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美国联合碳化物公司Flanigen研究中心1982年首次公布无硅骨架氧化物——AlPO_4系列分子筛。在已合成出的二十种磷酸铝晶体中有六种二维结构和与沸石相同骨架结构的AlPO_4—17(毛沸石)及AlPO_4-20(方钠石)、新型结构AlPO_4-5、-11、-14、-16、-18、-31等十四种三维结构。它们内径孔体积从0.04—0.35cm~3/克,孔径从0.3—0.8?。AlPO_4系列
United Flanker Research Center of United Carbide Co., Ltd announced for the first time in 1982 that there was no silicon framework oxide-AlPO 4 series molecular sieve. Among the 20 kinds of aluminum phosphate crystals that have been synthesized, there are six kinds of two-dimensional structures and AlPO 4-17 (erionite) and AlPO 4-20 (sodalite) with the same framework structure as the zeolite, the novel structures AlPO 4 -5, -11 , -14, -16, -18, -31 and other fourteen three-dimensional structure. Their inner diameter pore volume from 0.04-0.35cm ~ 3 / g, pore size from 0.3-0.8 ?. AlPO_4 series