UST101803I4 - Production of urea-ammonium sulfate suspension fertilizer - Google Patents

Production of urea-ammonium sulfate suspension fertilizer Download PDF

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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
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United States
Prior art keywords
production
urea
ammonium sulfate
sulfate suspension
suspension fertilizer
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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
Application number
US06/287,399
Inventor
Thomas M. Jones
Jeffrey L. Boles
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TENNESSEE VALLEY AUTHORITY A CORPOF UNITED STATES
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TENNESSEE VALLEY AUTHORITY A CORPOF UNITED STATES
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Application filed by TENNESSEE VALLEY AUTHORITY A CORPOF UNITED STATES filed Critical TENNESSEE VALLEY AUTHORITY A CORPOF UNITED STATES
Priority to US06/287,399 priority Critical patent/UST101803I4/en
Assigned to TENNESSEE VALLEY AUTHORITY, A CORP.OF UNITED STATES reassignment TENNESSEE VALLEY AUTHORITY, A CORP.OF UNITED STATES ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BOLES, JEFFREY L., JONES, THOMAS M.
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Publication of UST101803I4 publication Critical patent/UST101803I4/en
Pending legal-status Critical Current

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    • 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

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  • 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.
US06/287,399 1981-07-27 1981-07-27 Production of urea-ammonium sulfate suspension fertilizer Pending UST101803I4 (en)

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

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US06/287,399 Pending UST101803I4 (en) 1981-07-27 1981-07-27 Production of urea-ammonium sulfate suspension fertilizer

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Cited By (5)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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