Chemistry: fertilizers – Processes and products – Inorganic material
Patent
1979-06-13
1982-02-02
Bashore, S. Leon
Chemistry: fertilizers
Processes and products
Inorganic material
71 62, 71 63, 71 24, 71 26, 71 646, 106 80, 106 84, 106DIG1, 423332, 423334, C05D 100
Patent
active
043137539
ABSTRACT:
A process for producing a citric acid soluble potassium silicate fertilizer comprises a step for kneading a mixture consisting essentially of potassium carbonate, fly ash, pulverized coal, other necessary starting materials and a caustic potash solution as a binder and then granulating the kneaded mixture, a step for drying the granulated product to a nearly absolutely dry state, and a step for calcining the dried granular product, whereby a chemical reaction takes place between the potassium and the silicon present in fly ash to convert them into a citric acid soluble potassium silicate. A process according to a second embodiment comprises a step for kneading a mixture consisting essentially of a potassium source, such as potash and/or potassium carbonate, fly ash, other components necessary for the production of citric acid soluble potassium silicate fertilizer and a binder, such as alcoholic waste liquor or the like, and then granulating the kneaded mixture, a step for drying the kneaded mixture to a nearly absolutely dry state, and a step for calcining the dried granular product, whereby a chemical reaction takes place between the potassium and the silicic acid present in fly ash to form a citric acid soluble potassium silicate. An apparatus for practicing the processes mentioned above comprises a plurality of continuous quantitative feeders, a continuous kneader, an extruder for forming granules, a fluid dryer, a fluid calcining furnace, and a cooling device for cooling calcined product.
REFERENCES:
patent: 1401648 (1921-12-01), Rossi
patent: 2352738 (1944-07-01), Ruthruff
patent: 2374035 (1945-04-01), Nutting, Jr.
patent: 2948948 (1960-08-01), Duplin, Jr. et al.
patent: 3971631 (1976-07-01), Almagro et al.
Akizuki Katsufumi
Segawa Hiroshi
Bashore S. Leon
Denpatsu Fly Ash Company
Lander F. H.
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