Acetonitrile separation process
US-12459887-B2 · Nov 4, 2025 · US
Separation; Purification; Stabilisation; Use of additives
Separation; Purification; Stabilisation; Use of additives · 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 | C07C253/32 |
| Official title | Separation; Purification; Stabilisation; Use of additives |
| Display label | Separation; Purification; Stabilisation; Use of additives |
| Total patents | 54 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 5 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 6 |
| 2021 | 2 |
| 2022 | 9 |
| 2023 | 9 |
| 2024 | 1 |
| 2025 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Abating unwanted emulsion polymerization during extractive distillation of conjugated diene monomers
US-12428360-B2 · Sep 30, 2025 · US
Antifoulant compositions for high-severity processing of vinylic monomer streams
US-2025282698-A1 · Sep 11, 2025 · US
Method of producing acrylonitrile dimer
US-12404234-B2 · Sep 2, 2025 · US
Antifoulant compositions for vapor-space applications
US-2025257154-A1 · Aug 14, 2025 · US
Cosmetic or dermatological composition comprising a merocyanine and a gamma-butyrolactone and/or a gamma-butyrolactam
US-2025235392-A1 · Jul 24, 2025 · US
Antifoulant compositions for high-severity processing of vinylic monomer streams
US-12344581-B2 · Jul 1, 2025 · US
Method of preparing acrylonitrile dimer
US-12319642-B2 · Jun 3, 2025 · US
Antifoulant compositions for vapor-space applications
US-12304980-B2 · May 20, 2025 · US
Cyanoacrylate composition with hazardless stabilizer
US-11891496-B2 · Feb 6, 2024 · US
Method for preparing acrylonitrile dimer
US-11845711-B2 · Dec 19, 2023 · US
Synergistic antifoulant compositions and methods of using the same
US-2023312767-A1 · Oct 5, 2023 · US
Antifoulant compositions for vapor-space applications
US-2023312770-A1 · Oct 5, 2023 · US
Antifoulant compositions for high-severity processing of vinylic monomer streams
US-2023312440-A1 · Oct 5, 2023 · US
Abating unwanted emulsion polymerization during extractive distillation of conjugated diene monomers
US-2023312441-A1 · Oct 5, 2023 · US
Inhibitor of vapor space polymerization
US-2023312477-A1 · Oct 5, 2023 · US
Compositions and methods to inhibit fouling of ammonium salts
US-2023159440-A1 · May 25, 2023 · US
Integrated methods and systems for producing amide and nitrile compounds
US-2023073343-A1 · Mar 9, 2023 · US
Method for preparing acrylonitrile dimer
US-2023057964-A1 · Feb 23, 2023 · US
Integrated methods and systems for producing amide and nitrile compounds
US-11498894-B2 · Nov 15, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C253/32?
- CPC C07C253/32 is the Cooperative Patent Classification code for “Separation; Purification; Stabilisation; Use of additives.”
- How many patents are filed under CPC C07C253/32 (Separation; Purification; Stabilisation; Use of additives)?
- Our database includes 54 publications tagged with this CPC code.
- Is patent activity under CPC C07C253/32 growing?
- Publication counts under this code: 1 in 2024 vs 9 in 2025 (latest complete years).