Nitrogen fertilizer and process for its manufacture

US4551166A · kind A · utility

Assignee

• SKW Trostberg Aktiengesellschaft · DE

Inventors

• Horst Behnke · Eßlingen, DE
• Horst Michaud · Trostberg, DE
• Joseph Seeholzer · Trostberg, DE
• Svatoplug Solansky · Trostberg, DE

Key dates

• Filing date: May 21, 1984
• Grant date: Nov 5, 1985
• Expiry date: May 21, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S71/902
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a nitrogen fertilizer having a long-term action based on urea-formaldehyde condensation products suspended in water. The fertilizer contains dicyandiamide in an amount of from 5 to 35% by weight of dicyandiamide-nitrogen, based on the nitrogen content of the urea, and from 0.001 to 0.5% by weight of polymers of vinyl alcohol or polymers of aldehyde-carboxylic acids, based on the weight of the suspension.