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hy az hine dem sed ine SAPO-34 molecular sieve was successfully synthesized using diethylamine (DEA) as a template. The influence of template concentra-tion and silica concentration on the synthesis were investigated. Pure SAPO-34 could be obtained when n(DEA)/n(Al2O3)P 1.5 and (SAPO) molecular sieves were firstly reported by Union olefin (MTO) reaction [3–5], and many research works have been reported relating to the synthesis and crystalliza-the synthesis of molecular sieves, such as structure-direct-synthesis of SAPO-34, including tetraethylammonium hydroxide (TEAOH) [15,23,24], dipropylamine [24], iso-propylamine [24], piperidine [25], morpholine [6,8,23,26], triethylamine (TEA) [7,27], and diethylamine (DEA) [28,29], etc. Up to now, research on the synthesis of SAPO-34 using DEA as a template is relatively scarce