A new technology for preparation of sodium fluoride from silicofluoric acid was tested for comprehensive utilization of silicofluoric acid, a byproduct from phosphate fertilizer plant. 为了综合利用磷肥生产副产的氟硅酸,对氟硅酸制氟化钠工艺进行了研究。
The results showed that the retarding effect of the retarders is citric acid> sodium citrate> tartaric acid> potassium sodium tartrate> sugar> phosphate. 缓凝剂对β半水膏的缓凝效果:柠檬酸>柠檬酸钠>酒石酸>酒石酸钾钠>蔗糖>磷酸盐。
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;