JPS5744624A - Apparatus for solid phase polymerization of polyester - Google Patents

Apparatus for solid phase polymerization of polyester

Info

Publication number
JPS5744624A
JPS5744624A JP11980880A JP11980880A JPS5744624A JP S5744624 A JPS5744624 A JP S5744624A JP 11980880 A JP11980880 A JP 11980880A JP 11980880 A JP11980880 A JP 11980880A JP S5744624 A JPS5744624 A JP S5744624A
Authority
JP
Japan
Prior art keywords
polymerization degree
zone
polyester
polymerizer
solid phase
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
JP11980880A
Other languages
Japanese (ja)
Inventor
Toshio Hisaie
Hiroshi Yokoyama
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 JP11980880A priority Critical patent/JPS5744624A/en
Publication of JPS5744624A publication Critical patent/JPS5744624A/en
Pending legal-status Critical Current

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  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To remove aldehyde in a polyester, effectively, and to obtain a polyester having high qualities and high polymerization degree, by dividing the temperature zone of a reactor for the solid phase polymerization of polyester into the zone for the removal of acetaldehyde and the zone for increasing the polymerization degree.
CONSTITUTION: Polyethylene terephthalate polymer pellets having a number- average polymerization degree of, e.g. 80W120, are fed continuously to the solid phase polymerizer 4. At the first temperature zone, the removal of acetaldehyde existing in the polymer as an impurity is accelerated by introducing inert gas through the inlet pipe 6 to the polymerizer keeping the temperature of the polymerizer pref. at 210W220°C, thereby suppressing the increase of the polymerization degree. At the second temperature zone F1 placed below the first temprature zone, the polymer pellets are maintained pref. at 230W240°C to promote mainly the increase of the polymerization degree, and the polycondensation product having a polymerization degree of e.g. 140W200 is taken out of the polymerizer continuously through the extraction valve 5.
COPYRIGHT: (C)1982,JPO&Japio
JP11980880A 1980-09-01 1980-09-01 Apparatus for solid phase polymerization of polyester Pending JPS5744624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11980880A JPS5744624A (en) 1980-09-01 1980-09-01 Apparatus for solid phase polymerization of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11980880A JPS5744624A (en) 1980-09-01 1980-09-01 Apparatus for solid phase polymerization of polyester

Publications (1)

Publication Number Publication Date
JPS5744624A true JPS5744624A (en) 1982-03-13

Family

ID=14770734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11980880A Pending JPS5744624A (en) 1980-09-01 1980-09-01 Apparatus for solid phase polymerization of polyester

Country Status (1)

Country Link
JP (1) JPS5744624A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525614A1 (en) * 1982-04-21 1983-10-28 Inventa Ag PROCESS FOR THE PREPARATION OF HIGH MOLECULAR WEIGHT POLYESTER
WO2007026841A1 (en) * 2005-09-01 2007-03-08 Mitsubishi Chemical Corporation Apparatus for heat treatment of polyester particle and method of multistage solid-phase polycondensation of polyester particle
JP2011527363A (en) * 2008-07-11 2011-10-27 ディーエスエム アイピー アセッツ ビー．ブイ． Method for heat treatment of semi-crystalline polymer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4842236A (en) * 1971-10-04 1973-06-20
JPS5373288A (en) * 1976-12-13 1978-06-29 Teijin Ltd Preparation of polyester pellets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4842236A (en) * 1971-10-04 1973-06-20
JPS5373288A (en) * 1976-12-13 1978-06-29 Teijin Ltd Preparation of polyester pellets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525614A1 (en) * 1982-04-21 1983-10-28 Inventa Ag PROCESS FOR THE PREPARATION OF HIGH MOLECULAR WEIGHT POLYESTER
WO2007026841A1 (en) * 2005-09-01 2007-03-08 Mitsubishi Chemical Corporation Apparatus for heat treatment of polyester particle and method of multistage solid-phase polycondensation of polyester particle
JP2011527363A (en) * 2008-07-11 2011-10-27 ディーエスエム アイピー アセッツ ビー．ブイ． Method for heat treatment of semi-crystalline polymer

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