C01F7/20—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts
C01F7/24—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with nitric acid or nitrogen oxides
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
Y02W30/00—Technologies for solid waste management
Y02W30/50—Reuse, recycling or recovery technologies
Y02W30/91—Use of waste materials as fillers for mortars or concrete
Nouveau procédé de traitement antipollution d'un catalyseur de raffinage à l'état usé et récupération totale des différents constituants métalliques dudit catalyseur
Procede de regeneration d'un additif de piegeage du soufre utilise dans la preparation d'une emulsion d'hydrocarbure dans l'eau formant un combustible et procede de recuperation de l'additif de piegeage du soufre a partir d'une cendre de combustion