EP1497020B1 - Procede et dispositif pour l'homogeneisation d'emulsions - Google Patents

Procede et dispositif pour l'homogeneisation d'emulsions Download PDF

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Publication number
EP1497020B1
EP1497020B1 EP03727282A EP03727282A EP1497020B1 EP 1497020 B1 EP1497020 B1 EP 1497020B1 EP 03727282 A EP03727282 A EP 03727282A EP 03727282 A EP03727282 A EP 03727282A EP 1497020 B1 EP1497020 B1 EP 1497020B1
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EP
European Patent Office
Prior art keywords
emulsion
shearing forces
sharp
less
milk
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
EP03727282A
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German (de)
English (en)
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EP1497020A1 (fr
Inventor
Wolfgang Ehrfeld
Andreas Fredenhagen
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.)
Ehrfeld Mikrotechnik BTS GmbH
Original Assignee
Ehrfeld Mikrotechnik BTS GmbH
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Publication of EP1497020A1 publication Critical patent/EP1497020A1/fr
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    • 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
    • B01F23/41—Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • 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
    • B01F33/30—Micromixers

Definitions

  • the invention relates to a method for homogenizing emulsions, in particular milk, with which it is possible to crush the fat droplets by a homogenizer equipped with special microstructures at a substantially lower operating pressure than has hitherto been possible.
  • Homogenizing is an essential process step for milk processing. In order to obtain a supernatant or weeks stable emulsion, the fat droplets contained in the milk must be small and evenly distributed. In addition, a more full-bodied taste is achieved by this fine distribution.
  • the homogenization of milk today is done exclusively with high-pressure homogenizers. In this process, the milk is conveyed through a narrow gap with very high pressure in a process that has been tried and tested over the past 100 years, thereby reducing the fat globules to sizes in the range of 0.3 to 0.4 ⁇ m.
  • the energy required to break up the fat droplets is three orders of magnitude higher than the theoretically necessary energy required to increase the surface area of the fat phase. Assuming a uniform energy input over the volume, the actual energy input is still two orders of magnitude above the theoretical minimum. Despite continuous improvement of the process, most of the energy stored in the milk only causes warming.
  • microtechnology has been used successfully in many areas of industry. Due to the small structural dimensions, high heat transfer rates, fast mixing processes and very precise flow guidance are achieved. In the food industry, the particular advantages of microtechnology for process improvements, in particular for the improvement of fluid processes, have hitherto hardly been used.
  • Microstructures for the treatment of liquid samples are in US-B-6,368,871 described. These structures make it possible to combine the most diverse material flows and the treatment of sensitive macromolecules (DNA, proteins, ).
  • the staggered flow obstacles formed as microstructures preferably have the shape of rhombuses, triangles, sickles or other sharp-edged structures.
  • the production can be carried out with standard production methods of microtechnology such. B. LIGA technique, deep etching, spark erosion, laser ablation or mechanical micro-machining done.
  • the structures can be positively, materially or non-positively connected, for example by diffusion soldering, diffusion welding, Etektronenstrahlsch routineen, gluing or pressing.
  • Another method to inexpensively produce structures with fine flow obstructions is to use thin metal wires with another metal layer, e.g. As a silver layer to coat galvanically, then pressed in parallel and to fix on a support plate, for example by welding. The outer metal layer is then removed again by an etching solution, so that the desired structure is formed.
  • the shear forces required to produce uniformly small droplets of fat in an emulsion can also be produced by differently designed microstructures. Particularly suitable for this purpose is a perforated plate proved, the holes have a diameter of less than 1 micron. This hole diameter is particularly suitable for the homogenization of milk, in which the fat droplets before the emulsion have a diameter of 3 to 25 microns and after passage through the homogenizer should have only a uniform droplet size of less than 1 micron. A comparable effect is also achieved by microchannels whose narrowest cross-section is smaller than 1 ⁇ m.
  • femtosecond lasers are of particular interest for producing the apertured plate which can be used in accordance with the invention for homogenizing emulsions, since in the processing of materials with high thermal conductivity and comparatively low melting temperature (for example metals) the melt adhesions which generally occur when conventional laser beam sources are used can not significantly reduce the achievable precision. Even transparent materials such as organic materials can be processed with very little damage with these femtosecond lasers.
  • Such a perforated plate is preferably made of metal or of glass.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Colloid Chemistry (AREA)
  • Dairy Products (AREA)

Claims (6)

  1. Procédé pour l'homogénéisation d'émulsions, l'émulsion étant soumise par un homogénéisateur équipé de microstructures à des forces de cisaillement élevées dans un champ d'écoulement, caractérisé en ce que ces forces de cisaillement sont générées par des obstacles à l'écoulement décalés les uns par rapport aux autres sous la forme de losanges, de triangles, de croissants ou d'autres structures à arêtes vives ou par une plaque perforée, dont les trous présentent un diamètre inférieur à 1 µm.
  2. Procédé selon la revendication 1, caractérisé en ce que les trous dans la plaque perforée sont générés par un laser femtoseconde.
  3. Procédé selon les revendications 1 et 2, caractérisé en ce que ce procédé est utilisé pour l'homogénéisation de lait, de sorte les gouttelettes de graisse de l'émulsion sont réduites à une grandeur inférieure à 1 µm.
  4. Procédé selon les revendications 1 à 3, caractérisé en ce que la pression de service se situe au-dessous de 50 bars.
  5. Dispositif pour l'homogénéisation de lait selon les revendications 1 à 4, caractérisé en ce qu'il contient une ou plusieurs plaques empilées les unes au-dessus des autres, microstructurées et à arêtes vives, qui exercent en tant qu'obstacles à l'écoulement des forces de cisaillement élevées sur le flux de liquide, les forces de cisaillement étant générées par des obstacles à l'écoulement décalés sous la forme de losanges, de triangles, de croissants ou d'autres structures à arêtes vives ou par des plaques perforées, dont les trous présentent un diamètre inférieur à 1 µm .
  6. Dispositif selon la revendication 5, caractérisé en ce qu'il présente une plaque perforée avec des microcanaux dont la section la plus étroite est inférieure à 1 µm.
EP03727282A 2002-04-17 2003-04-09 Procede et dispositif pour l'homogeneisation d'emulsions Expired - Lifetime EP1497020B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10216947A DE10216947B4 (de) 2002-04-17 2002-04-17 Verfahren zum Homogenisieren von Emulsionen
DE10216947 2002-04-17
PCT/EP2003/003657 WO2003086601A1 (fr) 2002-04-17 2003-04-09 Procede et dispositif pour l'homogeneisation d'emulsions

Publications (2)

Publication Number Publication Date
EP1497020A1 EP1497020A1 (fr) 2005-01-19
EP1497020B1 true EP1497020B1 (fr) 2007-08-15

Family

ID=28798475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03727282A Expired - Lifetime EP1497020B1 (fr) 2002-04-17 2003-04-09 Procede et dispositif pour l'homogeneisation d'emulsions

Country Status (6)

Country Link
US (1) US20050233040A1 (fr)
EP (1) EP1497020B1 (fr)
AT (1) ATE369907T1 (fr)
AU (1) AU2003233959A1 (fr)
DE (2) DE10216947B4 (fr)
WO (1) WO2003086601A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7118920B2 (en) * 2002-10-22 2006-10-10 Battelle Memorial Institute Multiphasic microchannel reactions
DE602004009681T2 (de) * 2003-05-16 2008-08-14 Velocys, Inc., Plain City Verfahren zur erzeugung einer emulsion durch verwendung einer mikrokanalverfahrentechnologie
US7485671B2 (en) * 2003-05-16 2009-02-03 Velocys, Inc. Process for forming an emulsion using microchannel process technology
EP1804964A1 (fr) 2004-10-01 2007-07-11 Velocys Inc. Procede de melange multiphase par technologie de traitement a micro-canaux
JP5704786B2 (ja) * 2004-11-16 2015-04-22 ヴェロシス，インク． マイクロチャネル技術を用いる多相反応プロセス
WO2014138154A1 (fr) * 2013-03-06 2014-09-12 President And Fellows Of Harvard College Dispositifs et procédés pour former des gouttelettes relativement monodispersées
EP2798988B1 (fr) * 2013-04-29 2016-05-18 Melitta Professional Coffee Solutions GmbH & Co., KG Dispositif de production d'une mousse de lait
DE202016105307U1 (de) 2016-09-23 2018-01-09 Reinz-Dichtungs-Gmbh Strömungsplatte für einen Befeuchter
DE202016105309U1 (de) 2016-09-23 2018-01-09 Reinz-Dichtungs-Gmbh Befeuchter
DE202016105311U1 (de) 2016-09-23 2018-01-09 Reinz-Dichtungs-Gmbh Strömungsplatte für einen Befeuchter
US20190321791A1 (en) * 2018-04-19 2019-10-24 President And Fellows Of Harvard College Apparatus and method for forming emulsions

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US368871A (en) * 1887-08-23 Double-shovel plow
US2132854A (en) * 1937-07-16 1938-10-11 John Duval Dodge Emulsifier
DE3709278A1 (de) * 1987-03-20 1988-09-29 Kernforschungsz Karlsruhe Verfahren zur herstellung von feinstrukturkoerpern
NL1001380C2 (nl) * 1995-10-09 1997-04-11 Fuji Photo Film Bv Methode voor het dispergeren van een geëmulgeerd materiaal van het olie-druppeltype in een vloeistoftoevoersysteem en bekledingsmethode waarbij van een dergelijke dispergeermethode gebruik wordt gemaakt.
DE19541266A1 (de) * 1995-11-06 1997-05-07 Bayer Ag Verfahren und Vorrichtung zur Durchführung chemischer Reaktionen mittels eines Mikrostruktur-Lamellenmischers
DE19700810A1 (de) * 1997-01-13 1998-07-16 Bayer Ag Verfahren und Vorrichtung zum Homogenisieren von Milch
US6208458B1 (en) * 1997-03-21 2001-03-27 Imra America, Inc. Quasi-phase-matched parametric chirped pulse amplification systems
US6368871B1 (en) * 1997-08-13 2002-04-09 Cepheid Non-planar microstructures for manipulation of fluid samples
JP4209589B2 (ja) * 1997-12-24 2009-01-14 シーフィード 一体型流体操作カートリッジ
DE19927556C2 (de) * 1999-06-16 2003-05-08 Inst Mikrotechnik Mainz Gmbh Statischer Mikromischer und Verfahren zum statischen Mischen zweier oder mehrerer Edukte
DE10059430A1 (de) * 2000-11-30 2002-06-06 Cognis Deutschland Gmbh Feinteilige Emulsionen

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
AU2003233959A1 (en) 2003-10-27
US20050233040A1 (en) 2005-10-20
WO2003086601A1 (fr) 2003-10-23
ATE369907T1 (de) 2007-09-15
DE10216947A1 (de) 2003-11-06
DE50307961D1 (de) 2007-09-27
EP1497020A1 (fr) 2005-01-19
DE10216947B4 (de) 2007-10-04

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