DIRECT HYDROTHERMAL SYNTHESIS OF B-SSZ-31 FROM SILICA AND SODIUM-BORATE USING 1,3,3,6,6-PENTAMETHYL-6-AZONIABICYCLO[3.2.1]OCTANE HYDROXIDE AS STRUCTURE-DIRECTING AGENT

The direct synthesis of a borosilicate version of SSZ-31 was investiga ted starting from fumed silica and sodium berate as the silicon and bo ron source, respectively. As-synthesized boron Beta as a seed material was required for synthesizing fully crystalline material. The synthes is vessel has been observed to play a major role during the synthesis. Synthesis inside quartz tubes succeeded whereas that inside a teflon- lined stainless steel autoclave failed. Crystalline material was obtai ned inside the autoclave in presence of hollow quartz tubes. Part of t he tetrahedral boron could be substituted by aluminum refluxing the as -calcined sample with aluminum nitrate solution.