C01D 5/12
Preparation of double sulfates of magnesium with sodium or potassium
C01D5/12 (Preparation of double sulfates of magnesium with sodium or potassium) appears on 14 US grants and 12 published applications in this corpus.
Search patents in C01D- Granted patents
- 14
- Published applications
- 12
- Assignees
- 14
- Inventors
- 40
- Latest grant
- 29 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 2 |
| 2020 | 1 | 3 |
| 2021 | 2 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for production of potassium sulfate, ammonium sulfate, and calcium carbonate from syngenite29 Apr 2025US 12,286,358 B2Upcycle Minerals Inc.
- Process for the production of potassium sulphate and magnesium sulphate from carnallite and sodium sulphate19 Apr 2022US 11,306,033 B2Dead Sea Works Ltd.
- Potassium magnesium fertilizer1 Jun 2021US 11,021,411 B2KSM, Inc.
- Systems and methods of producing potassium sulfate23 Mar 2021US 10,954,133 B2Novopro Projects Inc.
- Systems and methods of producing potassium sulfate27 Oct 2020US 10,815,130 B2Novopro Projects Inc.
- Magnesium removal process11 Jul 2024US 2024/0228310 A1Lithium Nevada Corp.
- Process for Production of Potassium Sulfate, Ammonium Sulfate, and Calcium Carbonate from Syngenite27 Oct 2022US 2022/0340437 A1Upcycle Minerals Inc.
- Systems and methods of producing potassium sulfate10 Dec 2020US 2020/0385279 A1Novopro Projects Inc.
- Systems and methods of producing potassium sulfate1 Oct 2020US 2020/0308013 A1Novopro Projects Inc.
- Method for treating a salt solution using multistage separation processes, and treatment system for this purpose26 Mar 2020US 2020/0094265 A1K+S Aktiengesellschaft
Most cited
By later US patents
- Granulation of potash salts21US 4,385,920 AInternational Minerals & Chemical Corp. · 1983
- Process for the manufacture of potassium sulphate by treating solutions containing magnesium chloride and potassium chloride21US 4,533,536 AMines de Potasse d'Alsace S.A. · 1985
- Separation of complex potassium salts from brine evaporites15US 3,967,930 AN L Industries, Inc. · 1976
- Methods of processing solutions of potassium sulfate and magnesium sulfate, methods of producing potassium sulfate, and related systems4US 8,802,048 B2Intercontinental Potash Corp. (USA) · 2014
- Chemical process to produce hydrogen chloride and chloride-free compound potassium sulfate fertilizers or other metal sulfates3US 7,887,776 B22011