Processes and cataylsts for the selective hydrogenation of compounds having carbonyl carbon atoms
US-2024368100-A1 · Nov 7, 2024 · US
Extractive distillation
Extractive distillation · 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 | B01D3/40 |
| Official title | Extractive distillation |
| Display label | Extractive distillation |
| Total patents | 324 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 23 |
| 2016 | 26 |
| 2017 | 18 |
| 2018 | 31 |
| 2019 | 42 |
| 2020 | 39 |
| 2021 | 34 |
| 2022 | 22 |
| 2023 | 30 |
| 2024 | 34 |
| 2025 | 16 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for the separation of ethylbenzene
US-2017240490-A1 · Aug 24, 2017 · US
Process for high purity hexane and production thereof
US-2017203231-A1 · Jul 20, 2017 · US
Flexible butadiene extraction process
US-2017204026-A1 · Jul 20, 2017 · US
Furan-2,5-dicarboxylic acid purge process
US-2017157530-A1 · Jun 8, 2017 · US
Column with separative installations for separating a mixture of hydrocarbons and/or hydrocarbon derivatives by means of an extractive distillation using a selective solvent
US-2017158583-A1 · Jun 8, 2017 · US
Extraction column and process for extracting a constituent from a fluid
US-9643910-B2 · May 9, 2017 · US
Flexible butadiene extraction process
US-9611195-B2 · Apr 4, 2017 · US
Upgrading a c5 olefin stream
US-2017081260-A1 · Mar 23, 2017 · US
Alkylene oxide separation systems, methods, and apparatuses
US-9593090-B2 · Mar 14, 2017 · US
Process and Apparatus for Recovering Aromatic Hydrocarbons
US-2017029348-A1 · Feb 2, 2017 · US
Recovery of ethylene from methanol to olefins process
US-2016362352-A1 · Dec 15, 2016 · US
Process for the treatment of liquefied hydrocarbons using 3-(piperazine-1-YL)propane-1,2-diol compounds
US-9518240-B2 · Dec 13, 2016 · US
Process to control HI concentration in residuum stream
US-9512056-B2 · Dec 6, 2016 · US
Process to control HI concentration in residuum stream
US-9505695-B2 · Nov 29, 2016 · US
Butadiene extraction pre-absorber
US-2016311733-A1 · Oct 27, 2016 · US
Selective olefin extraction
US-2016303489-A1 · Oct 20, 2016 · US
Process for producing phenol and cyclohexanone
US-9464020-B2 · Oct 11, 2016 · US
Process for simultaneous production of benzene lean gasoline and high purity benzene from cracked gasoline fraction
US-2016288014-A1 · Oct 6, 2016 · US
Regeneration of selective solvents for extractive processes
US-9440947-B2 · Sep 13, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D3/40?
- CPC B01D3/40 is the Cooperative Patent Classification code for “Extractive distillation.”
- How many patents are filed under CPC B01D3/40 (Extractive distillation)?
- Our database includes 324 publications tagged with this CPC code.
- Is patent activity under CPC B01D3/40 growing?
- Publication counts under this code: 34 in 2024 vs 16 in 2025 (latest complete years).