Preparation method of lithium difluoroborate
A technology of lithium difluorooxalate borate and lithium tetrafluoroborate is applied in chemical instruments and methods, compounds containing elements of Group 3/13 of the periodic table, organic chemistry, etc., and can solve problems such as poor quality of lithium difluorooxalate borate , to achieve the effect of improving the purity, reducing the production cost, and the preparation process is simple and safe.
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Embodiment 1
[0024]The preparation process of lithium boric acid acid salted acid salted acid isfigure 1 As shown, specifically includes the following steps:
[0025](1) in 1#In the reactor, 36.1 g of lithium fluoride (1.39 mol) was reactive with 556 g of hydrogen fluoride (27.8 mol) at a temperature of -40 to -30 ° C for 4 h, and the hydrogen fluoride solution of lithium fluoride was degraded.
[0026](2) Enter the fluoride solution of fluoride into 2#In the reactor, it was uniformly stirred, and 62.5 g of anhydrous ethaffin (0.694 mol) was added to the reactor, and 162.5 g of trichloride gas (1.39 mol) was slowly delivered from the bottom of the reactor (uniform and continuous access. The time is 2 h); the reaction temperature is controlled between 15 to 20 ° C during the addition of the addition; during the reaction, the resulting exhaust gas is discharged from the top of the reactor to absorb and remove hydrochloric acid having a concentration of 20% after hydrogen fluoride. 780G;
[0027](3) After t...
Embodiment 2
[0030]The preparation method of lithium boric acid acid salted acid, including the following steps:
[0031](1) in 1#In the reactor, 200 kg of fluorinated lithium fluoride (7.72 kmol) was 0.2 h at a temperature of 1540 kg of no hydrogen fluoride (77 kmol) at -20 to 0 ° C, and the hydrogen fluoride solution of lithium fluoride was obtained.
[0032](2) Put the hydrofluoric acid solution of lithium fluoride into 2#In the reactor, the stirring was mixed, 346 kg of anhydrous ethaffin (3.8 kmol) was added, and 1080 kg of a boron tap gas (9.2 kmol) was passed from the bottom of the reactor (uniform and continuous access, the entry time was 3 h); the feed process The control reaction temperature is between 5 to 15 ° C; during the reaction, the resulting gas is discharged from the top of the reactor to absorb the two-stage refinement film and remove hydrogen fluoride. 3710 kg;
[0033](3) After the endo-boron gas is processed, the mixture is continued for 30 min to complete the reaction, then the re...
Embodiment 3
[0037]The preparation method of lithium boric acid acid salted acid, including the following steps:
[0038](1) in 1#In the reactor, 1000 kg of lithium fluoride (38.6 kmol) was reactive with 3080 kg of no hydrogen fluoride (154 kmol) at 10 to 20 ° C for 2 h, and the fluoride solution of lithium fluoride was degraded.
[0039](2) Enter the fluoride solution of fluoride into 2#In the reactor, the stirring was mixed, and 1900 kg of anhydrous oxycidal acid (21.1 kmol) was added, and 6753 kg of a boron tantramid (57.6 kmol) was transferred from the bottom of the reactor (uniformly continuous access, the access time was 4 h); The control reaction temperature is between 5 and 10 ° C; during the reaction, the resulting gas is discharged from the top of the reactor to absorb and remove hydrogen hydrogen acid after hydrogen fluoride. 18450 kg;
[0040](3) After the completion of trichloride gas is formed, stirring is continued for 30 min to complete the reaction, and then the reaction liquid is filter...
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