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美国P＆G公司宣布，制出了一种磷酸盐的代用品—泡沸石，即铝硅酸钠。A型泡沸石是铝硅酸钠晶体，是一种离子交换剂，可作为助洗剂。它的实验式是M_(2/n)O·Al_2O_3·XSiO_2·YH_2O，共中M可代表钠、镁、钙、钡等阳离子，n为阳离子价，X等于或大于2，Y为水的克分子数。在正常的洗涤条件下，A型泡沸石是不溶于水的。它是通过多相体系的阳离子交换过程使水软化。每克A型水合泡沸石的理论结合力是5.5毫当量金属离子，即相当于275毫克碳酸钙。在实际上达不到这一水平。在洗涤过程中，助洗剂软化作用的动力学是很重要的。在洗涤过程开始阶段尤为重要，在这时，阴离活性剂和污垢都争着要同硬度离子结合，所以除硬作用必须迅速。三聚磷酸钠或NTA除去硬度离子的速度是很快的。A型泡沸石就较慢，但比
P & G announced the United States made a phosphate substitute - zeolite, that is, sodium aluminosilicate. Type A zeolite is sodium aluminosilicate crystals, is an ion exchanger, can be used as a builder. Its experimental formula is M_ (2 / n) O · Al_2O_3 · XSiO_2 · YH_2O, wherein the common M can represent cations such as sodium, magnesium, calcium and barium, n is the cation valence, X is equal to or greater than 2, and Y is water Number of molecules. Type A zeolite is insoluble in water under normal wash conditions. It softens water through the cation exchange process of heterogeneous systems. The theoretical bond per gram of Type A hydratable zeolite is 5.5 milliequivalents of metal ions, which corresponds to 275 mg of calcium carbonate. In fact, reach this level. The kinetics of builder softening during the washing process are important. This is particularly important at the beginning of the washing process, at which point anionic agents and soils are scrambling to bind to the hardness ions, so the hard action must be rapid. Sodium tripolyphosphate or NTA removal of hardness ions is very fast. Type A zeolite is slower, but more