Aldehyde removal process for methanol carbonylation
US-2025066281-A1 · Feb 27, 2025 · US
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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 | C07C45/84 |
| Official title | by azeotropic distillation |
| Display label | by azeotropic distillation |
| Total patents | 24 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 6 |
| 2020 | 4 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Aldehyde removal process for methanol carbonylation
US-12162830-B2 · Dec 10, 2024 · US
Process for preparing methacrolein from formaldehyde and propionaldehyde and preparation plant for the purpose
US-11680033-B2 · Jun 20, 2023 · US
Process for preparing methacrolein from formaldehyde and propionaldehyde and preparation plant for the purpose
US-2022298094-A1 · Sep 22, 2022 · US
Aldehyde removal process for methanol carbonylation
US-2022185760-A1 · Jun 16, 2022 · US
Thermally integrated distillation systems and processes using the same
US-10835837-B2 · Nov 17, 2020 · US
Azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF3I) and hexafluoroacetone (HFA)
US-10662135-B2 · May 26, 2020 · US
Azeotrope or azeotrope-like compositions of trifluoroiodomethane (cf3i) and hexafluoroacetone (hfa)
US-2020115305-A1 · Apr 16, 2020 · US
Method for purifying phenol
US-10532968-B2 · Jan 14, 2020 · US
Distillation device
US-10486080-B2 · Nov 26, 2019 · US
Thermally integrated distillation systems and processes using the same
US-10399004-B2 · Sep 3, 2019 · US
Method for producing hydroxypivalaldehyde
US-10392335-B2 · Aug 27, 2019 · US
Thermally integrated distillation systems and processes using the same
US-2019247766-A1 · Aug 15, 2019 · US
Method for purifying phenol
US-2019023634-A1 · Jan 24, 2019 · US
Method for producing hydroxypivalaldehyde
US-2019023638-A1 · Jan 24, 2019 · US
Method of recovering 1,3-butadiene and methylethylketone from dehydration products of 2,3-butanediol
US-10040733-B2 · Aug 7, 2018 · US
Distallation device (amended)
US-2018169542-A1 · Jun 21, 2018 · US
Thermally integrated distillation systems and processes using the same
US-2018065061-A1 · Mar 8, 2018 · US
Distillation device
US-2017225100-A1 · Aug 10, 2017 · US
Method for producing methacrolein and the conditioning/draining thereof for direct oxidative esterification
US-9580374-B2 · Feb 28, 2017 · US