Disclosed herein are methods of making acidic short-chain potassium polyphosphate compositions with reduced levels of water-insoluble materials. Also disclosed herein are acidic short-chain potassium polyphosphate compositions.

Disclosed herein are methods of making acidic short-chain potassium polyphosphate compositions with reduced levels of water-insoluble materials. Also disclosed herein are acidic short-chain potassium polyphosphate compositions.

A solid electrolyte including Li, Al, P, O, and N, wherein the solid electrolyte has a P.sub.2O.sub.7 structure.

A renewable magnesium removing agent and its use in a preparation of a low-magnesium lithium-rich brine are provided. The magnesium removing agent includes a magnesium phosphate double salt of an alkali metal or ammonium. A regeneration of the magnesium removing agent is realized by adding the magnesium removing agent into Mg.sup.2+-containing chloride salt solution, wherein Mg.sup.2+ in the chloride salt solution and the magnesium removing agent are subjected to a magnesium removing reaction to form a solid-phase reaction product and carrying out a solid-liquid separation on an obtained mixed reaction product after the magnesium removing reaction is ended to separate the solid-phase material comprising a magnesium phosphate hydrate and then separating out a chlorine salt of the alkali metal or the ammonium from a remaining liquid-phase material, and finally carrying out a regeneration reaction on the magnesium phosphate hydrate and the chlorine salt of the alkali metal or the ammonium.

A renewable magnesium removing agent and its use in a preparation of a low-magnesium lithium-rich brine are provided. The magnesium removing agent includes a magnesium phosphate double salt of an alkali metal or ammonium. A regeneration of the magnesium removing agent is realized by adding the magnesium removing agent into Mg.sup.2+-containing chloride salt solution, wherein Mg.sup.2+in the chloride salt solution and the magnesium removing agent are subjected to a magnesium removing reaction to form a solid-phase reaction product and carrying out a solid-liquid separation on an obtained mixed reaction product after the magnesium removing reaction is ended to separate the solid-phase material comprising a magnesium phosphate hydrate and then separating out a chlorine salt of the alkali metal or the ammonium from a remaining liquid-phase material, and finally carrying out a regeneration reaction on the magnesium phosphate hydrate and the chlorine salt of the alkali metal or the ammonium.

A solid electrolyte including Li, Al, P, O, and N, wherein the solid electrolyte has a P.sub.2O.sub.7 structure.

A solid electrolyte including Li, Al, P, O, and N, wherein the solid electrolyte has a P.sub.2O.sub.7 structure.

The invention is related to a flotation process using an improved collector to remove alkaline earth metal carbonate impurities from phosphate ores. The flotation feed may be conditioned with the improved carbonate collector at acidic pH, and subjected to a reverse flotation. The cell overflow may be collected as waste in which carbonate minerals dominate, and the cell underflow may be the phosphate concentrate. The collector may be a combination of chemicals, comprising: (1) any kind of fatty acids, either conventional fatty acid, saponified fatty acid, or modified fatty acid; (2) chemicals with sulfonate or sulfate groups, such as dodecylbenzene sulfonic acid (DDBSA) or its salt, sodium dodecyl sulfate (SDS), sodium lauryl sulfate (SLS), sodium coco sulfate (SCS), etc.; and (3) phosphorous-bearing chemicals, such as sodium tripolyphosphate (STPP), sodium hexametaphosphate (SFMP), trisodium phosphate (TSP), Tetrasodiumpyrophosphate (TSPP), etc. With the improved collector, the separation selectivity and phosphate recovery may be significantly improved.

The invention is related to a flotation process using an improved collector to remove alkaline earth metal carbonate impurities from phosphate ores. The flotation feed may be conditioned with the improved carbonate collector at acidic pH, and subjected to a reverse flotation. The cell overflow may be collected as waste in which carbonate minerals dominate, and the cell underflow may be the phosphate concentrate. The collector may be a combination of chemicals, comprising: (1) any kind of fatty acids, either conventional fatty acid, saponified fatty acid, or modified fatty acid; (2) chemicals with sulfonate or sulfate groups, such as dodecylbenzene sulfonic acid (DDBSA) or its salt, sodium dodecyl sulfate (SDS), sodium lauryl sulfate (SLS), sodium coco sulfate (SCS), etc.; and (3) phosphorous-bearing chemicals, such as sodium tripolyphosphate (STPP), sodium hexametaphosphate (SFMP), trisodium phosphate (TSP), Tetrasodiumpyrophosphate (TSPP), etc. With the improved collector, the separation selectivity and phosphate recovery may be significantly improved.

A polyphosphate material is disclosed. The polyphosphate material can include a plurality of polyphosphate chains. The polyphosphate chains can have a backbone that include oxygen-phosphate bonds. Two or more cations can be included. Further, the polyphosphate material can be amorphous. The two or more cations can be monovalent cations, divalent cations, trivalent cations, tetravalent cations, and combinations thereof. The two or more cations can be lithium, sodium, potassium, rubidium, cesium, francium, ammonium, beryllium, magnesium, calcium, strontium, barium, radium, zinc, titanium, iron (Fe.sup.2+), chromium (Cr.sup.2+), manganese (Mn.sup.2+), cobalt (Co.sup.2+), nickel (Ni.sup.2+), copper (Cu.sup.2+), cadmium, tin (Sn.sup.2+), mercury (Hg.sup.2+), lead (Pb.sup.2+), aluminum, boron, gallium, iron (Fe.sup.+3), chromium (Cr.sup.+3), cobalt (Co.sup.+3), gold (Au.sup.+3), antimony (Sb.sup.+3), nickel (Ni.sup.+3), bismuth (Bi.sup.+3), manganese (Mn.sup.+3) zirconium, silicon, and combinations of thereof. The two or more cations can be monovalent cations. The two or more cations can be sodium and potassium or potassium and lithium.