C01B 7/0712
By distillation
Official title: {by distillation}
C01B7/0712 (By distillation) appears on 70 US grants and 57 published applications in this corpus.
Search patents in C01B- Granted patents
- 70
- Published applications
- 57
- Assignees
- 50
- Inventors
- 173
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 2 |
| 2002 | 3 | 4 |
| 2003 | 2 | 2 |
| 2004 | 0 | 0 |
| 2005 | 2 | 0 |
| 2006 | 0 | 3 |
| 2007 | 2 | 4 |
| 2008 | 1 | 1 |
| 2009 | 1 | 2 |
| 2010 | 0 | 1 |
| 2011 | 0 | 5 |
| 2012 | 0 | 3 |
| 2013 | 2 | 4 |
| 2014 | 5 | 4 |
| 2015 | 0 | 3 |
| 2016 | 2 | 1 |
| 2017 | 3 | 1 |
| 2018 | 2 | 6 |
| 2019 | 3 | 5 |
| 2020 | 6 | 0 |
| 2021 | 0 | 1 |
| 2022 | 2 | 2 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of separating phosgene and hydrogen chloride23 Jun 2026US 12,662,376 B2BASF SE
- Production method for high-purity hydrogen chloride gas27 May 2025US 12,312,247 B2Tokuyama Corporation
- HCL recovery unit31 Oct 2023US 11,802,046 B2Sgl Carbon SE
- Process for purifying a contaminated hydrochloric acid composition7 Jun 2022US 11,352,255 B2Avantium Knowledge Centre B.V.
- Method and a system for separating and treating impurities from a hydrogen chloride liquid mixture8 Mar 2022US 11,267,703 B2Covestro Deutschland AG
- Method for producing high-purity hydrochloric acid30 Oct 2025US 2025/0333304 A1Tokuyama Corporation
- Method of separating phosgene and hydrogen chloride12 Sep 2024US 2024/0300817 A1BASF SE
- High pressure desorption of hydrogen chloride gas19 Oct 2023US 2023/0331551 A1Sgl Carbon SE
- Production method for high-purity hydrogen chloride gas29 Dec 2022US 2022/0411265 A1Tokuyama Corporation
- Hcl recovery unit23 Jun 2022US 2022/0194790 A1Sgl Carbon SE
Most cited
By later US patents
- Separation of a substance mixture consisting of hydrogen chloride and phosgene38US 7,584,629 B2BASF SE · 2009
- Process for purifying crude gaseous hydrogen chloride31US 4,935,220 AWacker Chemie AG · 1990
- Process for recovery of anhydrous hydrogen chloride from mixtures with non-condensable gases29US 5,693,191 AThe Dow Chemical Company · 1997
- Point-of-use ammonia purification for electronic component manufacture28US 5,496,778 AStartec Ventures, Inc. · 1996
- On-site generation of ultra-high-purity buffered-HF for semiconductor processing28US 5,722,442 AStartec Ventures, Inc. · 1998