Method for separating propylene carbonate in preparing process of polyether carbonate polyol
US-10822324-B2 · Nov 3, 2020 · US
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by extraction
by extraction · 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 | C07C27/34 |
| Official title | by extraction |
| Display label | by extraction |
| Total patents | 9 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears to be growing based on the most recent years.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2018 | 3 |
| 2019 | 1 |
| 2020 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of preparing bio-polyols from epoxidized fatty acid esters
US-10766841-B2 · Sep 8, 2020 · US
Recovery process for functionalized compound reaction product
US-10654790-B2 · May 19, 2020 · US
Method of Preparing Bio-Polyols from Epoxidized Fatty Acid Esters
US-2020148614-A1 · May 14, 2020 · US
Method for Separating Propylene Carbonate in Preparing Process of Polyether Carbonate Polyol
US-2019315706-A1 · Oct 17, 2019 · US
Process for removal of sulphur from raw methanol
US-10160706-B2 · Dec 25, 2018 · US
Method of recovering absorption solvent in butadiene production process by oxidative dehydrogenation
US-9919260-B2 · Mar 20, 2018 · US
Recovery process for functionalized compound reaction product
US-2018037532-A1 · Feb 8, 2018 · US
Method of recovering absorption solvent in butadiene production process by oxidative dehydrogenation
US-2016256815-A1 · Sep 8, 2016 · US