| 摘要 |
<p>To make and use nitrogenous fertilizer on a farm nitrogen dioxide is prepared in a continuous process from air or from ammonia in a reactor, with the ammonia either being transported to the farm or being prepared on the farm in a continuous process from water and air. The nitrogen dioxide is mixed with a continuous flow of water to form a dilute solution of nitric acid, which may be applied to the field through the irrigation system as top dressing or mixed within the irrigation system with ammonia or other cations to form ammonium nitrate or other desired nitrogen solutions for application to the fields in a continuous process of concentrated without requiring storage of large amounts of gas or creating heat exchange problems in the manufacturing process. This process has the advantages of: (1) continuous in-line utilization of the fertilizer solutions in dilute solution where irrigation is practiced; (2) making the fertilizer solutions in concentrations practical for storage and subsequent utilization on farms where irrigation is not practiced or where an irrigation farmer desires to store or use concentrated nitrogen solutions; and(3) controlling the ratio of nitrate to ammonium or other fertilizer cations in the fertilizer solution.</p> |
