Abstract 1. A PROCESS FOR RECOVERING SELENIUM VALUES FROM AN AQUEOUS SOLUTION CONTAINING SELENIUM, MOLYBDENUM, AND RHENIUM VALUES, COMPRISING THE STEPS OF: (A) INTIMATELY CONTACTING SUCH AS AQUEOUS SOLUTION WITH A TERTIARY AMINE EXTRACTED SOLUTION TO EXTRACT THE SELENIUM, MOLYBDENUM, AND RHENIUM THEREFROM; (B) CONTACTING THE TERTIARY AMINE SOLUTION FROM STEP (A) WITH AN AQUEOUS SOLUTION CONTAINING AN EFFECTIVE AMOUNT OF SODIUM CARBONATE TO SELECTIVELY STRIP THE MOLYBDENUM AND RHENIUM VALUES THEREFROM; (C) THEREAFTER, CONTACTING THE STRIPPED TERTIARY AMINE SOLUTION FROM STEP (B) WITH AN AQUEOUS STRIPPING SOLUTION OF AMMONIUM HYDROXIDE OR SODIUM SULFITE TO STRIP THE SELENIUM VALUES THEREFROM; AND (D) RECOVERING THE SELENIUM VALUES FROM THE AQUEOUS STRIPPING SOLUTION FROM STEP (C).
A PROCESS FOR RECOVERING SELENIUM VALUES FROM AN AQUEOUS SOLUTION CONTAINING SELENIUM, MOLYBDENUM, AND RHENIUM VALUES, COMPRISING THE STEPS OF: (A) INTIMATELY CONTACTING SUCH AS AQUEOUS SOLUTION WITH A TERTIARY AMINE EXTRACTED SOLUTION TO EXTRACT THE SELENIUM, MOLYBDENUM, AND RHENIUM THEREFROM; (B) CONTACTING THE TERTIARY AMINE SOLUTION FROM STEP (A) WITH AN AQUEOUS SOLUTION CONTAINING AN EFFECTIVE AMOUNT OF SODIUM CARBONATE TO SELECTIVELY STRIP THE MOLYBDENUM AND RHENIUM VALUES THEREFROM; (C) THEREAFTER, CONTACTING THE STRIPPED TERTIARY AMINE SOLUTION FROM STEP (B) WITH AN AQUEOUS STRIPPING SOLUTION OF AMMONIUM HYDROXIDE OR SODIUM SULFITE TO STRIP THE SELENIUM VALUES THEREFROM; AND (D) RECOVERING THE SELENIUM VALUES FROM THE AQUEOUS STRIPPING SOLUTION FROM STEP (C).
Claim 2
Dependent Claim
112 words
A PROCESS FOR RECOVERING SELENIUM VALUES FROM AN AQUEOUS SOLUTION CONTAINING SELENIUM, MOLYBDENUM, AND RHENIUM VALUES, COMPRISING THE STEPS OF: (A) INTIMATELY CONTACTING SUCH AS AQUEOUS SOLUTION WITH A TERTIARY AMINE EXTRACTED SOLUTION TO EXTRACT THE SELENIUM, MOLYBDENUM, AND RHENIUM THEREFROM; (B) CONTACTING THE TERTIARY AMINE SOLUTION FROM STEP (A) WITH AN AQUEOUS SOLUTION CONTAINING AN EFFECTIVE AMOUNT OF SODIUM CARBONATE TO SELECTIVELY STRIP THE MOLYBDENUM AND RHENIUM VALUES THEREFROM; (C) THEREAFTER, CONTACTING THE STRIPPED TERTIARY AMINE SOLUTION FROM STEP (B) WITH AN AQUEOUS STRIPPING SOLUTION OF AMMONIUM HYDROXIDE OR SODIUM SULFITE TO STRIP THE SELENIUM VALUES THEREFROM; AND (D) RECOVERING THE SELENIUM VALUES FROM THE AQUEOUS STRIPPING SOLUTION FROM STEP (C).