Process for the preparation of lithium hexafluoroarsenate
AssigneeCouncil of Scientific and Industrial Research
InventorsSubramanian Angaiah, Vasudevan Thiagarajan, Gnagadharan Ramaiyer, Raghavan Meenakshisundaram
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Abstract
The present invention provides a novel thermal solid state method for the synthesis of lithium hexfluoroarsenate either in a two step or a single step method, preferably at last substantially in the solid state.
Claims17
A process for the preparation of lithium hexafluoro arsenate comprising contacting arsenous trioxide with a lithium source and ammonium fluoride, all being in solid state and heating to obtain lithium hexafluoro arsenate.
A process for the preparation of lithium hexafluoroarsenate comprising mixing a lithium source with arsenous trioxide (As2O3) and ammonium fluoride in a ratio of 1:1:6-9, heating the resulting solid mixture in an electric furnace at a temperature in the range of 150-300° C. for 4 hours to obtain the lithium hexafluoroarsenate product.
A process for the preparation of lithium hexafluoroarsenate comprising first mixing a lithium source with arsenous trioxide in equimolar proportions and heating slowly in an electric furnace initially to 100° C. and then continuously for 4 hours at a temperature in the range of 200-300° C. to obtain lithium meta arsenate (LiAsO2), and secondly reacting the lithium metaarsenate product with ammonium fluoride for about 4 hours to obtain lithium hexafluoro arsenate.
Dependencies are inferred from the claim text.