WO2001003816A1 - Introduction d'un liquide dans une cuve brassee - Google Patents

Introduction d'un liquide dans une cuve brassee Download PDF

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Publication number
WO2001003816A1
WO2001003816A1 PCT/EP2000/006617 EP0006617W WO0103816A1 WO 2001003816 A1 WO2001003816 A1 WO 2001003816A1 EP 0006617 W EP0006617 W EP 0006617W WO 0103816 A1 WO0103816 A1 WO 0103816A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
stirred vessel
introducing
product
injection
Prior art date
Application number
PCT/EP2000/006617
Other languages
English (en)
Inventor
Gerhardus Willem Colenbrander
Original Assignee
Shell Internationale Research Maatschappij B.V.
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 Shell Internationale Research Maatschappij B.V. filed Critical Shell Internationale Research Maatschappij B.V.
Priority to AU61586/00A priority Critical patent/AU6158600A/en
Publication of WO2001003816A1 publication Critical patent/WO2001003816A1/fr

Links

Classifications

    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
    • 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
    • B01F23/43—Mixing liquids with liquids; Emulsifying using driven stirrers
    • 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
    • B01F33/822—Combinations of dissimilar mixers with moving and non-moving stirring devices in the same receptacle
    • 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
    • B01F35/71—Feed mechanisms
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • 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
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids

Definitions

  • the present invention relates to introducing a first liquid into a stirred vessel containing a second liquid.
  • USA patent specification No. 3 847 375 describes a method for introducing a first liquid and a second liquid into a liquid-filled space.
  • the first liquid is introduced as a high velocity jet through a first nozzle into an impulse exchange chamber that is arranged in the liquid-filled space, and the second liquid is introduced at a lower velocity through a second nozzle in the proximity of the first nozzle.
  • the impulse exchange chamber has a diameter that is of the order of magnitude of the nozzle diameter, and consequently the volume into which the first and second liquids are introduced is relatively small.
  • liquids are mixed in a stirred vessel, wherein an impeller is used to stir the mixture, is known. Stirring is done to homogenize the mixture.
  • An example in which liquids need to be mixed is when they contain reactive species that form a product when brought in contact with each other. Often in commercial reactors not just the desired product is formed but also by-products. This may be because two reactants may undergo different chemical reactions with each other, resulting in the formation of more products than just the desired one. A similar situation exists when the reactor contains more reactants than the one which has to react with the injected reactant. When these other reactants undergo a reaction with the injected one, a by-product is formed.
  • the two examples mentioned belong to the class of reaction systems that is called parallel competitive reactions. Another class is called consecutive competitive reactions; an example of this class is the reaction of the desired product with the injected reactant to an unwanted by-product.
  • the method of introducing a first liquid in a stirred vessel containing a second liquid comprising injecting the first liquid into the stirred vessel, wherein the ratio of injection velocity over impeller tip speed is greater than 2.
  • the injection velocity is at least 3 m/s.
  • reaction equations are: NaOH + HCl - NaCl + H 2 0 (the acid-base neutralization), and NaOH + CH 2 C1C00C 2 H5 -> CH 2 ClCOONa + C 2 H 5 OH.
  • the reactions were carried out in a 10 1 (litre) vessel, having an inner diameter of 0.24 m (metre) provided with an impeller having an outer diameter of 0.08 m.
  • the nozzle diameter was varied between 0.5 and 3.0 mm (millimetre) .
  • the vessel was filled with a second liquid in the form of an aqueous solution of HCl having a concentration of 0.05 mol/1.
  • a first liquid in the form of a mixture of ethylchloroacetate and sodium hydroxide in water, each of these reactants having a concentration of 0.12 mol/1 in this first liquid.
  • the injection was maintained at a volumetric flow rate of 0.5 1/minute for a period of one minute.
  • the injection velocity was varied by varying the nozzle diameter.
  • a sample taken from the vessel after the injection was completed was analysed with a gas chro atograph .
  • the by-product yield is the ratio of the amount of ethanol (C 2 H5 ⁇ H) produced to the amount of sodium hydroxide added.
  • the results of the experiments are summarized in the below Table.
  • V t is the impeller tip speed in m/s (metre/second)
  • V j _ is the injection velocity in m/s
  • R is the ratio V ⁇ /V- ) -
  • P ⁇ p is the total power consumed in W (Watt)
  • P ⁇ is the power consumed by the injection through the nozzle (W)
  • BPY is the by-product yield.
  • the liquids consist of miscible liquids
  • the method of the invention can as well be applied to multi-phase mixtures where the reactants have to be transported across phase boundaries.
  • multi-phase mixtures are gas-in-liquid dispersions or liquid-in-liquid dispersions of immiscible liquids, with or without suspended solid particles.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne un procédé d'introduction d'un premier liquide dans une cuve brassée contenant un deuxième liquide. Ce procédé consiste à injecter le premier liquide dans la cuve brassée. Le rapport de vitesse d'injection sur la vitesse de la pointe de la palette d'agitation est supérieur à 2.
PCT/EP2000/006617 1999-07-14 2000-07-11 Introduction d'un liquide dans une cuve brassee WO2001003816A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU61586/00A AU6158600A (en) 1999-07-14 2000-07-11 Introducing a liquid into a stirred vessel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP99305579.7 1999-07-14
EP99305579 1999-07-14

Publications (1)

Publication Number Publication Date
WO2001003816A1 true WO2001003816A1 (fr) 2001-01-18

Family

ID=8241515

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/006617 WO2001003816A1 (fr) 1999-07-14 2000-07-11 Introduction d'un liquide dans une cuve brassee

Country Status (2)

Country Link
AU (1) AU6158600A (fr)
WO (1) WO2001003816A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8931948B2 (en) 2008-10-01 2015-01-13 Bp Corporation North America Inc. Process and apparatus for mixing a fluid within a vessel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847375A (en) * 1972-10-12 1974-11-12 Basf Ag Method and apparatus for mixing liquids
EP0209095A2 (fr) * 1985-07-17 1987-01-21 Waagner-Biro Aktiengesellschaft Procédé et dispositif pour la gazéification
JPH07204412A (ja) * 1994-01-17 1995-08-08 Fuji Electric Co Ltd 薬注率自動決定装置と自動決定方法
JPH10267710A (ja) * 1997-03-28 1998-10-09 Zexel Corp 噴射量の算出方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847375A (en) * 1972-10-12 1974-11-12 Basf Ag Method and apparatus for mixing liquids
EP0209095A2 (fr) * 1985-07-17 1987-01-21 Waagner-Biro Aktiengesellschaft Procédé et dispositif pour la gazéification
JPH07204412A (ja) * 1994-01-17 1995-08-08 Fuji Electric Co Ltd 薬注率自動決定装置と自動決定方法
JPH10267710A (ja) * 1997-03-28 1998-10-09 Zexel Corp 噴射量の算出方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 9540, Derwent World Patents Index; AN 1995-307277, XP002120108 *
DATABASE WPI Week 9851, Derwent World Patents Index; AN 1998-598194, XP002120109 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8931948B2 (en) 2008-10-01 2015-01-13 Bp Corporation North America Inc. Process and apparatus for mixing a fluid within a vessel

Also Published As

Publication number Publication date
AU6158600A (en) 2001-01-30

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