ES2154146A1 - Procedimiento de purificacion de alumina por reduccion de impurezas a especies volatiles. - Google Patents

Procedimiento de purificacion de alumina por reduccion de impurezas a especies volatiles.

Info

Publication number
ES2154146A1
ES2154146A1 ES009801035A ES9801035A ES2154146A1 ES 2154146 A1 ES2154146 A1 ES 2154146A1 ES 009801035 A ES009801035 A ES 009801035A ES 9801035 A ES9801035 A ES 9801035A ES 2154146 A1 ES2154146 A1 ES 2154146A1
Authority
ES
Spain
Prior art keywords
alumina
low oxygen
volatile species
purification
heating
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.)
Granted
Application number
ES009801035A
Other languages
English (en)
Other versions
ES2154146B1 (es
Inventor
Serantes Alejandro Souto
Rivera Francisco Guitian
Aza Pendas Salvador De
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.)
Universidade de Santiago de Compostela
Original Assignee
Universidade de Santiago de Compostela
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 Universidade de Santiago de Compostela filed Critical Universidade de Santiago de Compostela
Priority to ES9801035A priority Critical patent/ES2154146B1/es
Publication of ES2154146A1 publication Critical patent/ES2154146A1/es
Application granted granted Critical
Publication of ES2154146B1 publication Critical patent/ES2154146B1/es
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Catalysts (AREA)

Abstract

Procedimiento de purificación de distintos tipos de alúmina (A1{sub,2}O{sub,3}) por reducción de impurezas (Na{sub,2}O, Fe{sub,2}O{sub,3} y K{sub,2}O) a especies volátiles mediante tratamiento térmico a temperaturas habitualmente comprendidas entre 1300 °C y 1500 °C, durante tiempos generalmente entre 1 y 6 horas, y en atmósferas controladas de baja presión parcial de O{sub,2}. En estas condiciones, las impurezas son eliminadas por reducción a especies volátiles. La alúmina así obtenida presenta amplias aplicaciones en el campo de los refractarios, y en la fabricación de materiales cerámicos avanzados y composites.
ES9801035A 1998-05-19 1998-05-19 Procedimiento de purificacion de alumina por reduccion de impurezas a especies volatiles. Expired - Fee Related ES2154146B1 (es)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES9801035A ES2154146B1 (es) 1998-05-19 1998-05-19 Procedimiento de purificacion de alumina por reduccion de impurezas a especies volatiles.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9801035A ES2154146B1 (es) 1998-05-19 1998-05-19 Procedimiento de purificacion de alumina por reduccion de impurezas a especies volatiles.

Publications (2)

Publication Number Publication Date
ES2154146A1 true ES2154146A1 (es) 2001-03-16
ES2154146B1 ES2154146B1 (es) 2001-12-01

Family

ID=8303822

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9801035A Expired - Fee Related ES2154146B1 (es) 1998-05-19 1998-05-19 Procedimiento de purificacion de alumina por reduccion de impurezas a especies volatiles.

Country Status (1)

Country Link
ES (1) ES2154146B1 (es)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000799A1 (en) * 1983-08-03 1985-02-28 Atlantic Richfield Company Production of high purity alumina
US4670231A (en) * 1983-05-13 1987-06-02 Maria-Emilia Garcia-Clavel Continuous procedure of obtention of compounds of aluminum from aluminum silicates and other aluminum ores
EP0798276A1 (en) * 1996-03-29 1997-10-01 Ngk Insulators, Ltd. Alumina sintered bodies and method for producing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670231A (en) * 1983-05-13 1987-06-02 Maria-Emilia Garcia-Clavel Continuous procedure of obtention of compounds of aluminum from aluminum silicates and other aluminum ores
WO1985000799A1 (en) * 1983-08-03 1985-02-28 Atlantic Richfield Company Production of high purity alumina
EP0798276A1 (en) * 1996-03-29 1997-10-01 Ngk Insulators, Ltd. Alumina sintered bodies and method for producing the same

Also Published As

Publication number Publication date
ES2154146B1 (es) 2001-12-01

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