M. Richter et al., MOLECULAR-SIEVING OF N-BUTENES BY MICROPOROUS SILICOALUMINOPHOSPHATES, Journal of the Chemical Society, Chemical Communications, (21), 1993, pp. 1616-1617
Of all three n-butenes (but-1-ene, cis-but-2-ene and trans-but-2-ene)
only the trans-isomer can easily access the pore system of the molecul
ar sieve SAPO-17 resulting in appreciable adsorption and allowing a pr
omising adsorptive separation of stereoisomeric butenes at temperature
s of 330-395 K, where catalytic reactions do not occur.