Recovery of magnesium chloride dihydrate

Abstract

Abstract IN THE SO-CALLED "NALCO-FREEPORT PROCESS FOR THE PRODUCTION OF ORGANOLEAD COMPOUNDS BY THE ELECTROLYTIC DECOMPOSITION OF A SACRIFICAL LEAD ANODE UTILIZING A MIXTURE OF ANHYDROUS OXYGENATED SOLVENT CONSISTING PREFERABLY OF THE DIETHYLETHER OF TETRATHYLENE GLYCOL (DETEG) AND TETRAHYDROFURAN (THF) IN THE OPERABLE RATIO OF 25-50/75-50; A PREFERRED RATIO OF 30-40/70-60 AND AN OPTIMUM VALUE OF 35/65 BY WEIGHT PERCENT, WITH THE CONSEQUENT BYPRODUCTION OF ANHYDROUS MAGNESIUM CHLORIDE (MGCL2), THE STEP AND IMPROVEMENT WHICH CONSISTS OF SEPARATING AND RECOVERING MAGNESIUM VALUES BY TREATMENT OF THE MAGNESIUM CHLORIDE WITH STOICHIOMETRIC AMOUNTS OF WATER TO FORM A MAGNESIUM CHLORIDE HIGHER HYDRATE PRECIPATE (MGCL2.XH2O WHERE X EQUALS ABOUT 4 TO 6 MOLS OF WATER PER MOL MGCL2). A PERFERRED SPECIES OF TITRATON AGENT COMPRISES A RATIO OF H2O/THF OF ABOUT 25-50/75-50, AND AN OPTIMUM RATIO OF ABOUT H2O/THF OF 35/65 IN WEIGHT PERCENT, SEPARATING A HIGHER HYDRATE PRECIPITATE FROM THE SOLVENT MIX AND RECOVERING AND HEATING HIGHER HYDRATE AT ABOUT 160180*C. TO REMOVE WATER AND REDUCE THE HYDRATION VALUE, AND RECOVERING MGCL2.2H2O, THE COMMERICAL DIHYDRATE WHICH IS INPUT TO A CELL FOR THE PRODUCTION OF MAGNESIUM METAL.

Inventors

• 👤 Richard L Craig
• 👤 Evan A Mayerle
• 👤 Virgil L Seale
• 👤 E A Hunter

Bibliographic Details