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EP2007510A1 - Procédé en continu pour conduire une réaction chimique dans laquelle une phase gazeuse est ajoutée à un flux de départ contenant une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau - Google Patents

Procédé en continu pour conduire une réaction chimique dans laquelle une phase gazeuse est ajoutée à un flux de départ contenant une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau

Info

Publication number
EP2007510A1
EP2007510A1 EP07727671A EP07727671A EP2007510A1 EP 2007510 A1 EP2007510 A1 EP 2007510A1 EP 07727671 A EP07727671 A EP 07727671A EP 07727671 A EP07727671 A EP 07727671A EP 2007510 A1 EP2007510 A1 EP 2007510A1
Authority
EP
European Patent Office
Prior art keywords
rotor
zone
stator
shear
gaseous phase
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Withdrawn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
EP07727671A
Other languages
German (de)
English (en)
Inventor
Wolfgang Fischer
Rainer Bardon
Chris Dearmitt
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to EP07727671A priority Critical patent/EP2007510A1/fr
Publication of EP2007510A1 publication Critical patent/EP2007510A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B01J19/18—Stationary reactors having moving elements inside
    • B01J19/1806—Stationary reactors having moving elements inside resulting in a turbulent flow of the reactants, such as in centrifugal-type reactors, or having a high Reynolds-number
    • 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2713—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator the surfaces having a conical shape
    • 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2714—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator the relative position of the stator and the rotor, gap in between or gap with the walls being adjustable
    • 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
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • 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
    • B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
    • B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F5/00—Compounds of magnesium
    • C01F5/24—Magnesium carbonates

Definitions

  • a continuous process for carrying out a chemical reaction in which a gaseous phase is added to a feed stream containing one or more solid phases dissolved or dispersed in water
  • the invention relates to a continuous process for carrying out a chemical reaction in which a gaseous phase is added to a feed stream containing one or more solid phases dissolved or dispersed in water.
  • the object is achieved by a continuous process for carrying out a chemical reaction in which a gaseous phase is added to a feed stream containing one or more solid phases dissolved or dispersed in water, which is characterized in that a rotor / stator device is used, with a rotor and a stator, which form with their mutually facing surfaces a shear zone, which adjoins a mixing zone with an opening of the mixing zone to the outside, wherein the shear zone upstream of a feed and the mixing zone Downstream of the outlet, the feed stream containing one or more solid phases dissolved or dispersed in water is added to the rotor / stator device via the feed into the shear zone, in which the shear zone an overpressure of at least 1 bar is built up, in the mixing zone through the opening to the outside, the gaseous phase is mixed into the feed stream under the built-up in the shear zone pressure of at least 1 bar or with further pressure increase, to obtain a reaction mixture which is fed via the outlet of a residence time zone in which the
  • the feed stream containing one or more solid phases dissolved or dispersed in water is brought to an overpressure of at least 1 bar and submerged in a subsequent mixing zone the previously established in the shear zone pressure or with further pressure increase, a gaseous phase can be added, wherein the solubility of the gas in the liquid phase is significantly increased, excellent mixing and short reaction times can be achieved.
  • a rotor / stator device can be used, as described for dispersing, distributing and homogenizing in DE 197 20 959 and known under the name Supraton®: rotor and stator form a conical shear gap between the mutually associated surfaces, whose width can be adjusted by the axial displacement of the rotor and / or stator and to which an annular space adjoins.
  • the device has an axial feed port for the supply of the mixture to be treated to the shear gap and a radial outlet port for the discharge of the same from the annulus.
  • This rotor / stator device is advantageously used for the preparation of mixtures starting from an aqueous, one or more solid phases, containing phase and a gaseous phase by using as feed for the aqueous phase containing one or more solid phases of the axial feed nozzle and as a supply for the gaseous phase, the opening of the annular space around the rotor and the stator, which is provided as an emptying nozzle, is used to the outside.
  • the annular space is a homogeneous mixing of the gaseous phase in the one or more solid phases containing aqueous phase under an overpressure of at least 1 bar.
  • the feed stream containing one or more solid phases dissolved or dispersed in water, can advantageously be supplied via a powder attachment on the inlet side of the rotor / stator apparatus, as is available, for example, under the name Vortex® from Buckau-Wolf, be supplied to the axial feed nozzle.
  • the optimum mixing of the gaseous phase into the feed stream containing one or more solid phases dissolved or dispersed in water takes place in that the material leaving the shear gap is thrown by the centrifugal forces into the annular space into which the gas to be admixed is metered.
  • the desired Ü- pressure in the annulus is adjusted, whereby the solubility of the gas in the liquid phase is significantly increased and thus short reaction times can be achieved.
  • the reaction mixture from the feed stream and the gaseous phase leaves the rotor / stator device via the radial outlet port and enters a residence time zone in which the chemical reaction takes place and the pressure regulating valve is connected downstream.
  • the rotor / stator device in which in the feed stream, containing one or more solid, dissolved or dispersed in water phases, an overpressure of at least 1 bar is built, a tool containing, preferably on the rotor and / or the stator each having a sprocket, wherein between the facing sprockets through the gaps between the teeth of the sprockets, the shear zone is formed.
  • a tool containing, preferably on the rotor and / or the stator each having a sprocket, wherein between the facing sprockets through the gaps between the teeth of the sprockets, the shear zone is formed.
  • homogeneous mixing of the gaseous phase into the aqueous phase containing one or more solid phases takes place under an overpressure of at least 1 bar.
  • a propeller system with a stator and a rotor with two or more fans can be used as the rotor / stator device.
  • the shear zone is the area between the pairs of blades of the rotor and the stator, in which a pressure of at least 1 bar is built up and to which another area connects between at least one pair of blades of the rotor and the stator as a mixing zone and wherein the one another facing surfaces of the stator and wing pairs of the rotor are preferably structured.
  • Such apparatuses are known, for example, the name Reflector® from Lipp Mischtechnik GmbH.
  • the reaction mixture from the feed stream and the gaseous phase leaves the rotor / stator device via the radial outlet port and enters a residence time zone in which the chemical reaction takes place and the pressure regulating valve is connected downstream.
  • This residence time zone may be formed as a tubular reactor.
  • the pressure regulating valve can be followed by an apparatus for separating solids from the reaction mixture.
  • the feed stream containing one or more solid phases dissolved or dispersed in water may additionally contain one or more organic phases.
  • the feed stream may contain a magnesium salt dissolved or dispersed in water and the gaseous phase added to the feed stream may be gaseous carbon dioxide.
  • the inventive method ensures a significantly improved solubility of a gaseous phase in an aqueous, one or more solid phases containing feed stream and thus an improved reaction rate of the reaction mixture prepared thereafter.
  • the process of the invention enables the preparation of mixtures of gas, water and one or more solids using a single, relatively small apparatus, the rotor / stator device. This eliminates the need for a nozzle or frit system that is easily clogged by solids. It is an optimal, homogeneous and rapid mixing of the reactants achieved, thereby allowing a quick reaction and thus low residence times and smaller, cheaper apparatus.
  • the single figure shows the schematic representation of a preferred embodiment of a rotor / stator device for use in the method according to the invention.
  • the rotor / stator device comprises a rotor 1 and a stator 2 with mutually facing, conical surfaces forming a shear gap 3.
  • the shear gap 3 is preceded by an axial feed port 5, a radial outlet port 6 downstream and it is enclosed by an annular space 4.
  • the annular space 4 has an opening 7 to the outside.
  • An aqueous feed stream containing a solid phase was initially produced in a Supraton VortexOS 200 apparatus from Buckau-Wolf, in which 2.2 m 3 / h of demineralized water were added via the tangential connection of the apparatus and from above via a Dosing belt weigher 17.6 kg / h of Mg (OH) 2 (Magnefin®H-10 from Martinswerk GmbH) was added.
  • This aqueous feed stream was sucked in via the axial feed port of a rotor / stator device, as described in DE 197 20 959 and known under the trade name Supraton® and which was equipped with chamber tools consisting of sprockets on the rotor and the stator.
  • the reaction mixture was passed through a arranged at the bottom of the annulus radial outlet in a residence time, formed from a hydraulically guided 0.3 m 3 stirred tank, which was followed by a 4-meter-long DN 200 pipe and to which the pressure control valve connected.
  • the experiment was similar to the first embodiment, with the following modification of the residence time zone: no stirred reactor was used, but a 5 meter long DN 200 pipe in which a static mixer was installed in the middle to prevent sedimentation of solids.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne un procédé en continu pour conduire une réaction chimique dans laquelle une phase gazeuse est ajoutée à une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau, caractérisé en ce que - on utilise un dispositif à rotor/stator comprenant un rotor (1) et un stator (2) dont les surfaces tournées l'une vers l'autre forme une zone de cisaillement (3) suivie d'une zone de mélangeage (4) avec un orifice (7) vers l'extérieur de la zone de mélangeage (4), la zone de cisaillement (3) étant précédée d'une arrivée et la zone de mélangeage (4) suivie d'une sortie, - le flux de départ contenant une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau est introduit dans le dispositif à rotor/stator par l'arrivée (5) dans la zone de cisaillement (3), - une surpression d'au moins 1 bar est établie dans la zone de cisaillement (3), - la phase gazeuse est introduite dans la zone de mélangeage (4) par son orifice vers l'extérieur et incorporée dans le flux de départ sous la surpression d'au moins 1 bar établie dans la zone de cisaillement (3) ou en élevant encore plus la pression, donnant un mélange réactionnel, - lequel est amené par la sortie (6) dans une zone de séjour dans laquelle la réaction a lieu, et - en aval de laquelle est disposée une soupape de réglage de pression qui régule la pression dans la zone de mélangeage (4).
EP07727671A 2006-04-11 2007-04-03 Procédé en continu pour conduire une réaction chimique dans laquelle une phase gazeuse est ajoutée à un flux de départ contenant une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau Withdrawn EP2007510A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07727671A EP2007510A1 (fr) 2006-04-11 2007-04-03 Procédé en continu pour conduire une réaction chimique dans laquelle une phase gazeuse est ajoutée à un flux de départ contenant une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06112482 2006-04-11
EP07727671A EP2007510A1 (fr) 2006-04-11 2007-04-03 Procédé en continu pour conduire une réaction chimique dans laquelle une phase gazeuse est ajoutée à un flux de départ contenant une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau
PCT/EP2007/053200 WO2007118788A1 (fr) 2006-04-11 2007-04-03 Procédé en continu pour conduire une réaction chimique dans laquelle une phase gazeuse est ajoutée à un flux de départ contenant une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau

Publications (1)

Publication Number Publication Date
EP2007510A1 true EP2007510A1 (fr) 2008-12-31

Family

ID=38236450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727671A Withdrawn EP2007510A1 (fr) 2006-04-11 2007-04-03 Procédé en continu pour conduire une réaction chimique dans laquelle une phase gazeuse est ajoutée à un flux de départ contenant une ou plusieurs phases solides dissoutes ou dispersées dans de l'eau

Country Status (5)

Country Link
US (1) US20090323458A1 (fr)
EP (1) EP2007510A1 (fr)
KR (1) KR20090006185A (fr)
MX (1) MX2008012883A (fr)
WO (1) WO2007118788A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12227650B2 (en) 2019-12-31 2025-02-18 Dow Global Technologies Llc Method of preparing silicone-acrylate hybrid composition and hybrid composition formed thereby

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US8034972B2 (en) * 2007-06-27 2011-10-11 H R D Corporation System and process for production of toluene diisocyanate
US7482496B2 (en) 2007-06-27 2009-01-27 H R D Corporation Method for making chlorohydrins
US7919645B2 (en) 2007-06-27 2011-04-05 H R D Corporation High shear system and process for the production of acetic anhydride
US7491856B2 (en) * 2007-06-27 2009-02-17 H R D Corporation Method of making alkylene glycols
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US7479576B1 (en) * 2007-06-27 2009-01-20 H R D Corporation Method of hydrogenating aldehydes and ketones
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US12227650B2 (en) 2019-12-31 2025-02-18 Dow Global Technologies Llc Method of preparing silicone-acrylate hybrid composition and hybrid composition formed thereby

Also Published As

Publication number Publication date
KR20090006185A (ko) 2009-01-14
MX2008012883A (es) 2008-10-13
US20090323458A1 (en) 2009-12-31
WO2007118788A1 (fr) 2007-10-25

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