Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1984-11-20
1990-07-31
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Organic material-containing
71 6408, 71 6410, 564 39, C05C 900
Patent
active
049447874
ABSTRACT:
This invention provides thermally stable urea-sulfuric acid compositions and methods for manufacturing and using such compositions. The novel compositions comprise combinations of urea and sulfuric acid which contain less than about one weight percent water based on the combined weight of urea and sulfuric acid. Such compositions are substantially more stable thermally than are compositions which contain more than about one weight percent water.
The thermally stable compositions are prepared by forming the urea-sulfuric acid component in the presence of less than one weight percent water based on the combined weight of urea and sulfuric acid and/or by physically and or chemically removing water from the urea-sulfuric acid component. Water can be removed by evaporation and/or by contacting the urea-sulfuric acid component, either during or after its formation, with one or more chemical dehydrating agents capable of chemically combining with water in the composition.
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Laird Michael H.
Lander Ferris H.
Union Oil Company of California
Wirzbicki Gregory F.
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