ppty
- 网络人丝高弹丝;人造丝高弹丝
ppty-
Fe_2O_3 PdO catalyst ( sulfur free and chromium free ) for the medium temperature shift reaction of carbon monoxide was prepared by ppty . , Fe and Pb nitrates reacting with NH_4OH and their product hydroxides filtered , dried and calcined .
利用共沉淀法使铁和铅的硝酸盐在NH4OH作用下生成氢氧化物沉淀，经过过滤、干燥和煅烧得到了Fe2O3&PbO无硫无铬一氧化碳中温变换催化剂。