UST101803I4 - Production of urea-ammonium sulfate suspension fertilizer - Google Patents
Production of urea-ammonium sulfate suspension fertilizer Download PDFInfo
- Publication number
- UST101803I4 UST101803I4 US06/287,399 US28739981A UST101803I4 US T101803 I4 UST101803 I4 US T101803I4 US 28739981 A US28739981 A US 28739981A US T101803 I4 UST101803 I4 US T101803I4
- Authority
- US
- United States
- Prior art keywords
- production
- urea
- ammonium sulfate
- sulfate suspension
- suspension fertilizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
A process for production of highly concentrated nitrogen sulfur suspension fertilizers, with excellent long-term storage and handling properties, from ammonia, sulfuric acid, and urea. Satisfactory operation of the process and production of high-quality suspensions requires the use of a novel cooling procedure. For prevention of scale formation and production of small crystals, the product is cooled in two or more stages with gelling type clay added prior to or during crystallization and with air cooling used in the cooling stage(s) involving crystallization.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/287,399 UST101803I4 (en) | 1981-07-27 | 1981-07-27 | Production of urea-ammonium sulfate suspension fertilizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/287,399 UST101803I4 (en) | 1981-07-27 | 1981-07-27 | Production of urea-ammonium sulfate suspension fertilizer |
Publications (1)
Publication Number | Publication Date |
---|---|
UST101803I4 true UST101803I4 (en) | 1982-05-04 |
Family
ID=23102729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/287,399 Pending UST101803I4 (en) | 1981-07-27 | 1981-07-27 | Production of urea-ammonium sulfate suspension fertilizer |
Country Status (1)
Country | Link |
---|---|
US (1) | UST101803I4 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4762546A (en) | 1987-04-13 | 1988-08-09 | Tennessee Valley Authority | Production of high-grade nitrogen-sulfur suspension fertilizers |
US4943308A (en) | 1985-10-17 | 1990-07-24 | Hydro Agri Sluiskil B.V. | Method of producing fertilizer granules containing urea and ammonium sulphate |
US5135561A (en) * | 1991-08-22 | 1992-08-04 | Tennessee Valley Authority | Ammonium sulfate suspension intermediates for nitrogen-sulfur fluids |
WO2006004424A1 (en) * | 2004-07-01 | 2006-01-12 | Yara International Asa | Method for producing a fertilizer containing urea and ammonium sulphate |
EP2477961B1 (en) | 2009-09-16 | 2016-04-20 | Stamicarbon B.V. | Removal of urea and ammonia from exhaust gases |
-
1981
- 1981-07-27 US US06/287,399 patent/UST101803I4/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4943308A (en) | 1985-10-17 | 1990-07-24 | Hydro Agri Sluiskil B.V. | Method of producing fertilizer granules containing urea and ammonium sulphate |
US4762546A (en) | 1987-04-13 | 1988-08-09 | Tennessee Valley Authority | Production of high-grade nitrogen-sulfur suspension fertilizers |
US5135561A (en) * | 1991-08-22 | 1992-08-04 | Tennessee Valley Authority | Ammonium sulfate suspension intermediates for nitrogen-sulfur fluids |
WO2006004424A1 (en) * | 2004-07-01 | 2006-01-12 | Yara International Asa | Method for producing a fertilizer containing urea and ammonium sulphate |
EP2477961B1 (en) | 2009-09-16 | 2016-04-20 | Stamicarbon B.V. | Removal of urea and ammonia from exhaust gases |
US10640428B2 (en) | 2009-09-16 | 2020-05-05 | Stamicarbon B.V. | Removal of urea and ammonia from exhaust gases |
EP2477961B2 (en) † | 2009-09-16 | 2023-12-06 | Stamicarbon B.V. | Removal of urea and ammonia from exhaust gases |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DEFENSIVE PUBLICATION OR SIR FILE |