ES2006407A6 - Process for reducing the impurities in lyes in the bayer process. - Google Patents

Process for reducing the impurities in lyes in the bayer process.

Info

Publication number
ES2006407A6
ES2006407A6 ES8801134A ES8801134A ES2006407A6 ES 2006407 A6 ES2006407 A6 ES 2006407A6 ES 8801134 A ES8801134 A ES 8801134A ES 8801134 A ES8801134 A ES 8801134A ES 2006407 A6 ES2006407 A6 ES 2006407A6
Authority
ES
Spain
Prior art keywords
membrane
impurities
permeoselective
lye
bayer process
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
Application number
ES8801134A
Other languages
Spanish (es)
Inventor
Gregory P Brown
Otto Tschamper
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.)
Rio Tinto Switzerland AG
Original Assignee
Alusuisse Holdings AG
Schweizerische Aluminium 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 Alusuisse Holdings AG, Schweizerische Aluminium AG filed Critical Alusuisse Holdings AG
Publication of ES2006407A6 publication Critical patent/ES2006407A6/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
    • B01D61/44—Ion-selective electrodialysis
    • B01D61/445—Ion-selective electrodialysis with bipolar membranes; Water splitting
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Urology & Nephrology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

EN PROCEDIMIENTO PARA LA DISMINUCION DE LAS IMPUREZAS INORGANICAS Y ORGANICAS DISUELTAS EN LEJIAS ACUOSAS EN EL PROCESO BAYER PARA LA PREPARACION DE HIDROXIDO DE ALUMINIO SE UTILIZAN ADICIONES QUE HACEN NECESARIAS REALIZACIONES COSTOSAS DEL PROCEDIMIENTO Y UN CONSUMO AUMENTADO DE LEJIA, LO CUAL ELEVA LOS COSTOS DE PRODUCCION Y NO GARANTIZA EN TODOS LOS CASOS UNA BUENA CALIDAD DEL PRODUCTO.ESTAS DESVENTAJAS PUEDEN EVITARSE SI LA LEJIA PV IMPURIFICADA ES SOMETIDA A UNA ELECTRODIALISIS CON UTILIZACION DE POR LO MENOS UNA MEMBRANA PERMEOSELECTIVA PARA ANIONES Y/O POR LO MENOS UNA MEMBRANA PERMEOSELECTIVA PARA CATIONES Y POR LO MENOS UNA MEMBRANA BIPOLAR, QUE DISOCIDA EL AGUA, CON FORMACION DE UNA COMPONENTE DE LEJIAS ALCALINA PR, QUE ES AGREGADA A LA LEJIA EN CIRCUITO DEL PROCESO BAYER, Y DE UNA COMPONENTE DE IMPUREZAS V, QUE ES RETIRADA DEL PROCESO Y DESECHADA.IN THE PROCEDURE FOR THE REDUCTION OF INORGANIC AND ORGANIC IMPURITIES DISSOLVED IN AQUEOUS SOLES IN THE BAYER PROCESS, FOR THE PREPARATION OF ALUMINUM HYDROXIDE, ADDITIONS ARE USED THAT MAKE COSTLY CARRIED OUT OF THE PROCEDURE AND AN INCREASED CONSUMPTION OF SOLE, WHICH RAISES PRODUCTION COSTS AND IT DOES NOT GUARANTEE GOOD PRODUCT QUALITY IN ALL CASES. THESE DISADVANTAGES CAN BE AVOIDED IF THE IMPURIFIED PV LYE IS SUBJECTED TO ELECTRODIALYSIS USING AT LEAST ONE PERMEOSELECTIVE MEMBRANE FOR ANIONS AND/OR AT LEAST ONE PERMEOSELECTIVE MEMBRANE FOR CATIONS AND AT LEAST ONE BIPOLAR MEMBRANE, WHICH DISSOCIDES THE WATER, WITH FORMATION OF A COMPONENT OF ALKALINE LYES PR, WHICH IS ADDED TO THE LYE IN THE BAYER PROCESS CIRCUIT, AND OF A COMPONENT OF IMPURITIES V, WHICH IS REMOVED FROM THE PROCESS AND DISCARDED.

ES8801134A 1987-04-15 1988-04-13 Process for reducing the impurities in lyes in the bayer process. Expired ES2006407A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH146887 1987-04-15

Publications (1)

Publication Number Publication Date
ES2006407A6 true ES2006407A6 (en) 1989-04-16

Family

ID=4211189

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8801134A Expired ES2006407A6 (en) 1987-04-15 1988-04-13 Process for reducing the impurities in lyes in the bayer process.

Country Status (8)

Country Link
EP (1) EP0309509A1 (en)
CN (1) CN88102321A (en)
AU (1) AU610158B2 (en)
BR (1) BR8806904A (en)
ES (1) ES2006407A6 (en)
GR (1) GR880100210A (en)
HU (1) HUT52005A (en)
WO (1) WO1988007975A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310553A1 (en) * 1987-10-01 1989-04-05 Alusuisse-Lonza Services Ag Process for the reduction of lye impurities in the Bayer process
US4976838A (en) * 1988-12-01 1990-12-11 Allied-Signal Inc. Method for purification of bases from materials comprising base and salt
US5135626A (en) * 1988-12-01 1992-08-04 Allied-Signal Inc. Method for purification of bases from materials comprising base and salt
WO1990012637A2 (en) * 1989-03-15 1990-11-01 Pulp And Paper Research Institute Of Canada Electrodialytic water splitting process for the treatment of aqueous electrolytes
FR2729305A1 (en) * 1995-01-18 1996-07-19 Atochem Elf Sa REGENERATION OF STRONG ORGANIC ACIDS BY BIPOLAR MEMBRANES
DE19604903A1 (en) * 1996-02-10 1997-08-14 Huels Chemische Werke Ag Process for the separation of lye from condensation resins
US5753097A (en) * 1996-10-03 1998-05-19 Sachem, Inc. Process for purifying hydroxide compounds
US5709790A (en) * 1996-10-03 1998-01-20 Sachem, Inc. Electrochemical process for purifying hydroxide compounds
DE19856376A1 (en) * 1998-12-07 2000-06-08 Basf Ag Process for the production or purification of onium hydroxides by means of electrodialysis
CN104016388B (en) * 2014-06-12 2016-03-30 合肥工业大学 A method for separating alkaline feed liquid in alumina production
CN110510714A (en) * 2019-08-26 2019-11-29 北京廷润膜技术开发股份有限公司 A kind of electrodialysis plant and the method using electrodialysis plant separation alkali and salt
CN113044863B (en) * 2021-04-25 2022-06-21 百色学院 A kind of method for improving the decomposition rate of seeds in alumina production

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219396A (en) * 1979-08-03 1980-08-26 Allied Chemical Corporation Electrodialytic process
US4238305A (en) * 1979-10-29 1980-12-09 Allied Chemical Corporation Electrodialytic process for the conversion of impure soda values to sodium hydroxide and carbon dioxide
US4592817A (en) * 1984-12-03 1986-06-03 Allied Corporation Electrodialytic water splitting process for gaseous products

Also Published As

Publication number Publication date
AU610158B2 (en) 1991-05-16
HUT52005A (en) 1990-06-28
EP0309509A1 (en) 1989-04-05
WO1988007975A1 (en) 1988-10-20
BR8806904A (en) 1989-10-31
AU1543388A (en) 1988-11-04
GR880100210A (en) 1989-01-31
CN88102321A (en) 1988-11-02

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20000601