GB829748A - Production of polymeric polymethylene terephthalates - Google Patents

Production of polymeric polymethylene terephthalates

Info

Publication number
GB829748A
GB829748A GB177957A GB177957A GB829748A GB 829748 A GB829748 A GB 829748A GB 177957 A GB177957 A GB 177957A GB 177957 A GB177957 A GB 177957A GB 829748 A GB829748 A GB 829748A
Authority
GB
United Kingdom
Prior art keywords
terephthalate
bis
hydroxyalkyl
chamber
series
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.)
Expired
Application number
GB177957A
Inventor
Thomas Charles Higgins
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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
Priority to BE564025D priority Critical patent/BE564025A/xx
Priority to NL108873D priority patent/NL108873C/xx
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB177957A priority patent/GB829748A/en
Priority to FR1198446D priority patent/FR1198446A/en
Priority to US7502A priority patent/US3054776A/en
Publication of GB829748A publication Critical patent/GB829748A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes
    • C08G63/785—Preparation processes characterised by the apparatus used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/245—Stationary reactors without moving elements inside placed in series
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00051—Controlling the temperature
    • B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
    • B01J2219/00094—Jackets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00164—Controlling or regulating processes controlling the flow
    • B01J2219/00166—Controlling or regulating processes controlling the flow controlling the residence time inside the reactor vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00168—Controlling or regulating processes controlling the viscosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00182—Controlling or regulating processes controlling the level of reactants in the reactor vessel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

An apparatus for the continuous polycondensation of bis-hydroxyalkyl terephthalate comprises a number of closed heated chambers linked in series by heated ducts, a feed inlet for the first chamber for supplying bis-hydroxyalkyl terephthalate and a final outlet from the last chamber for discharging polycondensed material, the inlet orifice for each chamber being near the bottom of the chamber and the outlet orifice being higher than the inlet, the inlet and outlet orifices being offset in relation to each other, the final outlet being linked to a collection zone and means being provided for causing a pressure drop from the feed inlet to the final outlet. The arrangement is such that liquid undergoing polymerization from a previous chamber passes substantially through the whole depth of liquid in each chamber, thereby causing agitation of the polymerizing mass. Additional agitation may be effected by bleeding an inert gas through the chambers. The product may be further polycondensed in the apparatus of Specification 823,100. In Fig. 1, three jacketed autoclaves 1, 2 and 3 connected in series by pipes 5 and 6 are arranged side by side, the bis-hydroxyalkyl terephthalate being fed to the apparatus through pipe 4 and polymethylene terephthalate being withdrawn through pipe 7 at which vacuum is applied. In Fig. 2, eight jacketed compartments are arranged one above the other, the bis-hydroxyalkyl <PICT:0829748/III/1> <PICT:0829748/III/2> terephthalate being fed to the apparatus through pipe 20 and polymethylene terephthalate being withdrawn through tube 28 at which vacuum is applied.ALSO:A polymethylene terephthalate is made by the continuous polycondensation of a bishydroxyalkyl terephthalate by passing the polymerizable liquid through a number of reaction zones in series, maintained under reduced pressure, and through which there is a pressure drop, characterized in that polymerizable liquid and the evolved vapours from a previous zone or zones pass through substantially the whole depth of liquid in each following zone, thereby causing agitation of the liquid, before passing to a successive zone or zones. The bis-hydroxyalkyl terephthalate may be in the form of a low polymer and may be admixed with a bishydroxyalkyl isophthalate. Additional agitation may be provided by bleeding in inert gas through the zones. The bis-hydroxyalkyl terephthalate <PICT:0829748/IV (a)/1> <PICT:0829748/IV (a)/2> may be polycondensed to an intrinsic viscosity of 0.1-0.5 and the product continuously polycondensed further by the process of Specification 823,100. A mixture of calcium acetate and antimony oxide may be used as catalyst. Temperatures of from 240-290 DEG C. may be used and may increase in successive compartments. In Fig. 1, the reaction zones comprise three jacketed autoclaves 1, 2 and 3 arranged side-by-side and connected in series by tubes 5 and 6. The bis-hydroxyalkyl terephthalate is fed to the apparatus through pipe 4 and polymethylene terephthalate withdrawn through pipe 7 at which a vacuum is applied. In Fig. 2, the reaction zones comprise eight jacketed compartments arranged one above the other and connected in series by tubes 21-27. The bis-hydroxyalkyl terephthalate is fed to the apparatus through tube 20 and polymethylene terephthalate withdrawn through tube 28 at which a vacuum is applied.
GB177957A 1957-01-17 1957-01-17 Production of polymeric polymethylene terephthalates Expired GB829748A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE564025D BE564025A (en) 1957-01-17
NL108873D NL108873C (en) 1957-01-17
GB177957A GB829748A (en) 1957-01-17 1957-01-17 Production of polymeric polymethylene terephthalates
FR1198446D FR1198446A (en) 1957-01-17 1958-01-17 Manufacture of highly polymerized polymethylene terephthalates
US7502A US3054776A (en) 1957-01-17 1960-01-08 Production of highly polymeric polymethylene terephthalates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB177957A GB829748A (en) 1957-01-17 1957-01-17 Production of polymeric polymethylene terephthalates

Publications (1)

Publication Number Publication Date
GB829748A true GB829748A (en) 1960-03-09

Family

ID=9727844

Family Applications (1)

Application Number Title Priority Date Filing Date
GB177957A Expired GB829748A (en) 1957-01-17 1957-01-17 Production of polymeric polymethylene terephthalates

Country Status (1)

Country Link
GB (1) GB829748A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211858A (en) * 1977-09-30 1980-07-08 Toray Industries, Inc. Method for preparing polyester
CN113244865A (en) * 2021-05-27 2021-08-13 浙江宝泽高分子材料有限公司 Preparation method of organic silicon softening agent and stainless steel reaction kettle for production of organic silicon softening agent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211858A (en) * 1977-09-30 1980-07-08 Toray Industries, Inc. Method for preparing polyester
CN113244865A (en) * 2021-05-27 2021-08-13 浙江宝泽高分子材料有限公司 Preparation method of organic silicon softening agent and stainless steel reaction kettle for production of organic silicon softening agent

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