Conditions of receiving a phosphite as withdrawal – a by-product of production of nitrogen-phosphorus fertilizers

Andrey Kochetkov, Natal'ya Shchegoleva, Sergey Korotkovskiy, Victor Talalai, Yury Vasilyev, Igor Shashkov
2019 Transportnye Sooruženiâ  
Application of a phosphite for construction of highways is expedient for economic and ecological reasons. Most effective use of a semi-hydrate form of a phosphite for construction of local roads. One of limiting factors of wide use of a phosphite in road construction is lack of due regulatory base. By production of extraction phosphoric acid on the Balakovo branch JSC Apatit the method of vitriolic decomposition of phosphorus-containing raw materials by sulfuric acid a lot of phosphoric acid
more » ... h the subsequent division of the received phosphoric acid (a liquid phase) and educated crystalline hydrate of sulfate of calcium in a floor – or a digidratny form (a firm phase) on a vacuum filtration is used. Digidratny and semi-hydrate process of vitriolic receiving phosphoric acid along with two-phasic processes are the most economically effective processes.
doi:10.15862/01sats219 fatcat:5uknovaivfda3ng3ft55m2bg5i