https://journalcsij.com/index.php/CSIJ <p style="text-align: justify;"><strong>Chemical Science International Journal&nbsp;(ISSN:&nbsp;2456-706X)&nbsp;</strong>aims to publish&nbsp;high quality papers (<a href="/index.php/CSIJ/general-guideline-for-authors">Click here for Types of paper</a>)&nbsp;in all aspects of chemical science. The journal also encourages the submission of useful reports of negative results. This is a quality controlled,&nbsp;OPEN&nbsp;peer reviewed, open access INTERNATIONAL journal.</p> SCIENCEDOMAIN international en-US Chemical Science International Journal 2456-706X https://journalcsij.com/index.php/CSIJ/article/view/30201 <p>In this article obtaining complex nitrogen-phosphate fertilizers based on activation of phosphorite powder with partially ammoniated mix of phosphoric and sulphuric acids have been studied. In order to reduce the foaming of the process, for the first time a partially ammoniated mix of acids was used. The optimal technological parameters for activation phosphorite powder with partially neutralized mixes of sulphuric and phosphoric acids are the followings: the mix of sulphuric and phosphoric acids with a ratio of SО₃:Р₂О₅ = 1.2; рН of acids – 2.5; weight ratio of ammonium sulphate-phosphate slurry towards phosphorite powder is 100 : 20; temperature is 60°С; duration is 30 min.&nbsp; The composition nitrogen-phosphate fertilizers obtained in optimal condition contains (wt., %): N – 11.55; Р₂О_5total -24.61; Р₂О_{5acceptable by citric acid} -21.66; Р₂О_{5 acceptable by EDTA} -20.24; Р₂О_{5water-soluble}&nbsp;-13.02; CaO_total -13.59; СаО_acceptable _{by citric acid} -11.43. In that condition, granulated products of nitrogen-phosphate can be produced with high strength. The advantage of offered promising technology concludes in reduction two times expenditure of the most expensive ammonia in comparison with ammonium sulphate production and an increase in gross domestic product.</p> A. A. Rasulov Sh. S. Namazov B. E. Sultonov ##submission.copyrightStatement## 2020-12-31 2020-12-31 1 10 10.9734/CSJI/2020/v29i930201