Method for the reduction of metal halides

Patent metadata

Field	Value
Publication number	US-2020031684-A1
Application number	US-201816477264-A
Country	US
Kind code	A1
Filing date	Jan 24, 2018
Priority date	Jan 25, 2017
Publication date	Jan 30, 2020
Grant date	—

Abstract

The invention relates to a method for producing a compound of formula MXn from a precursor compound of formula MXm, where M is a metal, X is a halide selected from F, Cl, Br, J, m is a number selected from the range 2 to 8, and n is a number selected from the range 1 to 7, with the condition that n<m, comprising a method step in which the precursor compound is reduced with a silane compound to the compound of formula MXn.

First claim

1 .- 15 . (canceled)

16 . A method for production of a compound of formula MX n comprising providing a precursor compound of formula MX m , wherein
M is a metal, X is a halide, selected from F, Cl, Br, J, m is selected from a number from 2 to 8, and n is selected from a number from 1 to 7, with the specification that n<m, and reducing the precursor compound with a silane compound to form a compound of formula MX n .

17 . The method according to claim 16 , wherein m−n=1 or 2, and/or
wherein m=4, 5, or 6 and n=3, 4, or 5.

18 . The method according to claim 16 , wherein the metal M is selected from a transition metal, a lanthanide, an actinide, In, Tl, Sn, Pb, Sb, and Bi.

19 . The method according to claim 16 , wherein X=Cl.

20 . The method according to claim 16 , for the production of WCl 5 from WCl 6 .

21 . The method according to claim 16 , wherein the silane compound selected from the group consisting of organosilanes, silanes, halosilanes, and organohalosilanes.

22 . The method according to claim 16 , wherein the silane compound is an organosilane that has at least one methyl group that is bound to a silicon atom.

23 . The method according to claim 16 , wherein the silane compound is an oligosilane or a disilane.

24 . The method according to claim 16 , wherein the reduction is performed in a solvent that has aromatic hydrocarbons.

25 . The method according to claim 16 , wherein the molar substance amount ratio of the precursor compound to the reducing agent is between 2:1 and 1:2 with respect to the ratio of metal atoms to silicon atoms/metal oxidation number difference and/or wherein the reduction is performed at a temperature of 10° C. to 50° C.

26 . The method according to claim 16 , wherein at least 10 kg of the precursor compound of formula MX m are used.

27 . The method according to claim 16 , wherein the metal halide of formula MX n is purified via sublimation after the reduction.

28 . The method according to claim 16 , wherein, after the reduction and/or after the sublimation, the metal halide of formula MX n is obtained in a yield of >90% relative to the molar quantity of precursor compound that was used.

29 . A composition comprising the compound of formula MX n obtained by the method according to claim 16 in a purity >80 wt. %.

30 . A method compriding utilizing silane compounds to reduce a compound of formula MX n from a precursor compound of formula MX m , wherein
M is a metal, X is a halide, selected from F, Cl, Br, J, m is selected from a number from 2 to 8, and n is selected from a number from 1 to 7, with the specification that n<m.

Assignees

• Umicore Ag & Co Kg

Inventors

• Sundermeyer Joerg
• Hamel Lisa
• Ramon Mueller Ruben
• Rivas-Nass Andreas
• Doppiu Angelino
• Woerner Eileen
• Karch Ralf

Classifications

• C01G41/04 Primary

  Halides · CPC title