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公开(公告)号：US3875292A
公开(公告)日：1975-04-01
申请号：US38375073
申请日：1973-07-30
CPC分类号： C01B25/00 , C01B25/10 , C01G28/007
摘要： Phosphorus pentafluoride and fluorophosphoric acids are prepared from a fluorine source selected from fluorosulfonate fluorides and mixtures of fluorides and fluorosulfonates and a phosphorus source selected from phosphoric acid and mono- or difluorophosphoric acid. By an analogous process, arsenic pentafluoride and fluoroarsenic acids are prepared by fluorinating an arsenic source selected from arsenic acid and monofluoroarsenic acid.
摘要翻译： 五氟化磷和氟磷酸由选自氟磺酸氟化物和氟化物和氟磺酸盐的混合物的氟源和选自磷酸和单氟或二氟磷酸的磷源制备。 通过类似的方法，通过氟化选自砷酸和一氟砷酸的砷源制备五氟化砷和氟代酸。
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公开(公告)号：US3867511A
公开(公告)日：1975-02-18
申请号：US33308473
申请日：1973-02-16
发明人： CHIANG PETER T , NICKERSON JOHN D
CPC分类号： C01B25/462
摘要： Purified phosphoric acid is obtained from phosphate rock by digesting the rock with sulfuric acid, separating the resulting dilute phosphoric acid liquor and solubilized impurities from the calcium sulfate precipitate, concentrating the liquor to at least about 50% P2O5, extracting the phosphorus values from the concentrated liquor with n-hexanol, n-heptanol, n-octanol, isooctanol, or a mixture thereof, and stripping the phosphoric acid values from the solvent liquor with water to recover purified phosphoric acid. The stripped solvent liquor is recycled to the extraction step. The amount of P2O5 values which are recovered from the impure liquor is substantially enhanced by employing at least two countercurrent extraction stages and at least three stripping stages, wherein about one-half of the raffinate from the first extraction stage is concentrated to match the P2O5 level of the aqueous stream from the last extraction stage and the two streams are admixed and fed to the immediately preceding extraction stage. The throughput rate of the system is significantly increased by maintaining the aqueous phase as the continuous phase in the last stripping stage, while the organic phase is maintained as the continuous phase in all the other extraction and stripping stages.
摘要翻译： 通过用硫酸消化岩石从磷酸盐岩中获得纯化的磷酸，从硫酸钙沉淀物中分离得到的稀磷酸液体和溶解的杂质，将液体浓缩至至少约50％的P2O5，从浓缩物中提取磷值 用正己醇，正庚醇，正辛醇，异辛醇或其混合物的液体，并用水从溶剂液中汽提磷酸值，以回收纯化的磷酸。 将汽提的溶剂液体再循环至萃取步骤。 通过使用至少两个逆流萃取阶段和至少三个汽提阶段，从不纯液体中回收的P2O5值的量大大提高，其中来自第一萃取阶段的约一半的萃余液浓缩以匹配P2O5水平 的来自最后提取阶段的水流，并将两股混合并进料至紧接在前的萃取阶段。 通过将水相保持在最后一个汽提阶段的连续相，同时在所有其它萃取和汽提阶段将有机相保持为连续相，系统的通过率显着增加。
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公开(公告)号：US3634034A
公开(公告)日：1972-01-11
申请号：US3634034D
申请日：1968-02-02
IPC分类号： C01B25/10
摘要： Phosphorus pentafluoride and fluorophosphoric acids are prepared from a fluoride salt, phosphoric acid or monofluorophosphoric acid, and sulfur trioxide by heating the mixture to evolve phosphorus pentafluoride and/or fluorophosphoric acid gases, and recovering the gases.
摘要翻译： 五氟化磷和氟磷酸由氟化物盐，磷酸或单氟磷酸和三氧化硫通过加热该混合物以产生五氟化磷和/或氟磷酸气体并回收气体制备。
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公开(公告)号：US3630711A
公开(公告)日：1971-12-28
申请号：US3630711D
申请日：1970-06-30
发明人： BURKERT GEORGE M , NICKERSON JOHN D
CPC分类号： C01B25/28 , C01B25/405
摘要： Carbonaceous chars resulting from organic matter present in wet process phosphoric acid and generated during the concentration thereof are removed from ammonium polyphosphate solutions by adding an aliphatic organic amine compound to the polyphosphate solution, agitating the mixture and holding the solution until the solids flocculate and float as a froth to the surface, permitting removal of the solids with the froth.
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