Process for separating dimethylnaphthalene isomers with zeolite

Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By contact with solid sorbent

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585820, 585831, C07C 712

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051460408

ABSTRACT:
Zeolite L in very small crystalline form is prepared by a process in which an alkaline reaction mixture comprising water, a source of silicon (SiO.sub.2), a source of alkali metal (M) (KOH) and a source of aluminium (Al.sub.2 O.sub.3.3H.sub.2 O) or gallium is heated to a temperature of at least 80.degree. C. for a period of time long enough to form zeolite L, the composition of the reaction mixture having the following molar ratios (expressed as oxides):

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patent: 4554146 (1985-11-01), Vaughn
patent: 4605637 (1986-08-01), Chang et al.
patent: 4701315 (1987-10-01), Wortel
Wright et al., "Localizing Active Sites in Zeolitic Catalysts; Neutron Powder Profile Analysis and Computer Simulation of Deuteropyridine Bound to Gallozeolite-L", Nature vol. 318 (1985) pp. 611-614.
Neusan et al., "Structural Studies of Gallisilicate Zeolite", New Developments in Zeolite Science and Technology, Elsivier 1986 pp. 457-463.

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