WO2007066143A3 - Removal of contaminants from a bayer liquor - Google Patents

Removal of contaminants from a bayer liquor Download PDF

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Publication number
WO2007066143A3
WO2007066143A3 PCT/GB2006/050410 GB2006050410W WO2007066143A3 WO 2007066143 A3 WO2007066143 A3 WO 2007066143A3 GB 2006050410 W GB2006050410 W GB 2006050410W WO 2007066143 A3 WO2007066143 A3 WO 2007066143A3
Authority
WO
WIPO (PCT)
Prior art keywords
liquor
contaminants
burner
recycled
stand
Prior art date
Application number
PCT/GB2006/050410
Other languages
French (fr)
Other versions
WO2007066143A2 (en
Inventor
David Hipkiss
Original Assignee
Accentus Plc
David Hipkiss
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 Accentus Plc, David Hipkiss filed Critical Accentus Plc
Publication of WO2007066143A2 publication Critical patent/WO2007066143A2/en
Publication of WO2007066143A3 publication Critical patent/WO2007066143A3/en

Links

Classifications

    • 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
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/46—Purification of aluminium oxide, aluminium hydroxide or aluminates
    • C01F7/47—Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
    • C01F7/473—Removal of organic compounds, e.g. sodium oxalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0004—Crystallisation cooling by heat exchange
    • B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/005—Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof
    • 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
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/10—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
    • 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
    • B01J19/1862—Stationary reactors having moving elements inside placed in series
    • 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
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/46—Purification of aluminium oxide, aluminium hydroxide or aluminates
    • C01F7/47—Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00002—Chemical plants
    • B01J2219/00004—Scale aspects
    • B01J2219/00006—Large-scale industrial plants
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0871—Heating or cooling of the reactor
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0873—Materials to be treated
    • B01J2219/0877—Liquid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Toxicology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The Bayer process uses hot sodium hydroxide solution to obtain pure alumina from bauxite ore. Alumina dissolves, and is then precipitated, and the remaining caustic Bayer liquor can be recycled for use again. However contaminants, particularly sodium salts of organic material, tend to build up in the recycled liquor, and causes problems. Such contaminants can be destroyed using a liquor burner (30). The operation of such a liquor burner (30) can be improved by treating (12, 14) the stream of liquor so as to be supersaturated with contaminants, then subjecting it to ultrasonic irradiation (32), and separating (28) resultant crystals from the liquor fed to the burner (30). This process is enhanced if the liquor is allowed to stand (20, 22) for a significant time after the ultrasonic irradiation, is then cooled (24), and is then again allowed to stand (26) for a significant time before the crystals are separated (28).
PCT/GB2006/050410 2005-12-06 2006-11-23 Removal of contaminants from a bayer liquor WO2007066143A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0524823.2 2005-12-06
GBGB0524823.2A GB0524823D0 (en) 2005-12-06 2005-12-06 Removal of contaminants from a bayer liquor

Publications (2)

Publication Number Publication Date
WO2007066143A2 WO2007066143A2 (en) 2007-06-14
WO2007066143A3 true WO2007066143A3 (en) 2007-10-25

Family

ID=35686131

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/050410 WO2007066143A2 (en) 2005-12-06 2006-11-23 Removal of contaminants from a bayer liquor

Country Status (2)

Country Link
GB (1) GB0524823D0 (en)
WO (1) WO2007066143A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8435411B2 (en) 2009-12-15 2013-05-07 Cytec Technology Corp. Methods and compositions for the removal of impurities from an impurity-loaded organic salt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HUE047695T2 (en) 2007-12-28 2020-05-28 Cytec Tech Corp Method for the removal of impurities and water from the bayer process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280987A (en) * 1978-07-11 1981-07-28 Showa Aluminum Industries K.K. Method for treatment of Bayer liquor
WO2000010918A1 (en) * 1998-08-20 2000-03-02 Worsley Alumina Pty. Ltd. Organic impurity removal process for bayer liquors
WO2000035579A1 (en) * 1998-12-12 2000-06-22 Aea Technology Plc Process and apparatus for irradiating fluids
WO2003101578A1 (en) * 2002-05-31 2003-12-11 Accentus Plc Production of crystalline materials by using high intensity ultrasound
WO2005085136A1 (en) * 2004-03-06 2005-09-15 Accentus Plc Removal of sodium oxalate from a bayer liquor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280987A (en) * 1978-07-11 1981-07-28 Showa Aluminum Industries K.K. Method for treatment of Bayer liquor
WO2000010918A1 (en) * 1998-08-20 2000-03-02 Worsley Alumina Pty. Ltd. Organic impurity removal process for bayer liquors
WO2000035579A1 (en) * 1998-12-12 2000-06-22 Aea Technology Plc Process and apparatus for irradiating fluids
WO2003101578A1 (en) * 2002-05-31 2003-12-11 Accentus Plc Production of crystalline materials by using high intensity ultrasound
WO2005085136A1 (en) * 2004-03-06 2005-09-15 Accentus Plc Removal of sodium oxalate from a bayer liquor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; 2005, RUECROFT, GRAHAM ET AL: "Improving the Bayer process by power ultrasound induced crystallization (sonocrystallization) of key impurities", XP002444216, retrieved from STN Database accession no. 144:334628 *
RUECROFT, G., HIPKISS, D. AND FENNELL, M.: "Improving The Bayer Process By Power Ultrasound Induced Crystallization (Sonocrystallization) Of Key Impurities", LIGHT METALS (WARRENDALE, PA, UNITED STATES) 163-166 CODEN: LMPMDF; ISSN: 0147-0809, 2005, Warrendale, PA, United States, pages 163 - 166, XP008081688 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8435411B2 (en) 2009-12-15 2013-05-07 Cytec Technology Corp. Methods and compositions for the removal of impurities from an impurity-loaded organic salt

Also Published As

Publication number Publication date
GB0524823D0 (en) 2006-01-11
WO2007066143A2 (en) 2007-06-14

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