Synthesis of thermally stable SBT and SBS/SBT intergrowth zeolites

Stabilizing large pores Zeolites with very cages, such as zeolite Y, are rare but extremely useful in processing the hydrocarbons petroleum. Lee et al. report a route for preparing thermally stable forms of large-cage phosphate-based molecular sieves UCSB-6 and UCSB-10 (see Perspective by Xie). They used mainly sodium cesium ions inorganic structure-directing agents, along an organic molecule, their charge-density mismatch approach. These zeolites were diesel-cracking catalysts at 600°C. Science , abi7208, this issue p. 104 ; see also abj1834, 28