Urea-acetaldehyde and urea-acetaldehyde-propionaldehyde solutions
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United States of America Patent
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May 27, 1986
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N/A
app pub date -
Sep 30, 1985
filing date -
Nov 13, 1983
priority date (Note) -
Expired
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Abstract
A process for the preparation of neutralized, clear, stable solutions by acid catalyzed reaction of urea and aldehydes where the aldehydes are either acetaldehyde or mixtures of not more than 3 moles of propionaldehyde to 1 mole of acetaldehyde, at reaction pH's of from about 3.1 to 4.5 at temperatures from about 30.degree. C. to 75.degree. C. and the mole ratio of urea to aldehydes is about 1.3:1 to 2.5:1. The products of the process are useful as sprayable sources of nitrogen which are non phytotoxic and have prolonged fertilizer activity.
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