Synthesis and crystal structure of zeolite RUB-41 obtained as calcination product of a layered precursor:: a systematic approach to a new synthesis route

Zeolite RUB-41, framework type code RRO, having a new framework structure has been synthesized as a calcination product using a layered silicate, RUB-39, as precursor. The precursor was obtained from hydrothermal synthesis using dimethyldipropylammonium hydroxide as structure directing agent., RUB-41, 18SiO(2) per unit cell, crystallizes in the monoclinic space group P2/c with a = 7.345(1) Angstrom, b = 8.724(1) Angstrom, c = 17.125(1) Angstrom, and beta = 114.2(1)degrees. The material has a 2-dimensional channel system with intersecting 8- and 10-membered ring pores. The pore openings determined from structure analysis are 5.8 Angstrom x 4.1 Angstrom (8MR) and 5.9 Angstrom x 4.1 Angstrom (10MR). The surface area determined from nitrogen adsorption experiments is 510 m(2)/g and the pore space is accessible for linear molecules. The material shows high sorption interaction for C4 alkenes and excludes i-butane from the pore system.