Sodium cyanide paste composition
AssigneeE. I. Du Pont de Nemours and Company
InventorsJanet Marie Rogers, Thomas Peter Tufano
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Abstract
A sodium cyanide composition having a paste-like consistency is provided which comprises sodium cyanide, a base, water, and a rheology modifier. Also provided are processes for producing and using the composition. The composition can be used in applications that require sodium cyanide solution.
Claims21
A paste composition comprising sodium cyanide, a base, and water wherein said composition has a viscosity of from about 2 to about 500 Pa.s in the shear rate range of about 1s−1 to about 10s−1.
A sodium cyanide paste composition, that readily dissolves in water to form a sodium cyanide solution, comprising:
- (a) about 45 to 82% of sodium cyanide;
- (b) about 3 to 20% of a base;
- (c) about 0 to 6% of a rheology modifier;
- and (d) at least about 15% water wherein the percentages are weight percents, based on the total weight of said composition, and said composition has a viscosity of from about 2 to about 500 Pa.s at 25° C. in the shear rate range of about 1s−1 to about 10 s−1.
A process for preparing a sodium cyanide paste composition comprising:
- (a) contacting hydrogen cyanide or hydrogen cyanide reactor gas with an aqueous medium comprising sodium hydroxide at a sufficient temperature in the presence of sufficient base to effect the production of an aqueous medium comprising sodium cyanide;
- and
- (b) cooling said aqueous medium comprising sodium cyanide to effect the production of a sodium cyanide paste composition.
Dependencies are inferred from the claim text.