JPS56112926A - Production of polyester - Google Patents

Production of polyester

Info

Publication number
JPS56112926A
JPS56112926A JP1595580A JP1595580A JPS56112926A JP S56112926 A JPS56112926 A JP S56112926A JP 1595580 A JP1595580 A JP 1595580A JP 1595580 A JP1595580 A JP 1595580A JP S56112926 A JPS56112926 A JP S56112926A
Authority
JP
Japan
Prior art keywords
inert gas
adsorption tower
solid
reactor
polyester
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1595580A
Other languages
Japanese (ja)
Inventor
Hiroshi Yokoyama
Toshio Hisaie
Shunsuke Nokita
Tsuyoshi Sano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1595580A priority Critical patent/JPS56112926A/en
Publication of JPS56112926A publication Critical patent/JPS56112926A/en
Pending legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To obtain a polyester economically, by a method wherein in carrying out a solid-phase polycondensation of a polyethylene terephthalate polymer, an inert gas to be passed through the polymn. mixt. is recycled for use, and at the same time the inert gas is used as a purge gas for desorption and regeneration in an adsorption tower.
CONSTITUTION: A particulate polyethylene terephathalate polymer is continuously supplied from a hopper 2 to a solid-phase polycondensation reactor 1, and subjected to a solid-phase polycondensation reaction, and an inert gas is supplied to the lower part of the reactor 1 to remove impurities such as acetaldehyde. The inert gas is purified in an adsorption tower 7 for purification, and recycled for use. Just before the adsorbent of the adsorption tower 7 is saturated with impurities, gas flow is switched. A fresh inert gas is supplied through a conduit 11. The inert gas which bas passed through the reactor 1, is used as a purge gas for desorption and regeneration in the adsorption tower 7, whereby the amount of the inert gas to be used is reduced to the min. amount and the polyester can be obtd. economically.
COPYRIGHT: (C)1981,JPO&Japio
JP1595580A 1980-02-14 1980-02-14 Production of polyester Pending JPS56112926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1595580A JPS56112926A (en) 1980-02-14 1980-02-14 Production of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1595580A JPS56112926A (en) 1980-02-14 1980-02-14 Production of polyester

Publications (1)

Publication Number Publication Date
JPS56112926A true JPS56112926A (en) 1981-09-05

Family

ID=11903159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1595580A Pending JPS56112926A (en) 1980-02-14 1980-02-14 Production of polyester

Country Status (1)

Country Link
JP (1) JPS56112926A (en)

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