The invention discloses a method for synthesizing SAPO_20 molecular sieve. The method first dissolves SAPO_34 molecular sieve catalyst or the abandoned SAPO_34 molecular sieve catalyst in sodium hydroxide solution, then puts it in a high-pressure reactor, crystallizes for 1_3 days at 160 C, and then cools after crystallization and dries after washing, the SAPO_20 molecular sieve is obtained. The invention not only develops a new route for synthesis of SAPO_20 zeolite, but also provides a utilization way of SAPO_34 zeolite waste catalyst, which can be used as a new exploration mode for energy saving, consumption reduction and comprehensive utilization in the process of SAPO_34 zeolite catalyst. Especially, SAPO_20 zeolite was synthesized by this method. After crystallization, no calcination template was needed. The product was regular in shape and uniform in particle size. It can be used for separation and adsorption, especially for the preparation of high quality SAPO_20 zeolite membrane.
【技术实现步骤摘要】
一种合成SAPO-20分子筛的方法
本专利技术属于分子筛的制备领域，具体而言，是一种合成SAPO-20分子筛的新方法。
技术介绍
AlPO-20、SAPO-20和方钠石互为异质同晶，属于立方晶系，其空间群为Im3m。由于构成分子筛骨架元素离子半径及T-O键长的差别，AlPO4-20分子筛的晶胞常数值均大于方钠石,而略小于SAPO4-20的相应值。SAPO4-20分子筛的孔大小为0.3nm(6员环)，孔体积为0.40cm3/g。（Lok,B.M.,Messina,C.A.,Patton,R.L.etal.USP4440871(1984)；LokBM,MessinaCA,PattonRL,etal.Silicoaluminophosphatemolecularsieves:anothernewclassofmicroporouscrystallineinorganicsolids[J].JAmChemSoc,1984,106:6092-6093，徐文旸，窦涛，吴锋，AlPO-20及其杂原子分子筛的合成研究，太原工业大学学报，1989,20（3）：21-26）。SAPO...
【技术保护点】
1.一种合成SAPO‑20分子筛的方法，其特征在于：将SAPO‑34分子筛或废弃的SAPO‑34分子筛催化剂溶于无机碱溶液，混合均匀后，将其置于高压反应釜中，在160℃下晶化1‑3天，晶化完成后冷却、洗涤、干燥，即得SAPO‑20分子筛。
【技术特征摘要】
1.一种合成SAPO-20分子筛的方法，其特征在于：将SAPO-34分子筛或废弃的SAPO-34分子筛催化剂溶于无机碱溶液，混合均匀后，将其置于高压反应釜中，在160℃下晶化1-3天，晶化完成后冷却、洗涤、...
【专利技术属性】
技术研发人员：张海荣，张文山，宋殿华，刘红艳，沈腊珍，韩生华，张涛，刘一丁，崔越，蒋煜，郭永，
申请(专利权)人：山西大同大学，
类型：发明
国别省市：山西,14
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