Urea-formaldehyde plant nutrient solution containing high...

Details Urea-formaldehyde plant nutrient solution containing high... Urea-formaldehyde plant nutrient solution containing high...

C - Chemistry, Metallurgy

05

C

C05C 9/02 (2006.01) C05G 3/00 (2006.01)

Patent

CA 2458083

The present invention provides a one-stage method of preparing a urea- formaldehyde plant nutrient solution with high percentage of Slow Release Nitrogen (SRN) moiety and low amounts of methylol by-products. A solution of formalin is reacted with urea in the presence of small amount of alkaline material to maintain a pH greater than 7. After the urea has dissolved, an ammonia reactant is added to the reaction mixture. The reaction mixture is exothermically (and, if needed, externally) heated to at least about 90°C and held for about 70-75 minutes, during which a calculated amount of alkaline material is added, typically in three portions over the first 45 minutes of the 70-75 minute period.

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