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用水热法合成 MAPO-34分子筛。当水和结构导向剂特定时,在 Mg-P-Al 三组份相图上给出的生成 MAPO-34的纯相区域是 Al_2O_3≤MgO=0.5-3.0,P_2O_5/Al_2O_3=0.5-2.0和 P_2O_5/MgO=0.5-3.0,考察了反应混合物 pH 值对结晶相的影响,当 pH=5.0-7.5时,产物为纯 MAPO-34。测定出的 MAPO-34的成核活化能和结晶活化能分剐是37.11千焦/摩尔和60.46千焦/摩尔。当 MgO 被 ZnO 和 Co_2O_3和 TiO_2代替时,台成出 ZAPO-34、CoAPO-34和 TiAPO-34。在合成MAPO-34的反应混合物中加入 SiO_2,合成出了 MAPSO-34。HMAPO-34作为甲醇转化为低碳烯烃的催化剂,产物中 C_2=/C_3=比可达3.14,几乎没有 C_4组份。
MAPO-34 Molecular Sieve Synthesized by Hydrothermal Method. When water and structure-directing agent are specific, the pure phase regions of MAPO-34 generated on the Mg-P-Al three component phase diagram are Al 2 O 3 ≤MgO = 0.5-3.0, P 2 O 5 / Al 2 O 3 = 0.5-2.0 and P 2 O 5 /MgO=0.5-3.0, investigated the impact of the pH value of the reaction mixture on the crystalline phase, when the pH = 5.0-7.5, the product was pure MAPO-34. The measured activation energies and crystallization activation energies of MAPO-34 were 37.11 kJ / mol and 60.46 kJ / mol. When MgO was replaced by ZnO and Co_2O_3 and TiO_2, ZAPO-34, CoAPO-34 and TiAPO-34 were formed. In the synthesis of MAPO-34 reaction mixture was added SiO2, synthesized MAPSO-34. As a catalyst for the conversion of methanol to light olefins, HMAPO-34 has a C 2 = / C 3 ratio of up to 3.14 and almost no C 4 component.