C01B 17/92
Recovery from acid tar or the like
Official title: Recovery from acid tar or the like {, e.g. alkylation acids (obtaining sulfur dioxide as an intermediate in sulfur trioxode recovery therefrom C01B17/58)}
C01B17/92 (Recovery from acid tar or the like) appears on 22 US grants and 11 published applications in this corpus.
Search patents in C01B- Granted patents
- 22
- Published applications
- 11
- Assignees
- 17
- Inventors
- 62
- Latest grant
- 14 Jan 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method for production of sulfuric acid from sulfur containing feeds with gas quenching14 Jan 2020US 10,532,930 B2Haldor Topsoe A/S
- Method for the manufacture of an ammonium sulfate composition30 Jul 2013US 8,496,905 B2Nutrinova Nutrition Specialties & Food Ingredients GmbH
- Extraction of ASO from spent sulfuric acid using liquid SO227 Dec 2011US 8,084,661 B2Catalytic Distillation Technologies
- Acid tolerant polymeric membrane and process for the recovery of acid using polymeric membranes16 Aug 2011US 7,997,426 B2ExxonMobil Research and Engineering Company
- Acid tolerant polymeric membrane and process for the recovery of acid using polymeric membranes23 Nov 2010US 7,837,880 B2ExxonMobil Research and Engineering Company
- Method for production of sulfuric acid from sulfur containing feeds with gas quenching10 Oct 2019US 2019/0308879 A1Haldor TopsøE A/S
- Method for the Manufacture of an Ammonium Sulfate Composition14 Mar 2013US 2013/0064755 A1Nutrinova Nutrition Specialties & Food Ingredients GmbH
- Extraction of aso from spent sulfuric acid using liquid so217 Jun 2010US 2010/0152517 A1Catalytic Distillation Technologies
- Decomposition of spent sulfuric acid using oxygen24 Dec 2009US 2009/0317321 A1
- Acid tolerant polymeric membrane and process for the recovery of acid using polymeric membranes29 Nov 2007US 2007/0272613 A1ExxonMobil Research and Engineering Company
Most cited
By later US patents
- Method of separation of sugars and concentrated sulfuric acid39US 4,608,245 A1986
- Method for fluidizing tars28US 6,197,837 B1Rhodia Inc. · 2001
- Method for the manufacture of an ammonium sulfate composition25US 8,496,905 B2Nutrinova Nutrition Specialties & Food Ingredients GmbH · 2013
- Process for the recovery of sulfuric acid16US 4,440,734 AGouvernement du Quebec · 1984
- Alkylation fluosulfonic-sulfuric acid catalyst recovery process with silica-alumina removal of fluoride compounds9US 4,033,899 ATexaco Inc. · 1977