What raw materials are generally added during urea granulation?
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I would like to ask friends who are knowledgeable about urea granulation, what raw materials are generally added during urea granulation? Except for biuret.
Under normal circumstances, there is no need to add other materials for urea granulation. However, existing companies add a small amount of formaldehyde to improve the strength of finished urea particles.
Biuret is a by-product, not added. Nowadays, to produce polypeptide urea, it is necessary to add a part of polypeptide chelated potassium.
The answer on the 3rd floor is very correct. If general urea is produced, a small amount of formaldehyde can be added in order to improve strength.