C01B 15/023
By the alkyl-anthraquinone process
Official title: by the alkyl-anthraquinone process
C01B15/023 (By the alkyl-anthraquinone process) appears on 134 US grants and 82 published applications in this corpus.
Search patents in C01B- Granted patents
- 134
- Published applications
- 82
- Assignees
- 72
- Inventors
- 297
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 2 |
| 2002 | 8 | 8 |
| 2003 | 3 | 5 |
| 2004 | 4 | 4 |
| 2005 | 4 | 3 |
| 2006 | 3 | 1 |
| 2007 | 3 | 4 |
| 2008 | 2 | 6 |
| 2009 | 2 | 3 |
| 2010 | 3 | 4 |
| 2011 | 2 | 1 |
| 2012 | 1 | 3 |
| 2013 | 1 | 0 |
| 2014 | 3 | 4 |
| 2015 | 1 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 2 |
| 2018 | 3 | 2 |
| 2019 | 1 | 2 |
| 2020 | 2 | 0 |
| 2021 | 2 | 4 |
| 2022 | 0 | 4 |
| 2023 | 1 | 4 |
| 2024 | 3 | 8 |
| 2025 | 3 | 4 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system for preparing hydrogen peroxide22 Sep 2026US 12,741,870 B2China Petroleum & Chemical Corporation
- Catalyst for hydrogen peroxide synthesis and regeneration25 Aug 2026US 12,714,987 B2Heesung Catalysts Corporation
- Process for preparing 1,2-propanediol from propane4 Nov 2025US 12,459,882 B2Evonik Operations GmbH
- Method for separating 2-alkylanthracenes and use thereof for producing hydrogen peroxide19 Aug 2025US 12,391,633 B2China Petroleum & Chemical Corporation
- Catalyst for synthesis of hydrogen peroxide and recovery, and method of preparing same13 May 2025US 12,296,326 B2Heesung Catalysts Corporation
- Method for producing hydrogen peroxide23 Oct 2025US 2025/0326639 A1Arkema France
- Calcination apparatus and processes with improved co2 capture9 Oct 2025US 2025/0313508 A1The University of Adelaide
- Novel Process for the Production of Hydrogen Peroxide20 Feb 2025US 2025/0059037 A1Solvay SA
- Reactivation of a hydrogenation catalyst23 Jan 2025US 2025/0025867 A1Arkema France
- Working solution for producing hydrogen peroxide through anthraquinone process and solvent system thereof26 Dec 2024US 2024/0425371 A1China Petroleum & Chemical Corporation
Most cited
By later US patents
- Method of separating catalyst-free working solution from the hydrogenation cycle of the anthraquinone method for the production of hydrogen peroxide74US 5,534,149 ADegussa AG · 1996
- Bubble column and the use thereof50US 6,375,921 B1Degussa-Huls AG · 2002
- Regeneration of used supported noble metal catalysts50US 6,740,615 B2Hydrocarbon Technologies, Inc. · 2004
- Chemical product and process29US 6,787,497 B2Akzo Nobel N. V. · 2004
- Direct manufacturing method of hydrogen peroxide24US 5,972,305 AKorea Research Institute of Chemical Technology · 1999