FR2020733A1 - Heat exchanger modification to improve fluidised bed - polymerisation of polyester prepolymer particles - Google Patents

Heat exchanger modification to improve fluidised bed - polymerisation of polyester prepolymer particles

Info

Publication number
FR2020733A1
FR2020733A1 FR6935106A FR6935106A FR2020733A1 FR 2020733 A1 FR2020733 A1 FR 2020733A1 FR 6935106 A FR6935106 A FR 6935106A FR 6935106 A FR6935106 A FR 6935106A FR 2020733 A1 FR2020733 A1 FR 2020733A1
Authority
FR
France
Prior art keywords
particles
polymerisation
fluidised bed
polyester prepolymer
heat exchanger
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.)
Withdrawn
Application number
FR6935106A
Other languages
French (fr)
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of FR2020733A1 publication Critical patent/FR2020733A1/en
Withdrawn legal-status Critical Current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
    • C08G63/80—Solid-state polycondensation
    • 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
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1836—Heating and cooling the reactor
    • 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
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00115—Controlling the temperature by indirect heat exchange with heat exchange elements inside the bed of solid particles
    • B01J2208/00132—Tubes
    • 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
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00265—Part of all of the reactants being heated or cooled outside the reactor while recycling
    • B01J2208/00274—Part of all of the reactants being heated or cooled outside the reactor while recycling involving reactant vapours
    • 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
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00477—Controlling the temperature by thermal insulation means
    • B01J2208/00495—Controlling the temperature by thermal insulation means using insulating materials or refractories

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

The solid state polymerisation of polyester prepolymer particles is carried out by heating the particles in fluidised bed conditions using heat exchangers whose surfaces are coated with a thin layer of polytetrafluoroethylene. The temperature is sufficiently high for polymerisation to take place but is below the melting point of the particles. The polytetrafluoroethylene coating improves the fluidisation conditions and in particular the transfer of heat. Uniform conditions are established. Specifically the polymer is polyethylene terephthalate and the temperature is between 200 and 300 degrees C and is 5 to 80 degrees C below the melting point of the particles. The polymer produced has a molecular weight of at least 15,000 and possibly of about 100,000 or higher; the intrinsic viscosity is higher than 0.50.
FR6935106A 1968-10-15 1969-10-14 Heat exchanger modification to improve fluidised bed - polymerisation of polyester prepolymer particles Withdrawn FR2020733A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76778868A 1968-10-15 1968-10-15

Publications (1)

Publication Number Publication Date
FR2020733A1 true FR2020733A1 (en) 1970-07-17

Family

ID=25080585

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6935106A Withdrawn FR2020733A1 (en) 1968-10-15 1969-10-14 Heat exchanger modification to improve fluidised bed - polymerisation of polyester prepolymer particles

Country Status (2)

Country Link
BE (1) BE740227A (en)
FR (1) FR2020733A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463157A1 (en) * 1978-03-13 1981-02-20 Owens Illinois Inc PROCESS FOR PRODUCING IMPROVED AND STABLE POLYETHYLENE TEREPHTHALATE
EP0712703A3 (en) * 1994-11-21 1996-12-27 Sinco Eng Spa Process for the crystallization of polyester resins

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463157A1 (en) * 1978-03-13 1981-02-20 Owens Illinois Inc PROCESS FOR PRODUCING IMPROVED AND STABLE POLYETHYLENE TEREPHTHALATE
EP0712703A3 (en) * 1994-11-21 1996-12-27 Sinco Eng Spa Process for the crystallization of polyester resins
US5714571A (en) * 1994-11-21 1998-02-03 Sinco Engineering S.P.A. Process for the crystallization of polyester resins
AU688978B2 (en) * 1994-11-21 1998-03-19 Uop N.V. Process for the crystallization of polyester resins
CN1071343C (en) * 1994-11-21 2001-09-19 辛科工程股份公司 Process for crystallization of polyester resins

Also Published As

Publication number Publication date
BE740227A (en) 1970-03-16

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Legal Events

Date Code Title Description
ST Notification of lapse