Stabilized ammonium polysulfide solutions and process utilizing same
AssigneeThe Western Company of North America
InventorsRichard F. Miller, Eugene H. Morselander
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Abstract
A stabilized ammonium polysulfide solution comprising an aqueous solution of ammonium polysulfide and a stabilizing amount of a water soluble, stabilizing compound that can be an azacyclic compound, a compound having the formula R--O--(C.sub.n H.sub.2n)NH.sub.2 or a compound having the formula (CH.sub.3).sub.2 NR.sub.1, the pH of the composition being from 7 to 14, the stabilized composition being useful in controlling the cyanide concentration in aqueous streams.
Claims11
A method of stabilizing aqueous ammonium polysulfide solutions comprising admixing with said ammonium polysulfide solution a stabilizing amount of a water soluble stabilizing compound selected from the group consisting of azacyclic compounds, compounds having the formula R--O--C.sub.n H.sub.2n --NH.sub.2, wherein R is an alkyl group of from 1 to 3 carbon atoms and n is 1 to 3, compounds having the formula (CH.sub.3).sub.2 NR.sub.1, wherein R.sub.1 is a hydrocarbon group having from 1 to 6 carbon atoms and mixtures thereof, that are soluble in said ammonium polysulfide solution, the pH of said ammonium polysulfide solution being in the range of from 7 to 14.
A stabilized composition of ammonium polysulfide comprising an aqueous solution of ammonium polysulfide and a stabilizing amount of a water soluble, stabilizing compound selected from the group consisting of azacyclic compounds, compounds having the formula R--O--C.sub.n H.sub.2n --NH.sub.2 wherein R is an alkyl group of from 1 to 3 carbon atoms and n is 1 to 3, compounds having the formula (CH.sub.3).sub.2 NR.sub.1, wherein R.sub.1 is a hydrocarbon group having from 1 to 6 carbon atoms and mixtures thereof, the pH of said composition being from 7 to 14.
A method of controlling the cyanide concentration in an aqueous stream comprising introducing into said aqueous stream an effective amount of a composition comprising an aqueous solution of ammonium polysulfide and a stabilizing amount of a water soluble, stabilizing compound selected from the group consisting of azacyclic compounds, compounds having the formula R--O--C.sub.n H.sub.2n --NH.sub.2, wherein R is an alkyl group of from 1 to 3 carbon atoms and n is 1 to 3, compounds having the formula (CH.sub.3).sub.2 NR.sub.1, wherein R.sub.1 is a hydrocarbon group having from 1 to 6 carbon atoms and mixtures thereof, the pH of said composition being from 7 to 14.
Dependencies are inferred from the claim text.