公开(公告)号：US5474753A

公开(公告)日：1995-12-12

申请号：US243076

申请日：1994-05-16

申请人： Dominique Bretaudeau ,  Francois Delprato ,  Marc Malassis

发明人： Dominique Bretaudeau ,  Francois Delprato ,  Marc Malassis

IPC分类号： C11D3/12 ,  C01B39/14

CPC分类号： C11D3/128 ,  C01B33/2823 ,  Y10S423/24

摘要： Crystalline 4A zeolites having high calcium ion exchange capacity, well adapted as builder materials for detergent compositions, are prepared by directly admixing an aqueous sodium silicate solution with a first aqueous sodium aluminate solution in a first reaction vessel to form a hydrogel therefrom, and transferring the hydrogel thus formed to a discrete crystallization zone and therein contacting such hydrogel with a crystallization-effecting amount of a second aqueous sodium aluminate solution to convert same into a crystalline 4A zeolite, and, advantageously, filtering, washing and optionally drying such crystalline 4A zeolite.

摘要翻译： 通过在第一反应容器中直接将硅酸钠水溶液与第一铝酸钠水溶液直接混合以形成水凝胶来制备具有高钙离子交换能力的结晶4A沸石，其良好适用于洗涤剂组合物的助洗剂材料， 水凝胶如此形成为离散的结晶区，并且其中使这种水凝胶与结晶效应量的第二铝酸钠水溶液接触以将其转化为结晶4A沸石，并且有利地过滤，洗涤和任选地干燥此类结晶4A沸石。