EP 0170372 A1 19860205 - Metallothermic reduction of rare earth oxides with calcium metal.

Title (en)

Metallothermic reduction of rare earth oxides with calcium metal.

Title (de)

Metallothermische Reduktion seltener Erdoxide mittels Kalzium.

Title (fr)

Réduction métallothermique d'oxydes de terres rares par du calcium métallique.

Publication

EP 0170372 A1 19860205 (EN)

Application

EP 85304046 A 19850607

Priority

US 62773684 A 19840703

Abstract (en)

Rare earth oxides can be reduced to rare earth metals by, a novel, high yield, metallothermic process. The oxides are dispersed in a suitable, molten, calcium chloride-based bath (44) along with calcium metal. The bath (44) is agitated and calcium metal reduces the rare earth oxides to rare earth metals. The metals collect in a discrete layer (43) in the reaction vessel (22).

IPC 1-7

C22B 59/00; C22B 5/04

IPC 8 full level

C22B 5/04 (2006.01); C22B 26/20 (2006.01); C22B 59/00 (2006.01)

CPC (source: EP KR)

C22B 5/00 (2013.01 - KR); C22B 5/04 (2013.01 - EP); C22B 59/00 (2013.01 - EP)

Citation (search report)

[X] GB 190923215 A 19100929 - KUZEL HANS [AT], et al
[A] FR 2396802 A1 19790202 - JOHNSON MATTHEY CO LTD [GB]
[A] US 2950962 A 19600830 - NORMAN CARLSON OSCAR, et al
[A] GB 1040468 A 19660824 - DOW CHEMICAL CO
[AD] EP 0108474 A2 19840516 - GEN MOTORS CORP [US]
[X] CHEMICAL ABSTRACTS, vol. 99, 1983, abstract no. 126355g, Columbus, Ohio, US; & SU-A-1 027 232 (SCIENTIFIC-RESEARCH INSTITUTE OF METALLURGY) 07-07-1983

Designated contracting state (EPC)

AT DE FR GB IT NL SE

DOCDB simple family (publication)

EP 0170372 A1 19860205; EP 0170372 B1 19880817; AT E36560 T1 19880915; AU 4448885 A 19860109; AU 575965 B2 19880811; BR 8503140 A 19860318; DE 3564451 D1 19880922; ES 544799 A0 19870101; ES 8702508 A1 19870101; JP S6130639 A 19860212; JP S6137341 B2 19860823; KR 860001203 A 19860224; KR 910001581 B1 19910316; MX 173880 B 19940407; ZA 854474 B 19860326

DOCDB simple family (application)

EP 85304046 A 19850607; AT 85304046 T 19850607; AU 4448885 A 19850702; BR 8503140 A 19850628; DE 3564451 T 19850607; ES 544799 A 19850702; JP 14645085 A 19850703; KR 850004710 A 19850701; MX 2661685 A 19850628; ZA 854474 A 19850613