Sodium sulfate by-product processing in lithium and battery chemical production
US-12522510-B2 · Jan 13, 2026 · US
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Preparation of sulfates from alkali metal salts and sulfuric acid or bisulfates; Preparation of bisulfates
Preparation of sulfates from alkali metal salts and sulfuric acid or bisulfates; Preparation of bisulfates · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C01D5/02 |
| Official title | Preparation of sulfates from alkali metal salts and sulfuric acid or bisulfates; Preparation of bisulfates |
| Display label | Preparation of sulfates from alkali metal salts and sulfuric acid or bisulfates; Preparation of bisulfates |
| Total patents | 23 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2018 | 5 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Processing hard rock lithium minerals or other materials to produce lithium materials and byproducts converted from a sodium sulfate intermediate product
US-2024425381-A1 · Dec 26, 2024 · US
Process and method for producing crystallized metal sulfates
US-2024409432-A1 · Dec 12, 2024 · US
Process for producing high purity nickel sulfate
US-2024317604-A1 · Sep 26, 2024 · US
Process and method for producing crystallized metal sulfates
US-12054401-B2 · Aug 6, 2024 · US
Method for recycling spent carbon cathode of aluminum electrolysis
US-11697594-B2 · Jul 11, 2023 · US
Method for recycling spent carbon cathode of aluminum electrolysis
US-2023120820-A1 · Apr 20, 2023 · US
Sodium sulfate by-product processing in lithium and battery chemical production
US-2023052881-A1 · Feb 16, 2023 · US
Process and method for producing crystallized metal sulfates
US-2022009793-A1 · Jan 13, 2022 · US
Preparation method for 4-phenylthio-benzenethiol
US-11220478-B2 · Jan 11, 2022 · US
Process for producing crystallized metal sulfates
US-10995014-B1 · May 4, 2021 · US
Preparation method for 4-phenylthio-benzenethiol
US-2021009514-A1 · Jan 14, 2021 · US
Method for preparing high-purity chlorine dioxide by using methanol and hydrogen peroxide as reducing agent
US-2020071166-A1 · Mar 5, 2020 · US
Preparation of high-purity chlorine dioxide
US-2020071165-A1 · Mar 5, 2020 · US
Process for the recovery of sodium sulfate
US-10414667-B2 · Sep 17, 2019 · US
Water solvated glass/amorphous solid ionic conductors
US-2018305216-A1 · Oct 25, 2018 · US
Apparatus for manufacturing potassium compound and method of recovering potassium compound from brine
US-10046302-B2 · Aug 14, 2018 · US
Process for the recovery of sodium sulfate
US-2018222758-A1 · Aug 9, 2018 · US
Water solvated glass/amorphous solid ionic conductors
US-2018127280-A1 · May 10, 2018 · US
Water solvated glass/amorphous solid ionic conductors
US-9890048-B2 · Feb 13, 2018 · US