Chemistry: fertilizers – Processes and products – Inorganic material
Patent
1998-01-28
1999-08-31
Langel, Wayne
Chemistry: fertilizers
Processes and products
Inorganic material
71 63, 71 641, 210670, 210681, 423470, 423514, C01B 1764
Patent
active
059448687
ABSTRACT:
Ion exchange is used to make two grades of liquid fertilizer. In the first phase, ammonium thiosulfate (ATS) is contacted with a potassium-containing ion exchange resin to make the liquid fertilizer potassium thiosulfate (KTS) and an ammonium-containing resin. If operated under ambient temperatures, oxidation of any sulfites and the attendant formation of insoluble sulfates is avoided along with the associated fouling costs.
The recharge line is operated in parallel to the KTS line. When the ammonium-containing resin is contacted with potassium chloride, the ammonium cations are exchanged for potassium cations and produce an ammonium chloride that can be used as a second liquid fertilizer. If desired, a concentrator can be used to remove water from each fertilizer to increase its concentration of KTS or ammonium chloride.
REFERENCES:
patent: 2366650 (1945-01-01), Rawlings et al.
patent: 3096153 (1963-07-01), Hadzeriga
patent: 3622268 (1969-03-01), Wada et al.
patent: 4210437 (1980-07-01), Windgassen et al.
patent: 4321235 (1982-03-01), Mouret et al.
patent: 5449506 (1995-09-01), Berry et al.
Clarkson Mark
Faynshteyn Yelana (Helen)
Langel Wayne
Tessenderlo Kerley, Inc.
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