JPS5710626A - Treatment of by-products in manufacturing polyester - Google Patents

Treatment of by-products in manufacturing polyester

Info

Publication number
JPS5710626A
JPS5710626A JP8395480A JP8395480A JPS5710626A JP S5710626 A JPS5710626 A JP S5710626A JP 8395480 A JP8395480 A JP 8395480A JP 8395480 A JP8395480 A JP 8395480A JP S5710626 A JPS5710626 A JP S5710626A
Authority
JP
Japan
Prior art keywords
ethylene glycol
residue
methanol
solid
recovered
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.)
Granted
Application number
JP8395480A
Other languages
Japanese (ja)
Other versions
JPS6354733B2 (en
Inventor
Kazuo Takayanagi
Takeshi Arakawa
Minao Tanba
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP8395480A priority Critical patent/JPS5710626A/en
Publication of JPS5710626A publication Critical patent/JPS5710626A/en
Publication of JPS6354733B2 publication Critical patent/JPS6354733B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To recover ethylene glycol in high efficiency and to obtain a residue in solid form, by feeding continuously a concentrated residue prepared by recovering partially methanol and ethylene glycol from a distillate occurring as by-products during ester exchange reaction to a gas-solid separator.
CONSTITUTION: Methanol and ethylene glycol are partially purified by distillation and recovered from methanol, ethylene glycol, unreacted dimethyl terephthalate, bis- β-hydroxyethyl terephthalate, and a composition of its oligomer, distilling as by- products during ester exchange reaction of polyethylene terephthalate production process. The distillation residue is fed continuously to a gas-solid separator under 0.5W4mmHg at 50W150°C, so that ethylene glycol is recovered and the concentration residue is collected as a flaky solid material.
EFFECT: Ethylene glycol is directly used for polymerization reaction, and the solid residue is burnt easily.
COPYRIGHT: (C)1982,JPO&Japio
JP8395480A 1980-06-23 1980-06-23 Treatment of by-products in manufacturing polyester Granted JPS5710626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8395480A JPS5710626A (en) 1980-06-23 1980-06-23 Treatment of by-products in manufacturing polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8395480A JPS5710626A (en) 1980-06-23 1980-06-23 Treatment of by-products in manufacturing polyester

Publications (2)

Publication Number Publication Date
JPS5710626A true JPS5710626A (en) 1982-01-20
JPS6354733B2 JPS6354733B2 (en) 1988-10-31

Family

ID=13816967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8395480A Granted JPS5710626A (en) 1980-06-23 1980-06-23 Treatment of by-products in manufacturing polyester

Country Status (1)

Country Link
JP (1) JPS5710626A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4886997A (en) * 1972-02-22 1973-11-16

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4886997A (en) * 1972-02-22 1973-11-16

Also Published As

Publication number Publication date
JPS6354733B2 (en) 1988-10-31

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