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1.发明授权GRANULATED FERTILIZER CONTAINING WATER SOLUBLE FORMS OF NITROGEN, MAGNESIUM AND SULPHUR, AND METHOD OF ITS PREPARATION 有权肥料颗粒使氮，镁，硫成分：水可溶性形式，以及生产方法
公开(公告)号：EP2051953B1
公开(公告)日：2010-04-28
申请号：EP07769076.6
申请日：2007-07-25
申请人： Duslo, A.S.
发明人： LENCSES, Ladislav , KRALIK, Milan , LEHOCKY, Peter , STEFANCOVA, Radka , KERDO, Pavol , FERENCI, Michal , POLAK, Anton
摘要： Granulated fertilizer, containing water soluble forms of nitrogen, magnesium and sulphur, contains 15 to 30 % by weight of nitrogen, 1 to 18 % by weight of sulphur, 2 to 10 % by weight of magnesium, expressed as magnesium oxide MgO, in the form of boussingaultite - (NH4)2SO4.MgSO4.6H2O and binary salts ammonium nitrate - 2NH4NO3.(NH4)2SO4 and 3NH4NO3.(NH4)2SO4, wherein the content of boussingaultite in the fertilizer is 40 to 45 % by weight. Magnesite is treated with concentrated nitric acid containing 30 to 80 % of HNO3 at a temperature of 60 °C to 130 °C, under formation of reaction mixture containing magnesium nitrate, calcium nitrate, or possibly, according to the content of metallic compounds in magnesite, nitrates of iron, manganese and further metallic elements, and the remainder of undecomposed magnesite, the reaction mixture is subseguently neutralized with an alkaline agent to pH of 3 to 7.5, the neutralized reaction mixture is subseguently left to react with ammonium sulphate at a temperature of 80 to 130 °C for 20 to 80 minutes under formation of a slurry of boussingaultite (NH4)2SO4-MgSO4.6H2O, containing 10 to 30 % by weight of water, which slurry is mixed with dried recycle from the preceding production in the ratio of 1 :2 to 1 :10 and it is granulated under formation of wet granulate, from which, after removing free water, the final product is obtained.
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2.发明公开METHOD OF PREPARATION OF GRANULATED INDUSTRIAL NITROGEN-CALCIUM FERTILIZER 有权PROCEDURE工业氮肥钙的粒状形式的制备方法
公开(公告)号：EP2167428A2
公开(公告)日：2010-03-31
申请号：EP08779511.8
申请日：2008-07-09
申请人： Duslo, A.S.
发明人： LENCSES, Ladislav , KRALIK, Milan , STEFANCOVA, Radka , GBELSKY, Frantisek , KERDO, Pavol , FERENCI, Michal , PROTUS, Roman
CPC分类号： C05D3/02 , C05C1/00 , C05C5/04 , C05C1/02 , C05G3/0058
摘要： Method of preparation of granulated industrial nitrogen-calcium fertilizer from the reaction mixture resulting from decomposition of mineral salts of calcium cations with nitric acid, by the action of a basic agent at pH of 6 to 10 and at a temperature of 50 to 120 °C. Undesirable cations are precipitated, they are separated, in the obtained solution the ratio Ca2+ : NH 4+ is adjusted to 4.5 to 9.4 by adding aqueous solution of nitric acid and gaseous and/or liquidammonia and/or ammonia nitrate. The obtained solution is thickened, overheated solution having a temperature of 100 to 170 °C is injected into a granulator, powder phase is added, it is granulated at a temperature of 40 to 135 °C, and adjusted to a temperature of the resulting granulate not exceeding 110 °C. The granulated material is screened, the appropriate fraction of the granulated fertilizeris separated, oversized fraction is grind and together with the undersized fraction is cooled and returned into the granulator.
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3.发明授权METHOD OF PREPARATION OF GRANULATED INDUSTRIAL NITROGEN-CALCIUM FERTILIZER 有权PROCEDURE工业氮肥钙的粒状形式的制备方法
公开(公告)号：EP2167428B1
公开(公告)日：2011-12-14
申请号：EP08779511.8
申请日：2008-07-09
申请人： Duslo, A.S.
发明人： LENCSES, Ladislav , KRALIK, Milan , STEFANCOVA, Radka , GBELSKY, Frantisek , KERDO, Pavol , FERENCI, Michal , PROTUS, Roman
CPC分类号： C05D3/02 , C05C1/00 , C05C5/04 , C05C1/02 , C05G3/0058
摘要： Method of preparation of granulated industrial nitrogen-calcium fertilizer from the reaction mixture resulting from decomposition of mineral salts of calcium cations with nitric acid, by the action of a basic agent at pH of 6 to 10 and at a temperature of 50 to 120 °C. Undesirable cations are precipitated, they are separated, in the obtained solution the ratio Ca2+ : NH 4+ is adjusted to 4.5 to 9.4 by adding aqueous solution of nitric acid and gaseous and/or liquidammonia and/or ammonia nitrate. The obtained solution is thickened, overheated solution having a temperature of 100 to 170 °C is injected into a granulator, powder phase is added, it is granulated at a temperature of 40 to 135 °C, and adjusted to a temperature of the resulting granulate not exceeding 110 °C. The granulated material is screened, the appropriate fraction of the granulated fertilizeris separated, oversized fraction is grind and together with the undersized fraction is cooled and returned into the granulator.
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4.发明公开GRANULATED FERTILIZER CONTAINING WATER SOLUBLE FORMS OF NITROGEN, MAGNESIUM AND SULPHUR, AND METHOD OF ITS PREPARATION 有权肥料颗粒使氮，镁，硫成分：水可溶性形式，以及生产方法
公开(公告)号：EP2051953A2
公开(公告)日：2009-04-29
申请号：EP07769076.6
申请日：2007-07-25
申请人： Duslo, A.S.
发明人： LENCSES, Ladislav , KRALIK, Milan , LEHOCKY, Peter , STEFANCOVA, Radka , KERDO, Pavol , FERENCI, Michal , POLAK, Anton
摘要： Granulated fertilizer, containing water soluble forms of nitrogen, magnesium and sulphur, contains 15 to 30 % by weight of nitrogen, 1 to 18 % by weight of sulphur, 2 to 10 % by weight of magnesium, expressed as magnesium oxide MgO, in the form of boussingaultite - (NH4)2SO4.MgSO4.6H2O and binary salts ammonium nitrate - 2NH4NO3.(NH4)2SO4 and 3NH4NO3.(NH4)2SO4, wherein the content of boussingaultite in the fertilizer is 40 to 45 % by weight. Magnesite is treated with concentrated nitric acid containing 30 to 80 % of HNO3 at a temperature of 60 °C to 130 °C, under formation of reaction mixture containing magnesium nitrate, calcium nitrate, or possibly, according to the content of metallic compounds in magnesite, nitrates of iron, manganese and further metallic elements, and the remainder of undecomposed magnesite, the reaction mixture is subseguently neutralized with an alkaline agent to pH of 3 to 7.5, the neutralized reaction mixture is subseguently left to react with ammonium sulphate at a temperature of 80 to 130 °C for 20 to 80 minutes under formation of a slurry of boussingaultite (NH4)2SO4-MgSO4.6H2O, containing 10 to 30 % by weight of water, which slurry is mixed with dried recycle from the preceding production in the ratio of 1 :2 to 1 :10 and it is granulated under formation of wet granulate, from which, after removing free water, the final product is obtained.
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