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1. 发明授权

US4511543A Method for beneficiation of phosphate rock 失效
标题翻译：磷酸盐岩选矿方法
公开(公告)号：US4511543A
公开(公告)日：1985-04-16
申请号：US590278
申请日：1984-03-16
申请人： Yehuda Keren , Shmuel Carmon , Meyer Behar , Shimshon Axelrod
发明人： Yehuda Keren , Shmuel Carmon , Meyer Behar , Shimshon Axelrod
IPC分类号： B07B15/00 , C01B25/01 , C01F1/00 , C01F5/00
CPC分类号： C01B25/01 , Y02P20/129
摘要： The present invention relates to a method for beneficiation of phosphate rock by a thermal treatment, wherein an appreciable increase in P.sub.2 O.sub.5 and decrease in cadmium contents in the calcined product are achieved. According to the invention, the phosphate rock is contacted with hot gases possessing a temperature in the range of between 700.degree. C. to 1600.degree. C. for a period of below 60 seconds and subsequently the fines are removed by a conventional classification method thus obtaining an up-graded phosphate product with a relatively low cadmium content. The up-graded phosphate product is also characterized by a relatively low sulfide content as well as low organic matter, which are very advantageous in the phosphoric acid manufacture therefrom. One of the advantages of the method is the almost complete recovery of the P.sub.2 O.sub.5 present in the phosphate rock since no slaking for calcium oxide removal is utilized.
摘要翻译：本发明涉及通过热处理对磷酸盐岩进行选矿的方法，其中实现了煅烧产物中P 2 O 5明显增加和镉含量的降低。根据本发明，磷酸盐岩与温度在700℃至1600℃之间的热气体接触低于60秒的时间，随后通过常规的分级方法除去细粉，从而获得具有较低镉含量的高级磷酸盐产品。升级的磷酸盐产品的特征还在于硫化物含量相对较低以及低有机物质，这在其磷酸制造中是非常有利的。该方法的优点之一是磷酸盐岩中存在的P2O5几乎完全恢复，因为不利用去除氧化钙。

2. 发明授权

US4759920A Process for the manufacture of disodium phosphate 失效
标题翻译：制造磷酸二钠的方法
公开(公告)号：US4759920A
公开(公告)日：1988-07-26
申请号：US872062
申请日：1986-06-06
申请人： Alexander Iosef , Menachem Bar-On
发明人： Alexander Iosef , Menachem Bar-On
IPC分类号： C01B25/30 , C01B15/16 , C01B25/26
CPC分类号： C01B25/303
摘要： The present invention relates to a process for the manufacture of disodium phosphate of a high purity without utilizing organic solvents. According to the process, monosodium sulfate is reacted, at a temperature, in the range of 40 to 100 degrees 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 constituent 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 crystallization. The process is characterized by a high recovering of the P.sub.2 O.sub.5 and Na.sub.2 O values, the resulted product being substantially free of chloride ion.

3. 发明授权

US3114623A Upgrading of phosphate ores 失效
标题翻译：磷酸盐矿石的升级
公开(公告)号：US3114623A
公开(公告)日：1963-12-17
申请号：US5713160
申请日：1960-09-20
申请人： NEGEV PHOSPHATES LTD
发明人： CARMELA BEN-AIR , DOV BEN-ARI
IPC分类号： C05B11/02
CPC分类号： C05B11/02

4. 发明授权

US4678649A Process for the manufacture of monopotassium phosphate 失效
标题翻译：制造磷酸二氢钾的方法
公开(公告)号：US4678649A
公开(公告)日：1987-07-07
申请号：US872061
申请日：1986-06-06
申请人： Iosef Alexander , Menachem Bar-on
发明人： Iosef Alexander , Menachem Bar-on
IPC分类号： C01B25/30 , C01B15/16 , C01B25/26
CPC分类号： C01B25/301 , C01B25/303
摘要： The present invention relates to a process for the manufacture of monopotassium phosphate of a high purity without utilizing organic solvents. According to the process, monopotassium sulfate is reacted, at a temperature in the range of between 40 to 100 degrees 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 elininated, with the calcium sulfate resulted thereto. After separating out the calcium sulfate, the filtrate is neutralized to a pH in the range of between 3 to 7, with a calcium-containing compound comprising Ca(OH).sub.2, CaO or CaCO.sub.3, or mixtures thereof. From the filtrate obtained, pure monopotassium phosphate is crystallized out. The process is characterized by a high recovery of the P.sub.2 O.sub.5 and K.sub.2 O values, the monopotassium phosphate produced being completely free of chloride ion.
摘要翻译：本发明涉及不使用有机溶剂制备高纯度磷酸二氢钾的方法。根据该方法，在磷酸存在下，硫酸氢钾在40至100度的温度下与选自磷酸盐岩，磷酸二钙或其混合物的磷酸盐成分反应。存在于起始磷酸盐岩中的普通金属杂质，有机物和氟化物基本上被酸化，产生硫酸钙。在分离出硫酸钙之后，将滤液用包含Ca（OH）2，CaO或CaCO 3的含钙化合物或其混合物中和至3至7范围内的pH。从得到的滤液中，将纯的磷酸二氢钾结晶出来。该方法的特征在于P2O5和K2O值的高回收率，所产生的磷酸二氢钾完全不含氯离子。

5. 发明授权

US4585636A Process for the manufacture of purified phosphoric acid 失效
标题翻译：制备纯化磷酸的方法
公开(公告)号：US4585636A
公开(公告)日：1986-04-29
申请号：US661710
申请日：1984-10-17
申请人： Alexander Iosef , Menachem Bar-on , Jacob Oren , Dagobert Kellerman
发明人： Alexander Iosef , Menachem Bar-on , Jacob Oren , Dagobert Kellerman
IPC分类号： C01B25/234 , C01B25/46 , C01B25/16
CPC分类号： C01B25/461 , C01B25/234 , C01B25/462
摘要： The present invention relates to an improved process for the manufacture of purified phosphoric acid from phosphate rock. According to the invention, phosphate rock is decomposed by a mineral acid selected from hydrochloric acid, sulfuric acid or mixtures thereof. The dissolution liquor obtained is reacted with a calcium-containing compound such as calcium oxide, calcium carbonate, tricalcium phosphate and fines of phosphate rock producing an aqueous solution containing monocalcium phosphate in an amount corresponding to between 0.4% to 5.5% by wt CaO. After the separation of the precipitated solids, the clarified solution is extracted by an organic solvent having the property to extract the phosphate component. The phosphoric acid is subsequently recovered from the solvent extract by known methods such as washing or distillation.
摘要翻译：本发明涉及从磷酸盐岩制造纯化磷酸的改进方法。根据本发明，磷酸盐岩由选自盐酸，硫酸或其混合物的无机酸分解。将得到的溶解液与含钙化合物如氧化钙，碳酸钙，磷酸三钙和磷酸盐岩的细粉反应，生成含有相当于0.4〜5.5重量％CaO的磷酸一钙的水溶液。析出的固体分离后，通过具有提取磷酸盐成分性质的有机溶剂提取澄清溶液。随后通过已知的方法例如洗涤或蒸馏从溶剂提取物中回收磷酸。

6. 发明授权

US3170762A Manufacture of magnesium hydroxide 失效
标题翻译：氢氧化镁的制造
公开(公告)号：US3170762A
公开(公告)日：1965-02-23
申请号：US14200861
申请日：1961-10-02
申请人： NEGEV PHOSPHATES LTD
发明人： CARMCIA BEN-ARI , FUCHS WARREN J
IPC分类号： C01F5/20
CPC分类号： C01F5/20

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