
Active Publication Date: 2011-10-12
UHDE INVENTA FISCHER
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- 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
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[0053] figure 2 It is a schematic flow diagram 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. Therefore, combined with Figure 4-7 With the special configuration described...
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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 invention relates to a method for continuously producing high molecular polyester, that is, the high molecular polyester is prepared through the esterification of dicarboxylic acid and / or the transesterification reaction between dicarboxylic acid ester and diol under the action of catalysis. 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 present invention also relates to a device for continuous production of high-molecular polyester, which device includes at least one tower reactor and at least one terminal reactor. Background technique [0002] It is known from WO 03 / 042278 A1 to describe a general method and apparatus for the production of corresponding polyesters. [0003] In t...
Claims
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IPC IPC(8): B01J19/18B01J19/24C08G63/78
CPCB01J19/18B01J19/1862B01J19/20B01J19/247B01J2219/00006B01J2219/00081B01J2219/00083B01J2219/00085B01J2219/00087B01J2219/00092B01J2219/00094B01J2219/00103B01J2219/0011B01J2219/00159B01J2219/00768B01J2219/0077B01J2219/00779B01J2219/182B01J2219/185B01J2219/1943C08G63/78C08G63/785C08G63/83C08G63/85B01J19/24C08G63/82
Inventor 艾克·舒尔茨·范·恩德尔特
Owner UHDE INVENTA FISCHER