A method of producing a complex mineral fertilizer is disclosed, comprising the steps of decomposing polyhalite at a temperature not exceeding 110 DEG C. in the presence of dilute nitric acid, neutralizing the obtained suspension with a substance selected from the group consisting of calcium carbonate, calcium hydroxide and calcium oxide, and separating the resultant product.
申请公布号
US4246019(A)
申请公布日期
1981.01.20
申请号
US19790013150
申请日期
1979.02.21
申请人
SOKOLOV, IGOR D.;SAFRYGIN, JURY S.;MURAVIEV, ALEXANDR V.;ANDREEVA, NINA K.;ZYKOV, VALERY A.
发明人
SOKOLOV, IGOR D.;SAFRYGIN, JURY S.;MURAVIEV, ALEXANDR V.;ANDREEVA, NINA K.;ZYKOV, VALERY A.