Resources Contact Us Home
Production of urea-ammonium nitrate suspension fertilizer
T104101 Production of urea-ammonium nitrate suspension fertilizer
Patent Drawings:Drawing: T104101-2    Drawing: T104101-3    Drawing: T104101-4    Drawing: T104101-5    Drawing: T104101-6    
« 1 »

(5 images)

Inventor: Boles, et al.
Date Issued: April 3, 1984
Application: 06/448,568
Filed: December 10, 1982
Inventors: Boles; Jeffrey L. (Florence, AL)
Jones; Thomas M. (Sheffield, AL)
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 71/30; 71/59; 71/64.08
Field Of Search:
International Class: C05C 1/00
U.S Patent Documents:
Foreign Patent Documents:
Other References:

Abstract: Highly concentrated nitrogen suspension fertilizers which have excellent long-term storage and handling properties in both warm and severely cold weather are produced from urea, ammonium nitrate, water, and attapulgite clay and contain urea crystals suspended in a saturated solution containing urea and ammonium nitrate. The compositions must be maintained within a very narrow range to produce suspensions satisfactory for commercial use. This narrow composition range is such that the saturation temperatures and nitrogen contents of the products fall within specific ranges. Deviation from these ranges results in poor quality, commercially unusable products. If the saturation temperature or nitrogen content is too high, the product is too viscous to be pumped or applied to the soil. If the saturation temperature is too low, the product contains excessively large crystals which settle to the bottom of storage and shipping tanks and clog spray nozzles in suspension application equipment. The process consists of first heating the urea, ammonium nitrate, and water to an all solution state or combining hot urea and ammonium nitrate solutions from production. Then the solution is cooled in two or more stages with gelling-type clay added prior to crystallization and air cooling used in the crystallization stage(s).
  Recently Added Patents
Gas cap removal tool
Sensor system
Hybrid coatings and associated methods of application
Sterilizable film for aseptic packaging
Sharing networks determined by sharing of items between individuals
Replacing memory pointers with implicit pointers to be used in compiler-generated debug output
  Randomly Featured Patents
Amphibious aircraft
Lens barrel having a piezoelectric actuator for moving optical elements
Tapered trench structure and process
Arthritic toothbrush
Apparatus and method for performing an editing operation on data read-out from a storage medium which allows random access
Uninterruptible oil supply system
Konjak-added foodstuffs and process of making
Ru-substituted polyoxometalates and process for their preparation
Monoclonal antibody DS6, tumor-associated antigen CA6, and methods of use thereof
Printer and print control method