Urea is the most commonly used nitrogen fertiliser, however a large fraction of this nitrogen can be lost as ammonia gas due to the presence of the urease enzyme in the soil. Urease, a naturally occurring enzyme catalyses the hydrolysis of urea to unstable carbamic acid which readily decomposes to the atmosphere as ammonia and carbon dioxide. From an environmental and economic point of view it is very important to reduce the volatilisation of nitrogen in urea and improve the efficiency of its delivery to the plant.
Borates are well known to act as urease inhibitors which reduce the volatilisation of nitrogen, in addition to being an added-value micronutrient. They are typically added as a powder to the molten urea prior to prilling. Having a liquid borate suspension of micronised particles allows flexibility in the addition of the boron. As a suspension, the borate can easily be added and readily mixed at different stages in the production of urea such as during crystallisation or addition to the melt before prilling or as a boron coating after prilling.
If you are interested in incorporating boron in urea please contact our technical team to discuss the best technique to suit your process.