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1.发明公开Process for removing cadmium from phosphoric acid streams 失效Verfahren zum Entfernen von镉ausphosphororsäurehaltigenLösungen。
公开(公告)号：EP0463674A2
公开(公告)日：1992-01-02
申请号：EP91201484.2
申请日：1991-06-14
发明人： Anania, Guido , Cultrera, Vito , Blanca, Domenico
IPC分类号： C22B3/24 , C01B25/238
CPC分类号： C01B25/238 , C01G11/003 , C22B3/24 , Y02P10/234
摘要： Cadmium is removed from phosphoric acid streams containing it by a process comprising initially treating the stream concerned with halide ions and metallic iron, followed by absorbing the resultant phosphoric solution on adsorption resin not of ion exchange type.
摘要翻译： 通过包括首先处理与卤素离子和金属铁相关的流，然后在不是离子交换型的吸附树脂上吸收所得磷酸溶液的方法，从含有它的磷酸流中除去镉。
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公开(公告)号：EP0161704A3
公开(公告)日：1988-06-22
申请号：EP85200559
申请日：1985-04-12
IPC分类号： C01B25/28
CPC分类号： C01B25/28
摘要： A process is disclosed for the production of water soluble ammonium phosphates, comprising the following steps:
a) to react in a reaction step ammonia and untreated phosphoric acid with P 2 0 5 concentration, comprised within the range of from 30 to 54% outcoming from wet processes; b) to filter under high temperature conditions the reaction suspension, separating the impurity-containing sludges from an aqueous solution of ammonium phosphate; c) to cool and crystallize the aqueous solution of ammonium phosphate; d) to separate the formed ammonium phosphate crystals from the mother liquors.-
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公开(公告)号：EP0254349A3
公开(公告)日：1988-08-31
申请号：EP87201303
申请日：1987-07-08
IPC分类号： C01B33/107
CPC分类号： C01B33/10705
摘要： A continuous process is disclosed for the production, with a high yield, of high purity silicon tetrafluoride, by starting from an aqueous solution of fluosilicic acid, which comprises:
a) the reaction of an aqueous solution of fluosilicic acid with concentrated sulphuric acid, carried out with a short residence time and preferably under fluido-dynamic conditions of turbulence, inside a reaction zone; b) the separation of a gaseous stream containing silicon tetrafluoride from a liquid stream of aqueous sulphuric acid, carried out inside a separation zone, directly connected with the reaction zone; c) the washing, with concentrated and cold sulphuric acid, of said gaseous stream, carried out inside a washing zone, for the purpose of separating a gaseous stream of purified silicon tetrafluoride; and, possibly d) the further purification of said gaseous stream of purified silicon tetrafluoride, by means of techniques of adsorption on an adsorbent solid material.-
5.发明公开Process for the production of silicon tetrafluoride 失效Verfahren zur Herstellung von Silizium-Tetrafluorid。
公开(公告)号：EP0254349A2
公开(公告)日：1988-01-27
申请号：EP87201303.2
申请日：1987-07-08
IPC分类号： C01B33/107
CPC分类号： C01B33/10705
摘要： A continuous process is disclosed for the production, with a high yield, of high purity silicon tetrafluoride, by starting from an aqueous solution of fluosilicic acid, which comprises:
a) the reaction of an aqueous solution of fluosilicic acid with concentrated sulphuric acid, carried out with a short residence time and preferably under fluido-dynamic conditions of turbulence, inside a reaction zone;
b) the separation of a gaseous stream containing silicon tetrafluoride from a liquid stream of aqueous sulphuric acid, carried out inside a separation zone, directly connected with the reaction zone;
c) the washing, with concentrated and cold sulphuric acid, of said gaseous stream, carried out inside a washing zone, for the purpose of separating a gaseous stream of purified silicon tetrafluoride; and, possibly
d) the further purification of said gaseous stream of purified silicon tetrafluoride, by means of techniques of adsorption on an adsorbent solid material.摘要翻译： 公开了通过从氟硅酸的水溶液开始以高产率生产高纯度四氟化硅的连续方法，其包括：a）将氟硅酸水溶液与浓硫酸反应，携带 在反应区内，停留时间短，优选在流动动力条件下的湍流; b）从与反应区直接连接的分离区内部进行含有四氟化硅的气态物流与硫酸水溶液的分离; c）用浓缩和冷的硫酸洗涤在洗涤区内进行的所述气流，以分离纯化的四氟化硅的气流; 并且可能d）通过在吸附剂固体材料上的吸附技术进一步纯化所述纯化四氟化硅的气流。 Ø
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公开(公告)号：EP0200073A3
公开(公告)日：1987-10-14
申请号：EP86105102
申请日：1986-04-14
IPC分类号： C05B11/08
CPC分类号： C05B11/08
摘要： A process is disclosed for the production of ammonium phosphates starting from phosphate rocks, comprising a grinding of such rocks, a chemical attack with sulphuric acid and ammonium sulphate, and a filtration of the reaction pulp, characterized in that the chemical treatment of the rocks is carried out in one single stage under isothermal conditions at a temperature ranging from 70 of 90°C.
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公开(公告)号：EP0200073A2
公开(公告)日：1986-12-10
申请号：EP86105102.7
申请日：1986-04-14
IPC分类号： C05B11/08
摘要： A process is disclosed for the production of ammonium phosphates starting from phosphate rocks, comprising a grinding of such rocks, a chemical attack with sulphuric acid and ammonium sulphate, and a filtration of the reaction pulp, characterized in that the chemical treatment of the rocks is carried out in one single stage under isothermal conditions at a temperature ranging from 70 of 90°C.
摘要翻译： 公开了一种从磷酸盐岩石开始生产磷酸铵的方法，包括研磨这些岩石，用硫酸和硫酸铵进行化学侵蚀，以及过滤反应纸浆，其特征在于岩石的化学处理是 在等温条件下在90℃70℃的温度下在单一阶段进行。
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公开(公告)号：EP0463674A3
公开(公告)日：1993-12-29
申请号：EP91201484.2
申请日：1991-06-14
发明人： Anania, Guido , Cultrera, Vito , Blanca, Domenico
IPC分类号： C22B3/24 , C01B25/238
CPC分类号： C01B25/238 , C01G11/003 , C22B3/24 , Y02P10/234
摘要： Cadmium is removed from phosphoric acid streams containing it by a process comprising initially treating the stream concerned with halide ions and metallic iron, followed by absorbing the resultant phosphoric solution on adsorption resin not of ion exchange type.
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公开(公告)号：EP0254349B1
公开(公告)日：1992-05-13
申请号：EP87201303.2
申请日：1987-07-08
IPC分类号： C01B33/107
CPC分类号： C01B33/10705
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公开(公告)号：EP0161704A2
公开(公告)日：1985-11-21
申请号：EP85200559.4
申请日：1985-04-12
IPC分类号： C01B25/28
CPC分类号： C01B25/28
摘要： A process is disclosed for the production of water soluble ammonium phosphates, comprising the following steps:
a) to react in a reaction step ammonia and untreated phosphoric acid with P 2 0 5 concentration, comprised within the range of from 30 to 54% outcoming from wet processes;
b) to filter under high temperature conditions the reaction suspension, separating the impurity-containing sludges from an aqueous solution of ammonium phosphate;
c) to cool and crystallize the aqueous solution of ammonium phosphate;
d) to separate the formed ammonium phosphate crystals from the mother liquors.
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