Catalytic, hollow, refractory spheres, conversions with them

Details Catalytic, hollow, refractory spheres, conversions with them Catalytic, hollow, refractory spheres, conversions with them

1987-04-08

1989-02-14

Pal, Asok

Chemistry of hydrocarbon compounds

Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...

Hydrocarbon is aromatic

208300, 423352, 428403, 428404, 502523, 502527, 518715, 585273, 585277, 585482, 585531, 585670, B01J 2340

Patent

active

048047961

ABSTRACT:
Improved, heterogeneous, refractory catalysts are in the form of gas-impervious, hollow, thin-walled spheres (10) suitable formed of a shell (12) of refractory such as alumina having a cavity (14) containing a gas at a pressure greater than atmospheric pressure. The wall material may be itself catalytic or a catalytically active material coated onto the sphere as a layer (16), suitably platinum or iron, which may be further coated with a layer (18) of activator or promoter. The density of the spheres (30) can be uniformly controlled to a preselected value within .+-.10 percent of the density of the fluid reactant such that the spheres either remain suspended or slowly fall or rise through the liquid reactant.

REFERENCES:
patent: 4576926 (1986-03-01), Wang et al.
patent: 4701436 (1987-10-01), Wang et al.

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