Apparatus and method for dissolving urea and other endothermic m

Details Apparatus and method for dissolving urea and other endothermic m Apparatus and method for dissolving urea and other endothermic m

1984-11-05

1986-09-09

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Organic material-containing

71 59, 71 61, C05C 900

Patent

active

046107142

ABSTRACT:
An energy efficient, economical method for dissolving urea, and other endothermic materials, e.g. potassium chloride, ammonium nitrate, etc., in water, without the use of fossil fuel-derived heat, which comprises: forming a slurry of such material and water, said slurry including said material as both a dissolved and solid phase; forming droplets of said slurry; and contacting said droplets of said slurry, in direct heat exchange relationship, with a moisture-containing air stream, having a temperature greater than the temperature of said droplets of said slurry, at conditions whereby both heat and moisture are removed from said moisture-containing air to thereby dissolve at least a portion of said solid phase. This process is especially useful for forming aqueous forming urea solutions, useful in agricultural applications and having from 19 to 23 percent, by weight, nitrogen. An apparatus, useful in said method, is also disclosed and claimed.

REFERENCES:
patent: 4424072 (1984-01-01), Lerner
patent: 4449900 (1984-05-01), Lerner

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