Global Patent Index - EP 0611837 A4

EP 0611837 A4 19941012 - METHOD FOR OBTAINING ALUMINIUM FROM ALUMINA-CONTAINING RAW MATERIAL.

Title (en)

METHOD FOR OBTAINING ALUMINIUM FROM ALUMINA-CONTAINING RAW MATERIAL.

Title (de)

VERFAHREN ZUR GEWINNUNG VON ALUMINIUM AUS ALIMINIUMOXYDHALTIGEN AUSGANGSMATERIAL.

Title (fr)

PROCEDE D'OBTENTION D'ALUMINIUM A PARTIR D'UNE MATIERE PREMIERE CONTENANT DE L'OXYDE D'ALUMINIUM.

Publication

EP 0611837 A4 19941012 (EN)

Application

EP 92917708 A 19920804

Priority

  • CA 2122364 A 19920804
  • RU 9200149 W 19920804

Abstract (en)

[origin: EP0611837A1] The proposed method provides for one-stage treatment of an alumina-containing raw-material with a mixture of alkali metal salts of a fluorine-containing oxygen-free acid and hydrochloric acid taken at the ratio of respectively from 5:1 to 1:7.5 parts by weight. The mixture of the salts is introduced at the quantity of 40-85 % of the total weight, and treatment is carried out at a temperature of 850-1100 DEG C up to obtaining a reactional mass consisting of non-mixing fluoride-silicate and chloride- aluminate alkaline melts. The chloride-aluminate alkaline melt is separated from the obtained mass and introduced to the melt of alkali metal chlorides, and the obtained mass is subjected to electrolysis up to obtaining the desired product. The invention may be used in the fields of technology connected with the obtaining and use of aluminium.

IPC 1-7

C25C 3/06; C22B 3/06

IPC 8 full level

C25C 3/18 (2006.01)

CPC (source: EP)

C25C 3/18 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0611837 A1 19940824; EP 0611837 A4 19941012; CA 2122364 A1 19940217; WO 9403653 A1 19940217

DOCDB simple family (application)

EP 92917708 A 19920804; CA 2122364 A 19920804; RU 9200149 W 19920804