Processes for recovering lithium values from lithium-containing brines
US-12570537-B2 · Mar 10, 2026 · US
Fractional crystallisation; Fractionating or rectifying columns
Fractional crystallisation; Fractionating or rectifying columns · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D9/004 |
| Official title | {Fractional crystallisation; Fractionating or rectifying columns} |
| Display label | Fractional crystallisation; Fractionating or rectifying columns |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 4 |
| 2020 | 9 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process and apparatus for preparing purified styrene composition using divided-wall column and crystallization unit
US-12338215-B2 · Jun 24, 2025 · US
Processes for recovering lithium values from lithium-containing brines
US-2024375972-A1 · Nov 14, 2024 · US
Selective precipitation of solutes from aqueous solutions and related systems
US-2024270612-A1 · Aug 15, 2024 · US
Process and method for refining lithium carbonate starting from an impure lithium chloride solution
US-12054807-B2 · Aug 6, 2024 · US
Purification apparatus
US-2024252951-A1 · Aug 1, 2024 · US
Method for purifying compound
US-2024010599-A1 · Jan 11, 2024 · US
Switchable system for high-salinity brine desalination and fractional precipitation
US-11840462-B2 · Dec 12, 2023 · US
Process and apparatus for preparing purified styrene composition using divided-wall column and crystallization unit
US-2023365480-A1 · Nov 16, 2023 · US
External circulating slurry reactive crystallizer
US-11738285-B2 · Aug 29, 2023 · US
Deoiling process
US-2023014244-A1 · Jan 19, 2023 · US
External circulating slurry reactive crystallizer
US-2022379236-A1 · Dec 1, 2022 · US
Switchable System for High-Salinity Brine Desalination and Fractional Precipitation
US-2022212957-A1 · Jul 7, 2022 · US
Process and method for refining lithium carbonate starting from an impure lithium chloride solution
US-2021180153-A1 · Jun 17, 2021 · US
Method for treating lignocellulosic materials
US-11028455-B2 · Jun 8, 2021 · US
Semi-continuous crystallization method and apparatus
US-10981844-B2 · Apr 20, 2021 · US
Method for purifying an amino acid-n-carboxy anhydride
US-10975042-B2 · Apr 13, 2021 · US
Process for purifying (meth)acrylic acid including a dividing-wall distillation column
US-10815182-B2 · Oct 27, 2020 · US
Method and apparatus for purifying a mixture comprising oil and wax
US-10738248-B2 · Aug 11, 2020 · US
Process for enriching enantiomers from an enantiomer mixture
US-10669222-B2 · Jun 2, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D9/004?
- CPC B01D9/004 is the Cooperative Patent Classification code for “Fractional crystallisation; Fractionating or rectifying columns.”
- How many patents are filed under CPC B01D9/004 (Fractional crystallisation; Fractionating or rectifying columns)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC B01D9/004 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).