Separation of acids
AssigneeNational Research Development Corporation
InventorMichael W. T. Pratt
Life of this patent
Estimating the term…
Abstract
A method for the separation of nitric acid from a mixture of nitric acid with one or more of phosphoric, sulphuric or hydrochloric acids, in which the nitric acid is selectively extracted from a first phase comprising the acid mixture into a second phase by an amine nitrate. The method may conveniently be carried into effect by treating an aqueous mixture of acids with kerosene containing tri-n-octylamine nitrate and a modifyier e.g. decanol following which the excess nitric acid is stripped from the kerosene phase by water or dilute nitric acid.
Claims12
A method for the separation of nitric acid from a mixture of nitric acid with one or more of phosphoric, sulphuric or hydrochloric acids, in which the nitric acid is selectively extracted from a first phase comprising the acid mixture into a second phase by an amine nitrate.
A method for the separation of nitric acid from a mixture of nitric acid and phosphoric acid, comprising selectively extracting the nitric acid from a first phase containing the acid mixture into a second phase with an amine nitrate;
- and stripping the nitric acid extracted into the second phase from the amine nitrate with water or dilute nitric acid.
A method for the separation of nitric acid from a mixture of nitric acid and phosphoric acid, comprising selectively extracting the nitric acid from a first phase containing the acid mixture into a second phase with an amine nitrate.
A method for the separation of nitric acid from a mixture of nitric acid and one or more of phosphoric, sulfuric or hydrochloric acids comprising selectively extracting the nitric acid from a first phase containing the acid mixture into a second phase with an amine nitrate and stripping the nitric acid extracted into the second phase from the amine nitrate with water or dilute nitric acid.
Dependencies are inferred from the claim text.