Manner null of choice jiisopuropiru converting the naphthyl compound which uses the form choice acidic crystalline molecular sieve

摘要

The selective isopropylation of a naphthyl compound to diisopropylnaphthalene enhanced in the 2,6-diisopropylnaphthalene isomer is obtained in the presence of an acidic crystalline molecular sieve catalyst having twelve membered oxygen rings. The catalyst pore aperture dimension range from 5.5Å to 7.0Å. The use of these shape selective catalysts results in a diisopropylnaphthalene stream which is enhanced in β isomers and enhanced in the desired 2,6-diisopropylnaphthalene isomer. A particularly preferred catalyst is synthetic Mordenite having a specific Si/Al ratio and NMR characteristics. Specific catalyst modifications are also described to improve selectivity to the desired 2,6-diisopropylnaphthalene isomer.