-
1.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。
-
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。
-
3.发明授权
公开(公告)号：US5236682A
公开(公告)日：1993-08-17
申请号：US846758
申请日：1992-03-05
CPC分类号： C01B33/325 , C01B33/32 , C01B33/38
摘要： For producing crystalline sodium silicates having a layer structure, an SiO.sub.2 /Na.sub.2 O molar ratio of (1.9 to 2.1):1 and a water content of less than 0.3% by weight from a waterglass solution containing at least 20% by weight of solids, the waterglass 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 2.3):1 at temperatures of 180.degree. 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.degree. to 300.degree. C. for a residence time of 10 to 25 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, amorphous, water-containing 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 more than 500.degree. up to 850.degree. C. for 1 to 60 minutes to form crystalline soidium silicate. The rotary kiln is here insulated in such a way that its outside wall temperature is less than 60.degree. C. Finally, the crystalline 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： 为了生产具有层状结构的结晶硅酸钠，SiO 2 / Na 2 O摩尔比为（1.9-2.1）：1，水含量小于含有至少20重量％固体的水玻璃溶液的0.3重量％ 通过使SiO 2 / Na 2 O摩尔比为（2.0〜2.3）：1的石英砂与氢氧化钠溶液在180〜240℃的温度和10〜30巴的压力下反应获得水玻璃溶液。 该水玻璃溶液在200℃至300℃的热空气的喷雾干燥区中处理，停留时间为10至25秒，并且在离开喷雾干燥区的出口气体的温度为90°至130° 以形成具有15至23重量％的含水量（以700℃测定的点火损失确定）的粉末状无定形硅酸钠，堆积密度大于300g / l。 将粉末状，无定形含水硅酸钠引入倾斜布置的回转窑中，该回转窑装有固体移动装置，并在大于500℃至850℃的温度下逆流处理烟气1至60分钟 以形成硅酸的结晶硅酸盐。 回转窑的外壁温度低于60℃，最后将回转窑中出现的结晶硅酸钠粉碎成0.1〜12mm的粒度粉碎机。
-
公开(公告)号：US5268156A
公开(公告)日：1993-12-07
申请号：US839935
申请日：1992-02-21
CPC分类号： C01B33/38
摘要： To prepare crystalline sodium silicates having a laminated 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 from a water glass solution which has a solids content of at least 20% by weight and is obtained by reaction of sand with sodium hydroxide solution in a molar ratio of SiO.sub.2 : Na.sub.2 O of (2.0 to 2.3) : 1, the water glass solution is treated with hot air of 200.degree. to 300.degree. C. in a spray drying zone 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. The pulverulent, amorphous, water-containing sodium silicate is first ground, preferably to particle sizes of 1 to 50 .mu.m, before it is introduced into an inclined rotary tubular oven and treated in this in countercurrent with flue gas at temperatures of more than 500.degree. to 850.degree. C. to form crystalline sodium silicate. The sodium silicate issuing from the rotary tubular oven is first comminuted to particle sizes of 0.1 to 12 mm and finally ground to particle sizes of 2 to 400 .mu.m.
摘要翻译： 为了制备具有层压结构的结晶硅酸钠，（1.9-2.1）1的SiO 2与Na 2 O的摩尔比和固含量至少为20％的水玻璃溶液的含水量小于0.3重量％ ，通过砂（SiO 2 :Na 2 O）摩尔比为（2.0〜2.3）：1的砂与氢氧化钠溶液的反应得到，水玻璃溶液用200〜300℃的热风喷雾 干燥区形成15〜23重量％的含水量（以700℃测定为灼烧损失的粉末状）无定形硅酸钠。 粉末状，无定形的含水硅酸钠首先被研磨，优选为1至50μm的粒度，然后将其引入倾斜的旋转管式炉中，并在与500℃以上的温度下与烟道气逆流处理 DEG至850℃，形成结晶硅酸钠。 从旋转管式炉排出的硅酸钠首先粉碎成0.1〜12mm的粒径，最后研磨成2〜400μm的粒径。
-
公开(公告)号：US5183651A
公开(公告)日：1993-02-02
申请号：US635933
申请日：1990-12-28
CPC分类号： C01B33/38
摘要： To prepare crystalline sodium silicates having a layer structure and the formula Na.sub.2 Si.sub.x O.sub.2x+1, in which x is between 2 and 3, sand and soda are first fused in a molar ratio of SiO.sub.2 /Na.sub.2 O of 2 to 3.5 at temperature of 1200.degree. to 1400.degree. C. The water-glass obtained in pieces after the melt has cooled is ground to particle sizes of less than 2 mm before it is treated at temperatures of 600.degree. to 800.degree. C. for 10 to 120 minutes in an elongated reaction zone with mechanical circulation. Finally, the material leaving the reaction zone is ground to a particle fineness of less than 1 mm.
摘要翻译： 为了制备具有层结构的结晶硅酸钠和其中x在2和3之间的式Na2SixO2x + 1，首先在1200至1400的温度下以SiO 2 / Na 2 O的摩尔比2至3.5熔融砂和苏打 将熔融物冷却后的片状水玻璃研磨至小于2mm的粒度，然后在600℃至800℃的温度下在延长的反应区域中处理10至120分钟， 机械循环。 最后，将离开反应区的材料研磨成小于1mm的颗粒细度。
-
6.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。
-
公开(公告)号：US6099595A
公开(公告)日：2000-08-08
申请号：US27891
申请日：1998-02-23
申请人： Josef Holz , Gunther Schimmel , Alexander Tapper , Volker Thewes
发明人： Josef Holz , Gunther Schimmel , Alexander Tapper , Volker Thewes
IPC分类号： C01B33/32 , C01B33/38 , C11D3/08 , C11D3/12 , B01D9/00 , C01D1/30 , C01D33/00 , C01D33/20 , C01D33/32
CPC分类号： C01B33/38 , C11D3/1273
摘要： The invention relates to a process for the preparation of crystalline sodium silicates having a sheet structure and high .delta. phase content from water glass, which has been prepared hydrothermally, by dehydration of the water glass and subsequent crystallization at elevated temperature, which comprises treating the water glass at temperatures of from 50 to 140.degree. C. prior to dehydration.
摘要翻译： 本发明涉及一种通过水玻璃脱水并随后在升高的温度下结晶而制备具有水玻璃的片状结构和高δ相含量的结晶硅酸钠的方法，该方法包括处理水 在脱水之前的温度为50至140℃的玻璃。
-
公开(公告)号：US6036733A
公开(公告)日：2000-03-14
申请号：US027531
申请日：1998-02-23
申请人： Josef Holz , Gunther Schimmel , Alexander Tapper , Volker Thewes
发明人： Josef Holz , Gunther Schimmel , Alexander Tapper , Volker Thewes
CPC分类号： C11D3/1273 , C01B33/38
摘要： The invention relates to a process for the preparation of crystalline sodium silicates having a sheet structure and high .delta. phase content from water glass, which has been prepared predominantly hydrothermally, by dehydration of the water glass and subsequent crystallization at elevated temperature, wherein the water glass is a mixture of water glass prepared hydrothermally and tank furnace water glass, and also to its use.
摘要翻译： 本发明涉及通过水玻璃的脱水和随后的高温结晶，制备具有主要水热制备的片状结构和高δ相含量的结晶硅酸钠的方法，其中水玻璃 是水热玻璃和水箱玻璃水玻璃的混合物，也是它的用途。
-
公开(公告)号：US5520860A
公开(公告)日：1996-05-28
申请号：US297227
申请日：1994-08-29
CPC分类号： C01B33/325 , B01J2/22 , C11D11/0088 , C11D17/0039 , C11D3/08 , C11D3/1273
摘要： To prepare a compacted, granular sodium silicate having an SiO.sub.2 /Na.sub.2 O molar ratio of 1.7:1 to 4.1:1, sodium silicate having a median particle diameter of
摘要翻译： 为了制备SiO 2 / Na 2 O摩尔比为1.7:1至4.1:1的压实的粒状硅酸钠，首先将中值粒径<500μm的硅酸钠与增加其硬度的材料混合，然后再转化成压制 通过压实，粉碎和筛选，粒径为0.1至5mm的颗粒。
-
公开(公告)号：US5874397A
公开(公告)日：1999-02-23
申请号：US675991
申请日：1996-07-09
CPC分类号： C11D3/1273 , C11D3/10
摘要： The invention relates to a granular detergent builder in the form of cogranules of a mixture of sodium bicarbonate and crystalline sheet silicates of the formula NaMSi.sub.x O.sub.2x+1 *yH.sub.2 O, where M is sodium or hydrogen, x is a number from 1.9 to 4, and y is a number from 0 to 20, whereina) the granular detergent builder contains 5 to 50% by weight of crystalline sheet silicate and 50 to 95% by weight of sodium bicarbonate;b) has a pH of .ltoreq.10 in 1% strength solution in distilled water;c) has a calcium-binding capacity of .gtoreq.150 mg Ca/g (30.degree. German hardness) and a magnesium-binding capacity of .gtoreq.4 mg Mg/g (3.degree. German hardness), andd) has an apparent density of .gtoreq.850 g/l.The invention likewise relates to a process for the production of such a granular detergent builder, and to its use in detergents and cleaners.
摘要翻译： 本发明涉及碳酸氢钠和式NaMSixO 2 x + 1 * yH 2 O的结晶片状硅酸盐的混合物形式的颗粒状洗涤剂助洗剂，其中M为钠或氢，x为1.9至4的数，y为 是0至20的数，其中a）颗粒洗涤剂助洗剂含有5至50重量％的结晶硅酸盐和50至95重量％的碳酸氢钠; b）在1％浓度的蒸馏水溶液中具有 / = 150mg Ca / g（30德国硬度）和≥4mgMg / g（3德国硬度）的镁结合能力的钙结合能力，以及d）具有 表观密度> 850g / l。 本发明同样涉及一种生产这种颗粒状洗涤剂助洗剂的方法及其在洗涤剂和清洁剂中的应用。
-
-
-
-
-
-
-
-
-
搜索结果
47 条记录 (耗时 0.022 秒)
