JPS56118420A - Production of polyester - Google Patents

Production of polyester

Info

Publication number
JPS56118420A
JPS56118420A JP2156680A JP2156680A JPS56118420A JP S56118420 A JPS56118420 A JP S56118420A JP 2156680 A JP2156680 A JP 2156680A JP 2156680 A JP2156680 A JP 2156680A JP S56118420 A JPS56118420 A JP S56118420A
Authority
JP
Japan
Prior art keywords
polyester
low
cyclic oligomers
heated
cyclic
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
JP2156680A
Other languages
Japanese (ja)
Inventor
Tamio Arakawa
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.)
Teijin Ltd
Original Assignee
Teijin 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 Teijin Ltd filed Critical Teijin Ltd
Priority to JP2156680A priority Critical patent/JPS56118420A/en
Publication of JPS56118420A publication Critical patent/JPS56118420A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain at low cost a polyester which has low cyclic oligomer content and produces molded articles of good quality, by a method wherein the polyester is heated in a solid state in the presence of water to partially hydrolyze low-molecular substances contained in the polyester.
CONSTITUTION: When the amount of low-molecular cyclic oligomers, which is contained in a polyester contg. polyethylene terephthalate and ethylene terephthalate group as the main components, is reduced, the fine particles of the polyester having an instrinsic viscosity of pref. 0.3W1 are heated in a range of 140°C to the melting point thereof and contacted with steam to partially hydrolyze the cyclic oligomers. The reaction is completed at a point at which the content of the cyclic oligomers becomes lower than 1% and the instrinsic viscosity of the polyester is not lowered to 0.1 or below, whereby the desired polyester is obtd.
COPYRIGHT: (C)1981,JPO&Japio
JP2156680A 1980-02-25 1980-02-25 Production of polyester Pending JPS56118420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2156680A JPS56118420A (en) 1980-02-25 1980-02-25 Production of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2156680A JPS56118420A (en) 1980-02-25 1980-02-25 Production of polyester

Publications (1)

Publication Number Publication Date
JPS56118420A true JPS56118420A (en) 1981-09-17

Family

ID=12058565

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2156680A Pending JPS56118420A (en) 1980-02-25 1980-02-25 Production of polyester

Country Status (1)

Country Link
JP (1) JPS56118420A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH037725A (en) * 1989-03-31 1991-01-14 Mitsui Petrochem Ind Ltd Polyethylene terephthalate
JPH0347830A (en) * 1989-03-31 1991-02-28 Mitsui Petrochem Ind Ltd Production of polyethylene terephthalate
JPH0372524A (en) * 1989-05-31 1991-03-27 Mitsui Petrochem Ind Ltd Polyethylene terephthalate
JPH0372523A (en) * 1989-05-31 1991-03-27 Mitsui Petrochem Ind Ltd Polyethylene terephthalate
JPH03174441A (en) * 1989-03-31 1991-07-29 Mitsui Petrochem Ind Ltd Method for treating polyethylene terephthalate
JPH03215521A (en) * 1989-03-31 1991-09-20 Mitsui Petrochem Ind Ltd Polyethylene terephthalate
US6184010B1 (en) 1996-01-22 2001-02-06 Novo Nordisk A/S Enzymatic hydrolysis of cyclic oligomers
WO2004016669A3 (en) * 2002-08-16 2005-12-29 Novozymes North America Inc Process for enzymatic hydrolysis of cyclic oligomers
US7192545B2 (en) 2003-10-10 2007-03-20 Eastman Chemical Company Thermal crystallization of a molten polyester polymer in a fluid
US7329723B2 (en) 2003-09-18 2008-02-12 Eastman Chemical Company Thermal crystallization of polyester pellets in liquid
US7875184B2 (en) 2005-09-22 2011-01-25 Eastman Chemical Company Crystallized pellet/liquid separator
US8022168B2 (en) 2004-09-02 2011-09-20 Grupo Petrotexmex, S.A. de C.V. Spheroidal polyester polymer particles

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH037725A (en) * 1989-03-31 1991-01-14 Mitsui Petrochem Ind Ltd Polyethylene terephthalate
JPH0347830A (en) * 1989-03-31 1991-02-28 Mitsui Petrochem Ind Ltd Production of polyethylene terephthalate
JPH03174441A (en) * 1989-03-31 1991-07-29 Mitsui Petrochem Ind Ltd Method for treating polyethylene terephthalate
JPH03215521A (en) * 1989-03-31 1991-09-20 Mitsui Petrochem Ind Ltd Polyethylene terephthalate
JPH0372524A (en) * 1989-05-31 1991-03-27 Mitsui Petrochem Ind Ltd Polyethylene terephthalate
JPH0372523A (en) * 1989-05-31 1991-03-27 Mitsui Petrochem Ind Ltd Polyethylene terephthalate
US6548278B1 (en) 1996-01-22 2003-04-15 Novozymes A/S Enzymatic hydrolysis of cyclic oligomers
CN1089774C (en) * 1996-01-22 2002-08-28 诺沃奇梅兹有限公司 Enzymatic hydrolysis of cyclic low polymer
US6184010B1 (en) 1996-01-22 2001-02-06 Novo Nordisk A/S Enzymatic hydrolysis of cyclic oligomers
US7183086B2 (en) 1996-01-22 2007-02-27 Novozymes A/S Enzymatic hydrolysis of cyclic oligomers
WO2004016669A3 (en) * 2002-08-16 2005-12-29 Novozymes North America Inc Process for enzymatic hydrolysis of cyclic oligomers
US7329723B2 (en) 2003-09-18 2008-02-12 Eastman Chemical Company Thermal crystallization of polyester pellets in liquid
US7674877B2 (en) 2003-09-18 2010-03-09 Eastman Chemical Company Thermal crystallization of polyester pellets in liquid
US7192545B2 (en) 2003-10-10 2007-03-20 Eastman Chemical Company Thermal crystallization of a molten polyester polymer in a fluid
US8039581B2 (en) 2003-10-10 2011-10-18 Grupo Petrotemex, S.A. De C.V. Thermal crystallization of a molten polyester polymer in a fluid
US8309683B2 (en) 2003-10-10 2012-11-13 Grupo Petrotemex, S.A. De C.V. Thermal crystallization of a molten polyester polymer in a fluid
US8022168B2 (en) 2004-09-02 2011-09-20 Grupo Petrotexmex, S.A. de C.V. Spheroidal polyester polymer particles
US7875184B2 (en) 2005-09-22 2011-01-25 Eastman Chemical Company Crystallized pellet/liquid separator

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