Impurity removal from an intermediate product obtained from Ca/Na/Li hypochlorite delithiation process
AssigneeBASF SE
InventorsTinoush Dinn, Dieter G. Von Deak, William C. Mays, Martin Lawrence Panchula
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Abstract
Disclosed is a process for removing impurities from an intermediate product in battery material production including a) contacting a first intermediate product with a first aqueous medium to obtain a second intermediate product; and b) contacting the second intermediate product with a stream of a second aqueous medium until a conductivity of the stream of the second aqueous medium after contacting the second intermediate product is below about 1,000 micro-Siemens per centimeter (μS/cm).
Claims17
A process for removing impurities from an intermediate product in battery material production, the process comprising:
- a) contacting a first intermediate product with a first aqueous medium to obtain a second intermediate product;
- the amount of the first aqueous medium has a mass from about 0.1 to 15 times the mass of the first intermediate product;
- b) contacting the second intermediate product with a stream of a second aqueous medium until a conductivity of the stream of the second aqueous medium after contacting the second intermediate product is below about 1,000 micro-Siemens per centimeter (μS/cm), to form a washed intermediate product;
- wherein the first intermediate product is obtained from a Ca/Na/Li hypochlorite delithiation process;
- wherein, the impurities comprise mono or multi-valent ions including calcium, magnesium, sodium, chloride, chlorite, and/or chlorate;
- and
- wherein the battery material comprises KyLixNizO2 wherein y ranges from 0 to 0.3, x ranges from 0 to 0.2, z ranges from 0.1 to 1, and x+y ranges from about 0 to less than 0.5.
Dependencies are inferred from the claim text.