过氧化氢和磷酸对以亚磷酸作磷源合成SAPO-41和AlPO-41的影响

Effects of H_2O_2 and H_3PO_4 on the Synthesis of SAPO-41 and AlPO-41 Molecular Sieves Using H_3PO_3 as the Phosphorus Source

考察了以亚磷酸作为磷源合成SAPO-41和AlPO-41时加入过氧化氢或磷酸对生成SAPO-41和AlPO-41的影响.结果表明,向反应体系中加入过氧化氢或者使用磷酸部分替代亚磷酸,都能明显缩短SAPO-41和AlPO-41的晶化时间.此外,使用混合磷源还能够降低模板剂的用量,获得小晶粒晶化产物.

Using H3PO3 as the phosphorus source is a new route to prepare SAPO-41 and A1PO-41 molecular sieves. However, it needs a long crystallization period for the formation of these AFO structure materials. In the present communication, effects of the addition of H2O2 and H3PO4 on the synthesis of SAPO-41 and A1PO-41 have been investigated. The addition of either H2O2 or H3PO4 can promote the crystallization of A1PO-41 and SAPO-41. Besides, SAPO-41 has been obtained with the crystal size smaller than 10μm at lower di-n-propy-lamine concentration when the mixture of H3PO3 and H3PO4 is used as the phosphorus source.