EP0853492A1 - Procede permettant le passage en continu de fluides a haute viscosite lors de la production de produits de polycondensation et pour l'introduction de gaz, l'elimination de gaz dans des fluides a haute viscosite ou la vaporisation desdits fluides - Google Patents

Procede permettant le passage en continu de fluides a haute viscosite lors de la production de produits de polycondensation et pour l'introduction de gaz, l'elimination de gaz dans des fluides a haute viscosite ou la vaporisation desdits fluides

Info

Publication number
EP0853492A1
EP0853492A1 EP96931818A EP96931818A EP0853492A1 EP 0853492 A1 EP0853492 A1 EP 0853492A1 EP 96931818 A EP96931818 A EP 96931818A EP 96931818 A EP96931818 A EP 96931818A EP 0853492 A1 EP0853492 A1 EP 0853492A1
Authority
EP
European Patent Office
Prior art keywords
container
highly viscous
viscous fluids
cylindrical
melt
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Withdrawn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
EP96931818A
Other languages
German (de)
English (en)
Inventor
Friedrich Rebelein
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.)
Hoechst Trevira GmbH and Co KG
Original Assignee
Hoechst Trevira GmbH and Co KG
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 Hoechst Trevira GmbH and Co KG filed Critical Hoechst Trevira GmbH and Co KG
Publication of EP0853492A1 publication Critical patent/EP0853492A1/fr
Withdrawn legal-status Critical Current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
    • C08G63/785—Preparation processes characterised by the apparatus used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/94—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with rotary cylinders or cones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/84—Venting or degassing ; Removing liquids, e.g. by evaporating components
    • B29B7/845—Venting, degassing or removing evaporated components in devices with rotary stirrers

Definitions

  • the invention relates to a device in particular for treating melts in the production of polycondensates, comprising a cylindrical or columnar or conical container, at least one cylindrical or columnar or conical stirring element which is rotatably arranged in the container in close proximity to the container wall.
  • an apparatus which comprises a thin film polymerization tank, at least one columnar or cylindrical, roller-shaped impeller which rotates along a substantially cylindrical, vertical tank wall and in close proximity thereof, and, in the upper part of the tank, a planetary gear in order to drive the impeller, with the propeller being mounted on the fly.
  • a polyester-forming monomer and / or an oligomer thereof in the form of a thin film is dropped onto the inner surface of the tank wall at elevated temperature.
  • the agitator blade is moved epicyclically along the tank wall and in the circumferential direction thereof. The monomer begins to polymerize and the resulting polymer melt is withdrawn from the polymerization tank after a certain time, which corresponds to the desired degree of polymerization (cf. also DE 1 495 665).
  • the known device has the disadvantages that, due to the flying mounting of the agitator blades, the distance of the agitator blade to the tank wall from top to bottom must be greater, resulting in an uneven layer thickness the melt leads.
  • the reactor is also not suitable for the treatment of highly viscous melts, because this would bend the mixing paddle towards the middle of the tank. Thin films can then no longer be produced and the apparatus would also be damaged.
  • the invention seeks to remedy this.
  • this is done by a device of the type mentioned at the outset, which is characterized in that at least one of the stirring elements is mounted on both sides.
  • the invention thus relates to a device for treating melts, in particular in the production of polycondensates, comprising a cylindrical or columnar or conical container, at least one cylindrical or columnar or conical stirring element which is rotatably arranged in the container in close proximity to the container wall, characterized in that at least one of the stirring elements is mounted on both sides.
  • Preferred refinements of the device according to the invention result from claims 2 to 4.
  • Individual or more of the individual features mentioned in the refinements can each represent independent solutions according to the invention, and the individual features can also be combined as desired.
  • the advantage of the invention can be seen essentially in the fact that deflection of the rolls is prevented and that highly viscous melts can thereby be treated.
  • the device is particularly suitable for the treatment of highly viscous fluids, in particular for carrying out processes for the production of polycondensates, in particular polyester (PET), by means of melt polymerization, the viscosities also from melts up to 2000 Pas, still thin films can be produced.
  • PET polyester
  • the device according to the invention it is possible to carry out the polymerization process in such a way that almost the entire surfaces inside the container are continuously rewetted with melt.
  • one or both bearings can rotate partially or completely in the melt.
  • the device can be operated vertically, inclined or lying.
  • Containers and scrambled elements can preferably be cylindrical, conical or barrel-shaped. Cylindrical rollers are particularly suitable as stirring elements. The surfaces of the stirring elements can be smooth or structured, for example in order to move the melt to the outlet of the container with spiral grooves.
  • rollers rotating around the container can be supported by a central roller, similar to the sun gear of a planetary gear. This results in a harmonious movement with constantly newly wetted surfaces.
  • the rollers can be dragged along and driven by the friction between the inner cylinder wall and the outer cylinder roller wall. It is also possible to drive the rollers from the outside or by sprockets with more effort, so that they run ahead or run after.
  • the vapors can be removed or fumigation media can be added.
  • the melt moves in the container due to the melt level and / or due to the inclination of the entire device to exit, for example on the end of the container opposite the melt inlet.
  • All moving and stationary parts of the apparatus inside the container can be continuously flushed with fluid so that no deposits are formed.
  • the device can be erected with a diameter of up to 2.5 or 3 m and a length of up to 7.5 m.
  • the device can e.g. at the melting range of polyester (PET), between 250 and 300 ° C and a vacuum of a few millibars or less or with overpressure compared to the environment.
  • PET polyester
  • the device can e.g. at the melting range of polyester (PET), between 250 and 300 ° C and a vacuum of a few millibars or less or with overpressure compared to the environment.
  • Figure 1 an embodiment of the device according to the invention in the axial
  • Sectional view Figure 2 a cross section along the plane shown in Figure 1.
  • melt is introduced through an inlet 3.
  • the melt is evenly distributed on the inner wall of the container 1 and on the outer wall of the cylindrical rollers 4, 5 in that the cylindrical rollers 5 roll on the longitudinal inner wall of the container 1.
  • the cylindrical roller package 4, 5 is provided with bearing elements 6 on both sides. It can also be driven on both sides via these bearing elements 6.
  • the melt In the operating state, the melt is rolled out as a film on which is constantly form new surfaces. This facilitates gas delivery or absorption from or into the melt.
  • the melt is also thoroughly mixed and rolled over by the movement of the cylindrical roller 4, 5. These processes are repeated cyclically, according to the given geometry.
  • the central roller 4 on the one hand supports the outer rollers 5, and on the other hand it creates an additional surface for the melt.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention a pour objet un dispositif pour le traitement de matières en fusion, en particulier lors de la production de polycondensats, ledit dispositif comprenant un récipient cylindrique ou en forme de colonne ou conique, au moins un élément agitateur cylindrique ou en forme de colonne ou conique, monté rotatif dans le récipient, à faible distance des parois de ce récipient. Ce dispositif est caractérisé en ce qu'au moins l'un des éléments agitateurs est monté des deux côtés.
EP96931818A 1995-10-02 1996-09-20 Procede permettant le passage en continu de fluides a haute viscosite lors de la production de produits de polycondensation et pour l'introduction de gaz, l'elimination de gaz dans des fluides a haute viscosite ou la vaporisation desdits fluides Withdrawn EP0853492A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19536790A DE19536790A1 (de) 1995-10-02 1995-10-02 Vorrichtung zum kontinuierlichen Durchsatz von hochviskosen Fluiden bei der Herstellung von Polykondensationsprodukten und zum Begasen, Entgasen oder Verdampfen von hochviskosen Fluiden
DE19536790 1995-10-02
PCT/EP1996/004118 WO1997012667A1 (fr) 1995-10-02 1996-09-20 Procede permettant le passage en continu de fluides a haute viscosite lors de la production de produits de polycondensation et pour l'introduction de gaz, l'elimination de gaz dans des fluides a haute viscosite ou la vaporisation desdits fluides

Publications (1)

Publication Number Publication Date
EP0853492A1 true EP0853492A1 (fr) 1998-07-22

Family

ID=7773895

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96931818A Withdrawn EP0853492A1 (fr) 1995-10-02 1996-09-20 Procede permettant le passage en continu de fluides a haute viscosite lors de la production de produits de polycondensation et pour l'introduction de gaz, l'elimination de gaz dans des fluides a haute viscosite ou la vaporisation desdits fluides

Country Status (6)

Country Link
EP (1) EP0853492A1 (fr)
JP (1) JPH11513301A (fr)
AU (1) AU7085896A (fr)
DE (1) DE19536790A1 (fr)
TW (1) TW366305B (fr)
WO (1) WO1997012667A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8679231B2 (en) 2011-01-19 2014-03-25 Advanced Technology Materials, Inc. PVDF pyrolyzate adsorbent and gas storage and dispensing system utilizing same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL126771C (fr) * 1965-02-01
DE2132884A1 (de) * 1971-07-01 1973-01-11 Yoshio Terauchi Knet- und/oder mischmaschine
US3797550A (en) * 1971-08-16 1974-03-19 Monsanto Co Wiped film devolatilizer construction
DE3513536C1 (fr) * 1985-04-16 1987-01-02 Rudolf Paul 7000 Stuttgart De Fritsch
ATA105393A (de) * 1993-06-01 1998-03-15 Blach Josef Alois Mischer für viskose flüssigkeiten und massen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9712667A1 *

Also Published As

Publication number Publication date
WO1997012667A1 (fr) 1997-04-10
AU7085896A (en) 1997-04-28
DE19536790A1 (de) 1997-04-03
TW366305B (en) 1999-08-11
JPH11513301A (ja) 1999-11-16

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