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    • 99. 发明申请
    • GRANULATED FERTILIZER CONTAINING WATER SOLUBLE FORMS OF NITROGEN, MAGNESIUM AND SULPHUR, AND METHOD OF ITS PREPARATION
    • 包含水可溶性氮,镁和硫的颗粒肥料及其制备方法
    • WO2008013510A3
    • 2008-05-15
    • PCT/SK2007050017
    • 2007-07-25
    • DUSLO ASLENCSES LADISLAVKRALIK MILANLEHOCKY PETERSTEFANCOVA RADKAKERDO PAVOLFERENCI MICHALPOLAK ANTON
    • LENCSES LADISLAVKRALIK MILANLEHOCKY PETERSTEFANCOVA RADKAKERDO PAVOLFERENCI MICHALPOLAK ANTON
    • C05C1/00C05C3/00C05D5/00C05D9/00
    • C01C1/18C01C1/24C01F5/40C05C1/00C05C3/00C05D5/00C05G3/0058
    • 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 - (NH 4 ) 2 SO 4 .MgSO 4 .6H 2 O and binary salts ammonium nitrate - 2NH 4 NO 3 .(NH 4 ) 2 SO 4 and 3NH 4 NO 3 .(NH 4 ) 2 SO 4 , 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 HNO 3 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 (NH 4 ) 2 SO 4 -MgSO 4 .6H 2 O, 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.
    • 包含水溶性形式的氮,镁和硫的颗粒肥料含有​​15-30重量%的氮,1-18重量%的硫,2-10重量%的镁,以氧化镁MgO表示 (NH 4 )2 SO 4 .MgSO <4> SUB和O和二元盐硝酸铵 - 2NH 4 NO 3。(NH 4 SUB 2)SO 4 和3NH 4 3 。(NH <4> 2 SO 4 其中所述肥料中bou石的含量为40至45重量%。 菱镁矿在60〜130℃的温度下用含30〜80%HNO 3的浓硝酸处理,形成含有硝酸镁,硝酸钙的反应混合物,或可能根据 与菱镁矿中金属化合物的含量,铁,锰和其它金属元素的硝酸盐含量以及其余未分解的菱镁矿的含量,反应混合物随后用碱性试剂随后中和至pH为3-7.5,中和的反应混合物随后离开 在80至130℃的温度下与硫酸铵反应20至80分钟,形成bou石(NH 4)4的浆料 包含10至30重量%水的浆料与来自前述生产的干燥再循环以比例混合 为1:2至1:10,并在湿颗粒形成时造粒,从中除去游离水后,最终产品 ct被获得。