Method for purifying (hydro)halocarbon by reduced pressure distillation from azeotropic or azeotropic-like composition
US-12448343-B2 · Oct 21, 2025 · US
by azeotropic distillation
by azeotropic distillation · 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 | C07C29/82 |
| Official title | by azeotropic distillation |
| Display label | by azeotropic distillation |
| Total patents | 65 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 7 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 14 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods for purifying a solvent
US-2025320173-A1 · Oct 16, 2025 · US
Method of preparing isopropyl alcohol
US-2024417354-A1 · Dec 19, 2024 · US
Process for the production of glycols
US-2024317659-A2 · Sep 26, 2024 · US
Recovering Mono-ethylene Glycol
US-2024182391-A1 · Jun 6, 2024 · US
Method for extracting alcohols from an initial mixture comprising alcohols in aqueous phase
US-2024174587-A1 · May 30, 2024 · US
Process for producing alcohols
US-2024025828-A1 · Jan 25, 2024 · US
Process for the production of glycols
US-2023365482-A1 · Nov 16, 2023 · US
Methoxypropanols separation including azeotropic distillation
US-2023271909-A1 · Aug 31, 2023 · US
Semiconductor treatment liquid and method for manufacturing same
US-2023121726-A1 · Apr 20, 2023 · US
Method for Producing (Hydro)Halocarbon
US-2023063030-A1 · Mar 2, 2023 · US
Isopropyl alcohol purification method
US-11427522-B2 · Aug 30, 2022 · US
Method for purifying by-product ethylene glycol of polyester in converting plasticizer
US-11180436-B2 · Nov 23, 2021 · US
Process for production of mixed butanol and diisobutenes as fuel blending components
US-11097998-B1 · Aug 24, 2021 · US
Process for recovering alcohols in a fermenter
US-10961489-B2 · Mar 30, 2021 · US
Method for purifying by-product ethylene glycol of polyester in converting plasticizer
US-2021087130-A1 · Mar 25, 2021 · US
Isopropyl alcohol purification method
US-2021061741-A1 · Mar 4, 2021 · US
Thermally integrated distillation systems and processes using the same
US-10835837-B2 · Nov 17, 2020 · US
Method for producing high concentration alcohol
US-10836694-B2 · Nov 17, 2020 · US
Method for obtaining alcohols from aldehydes
US-10577297-B2 · Mar 3, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C29/82?
- CPC C07C29/82 is the Cooperative Patent Classification code for “by azeotropic distillation.”
- How many patents are filed under CPC C07C29/82 (by azeotropic distillation)?
- Our database includes 65 publications tagged with this CPC code.
- Is patent activity under CPC C07C29/82 growing?
- Publication counts under this code: 5 in 2024 vs 7 in 2025 (latest complete years).