Nitrogen+Syngas 399 Jan-Feb 2026
27 January 2026
Problem No. 76 Additives to improve quality of prills
This round table discusses the benefits of different additives as an alternative to formaldehyde to improve the quality of prills. For example, the benefits of adding gypsum and/or AS to urea prills includes:
- significant higher plant production capacity;
- nitrogen and sulphur (and calcium) as nutrients in one prill (higher nitrogen use efficiencies);
- significant higher crushing strength;
- large particle size; negligible additional heat load on prilling tower;
- smaller product size distribution with the Kreber Vibro prilling bucket;
- no formaldehyde but coating will be required;
- lower ammonia and dust emissions;
- biuret formation stops;
- payback times of only a few months.
Urea + ammonium-sulphate fertilizers (UAS)
