Alkylphosphonic acid- and small amine-templated synthesis of hierarchical silicoaluminophosphate molecular sieves with high isomerization selectivity to di-branched paraffins

► The P atoms in alkylphosphonic acid are introduced into the SAPO-11 framework. ► The long alkyl groups bonded with these P atoms induce intracrystal mesopores. ► The hierarchical SAPO-11-based catalyst has superior di-branched isomer selectivity.