Mj. Vanniekerk et al., METHANOL CONVERSION AND PROPENE OLIGOMERIZATION PRODUCTIVITY OF DEALUMINATED LARGE-PORT MORDENITES, Industrial & engineering chemistry research, 35(3), 1996, pp. 697-702
Four different types of large-port mordenite were studied. Three of th
ese catalyst samples were dealuminated by treatment with nitric acid,
and the fourth type was a series of commercially available dealuminate
d mordenites. The methanol conversion and propene oligomerization prod
uctivities and selectivities of these dealuminated mordenites were inv
estigated on a laboratory scale at typical industrial reaction tempera
tures and pressures. The optimum catalyst morphology and degree of dea
lumination needed for maximum productivity were found to be similar fo
r both methanol conversion and propene oligomerization. High catalytic
productivities were obtained with mordenite which had been hydrotherm
ally dealuminated or with small crystallites which had been synthesize
d or dealuminated in such a way as to minimize the amount of extra-fra
mework aluminum in the mordenite pores.