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1. 发明公开

EP0240635A1 Process for the manufacture of disodium phosphate 失效转让
标题翻译： Verfahren zur Herstellung von Natriummonohydrogenphosphat。
公开(公告)号：EP0240635A1
公开(公告)日：1987-10-14
申请号：EP86304443.4
申请日：1986-06-10
申请人： NEGEV PHOSPHATES LTD.
发明人： Iosef, Alexander , Bar-On, Menachem
IPC分类号： C01B25/30
CPC分类号： C01B25/303
摘要： A process for the manufacture of disodium phosphate of a high purity without utilising organic solvents. Monosodium sulfate is reacted, at a temperature in the range of 40 to 100°C with a phosphate constituent selected from phosphate rock, dicalcium phosphate or mixtures thereof, in the presence of phosphoric acid. The common metal impurities, organic matter and fluorides present in the starting phosphate rock are substantially complete eliminated with the solid gypsum or dicalcium phosphate resulted thereto. After separating said solid, the filtrate is treated in two neutralization stages: first by a calcium constituent selected from calcium carbonate, calcium hydroxide or mixtures thereof and separating the formed dicalcium phosphate, followed by a 'second neutralization with an alkali sodium constitu- lent selected from sodium hydroxide, sodium carbonate and sodium bicarbonate or mixtures thereof at a pH in the range of 8.0 to 9.5. From the resulted filtrate, pure disodium phosphate is obtained by crystallisation.
摘要翻译：一种制造高纯度磷酸二钠而不使用有机溶剂的方法。在磷酸的存在下，硫酸硫酸钠与选自磷酸盐岩，磷酸二钙或其混合物的磷酸盐成分在40至100℃的温度下反应。存在于起始磷酸盐岩中的普通金属杂质，有机物质和氟化物基本上完全被固体石膏或磷酸二钙所消除。在分离所述固体之后，将滤液在两个中和阶段进行处理：首先用选自碳酸钙，氢氧化钙或其混合物的钙成分进行处理，分离所形成的磷酸二钙，然后用选自氢氧化钠的碱金属钠组分进行第二次中和，碳酸钠和碳酸氢钠或其混合物，pH在8.0至9.5的范围内。从所得滤液中，通过结晶获得纯磷酸二钠。

2. 发明公开

EP0208422A2 Process for the manufacture of monopotassium phosphate 有权转让
标题翻译：生产磷酸一钾的方法
公开(公告)号：EP0208422A2
公开(公告)日：1987-01-14
申请号：EP86304442.6
申请日：1986-06-10
申请人： NEGEV PHOSPHATES LTD.
发明人： Iosef, Alexander , Bar-On, Menachem
IPC分类号： C01B25/30
CPC分类号： C01B25/301 , C01B25/303
摘要： A process for the manufacture of monopotassium phosphate of a high purity without utilizing organic solvents. Monopotassium sulfate is reacted, at a temperature in the range of 40 to 100°C with a phosphate constituent selected from phosphate rock, dicalcium phosphate or mixtures thereof in the presence of phosphoric acid. The common metal impurities, organic matter and fluorides present in the starting phosphate rock are substantially eliminated, with the calcium sulfate resulted thereto. After separating out the calcium sulfate, the filtrate is neutralised to a pH in the range of 3 to 7, with a calcium-containing compound comprising Ca(OH) 2 , CaO or CaC0 3 , or mixtures thereof. From the filtrate obtained, pure monopotassium phosphate is crystallised out.
摘要翻译：不使用有机溶剂制造高纯度磷酸一钾的方法。在磷酸存在下，硫酸二钾在40-100℃的温度下与选自磷酸盐岩，磷酸二钙或其混合物的磷酸盐组分反应。存在于起始磷酸盐岩石中的普通金属杂质，有机物质和氟化物基本上被消除，随之产生硫酸钙。分离出硫酸钙后，用含钙化合物（包括Ca（OH）2，CaO或CaCO 3或其混合物）将滤液中和至3-7的pH。从得到的滤液中，将纯的磷酸一钾结晶出来。

3. 发明授权

EP0208422B1 Process for the manufacture of monopotassium phosphate 有权转让
标题翻译：磷酸单磷酸盐的制备方法
公开(公告)号：EP0208422B1
公开(公告)日：1990-04-25
申请号：EP86304442.6
申请日：1986-06-10
申请人： NEGEV PHOSPHATES LTD.
发明人： Iosef, Alexander , Bar-On, Menachem
IPC分类号： C01B25/30
CPC分类号： C01B25/301 , C01B25/303

4. 发明授权

EP0240635B1 Process for the manufacture of disodium phosphate 失效转让
标题翻译：磷酸二氢钙的制造工艺
公开(公告)号：EP0240635B1
公开(公告)日：1990-03-07
申请号：EP86304443.4
申请日：1986-06-10
申请人： NEGEV PHOSPHATES LTD.
发明人： Iosef, Alexander , Bar-On, Menachem
IPC分类号： C01B25/30
CPC分类号： C01B25/303

5. 发明公开

EP0208422A3 Process for the manufacture of monopotassium phosphate 有权转让
标题翻译：磷酸单磷酸盐的制备方法
公开(公告)号：EP0208422A3
公开(公告)日：1987-04-01
申请号：EP86304442
申请日：1986-06-10
申请人： NEGEV PHOSPHATES LTD.
发明人： Iosef, Alexander , Bar-On, Menachem
IPC分类号： C01B25/30
CPC分类号： C01B25/301 , C01B25/303
摘要： A process for the manufacture of monopotassium phosphate of a high purity without utilizing organic solvents. Monopotassium sulfate is reacted, at a temperature in the range of 40 to 100°C with a phosphate constituent selected from phosphate rock, dicalcium phosphate or mixtures thereof in the presence of phosphoric acid. The common metal impurities, organic matter and fluorides present in the starting phosphate rock are substantially eliminated, with the calcium sulfate resulted thereto. After separating out the calcium sulfate, the filtrate is neutralised to a pH in the range of 3 to 7, with a calcium-containing compound comprising Ca(OH) 2 , CaO or CaC0 3 , or mixtures thereof. From the filtrate obtained, pure monopotassium phosphate is crystallised out.

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