A process of preparing an alkali salt solution for the production of catalysts or promoters of catalysts, the process comprising the steps of: (i) Passing a solution containing a mixture of potassium, rubidium and caesium sulfates through an evaporative crystallisation step to obtain a potassium containing salt, and a solution comprising rubidium and caesium sulfate; (ii) Further evaporative crystallisation of the liquid product of step (i) to obtain a rubidium containing salt and a solution enriched in caesium sulfate; and (iii) Mixing one or more of the obtained salts and the solution at a desired ratio to prepare the alkali salt solution.
A process for the recovery of lithium carbonate from a solution (1) containing a mixture of lithium sulfate and lithium hydroxide, the process comprising the precipitation of lithium carbonate (3) from the solution (1) containing a mixture of lithium sulfate and lithium hydroxide through the addition of carbon dioxide (2).
A process of preparing an alkali salt solution for the production of catalysts or promoters of catalysts, the process comprising the steps of: (i) Passing a solution containing a mixture of potassium, rubidium and caesium sulfates through an evaporative crystallisation step to obtain a potassium containing salt, and a solution comprising rubidium and caesium sulfate; (ii) Further evaporative crystallisation of the liquid product of step (i) to obtain a rubidium containing salt and a solution enriched in caesium sulfate; and (iii) Mixing one or more of the obtained salts and the solution at a desired ratio to prepare the alkali salt solution.
C05D 1/04 - Fertilisers containing potassium from minerals or volcanic rocks
C07C 51/09 - Preparation of carboxylic acids or their salts, halides, or anhydrides from carboxylic acid esters or lactones
C07C 67/343 - Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by change of size of the carbon skeleton by increase in the number of carbon atoms
A process for the recovery of lithium carbonate from a solution (1) containing a mixture of lithium sulfate and lithium hydroxide, the process comprising the precipitation of lithium carbonate (3) from the solution (1) containing a mixture of lithium sulfate and lithium hydroxide through the addition of carbon dioxide (2).
A process for the recovery of lithium carbonate from a solution (1) containing a mixture of lithium sulfate and lithium hydroxide, the process comprising the precipitation of lithium carbonate (3) from the solution (1) containing a mixture of lithium sulfate and lithium hydroxide through the addition of carbon dioxide (2).
01 - Chemical and biological materials for industrial, scientific and agricultural use
06 - Common metals and ores; objects made of metal
Goods & Services
Alkali metals, compounds of alkali metals, lithium, lithium
compounds, including lithium carbonate, lithium chloride and
lithium hydroxide; aluminium compounds, including aluminium
hydroxide; potassium and potassium compounds, including
potassium sulfate; rubidium and rubidium compounds,
including rubidium sulfate; caesium and caesium compounds,
including caesium sulfate; chemical concentrates and
intermediate products containing lithium, potassium,
rubidium or caesium. Metal containing ores, concentrates and the intermediate
products obtained by mineral processing operations;
aluminium metal; ores contaning lithium, potassium, rubidium
or caesium; ores, metal powders and alloys containing
aluminium.
A method to produce a brine from mixed alum salts, the method comprising the steps of: (i) Dissolving or pulping alum salts (1) containing rubidium alum, cesium alum and/or potassium alum in water or a recycled liquor and adding a neutralising agent to precipitate (20) aluminium as aluminium hydroxide and some sulfate; (ii) Passing the product of step (i) to a solid liquid separation stage (21) to remove precipitated solids (5) from step (i); (iii) A decant or filtrate (6) from step (ii) is passed to a solvent extraction stage (2427) whereby any contained cesium and rubidium is selectively extracted into the organic phase to form a loaded organic solution (16); (iv) Contacting the loaded organic solution (16) of step (iii) with a scrub solution (17), which is at a pH lower than the extraction pH, to effectively scrub co-loaded potassium from the organic phase; (v) Contacting the scrubbed organic (19) of step (iv) with formic acid (20) to strip cesium and rubidium from the organic, the stripped cesium and rubidium forming a cesium and/or rubidium sulfate brine (21); and (vi) Recycling the stripped organic (22) of step (v) to the extraction stage (24-27).
A method to produce a brine from mixed alum salts, the method comprising the steps of: (i) Dissolving or pulping alum salts (1) containing rubidium alum, cesium alum and/or potassium alum in water or a recycled liquor and adding a neutralising agent to precipitate (20) aluminium as aluminium hydroxide and some sulfate; (ii) Passing the product of step (i) to a solid liquid separation stage (21) to remove precipitated solids (5) from step (i); (iii) A decant or filtrate (6) from step (ii) is passed to a solvent extraction stage (24–27) whereby any contained cesium and rubidium is selectively extracted into the organic phase to form a loaded organic solution (16); (iv) Contacting the loaded organic solution (16) of step (iii) with a scrub solution (17), which is at a pH lower than the extraction pH, to effectively scrub co-loaded potassium from the organic phase; (v) Contacting the scrubbed organic (19) of step (iv) with formic acid (20) to strip cesium and rubidium from the organic, the stripped cesium and rubidium forming a cesium and/or rubidium sulfate brine (21); and (vi) Recycling the stripped organic (22) of step (v) to the extraction stage (24-27).
A process for the recovery of lithium from minerals rich in lithium and phosphate, the process comprising passing an ore containing one or more minerals rich in lithium and phosphate to an acid leach step thereby producing a pregnant leach solution, subjecting the pregnant leach solution to a series of process steps by which one or more impurity elements are removed, and recovering lithium as a lithium containing salt product, wherein the series of process steps by which one or more impurity elements are removed includes a low pH impurity removal step conducted at an elevated temperature for the precipitation of one or more impurities.
A process for the recovery of lithium from minerals rich in lithium and phosphate, the process comprising passing an ore (1) containing one or more minerals rich in lithium and phosphate to an acid leach step (60) thereby producing a pregnant leach solution (9), subjecting the pregnant leach solution (9) to a series of process steps by which one or more impurity elements (14) are removed, and recovering lithium as a lithium containing salt product (28), wherein the series of process steps by which one or more impurity elements are removed includes a low pH impurity removal step (80) conducted at an elevated temperature for the precipitation of one or more impurities.
A process for the recovery of lithium from minerals rich in lithium and phosphate, the process comprising passing an ore (1) containing one or more minerals rich in lithium and phosphate to an acid leach step (60) thereby producing a pregnant leach solution (9), subjecting the pregnant leach solution (9) to a series of process steps by which one or more impurity elements (14) are removed, and recovering lithium as a lithium containing salt product (28), wherein the series of process steps by which one or more impurity elements are removed includes a low pH impurity removal step (80) conducted at an elevated temperature for the precipitation of one or more impurities.
A process for the recovery of lithium from lithium bearing mica rich minerals, the process comprising passing an ore containing one or more lithium bearing mica rich minerals to at least one pre-treatment step, passing the pre-treated ore to an acid leach step thereby producing a pregnant leach solution, subjecting the pregnant leach solution to a series of process steps in which one or more impurity metals are removed, and recovering lithium as a lithium containing salt product.
C22B 1/00 - Preliminary treatment of ores or scrap
C22B 3/20 - Treatment or purification of solutions, e.g. obtained by leaching
C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
13.
PROCESS FOR THE RECOVERY OF LITHIUM FROM LITHIUM BEARING MICA RICH MINERALS
A process for the recovery of lithium from lithium bearing mica rich minerals, the process comprising passing an ore (1) containing one or more lithium bearing mica rich minerals to at least one pre-treatment step (50), passing the pre-treated ore to an acid leach step (60) thereby producing a pregnant leach solution, subjecting the pregnant leach solution to a series of process steps (80, 140, 160, 180, 200) in which one or more impurity metals are removed, and recovering lithium as a lithium containing salt product (44).
A process for the recovery of lithium from lithium bearing mica rich minerals, the process comprising passing an ore (1) containing one or more lithium bearing mica rich minerals to at least one pre-treatment step (50), passing the pre-treated ore to an acid leach step (60) thereby producing a pregnant leach solution, subjecting the pregnant leach solution to a series of process steps (80, 140, 160, 180, 200) in which one or more impurity metals are removed, and recovering lithium as a lithium containing salt product (44).
