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公开(公告)号：US4971778A
公开(公告)日：1990-11-20
申请号：US508891
申请日：1990-04-12
IPC分类号： C01B25/027 , C01B25/18 , C01B25/238 , C01B25/24
CPC分类号： C01B25/24 , C01B25/027 , C01B25/18 , C01B25/238
摘要： For working up concentrated, preferably partially condensed phosphoric acid which is contaminated with organic components, the phosphoric acid is first thoroughly mixed with fine-grained sand in a weight ratio of (0.5 to 1.5):1. Then, to neutralize the mixture, a basic, oxygen-containing calcium compound is added, while the thorough mixing is continued, until a 10% aqueous suspension of the mixture to which the calcium compound has been added has a pH between 5 and 11. Finally, the mixture which contains the calcium compound is commminuted after cooling.
摘要翻译： 为了处理被有机成分污染的浓缩的，优选部分缩合的磷酸，磷酸首先以（0.5-1.5 ):1的重量比与细粒砂完全混合。 然后，为了中和混合物，加入碱性含氧钙化合物，同时继续充分混合，直到加入钙化合物的混合物的10％水悬浮液的pH为5至11。 最后，冷却后将含有钙化合物的混合物粉碎。
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2.发明授权
公开(公告)号：US4906445A
公开(公告)日：1990-03-06
申请号：US311640
申请日：1989-02-16
IPC分类号： C01B25/234 , C01B25/235 , C01B25/46
CPC分类号： C01B25/461 , C01B25/235
摘要： A continuous process is indicated for complete removal of organic impurities from and complete decolorization of pre-purified wet-process phosphoric acid which has been purified by an extractive method using an organic solvent, freed from residual hydrofluoric acid by steam stripping and treated with hydrogen peroxide at elevated temperature, which comprises mixing the pre-purified wet-process phosphoric acid and the hydrogen peroxide in a mixing zone at a temperature of from 100.degree. to 200.degree. C., preferably 140.degree. to 160.degree. C., and allowing them to react at this temperature for a further 1 to 4 hours, cooling to from 85.degree. to 90.degree. C. the pre-purified wet-process phosphoric acid treated in this way and pumping it at this temperature with exclusion of air firstly through an activated charcoal bed which has been prepared on the basis of peat and has been steam-activated and has a BET surface area of from 800 to 1000 m.sup.2 /g, and subsequently through a silicon carbide and/or graphite bed while maintaining a pumping rate of less than 0.5 m.sup.3 /h of wet-process phosphoric acid per m.sup.3 of activated charcoal bed.
摘要翻译： 指示完全除去有机杂质并完全脱色预纯化的湿法磷酸的连续方法，其通过萃取方法使用有机溶剂纯化，通过汽提除去残留的氢氟酸并用过氧化氢处理 在高温下，其包括在预先纯化的湿法磷酸和过氧化氢的混合区中在100至200℃，优选140至160℃的温度下混合，并使它们 在该温度下再反应1至4小时，冷却至85℃至90℃，预纯化的湿法磷酸以此方式处理并在该温度下泵送，首先通过活性炭排除空气 基于泥炭制备并已蒸汽活化并具有800至1000m2 / g的BET表面积的床，随后通过碳化硅和/或石墨b 同时保持每立方米活性炭床的湿法磷酸的泵送速率小于0.5m 3 / h。
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公开(公告)号：US5229095A
公开(公告)日：1993-07-20
申请号：US839008
申请日：1992-02-14
IPC分类号： C01B33/32
CPC分类号： C01B33/325 , C01B33/32
摘要： A process for producing amorphous sodium silicates having a water content of 0.3 to 6% by weight and an SiO.sub.2 /Na.sub.2 O molar ratio of (1.9 to 2.8) : 1 from a waterglass solution containing at least 20% by weight of solids, the water-glass solution is obtained by reacting quartz sand with sodium hydroxide solution at an SiO.sub.2 /Na.sub.2 O molar ratio of (2.0 to 2.8) : 1 at temperatures of 180 to 240.degree. C. and pressures of 10 to 30 bar. This waterglass solution is treated in a spray-drying zone with hot air at 200 to 300.degree. C. for a residence time of 10 to 20 seconds and at a temperature of the exit gas leaving the spray-drying zone of 90.degree. to 130.degree. C., to form a pulverulent amorphous sodium silicate having a water content (determined as the loss on ignition at 700.degree. C.) of 15 to 23% by weight and a bulk density of more than 300 g/l. The pulverulent sodium silicate is introduced into an obliquely arranged rotary kiln fitted with devices for moving solids and treated therein with flue gas in countercurrent at temperatures from 250.degree. up to 500.degree. C. for 1 to 60 minutes. The rotary kiln is here insulated in such a way that its outside wall temperature is less than 60.degree. C. Finally, the amorphous sodium silicate emerging from the rotary kiln is comminuted by means of a mechanical crusher to grain sizes of 0.1 to 12 mm.
摘要翻译： 从含有至少20重量％固体的水玻璃溶液制备水含量为0.3-6重量％和SiO 2 / Na 2 O摩尔比为（1.9至2.8）：1的无定形硅酸钠的方法， 通过在180-240℃的温度和10至30巴的压力下使石英砂与氢氧化钠溶液以（2.0至2.8）：1的SiO 2 / Na 2 O摩尔比反应获得玻璃溶液。 该水玻璃溶液在200〜300℃的热风喷雾干燥区中处理10〜20秒的停留时间，离开喷雾干燥区的出口气体的温度为90〜130℃ 以形成15〜23重量％的含水量（在700℃下测定为灼烧损失）的粉末状无定形硅酸钠，堆积密度大于300g / l。 将粉状硅酸钠引入倾斜布置的旋转窑中，该回转窑装有用于移动固体的装置，并在250℃至500℃的温度下逆流处理烟道气1至60分钟。 回转窑的外壁温度低于60℃，最后将回转窑出现的无定形硅酸钠粉碎成0.1〜12mm的粒径。
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公开(公告)号：US4777025A
公开(公告)日：1988-10-11
申请号：US37985
申请日：1987-04-13
申请人： Werner Kowalski , Theo Dahmen , Hans Haas , Gunther Schimmel
发明人： Werner Kowalski , Theo Dahmen , Hans Haas , Gunther Schimmel
IPC分类号： C01B25/12
CPC分类号： C01B25/12
摘要： Hexagonal phosphorus pentoxide of diminished reactivity is made by burning liquid yellow phosphorus with a mixture of dry air and pure oxygen inside a combustion zone with the resulting formation of a gas stream containing phosphorus pentoxide; next, the gas stream coming from the combustion zone is passed initially through an intermediary zone indirectly cooled by means of fluidized matter and then through a condensing zone fitted with an immersion tube indirectly cooled by means of fluidized matter; the gas stream is passed through the immersion tube at a mean temperature of 450.degree. to 600.degree. C. and allowed to remain in the immersion tube over a period of 2 to 5 seconds.
摘要翻译： 通过在燃烧区内用干燥空气和纯氧的混合物燃烧液体黄磷，形成含有五氧化二磷的气流，从而产生反应性降低的六
价五氧化二磷。 接下来，来自燃烧区的气流首先通过间接通过流化物质冷却的中间区，然后通过装配有通过流化物质间接冷却的浸入管的冷凝区; 气流在450〜600℃的平均温度下通过浸入管，并在2〜5秒的时间内保持在浸入管内。-
5.发明授权
公开(公告)号：US4762693A
公开(公告)日：1988-08-09
申请号：US039792
申请日：1987-04-16
IPC分类号： B01D11/04 , C01B25/238 , C01B25/46 , C01G1/02 , C22B3/38
CPC分类号： C01B25/238 , C22B3/007 , C22B3/24 , Y02P10/234
摘要： Residue obtained upon the removal of heavy metal contaminants from crude phosphoric acid by means of a dialkyldithiophosphoric acid ester and adsorbent is worked up into ecologically reliable solid matter and into a heavy metal concentrate. The solid matter and heavy metal concentrate are separated from one another by successive mechanical and chemical treatment. The sequential order of these two operational steps can be inversed.
摘要翻译： 通过二烷基二硫代磷酸酯和吸附剂从粗磷酸中除去重金属污染物后获得的残留物被加工成生态可靠的固体物质并重金属浓缩物。 通过连续的机械和化学处理将固体物质和重金属浓缩物彼此分离。 这两个操作步骤的顺序可以颠倒。
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公开(公告)号：US4629614A
公开(公告)日：1986-12-16
申请号：US794507
申请日：1985-11-04
申请人： Gunther Schimmel , Reinhard Gradl
发明人： Gunther Schimmel , Reinhard Gradl
IPC分类号： C01B25/234 , C01B25/237 , C01B25/46 , C01B25/16
CPC分类号： C01B25/237 , C01B25/461 , C01B25/462
摘要： Wet-process phosphoric acid prepurified by liquid/liquid extraction with an organic solvent is decontaminated. To this end, the prepurified acid is first freed from residual extractant, then stripped with steam or hot gas, contacted with a dialkyldithiophosphoric acid ester and a fine particulate adsorbent, and liquid phase material is ultimately treated with steam and hydrogen peroxide.
摘要翻译： 通过液体/液体萃取用有机溶剂预处理的湿法磷酸被去污染。 为此，首先将预纯化的酸从残留的萃取剂中除去，然后用蒸汽或热气汽提，与二烷基二硫代磷酸酯和细颗粒吸附剂接触，最后用蒸汽和过氧化氢处理液相物质。
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公开(公告)号：US4620966A
公开(公告)日：1986-11-04
申请号：US619057
申请日：1984-06-11
申请人： Gunther Schimmel , Herbert Ressel , Gero Heymer , Reinhard Gradl
发明人： Gunther Schimmel , Herbert Ressel , Gero Heymer , Reinhard Gradl
CPC分类号： C01B25/308
摘要： The disclosure relates to a process for defluorinating alkali metal phosphate solutions. To this end, the disclosure provides for an alkali metal phosphate solution neutralized to a pH-value of more than 6 and pre-purified to be stirred at 60.degree. to 120.degree. C. into an alkaline earth metal compound. Alkaline earth metal compounds with a solubility in water of less than 5 g/l are used in the form of particles of which more than 50% have a size of less than 8 .mu.m. After a reaction period of 0.5 to 4 hours, the precipitate obtained is separated from the purified alkali metal phosphate solution.
摘要翻译： 本公开涉及一种氟化碱金属磷酸盐溶液的方法。 为此，本公开内容提供将中和至pH值大于6并经60℃至120℃预纯化以进入碱土金属化合物的碱金属磷酸盐溶液。 在水中的溶解度小于5g / l的碱土金属化合物以超过50％的尺寸小于8μm的颗粒的形式使用。 反应时间为0.5〜4小时后，从纯化的碱金属磷酸盐溶液中分离得到的沉淀物。
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8.发明授权
公开(公告)号：US5895637A
公开(公告)日：1999-04-20
申请号：US723025
申请日：1996-09-30
申请人： Jan Wilkens , Gunther Schimmel , Alexander Tapper
发明人： Jan Wilkens , Gunther Schimmel , Alexander Tapper
CPC分类号： C11D3/1273 , C01B33/38 , C11D3/08
摘要： The invention relates to a process for preparing sodium disilicate in the .beta. form having a high ion-exchange capacity and a molar ratio Na.sub.2 O:SiO.sub.2 of about 1:2 from a silicate source and sodium hydroxide solution at elevated temperature, with the product formed being separated off by filtration, wherein the product is further heat treated at from 450.degree. to 780.degree. C. and/or is pressed to form compact parts.
摘要翻译： 本发明涉及一种在硅酸盐源和氢氧化钠溶液中在升高的温度下制备具有高离子交换能力和约1:2的Na 2 O:SiO 2的摩尔比为β形式的二硅酸钠的方法，其中形成的产物为 通过过滤分离，其中产物在450℃至780℃进一步热处理和/或被压制以形成紧凑的部件。
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9.发明授权Process for the preparation of a mixture of sodium silicates and other salts and the use of the mixture 失效制备硅酸钠和其他盐的混合物的方法以及该混合物的用途
公开(公告)号：US5507972A
公开(公告)日：1996-04-16
申请号：US286744
申请日：1994-08-05
申请人： Harald Bauer , Gunther Schimmel
发明人： Harald Bauer , Gunther Schimmel
CPC分类号： C11D3/1273 , C11D3/10
摘要： To prepare a mixture of sodium silicates having lamellar structure and sodium carbonate peroxohydrate, sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 is reacted at least partially with carbon dioxide and atomized water with continuous circulation with the formation of a kanemite/sodium hydrogen carbonate mixture. The kanemite/sodium hydrogen carbonate mixture and further sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 is brought into contact with atomized water with continuous circulation. Finally, 0.015 to 1.5 mol of hydrogen peroxide per mole of sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 employed is added to the resulting kanemite/sodium carbonate mixture.
摘要翻译： 为了制备具有层状结构的硅酸钠和碳酸钠过氧化物水合物的混合物，基本上由δ-Na 2 Si 2 O 5组成的硅酸钠至少部分地与二氧化碳和雾化水反应，连续循环形成一种卡米土/碳酸氢钠混合物。 基本上由δ-Na 2 Si 2 O 5组成的可卡因/碳酸氢钠混合物和另外的硅酸钠与连续循环的雾化水接触。 最后，将0.015至1.5摩尔过氧化氢/基本上由所用的δ-Na 2 Si 2 O 5组成的硅酸钠加入到所得的卡米质/碳酸钠混合物中。
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10.发明授权Process for the production of crystalline sodium disilicate in an externally heated rotary kiln having temperature zones 失效在具有温度区域的外部加热回转窑中生产结晶二硅酸钠的方法
公开(公告)号：US5308596A
公开(公告)日：1994-05-03
申请号：US986983
申请日：1992-12-08
CPC分类号： C01B33/38
摘要： To prepare crystalline sodium disilicates having a laminar structure, a molar ratio of SiO.sub.2 to Na.sub.2 O of (1.9 to 2.1) 1 and a water content of less than 0.3% by weight, a water glass solution is first obtained by reacting sand with sodium hydroxide solution in a molar ratio of SiO.sub.2 to Na.sub.2 O of (2.0 to 2.3) : 1 at temperatures of 180.degree. to 240.degree. C. and pressures of 10 to 30 bar. This water glass solution having at least 20% by weight of solids is treated in a spray drier with hot air at 200.degree. to 300.degree. C. with the formation of a pulverulent amorphous sodium disilicate having a water content (determined as loss on heating at 700.degree. C.) of 15 to 23% by weight and a bulk density of at least 300 g/l. The spray-dried pulverulent, amorphous sodium disilicate is ground. The ground sodium disilicate is introduced into a rotary kiln equipped with devices for moving solids, externally heated via the wall and having in its interior a plurality of different temperature zones, and is treated therein at temperatures of 400.degree. to 800.degree. C. for 1 to 60 minutes with formation of crystalline sodium disilicate.
摘要翻译： 为了制备具有层状结构，SiO 2与Na 2 O的摩尔比（1.9-2.1）1和含水量小于0.3重量％的结晶二硅酸钠，首先通过使沙子与氢氧化钠溶液 在180至240℃的温度和10至30巴的压力下，SiO 2与Na 2 O的摩尔比为（2.0至2.3）：1。 具有至少20重量％固体的水玻璃溶液在喷雾干燥器中用200-300℃的热空气处理，形成具有水分含量的粉状无定形二硅酸钠（确定为在 700℃）为15〜23重量％，堆积密度为300g / l以上。 将喷雾干燥的粉状无定形二硅酸钠研磨。 将磨碎的二硅酸钠引入装备有用于移动固体的装置的回转窑，其外部经由壁加热并在其内部具有多个不同的温度区域，并在400℃至800℃的温度下处理1 至60分钟，形成结晶二硅酸钠。
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