Method for producing high-purity hydrochloric acid
US-2025333304-A1 · Oct 30, 2025 · US
by distillation
by 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 | C01B7/0712 |
| Official title | {by distillation} |
| Display label | by distillation |
| Total patents | 36 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 7 |
| 2019 | 8 |
| 2020 | 4 |
| 2022 | 5 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Production method for high-purity hydrogen chloride gas
US-12312247-B2 · May 27, 2025 · US
Method for isocyanate and polyurethane production with improved sustainability
US-12291595-B2 · May 6, 2025 · US
Method of separating phosgene and hydrogen chloride
US-2024300817-A1 · Sep 12, 2024 · US
HCL recovery unit
US-11802046-B2 · Oct 31, 2023 · US
High pressure desorption of hydrogen chloride gas
US-2023331551-A1 · Oct 19, 2023 · US
Production method for high-purity hydrogen chloride gas
US-2022411265-A1 · Dec 29, 2022 · US
Method for isocyanate and polyurethane production with improved sustainability
US-2022389150-A1 · Dec 8, 2022 · US
Hcl recovery unit
US-2022194790-A1 · Jun 23, 2022 · US
Process for purifying a contaminated hydrochloric acid composition
US-11352255-B2 · Jun 7, 2022 · US
Method and a system for separating and treating impurities from a hydrogen chloride liquid mixture
US-11267703-B2 · Mar 8, 2022 · US
Process for providing hydrogen chloride for chemical reactions
US-10815193-B2 · Oct 27, 2020 · US
Method for separating materials by means of an extractive distillation process
US-10793494-B2 · Oct 6, 2020 · US
Method for producing hydrogen chloride
US-10611636-B2 · Apr 7, 2020 · US
Hydrogen gas recovery system and hydrogen gas separation and recovery method
US-10611635-B2 · Apr 7, 2020 · US
Method and installation for concentrating aqueous hydrogen halide solutions
US-10494258-B2 · Dec 3, 2019 · US
Process for Purifying a Contaminated Hydrochloric Acid Composition
US-2019345032-A1 · Nov 14, 2019 · US
A method and a system for separating and treating impurities from a hydrogen chloride liquid mixture
US-2019194018-A1 · Jun 27, 2019 · US
Separation of a phosgene- and hydrogen chloride-comprising stream
US-10252912-B2 · Apr 9, 2019 · US
Process for the Recovery of Hydrochloric Acid
US-2019092636-A1 · Mar 28, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B7/0712?
- CPC C01B7/0712 is the Cooperative Patent Classification code for “by distillation.”
- How many patents are filed under CPC C01B7/0712 (by distillation)?
- Our database includes 36 publications tagged with this CPC code.
- Is patent activity under CPC C01B7/0712 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).