EP 0861699 A1 19980902 - Fine iron powder containing phosphorus
Title (en)
Fine iron powder containing phosphorus
Title (de)
Feinteiliges phosphorhaltiges Eisen
Title (fr)
Poudre fine de fer contenant du phosphore
Publication
Application
Priority
DE 19706524 A 19970219
Abstract (en)
A process for producing finely divided phosphorus-containing iron involves gaseous phase reaction of iron pentacarbonyl with a phosphorus compound, preferably phosphine. Preferably, the reaction is carried out in the presence of ammonia at above 200 degrees C. Also claimed is a finely divided phosphorus-containing iron which consists of spherical particles with 1-10 mu mean particle diameter or of filament aggregates of spheres with 0.2-3 mu diameter. Preferably, the iron contains 0.1-50 wt.% P, less than 1 wt.% C, less than 1 wt.% N, less than 0.5 wt.% H and less than 0.1 wt.% total of other impurity elements and is produced by the above process. Further claimed is apparatus for carrying out the above process, including a heated decomposition tube, devices for producing two different temperature zones, for evaporating liquid iron pentacarbonyl and for gas dosing and mixing, and a separator for finely divided phosphorus-containing iron.
Abstract (de)
Die Erfindung betrifft ein Verfahren zur Herstellung von feinteiligem phosphorhaltigem Eisen durch Umsetzung von Eisenpentacarbonyl mit einer flüchtigen Phosphorverbindung, insbesondere PH3, in der Gasphase. Die erhaltenen phosphorhaltigen Eisenpulver und Eisenwhiskers zeichnen sich durch einen besonders niedrigen Gehalt an Fremdelementen aus.
IPC 1-7
IPC 8 full level
B22F 9/16 (2006.01); B22F 1/00 (2006.01); B22F 9/28 (2006.01); B22F 9/30 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01)
CPC (source: EP US)
B22F 9/305 (2013.01 - EP US); C22C 33/0214 (2013.01 - EP US)
Citation (search report)
- [X] GB 824147 A 19591125 - GEN ANILINE & FILM CORP
- [A] DE 819690 C 19511105 - BASF AG
- [A] GB 1098522 A 19680110 - VITALY GRIGORIEVICH SYRKIN, et al
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
US 6036742 A 20000314; AT E225690 T1 20021015; DE 19706524 A1 19980820; DE 59805858 D1 20021114; EP 0861699 A1 19980902; EP 0861699 B1 20021009; ES 2185071 T3 20030416; IL 123236 A0 19980924; IL 123236 A 20001206; JP 4165920 B2 20081015; JP H10298616 A 19981110; KR 100552861 B1 20060421; KR 19980071459 A 19981026; RU 2206431 C2 20030620; TW 415861 B 20001221
DOCDB simple family (application)
US 2267498 A 19980212; AT 98102811 T 19980218; DE 19706524 A 19970219; DE 59805858 T 19980218; EP 98102811 A 19980218; ES 98102811 T 19980218; IL 12323698 A 19980209; JP 3289798 A 19980216; KR 19980004919 A 19980218; RU 98103520 A 19980219; TW 87102117 A 19980216