C01B 7/04
Preparation of chlorine from hydrogen chloride
C01B7/04 (Preparation of chlorine from hydrogen chloride) appears on 101 US grants and 156 published applications in this corpus.
Search patents in C01B- Granted patents
- 101
- Published applications
- 156
- Assignees
- 51
- Inventors
- 326
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 7 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 2 |
| 2003 | 0 | 0 |
| 2004 | 1 | 5 |
| 2005 | 4 | 3 |
| 2006 | 0 | 4 |
| 2007 | 0 | 14 |
| 2008 | 0 | 15 |
| 2009 | 0 | 10 |
| 2010 | 7 | 14 |
| 2011 | 3 | 15 |
| 2012 | 10 | 18 |
| 2013 | 0 | 5 |
| 2014 | 4 | 4 |
| 2015 | 7 | 6 |
| 2016 | 5 | 2 |
| 2017 | 1 | 4 |
| 2018 | 2 | 2 |
| 2019 | 3 | 7 |
| 2020 | 3 | 0 |
| 2021 | 5 | 2 |
| 2022 | 1 | 4 |
| 2023 | 0 | 5 |
| 2024 | 0 | 7 |
| 2025 | 5 | 5 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for preparation of chlorine from hydrogen chloride31 Mar 2026US 12,589,996 B2The Regents of the University of California
- Molding catalyst for hydrogen chloride oxidation reaction, and method for producing same18 Nov 2025US 12,472,486 B2Hanwha Solutions Corporation
- Systems and methods for producing alkali hydroxides and sulfuric acid or hydrochloric acid22 Jul 2025US 12,365,597 B1Innovator Energy, LLC
- Method for manufacturing ruthenium oxide-supported catalyst for preparing chlorine and catalyst manufactured thereby20 May 2025US 12,303,872 B2Hanwha Solutions Corporation
- Method for isocyanate and polyurethane production with improved sustainability6 May 2025US 12,291,595 B2Covestro Intellectual Property GmbH & Co.KG
- Systems and methods for producing alkali hydroxides and sulfuric acid or hydrochloric acid11 Jun 2026US 2026/0159405 A1Innovator Energy, LLC
- Molding catalyst for hydrogen chloride oxidation reaction, and method for producing same5 Feb 2026US 2026/0034537 A1Hanwha Solutions Corporation
- Heat medium storage apparatus11 Sep 2025US 2025/0283669 A1Sumitomo Chemical Company, Limited
- Systems and methods for producing alkali hydroxides and sulfuric acid or hydrochloric acid24 Jul 2025US 2025/0236531 A1Innovator Energy, LLC
- Hydrogen chloride oxidation reaction catalyst for preparing chlorine, and preparation method terefor19 Jun 2025US 2025/0196106 A1Hanwha Solutions Corporation
Most cited
By later US patents
- Monomodal and polymodal catalyst supports and catalysts having narrow pore size distributions and their production129US 5,935,897 ABASF SE · 1999
- Process for producing diaryl carbonate34US 6,348,613 B2Mitsubishi Chemical Corporation · 2002
- Production process of chlorine24US 4,774,070 AMitsui Toatsu Chemicals, Inc. · 1988
- Process for producing chlorine22US 5,908,607 ASumitomo Chemical Company, Limited · 1999
- Band guiding arch for strapping machine17US 4,781,110 AStrapack Corporation · 1988