sodium metasilicate

Zeolite ( 4A) and sodium metasilicates are largely used as phosphate-free detergent builders in industry. There is a potential pollution because of the zeolite containing Al 3+. The softening water capability of sodium metasilicate is poor.

目前工业上大量使用的无磷洗涤助剂为4A沸石和偏硅酸钠，4A存在潜在的铝污染问题，而偏硅酸钠的抗硬水性差。

New technology for preparation of sodium metasilicate with crystal water from rice husk

稻壳制备含结晶水偏硅酸钠新工艺研究

The status quo of the research on phosphate free builders is introduced and the properties of 4A zeolite, sodium metasilicate, sodium polyacrylate, zeolite P, sodium salt of maleic anhydride acrylic acid copolymer, layered crystal sodium disilicate as phosphate free builders are reviewed.

综述了无磷洗涤助剂的开发进展，并对4A沸石、偏硅酸钠、聚丙烯酸钠、沸石P、顺丁烯二酸酐丙烯酸共聚物钠盐、层状结晶二硅酸钠等助剂的性能作了评述；