US Patent 8212074 - Forming nanoscale urea particles

http://www.freepatentsonline.com/8212074.html

Urea is a colorless, odorless solid which is neither acidic nor basic, is highly soluble in water, and is used as a fertilizer. This patent teaches a more economical and efficient method for creating urea using a filter with nanoscale channels. Claim 1 reads:

1. A method comprising:

introducing ammonia and carbon dioxide into a nano-channel reactor; and

allowing the ammonia and carbon dioxide to react to form urea particles.