Metal cyanide complexes
OwnerRene Antoine Paris, Paul Alexis Amblard +1inventors
InventorsRene Antoine Paris, Paul Alexis Amblard, Abel Claude Rousset
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Abstract
Metal cyanide complexes of a single metal or mixed-metal complexes in which a metal is complexed with cyanide. The metals preferably include [magnesium, beryllium, aluminum,] chromium, titanium, zirconium, thorium, yttrium and cobalt and nickel in addition to the lanthanide metals. An aqueous solution is prepared and the complex is isolated by crystallization with a stoichiometry of the metals determined by their proportions in the solution.
Claims13
A metal-metal cyanide complex selected from the group which consists of:
- [Mg [Mg (CN).sub.4 ], Be [Be (CN).sub.4 ], Al [Al (CN).sub.6 ],] Ti [Ti (CN).sub. 8 ], Zr [Zr (CN).sub.8 ], Th [Th (CN).sub.8 ], and Y [Y (CN).sub.6 ]. [and Ln [Ln (CN).sub.6 ], wherein Ln represents a lanthanide element with an atomic number between 57 and 71 inclusive.]
A metal-metal cyanide complex selected from the group which consists of:
- cobaltocyanic lanthanide of the formula
- Ln.sub.x H.sub.4y-3r [Co(CN).sub.6 ].sub.Y
- where y .gtoreq. 1 and 0<x-4/3 Y;
- cobalticyanic lanthanide
- Ln.sub.x H.sub.3y-3x [Co(CN).sub.6 ].sub.Y
- where y .gtoreq. 1 and 0<x<
- y;
- chromicyanic lanthanide
- Ln.sub.x H.sub.3y-3x [Cr(CN).sub.6 ].sub.Y
- where y .gtoreq. 1 and 0<x<
- y;
- nickelocyanic lanthanide
- Ln.sub.x H.sub.2y-3x [Ni(CN).sub.4 ].sub.Y
- where y .gtoreq.1 and 0<x.ltoreq. 2/3 Y;
- cobaltocyanic polylanthanide
- Ln'.sub.x Ln".sub.z . . . H.sub.4y-3x-3z . . . [Co(CN).sub.6 ].sub.7
- where y .gtoreq. 1, 0<
- x<4/3 y
- where 0<z<
- 4/3 y,
- and 4y-3x-3z .gtoreq. 0;
- cobalticyanic polylanthanide
- Ln'.sub.x Ln".sub.z . . . H.sub.3y-3x-3z [Co(CN).sub.6 ].sub.y
- where y .gtoreq. 1, 0 <x<
- y and 0 <z<y3y-3x-3z .ltoreq. 0;
- chromicyanic polylanthanide
- Ln'.sub.x Ln".sub.z . . . H.sub.3y-3x-3z . . . [Cr(CN).sub.6 ].sub.Y
- where y .gtoreq. 1, 0 <x<y, 0 <z<y, and 3y-3x-3z .gtoreq. 0;
- nickelocyanic polylanthanide
- Ln'.sub.x Ln".sub.z . . . H.sub.2y- 3x- 3z . . . [Ni(CN).sub.4 ].sub.Y
- where y >1, 0 <x<
- 2/3 Y,
- <
- z<
- 2/3 y, and
- 2y-3x-3z .gtoreq. 0;
- [polylanthanide cyanide complexes of the general formula]
- [Dn.sub.x ' Ln.sub.z " . . . H.sub.3y-3x-3z . . . [Ln (CN).sub.6 ].sub. Y ]
- [ in which Ln, Ln', Ln" . . . represent elements of the lanthanide series having an atomic number between 57 and 71 inclusive or yttrium and the coefficients x, y and z have the relationships]
- [ y .gtoreq. 1, 0 .ltoreq. x .ltoreq. y, 0 .ltoreq. z .ltoreq. y and 3y-3x-3z .gtoreq. 0;]
- [ the lanthanide cyanides of aluminum of the general formula]
- [ Al.sub.x H.sub.3y-3x [Ln (CN).sub.6 ].sub.Y ]
- [ in which Ln represents a lanthanide element having an atomic number between 57 and 71 inclusive or yttrium and the coefficients x and y are selected such that]
- [ y .gtoreq. 1 and 0 .ltoreq.x.ltoreq.y;]
- the cobalticyanides of lanthanides and of bivalent metals of the general formula
- Ln.sub.x M.sub.z H.sub.3y-3x-2z [Co.sup.III (CN).sub.6 ].sub.y
- in which M represents a bivalent metal, where Ln represents a lanthanide series element having an atomic number between 57 and 71 inclusive and x, y and z are selected such that
- Y >
- 1, 0 <x <
- y, 0 <
- z <
- y and 3y-3x-3z .gtoreq. 0;
- the cobalticyanides of a plurality of lanthanide elements and a bivalent metal wherein M may be selected from the alkaline earth metals and having the general formula
- Ln'.sub.x" Ln".sub.x" . . . M.sub.z H.sub.3y-2z-3x' -3x " . . . [Co.sup.III (CN).sub.6 ].sub.y
- where Ln', Ln" . . . are lanthanide elements with atomic number between 57 and 71 and y >km 0 <x' <
- y, 0 <
- x" <
- y, 0 <
- z <
- y and 3y-2z-3x'-3x" . . . .gtoreq. 0.
- [the polymetallic complexes of the general formula]
- [ H.sub.3-n M.sub.m/v M'.sub.p' /r . . . [Al (CN).sub.6 ]]
- [ where 0 <
- n <
- 3 and m + p + . . . = n, M, M' . . . being metallic cations with valences v, v' . . . or the ammonium ion m, p' . . . being coefficients balancing the electrical charge of the molecule.]
A process for preparing a metal cyanide comprising the steps of forming a metal cyanide complex in aqueous solution and crystallizing the complex salt from said solution, said cyanide complex being formed in solution by reacting a complex acid of the general formula H.sub.y, where M is a metal forming part of the complex, X is the coordination number of the metal and y and p are selected to insure charge balance in the molecule, with a hydroxide, oxide or carbonate of a metal which may be the same as the metal of said acid or different, said metals being selected from the group which consists of [magnesium, beryllium, aluminum,] chromium, titanium, zirconium, thorium, yttrium, cobalt, nickel and the elements of the lanthanide series having an atomic number between 57 and 71 inclusive.
A process for preparing a metal cyanide comprising the steps of forming a metal cyanide complex in aqueous solution and crystallizing the complex salt from said solution, said complex being formed in solution by reacting hydrocyanic acid in an aqueous solution with the hydroxides, oxides, carbonates or acetates of at least two different metals selected from the group which consists of [magnesium, beryllium, aluminum,] chromium, titanium, zirconium, thorium, yttrium, cobalt, nickel and the elements of the lanthanide series having an atomic number between 57 and 71 inclusive.
A metal-metalcyanide complex selected from the group which consists of:
- chromium (III) hexacyanochromate;
- titanium (IV) octacyanotitanate;
- zirconium (IV) octacyanozirconate;
- and
- thorium (IV) octacyanothorate.
Dependencies are inferred from the claim text.