Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By ring formation from nonring moiety – e.g. – aromatization,...
Patent
1992-06-24
1994-11-15
McFarlane, Anthony
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By ring formation from nonring moiety, e.g., aromatization,...
585407, 585417, 423326, 423333, 502 61, 502 70, C07C 276, C01B 3320, B01J 2904
Patent
active
053650026
ABSTRACT:
The invention relates to a crystalline zeolite-like gallosilicate having an atomic ratio of Si/Ga in the outer crystalline surface that is not larger than the average Si/Ga ratio for the whole of the crystal. The invention also relates to a method of making such a gallosilicate comprising the hydrothermal crystallization of a strictly inorganic reaction mixture having the following molar ratios: SiO.sub.2 /Ga.sub.2 O.sub.3 .gtoreq.5; OH.sup.- /SiO.sub.2 =0.05-1.0; and H.sub.2 O/SiO.sub.2 =10-1,000. The invention further relates to the above-described method wherein said reaction mixture is prepared by adding an aged gel to a first mixture, the first mixture preferably having a composition with the following molar ratios: SiO.sub.2 /Ga.sub.2 O.sub.3 .gtoreq.5; OH.sup.- /SiO.sub.2 =0.05 to 1.0; and H.sub.2 O/SiO.sub.2 =20 to 100.
REFERENCES:
patent: 4585641 (1986-04-01), Barri et al.
patent: 4606900 (1986-08-01), Kacirek et al.
patent: 4803060 (1989-02-01), Occelli
patent: 4968650 (1990-11-01), Chu et al.
patent: 5273737 (1993-12-01), Wallau et al.
Derwent Abstract for EP 443,539.
Derwent Abstract for EP 44,288.
Spichtinger Rudolf
Thome Roland
Tissler Arno
Unger Klaus K.
Wallau Martin
McFarlane Anthony
Vaw Aluminium AG
Veba Oel Ag
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