EP1127609B1 - Procédé pour le traitement d'un produit dans au moins un mélangeur-pétrisseur - Google Patents

Procédé pour le traitement d'un produit dans au moins un mélangeur-pétrisseur Download PDF

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Publication number
EP1127609B1
EP1127609B1 EP01103153A EP01103153A EP1127609B1 EP 1127609 B1 EP1127609 B1 EP 1127609B1 EP 01103153 A EP01103153 A EP 01103153A EP 01103153 A EP01103153 A EP 01103153A EP 1127609 B1 EP1127609 B1 EP 1127609B1
Authority
EP
European Patent Office
Prior art keywords
product
mixing
kneader
mixing kneader
solvent
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 - Lifetime
Application number
EP01103153A
Other languages
German (de)
English (en)
Other versions
EP1127609A2 (fr
EP1127609A3 (fr
Inventor
Pierre-Alain Dr. Fleury
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.)
List AG
Original Assignee
List AG
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 List AG filed Critical List AG
Publication of EP1127609A2 publication Critical patent/EP1127609A2/fr
Publication of EP1127609A3 publication Critical patent/EP1127609A3/fr
Application granted granted Critical
Publication of EP1127609B1 publication Critical patent/EP1127609B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/47—Mixing liquids with liquids; Emulsifying involving high-viscosity liquids, e.g. asphalt
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/834—Mixing in several steps, e.g. successive steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2214—Speed during the operation
    • B01F35/22142—Speed of the mixing device during the operation
    • B01F35/221422—Speed of rotation of the mixing axis, stirrer or receptacle during the operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B01F35/75455—Discharge mechanisms characterised by the means for discharging the components from the mixer using a rotary discharge means, e.g. a screw beneath the receptacle
    • B01F35/754551—Discharge mechanisms characterised by the means for discharging the components from the mixer using a rotary discharge means, e.g. a screw beneath the receptacle using helical screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners

Definitions

  • the invention relates to a process for the continuous evaporation or thermal treatment of viscous products, in particular elastomers and thermoplastics, in a mixing kneader with at least one stirrer shaft equipped with mixing or kneading elements.
  • the corresponding separation processes are usually carried out in stirred heat exchangers and so-called mixing kneaders in which the product is transported by appropriate kneading and transport elements from an inlet to an outlet and at the same time brought into intensive contact with the heat exchange surfaces.
  • mixing kneaders are described, for example, in DE-PS 23 49 106, EP 0 517 068 A1 and DE 195 36 944 A1.
  • the present invention has for its object to optimize the heat transfer limited portion of the evaporation.
  • the solvent by energy input consisting of mechanical kneading energy and heat transfer via the contact with the kneader heat exchange surface is evaporated to near the breaking point of the evaporation rate and in the so pre-evaporated viscous product bed continuously new low-viscosity product solution is mixed in such a way that the evaporation rate remains above the breaking point.
  • a mixing kneader which has a good backmixing.
  • This is preferably a so-called LIST-DTB mixer, which is also shown in the above-mentioned DE-PS 23 49 106.
  • LIST-DTB mixer which is also shown in the above-mentioned DE-PS 23 49 106.
  • the product is not only transported from the inlet to the outlet, but also homogeneously mixed again by backmixing with a new product throughout the apparatus.
  • the evaporation takes place essentially via the heat of contact, which comes from a heated housing jacket, a heated shaft and / or heated kneading counterparts.
  • the more viscous the product is by evaporation the more the contact heat transfer decreases and the more shear heat is added, with the sum of both going through a maximum. From a certain reduction of the percentage of liquid components, however, the evaporation rate decreases considerably, since not enough solvent can be replenished from Gutsinneren to the surface.
  • the constituent is to be kept at, for example, a solvent in a percentage range which, close to the maximum, is necessarily above this break-in point of the evaporation rate.
  • the inventive method also has the advantage that at the increased work intensity foaming, which results from the flash metering of the product in the mixing kneader, is broken, whereby the heat energy input is further improved.
  • the evaporation energy required for evaporation is accordingly maximized by the combination of contact heat and shear heat.
  • the possibility of keeping the product temperature constant through the evaporation of solvent allows a high degree of freedom with regard to the regulation of the shear heat via the speed (shear rate) and the degree of filling of the mixing kneader.
  • the product is subjected to a plug flow by a corresponding geometry of the kneading elements.
  • the material transfer limited evaporation takes place, which is why preferably two-shaft mixing kneaders are used, which are commercially available under the name LIST-ORP (EP 0 517 068 A1) and LIST-CRP (DE 195 36 944 A1).
  • LIST-ORP EP 0 517 068 A1
  • LIST-CRP DE 195 36 944 A1
  • the mixing kneader 1 is a kneader with a good back-mixing, as it is, for example, on the market under the name LIST-DTB.
  • DE-PS 23 49 106 refers to this DTB.
  • a mixing kneader with good back-mixing is characterized in that the product is homogeneously mixed with one another throughout the mixing kneader.
  • the mixing kneader 2 is a kneader with a so-called plug flow, as it is, for example, on the market under the name LIST-CRP or LIST-ORP.
  • the corresponding industrial property rights are published in EP 0 517 068 and DE 195 36 944 A1.
  • a mixing kneader with good plug flow the product is transported from the inlet to the outlet without axial mixing with the subsequent product. Therefore, there is usually an inlet 3 for the product at one end of the mixing kneader and an outlet 4, which in the present case is designed as a discharge twin screw, at the other end of the mixing kneader 2.
  • the mixing kneader 1 has an inlet 5 approximately in the middle of the mixing kneader and a discharge twin screw 6 at the end of the mixing kneader 1.
  • both mixing kneaders are each two shafts 7 and 8 or 9 and 10 indicated, in which mixing, transport or Kneading elements 11 are arranged, which rotate with the waves, as in the above-mentioned Protected rights is described.
  • a pump 13 In a supply line 12 to the inlet 5, a pump 13, a heat exchanger 14 and a pressure-holding valve 15 is turned on.
  • This device referred to as a flash device, heats the product.
  • the mixing kneader 1 a large part of the liquid component of the product is evaporated, wherein the mixing kneader 1 heat is supplied.
  • a housing shell 16 the kneader shafts 7 and 8 and the kneading elements 11 are heated.
  • the evaporated component leaves the mixing kneader 1 via a Brüdendom 17, wherein in a corresponding derivative 18, a capacitor 19 and an inert gas pump 20 are turned on.
  • FIG. 2 shows that the mixing kneader 1 can also have only one shaft 21.
  • the largely freed of the liquid component product is discharged from the mixing kneader 1 through the discharge double screw 6 and fed via a line 22 and a pressure-maintaining valve 23 to the inlet 3 of the mixing kneader 2. Also, this mixing kneader 2 has a Brüdendom 24, which merges into a derivative 25, in which a capacitor 26 and an inert gas pump 27 are turned on.
  • cyclohexane for example, an elastomer, namely styrene-butadiene-styrene (SBS), dissolved.
  • SBS styrene-butadiene-styrene
  • the kneading energy increases considerably as a result of the increasing viscosity of the product (up to 1300 Pas at 80 s -1 shear rate), without the contact heat transfer significantly decreasing. This means that a considerable amount of shear heat is added to the contact heat. At the same time, however, the solvent concentration is still high enough so that the entire energy input for the evaporation of the solvent can be used, so that the product temperature remains constant. This maximizes the effectiveness of the kneader in this area.
  • this product behavior is utilized in the mixing kneader 1 with good back-mixing by keeping the concentration of the solvent always at about 25% cyclohexane. This is done by controlling the feed amount of fresh product and by regulating the kneading energy by means of the shaft speed and the degree of filling.
  • the thus evaporated solution is discharged continuously by means of the discharge double screw 6 from the mixing kneader 1, simultaneously heated by shearing in the screw and flashed into the mixing kneader 2.
  • a substance transfer limited drying section is performed in which substantially no surface evaporation takes place.
  • the evaporation points whose entirety represents the so-called drying mirror, withdraw more and more into the interior of the interior. The liquid must diffuse.
  • the mixing kneader 2 is equipped with maximum surface renewal, plug flow and good product temperature control capability for this process section.
  • the degassed elastomer is discharged from the mixing kneader 2 at the end with the second discharge twin screw 4.
  • the elastomer still contains a residual solvent content below 1000 ppm.
  • Position Number List 1 mixing kneader 34 67 2 mixing kneader 35 68 3 inlet 36 69 4 Austragdoppelschnecke 37 70 5 inlet 38 71 6 Austragdoppelschnecke 39 72 7 waves 40 73 8th waves 41 74 9 waves 42 75 10 waves 43 76 11 kneading 44 77 12 supply 45 78 13 pump 46 79 14 heat exchangers 47 15
  • Pressure holding valve 48 16 housing jacket 49 17 vapor dome 50 18 derivation 51 19 capacitor 52 20 pump 53 21 wave 54 22 management 55 23 Pressure holding valve 56 24 vapor dome 57 25 derivation 58 26 capacitor 59 27 pump 60 28 61 29 62 30 63 31 64 32 65 33 66

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (8)

  1. Procédé pour le traitement thermique en continu de produits très visqueux contenant du solvant, en particulier d'élastomères et de thermoplastiques, dans des mélangeurs-pétrisseurs (1, 2) avec au moins un arbre d'agitation (7 à 10, 31) équipé d'éléments de mélange ou de pétrissage, dans un mélangeur-pétrisseur (1) étant évaporé le solvant par apport d'énergie composée d'énergie de pétrissage mécanique et de transfert de chaleur par le contact avec la surface d'échange de chaleur du pétrisseur jusqu'à peu près au-dessus du point de rupture de la vitesse d'évaporation et au lit de produit visqueux ainsi préévaporé étant mélangée en continu une nouvelle solution de produit peu visqueuse de sorte que la vitesse d'évaporation reste au-dessus du point de rupture.
  2. Procédé selon la revendication 1, caractérisé par le fait qu'une énergie de pétrissage est influencée par une variation du nombre de tours et/ou du degré de remplissage du mélangeur-pétrisseur (1).
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que le produit dans le mélangeur-pétrisseur (1) est rétromélangé en continu.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé par le fait que le produit est sorti en continu du mélangeur-pétrisseur (1) et introduit dans un deuxième mélangeur-pétrisseur (2).
  5. Procédé selon la revendication 5, caractérisé par le fait que le produit est chauffé lors de la sortie du mélangeur-pétrisseur (1), avant qu'il n'arrive dans le mélangeur-pétrisseur (2).
  6. Procédé selon la revendication 4 ou 5, caractérisé par le fait que le produit est soumis, dans le deuxième mélangeur-pétrisseur (2), à un écoulement à bouchons.
  7. Procédé selon la revendication 6, caractérisé par le fait que le produit est soumis, dans le deuxième mélangeur-pétrisseur (2), à un grand renouvellement de surface ainsi qu'à un contrôle de bonne température de produit.
  8. Procédé selon au moins l'une des revendications 1 à 7, caractérisé par le fait que comme produit est traitée une solution d'élastomère contenant un solvant.
EP01103153A 2000-02-24 2001-02-10 Procédé pour le traitement d'un produit dans au moins un mélangeur-pétrisseur Expired - Lifetime EP1127609B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10008531A DE10008531A1 (de) 2000-02-24 2000-02-24 Verfahren zum Behandeln eines Produktes in zumindest einem Mischkneter
DE10008531 2000-02-24

Publications (3)

Publication Number Publication Date
EP1127609A2 EP1127609A2 (fr) 2001-08-29
EP1127609A3 EP1127609A3 (fr) 2005-06-08
EP1127609B1 true EP1127609B1 (fr) 2007-04-11

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EP01103153A Expired - Lifetime EP1127609B1 (fr) 2000-02-24 2001-02-10 Procédé pour le traitement d'un produit dans au moins un mélangeur-pétrisseur

Country Status (4)

Country Link
EP (1) EP1127609B1 (fr)
AT (1) ATE359113T1 (fr)
DE (2) DE10008531A1 (fr)
ES (1) ES2281382T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010052265A1 (de) 2010-02-16 2011-08-18 LANXESS Deutschland GmbH, 51373 Verfahren zur Abtrennung von Polybutadien-Kautschuk

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ES2328458T3 (es) * 2002-11-08 2009-11-13 Buss-Sms-Canzler Gmbh Procedimiento para mezclar componentes solidos y liquidos en un dispositivo mezclador, aplicacion del procedimiento y dispositivo mezclador.
DE10303167B4 (de) * 2003-01-27 2006-01-12 List Holding Ag Verfahren zur kontinuierlichen Phasenumwandlung eines Produktes
DE102006015541A1 (de) * 2006-03-31 2007-10-04 List Holding Ag Verfahren und Vorrichtung zur Behandlung von zähviskosen Produkten
CN102171250B (zh) 2008-09-19 2014-10-22 朗盛国际股份公司 不含水及溶剂的聚合物的生产方法
PL2774665T3 (pl) * 2009-02-05 2017-09-29 List Technology Ag Sposób obróbki roztworów polimerów metodą ciągłą
FR2951177B1 (fr) 2009-10-09 2012-12-21 Roquette Freres Procede de preparation de derives acetyles de matiere amylacee
EP2368918A1 (fr) 2010-03-24 2011-09-28 LANXESS Deutschland GmbH Processus pour la fabrication de polymères sans eau et sans solvant
MY160881A (en) 2010-03-24 2017-03-31 Arlanxeo Deutschland Gmbh Process for the production of water and solvent-free polymers
RU2596824C2 (ru) 2010-03-24 2016-09-10 Ланксесс Интернасьональ Са Способ производства галобутиловых каучуков, не содержащих воду и растворитель
EP2368917B1 (fr) 2010-03-25 2013-01-09 LANXESS International SA Processus pour la production d'eau et de caoutchoucs de nitrile hydrogéné sans solvant
EP2368916B1 (fr) 2010-03-25 2012-08-22 LANXESS International SA Processus pour la production d'eau et de caoutchoucs de nitrile sans solvant
US8524859B2 (en) 2010-04-30 2013-09-03 Exxonmobil Chemical Patents Inc. Method for elastomer finishing
SA112330882B1 (ar) 2011-09-28 2018-01-24 ارلانكسيو دوتشلاند جى ام بى اتش. جهاز لإزالة مكونات متطايرة من وسط يحتوي على بوليمر
DE102013102570A1 (de) * 2013-03-13 2014-09-18 List Holding Ag Verfahren zur Aufkonzentration einer Polymerlösung
TWI649180B (zh) 2013-04-04 2019-02-01 艾朗希歐德意志有限公司 用於自含彈性體媒介移除揮發性組份之方法及為此目的之去揮發物設備
KR102532868B1 (ko) * 2014-11-17 2023-05-15 리스트 테크놀로지 아게 잔류물, 특히 정유공정에서의 잔류물의 처리 및/또는 회수 및/또는 재사용 방법
CN107548343B (zh) * 2015-04-30 2020-06-09 埃克森美孚化学专利公司 在本体相中用于卤化烯烃衍生的弹性体的系统与方法
CN110813170A (zh) * 2019-08-20 2020-02-21 浙江盛旺耐火材料股份有限公司 一种耐火浇注料用逆流式混合机
DE102021100480A1 (de) * 2021-01-13 2022-07-14 List Technology Ag Mischkneter zur Verarbeitung eines Transfergemisches zu einer Formlösung nach dem Direktlöseverfahren

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Publication number Priority date Publication date Assignee Title
DE102010052265A1 (de) 2010-02-16 2011-08-18 LANXESS Deutschland GmbH, 51373 Verfahren zur Abtrennung von Polybutadien-Kautschuk

Also Published As

Publication number Publication date
EP1127609A2 (fr) 2001-08-29
ES2281382T3 (es) 2007-10-01
DE10008531A1 (de) 2001-09-13
DE50112304D1 (de) 2007-05-24
EP1127609A3 (fr) 2005-06-08
ATE359113T1 (de) 2007-05-15

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