公开(公告)号：EP1184338A1

公开(公告)日：2002-03-06

申请号：EP01307245.9

申请日：2001-08-24

申请人： THE BOC GROUP, INC.

发明人： Ojo, Adeola Florence ,  Fitch, Frank Roger ,  Bulow, Martin ,  Gittleman, Craig Seth ,  Sudhakar, Reddy Jale

IPC分类号： C01B39/22

CPC分类号： C01B39/22 ,  B01D2257/102 ,  B01D2257/11 ,  B01D2257/402 ,  B01D2257/404 ,  B01D2257/504 ,  B01D2257/702 ,  B01J20/18 ,  B01J20/186 ,  Y02C10/08 ,  Y02C20/10 ,  Y10S423/21

摘要： Sodium X zeolite containing little or no sodium A zeolite as by-product, is prepared by direct synthesis from a uniform, substantially potassium ion free aqueous reaction / mixture comprising silica, alumina and sodium ions, the concentration of the components in the reaction mixture being such that the silica/alumina molar ratio is in the range of about 2.1:1 to about 3.0:1, the sodium oxide/silica ratio is in the range of about 1.2:1 to about 2.5:1 and the water / sodium oxide molar ratio is greater than about 35:1.
The crystallization step is carried out by maintaining the reaction mixture at a temperature below about 70° C, but preferably equal to or above 50° C for the duration of the crystallization step. Preferably, the ratios of components in the solutions used to make the reaction mixture are such that in the reaction mixture the silica/alumina molar ratio will be in the range of about 2.25:1 to about 2.4:1; the sodium oxide to silica molar ratio will be in the range 1.6:1 to about 1.9:1; and the water to sodium oxide molar ratio will be greater than about 60:1. The reaction mixture is preferably prepared as a hydrogel.

摘要翻译： 通过从包含二氧化硅，氧化铝和钠离子的均匀的基本上不含钾离子的含水反应/混合物直接合成制备含有很少或不含有钠A沸石的X沸石钠，反应混合物中组分的浓度为 使得二氧化硅/氧化铝的摩尔比在约2.1:1至约3.0:1的范围内，氧化钠/二氧化硅的比例在约1.2:1至约2.5:1的范围内，水/氧化钠摩尔 比例大于约35：1。 在结晶步骤的持续时间内，将反应混合物保持在低于约70℃，但优选等于或高于50℃的温度下进行结晶步骤。 优选地，用于制备反应混合物的溶液中的组分的比例使得在反应混合物中，二氧化硅/氧化铝的摩尔比将在约2.25:1至约2.4:1的范围内; 氧化钠与二氧化硅的摩尔比将在1.6:1至1.9:1的范围内; 并且水与氧化钠的摩尔比将大于约60:1。 反应混合物优选制备为水凝胶。