No. The salt mixture, insoluble residue of the tetrahydrofuran, and tetrahydrofuran-soluble salts were analyzed by inductively coupled plasma. This invention is an improvement over the prior art in providing for an inexpensive, rapid, efficient method for the separation of lithium chloride from calcium chloride. Anionic Polymerization of Polar Vinyl Monomers. In the examples, parts are by weight unless otherwise indicated. Dual influence of lithium chloride on the anionic propagation of polystyryllithium in ethereal solvents. It is a further object of this invention to provide a simple, inexpensive, efficient method of extracting lithium from brines. Address: 2200 Smithtown Avenue, Room 1 Ronkonkoma, NY 11779-7329 USA, For product inquiries, please use our online system or send an email to Lithium may also be absorbed via the lungs. © 2004-2020 FreePatentsOnline.com. Kahveci, Y. Yagci, A. Avgeropoulos, C. Tsitsilianis. 4,307,066 to Davidson teaches a process for extraction of lithium or calcium from a mixture of metal oxides and silicates by reacting the mixture with a chlorinating agent comprising a gaseous H2 O-HCl mixture at a temperature of 300°-1200° C. and subsequently water leaching the metal chlorides from the resulting mixture. Shop a large selection of Organic metal salts products and learn more about Isopropylmagnesium chloride - Lithium chloride complex, 1.3M solution in THF, AcroSeal , ACROS This invention provides a novel process for recovering substantially pure lithium chloride from calcium-containing solutions. Therefore, it is not necessary to dry the lithium chloride-calcium chloride salt mixture at high temperatures to drive off the waters of hydration before performing the method of the invention. It is therefore difficult to dissolve one while leaving the other undissolved. also discloses a process for purification of lithium chloride using an isopropanol extraction. In satisfaction of the foregoing objects, the present invention provides a method for recovering substantially pure lithium chloride from lithium chloride-calcium chloride salt mixtures comprising the steps of: preferentially dissolving the lithium chloride from the lithium chloride-calcium chloride mixture in tetrahydrofuran, so that the calcium chloride remains undissolved, separating the insoluble calcium chloride from the tetrahydrofuran, and evaporating the tetrahydrofuran to recover the lithium chloride. U.S. Pat. LiCl in THF and the Influence of LiCl on the Schlenk-Equilibrium. Any separation method which allows separation of a solid residue can be used. However, it is to be understood that the invention is inclusive of other operative halides. Recently, Def-fieux and coworkers13 described the reactions of ... solubility of lithium chloride in benzene solution. Generally, the process provides for drying the lithium chloride-calcium chloride-containing solution to obtain a dry lithium chloride-calcium chloride residue, preferentially dissolving the lithium chloride from this residue in tetrahydrofuran (THF), removing the insoluble calcium chloride from the tetrahydrofuran solution, and evaporating the tetrahydrofuran to recover the substantially pure solid lithium chloride. in THF Metal residue (mg) (mg) (mg/l). 4,271,131 to Brown et al. Polymeric Materials – Well Defined Block Copolymers. This process has the disadvantage that only a limited amount of the brine can be processed at any one time. Computational Studies of Ion-Pair Separation of Benzylic Organolithium Compounds in THF: Importance of Explicit and Implicit Solvation. The process consists of subjecting the brine to a first solar evaporation step to concentrate the brine and precipitate sodium and potassium chlorides, adding slaked lime to the brine during the first evaporation step to precipitate magnesium, subsequently adding slaked lime and calcium chloride to precipitate sulfate as calcium sulfate dihydrate, separating the precipitated calcium sulfate dihydrate from the brine, subjecting the brine to a second solar evaporation to further concentrate lithium chloride and to precipitate magnesium hydroxide, calcium sulfate dihydrate and calcium borate hydrate, heating the concentrated brine to a temperature above 101° C. to remove the remaining water, heating the remaining salts to a temperature above 200° C., cooling the salts, and extracting the lithium chloride with isopropanol. & Terms of Use. While lime is the preferred base used to raise the pH, any base can be used, such as a compound of an alkali or alkaline earth metal, especially the hydroxides and oxides. The solution was spray dried at 182° C. and 10 g of the dried salts were contacted with 100 ml of tetrahydrofuran. Low toxicity. 2. A test was conducted to determine the effect of hydration on the solubility of lithium chloride and calcium chloride in tetrahydrofuran. Tetrahydrofuran is a solvent of this type. (3) The resultant mixed chlorides remaining in solutions are then dried and crushed to a fine mesh powder. The lithium to calcium ratio in the tetrahydrofuran was the same as obtained when the salt mixture was dried at 182° C., as in Example III. https://doi.org/10.1021/acs.macromol.8b01458, https://doi.org/10.1016/j.polymer.2020.122997, https://doi.org/10.1016/B978-0-12-803581-8.01447-8, https://doi.org/10.1016/B978-0-444-53349-4.00078-9, https://doi.org/10.1016/B978-0-444-53349-4.00171-0, https://doi.org/10.1002/9783527631421.ch2, https://doi.org/10.1007/978-90-481-3034-4_6, https://doi.org/10.1016/j.progpolymsci.2006.09.001, https://doi.org/10.1016/j.polymer.2005.11.026, https://doi.org/10.1016/j.inoche.2005.01.019, https://doi.org/10.1016/S0032-3861(03)00730-4, https://doi.org/10.1016/S0032-3861(02)00437-8, https://doi.org/10.1016/S0032-3861(02)00463-9. The purification step rejected 92% of the calcium and recovered 93% of the lithium. Alexander Yakimansky, Guoming Wang, Kristof Janssens, Marcel Van Beylen. Tetrahydrofuran is a solvent of this type. teaches a process for removing lithium from aqueous brines comprising contacting the brine with an anion exchange resin so that the lithium is adsorbed onto the resin, and eluting the lithium from the resin by contacting it with an aqueous wash liquor.

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