Titanium oxide supports hydrous

DOSCH ET AL. Hydrous Titanium Oxide-Supported Catalysts... 

The principal steps in the process proposed by the UKAEA for recovery of uranium from seawater are shown in Fig. 5.20. The titania recovery system consists of 60 beds, 1.3 ft (0.4 m) deep, each with a flow area of 188,000 ft (17,500 m ), filled with hydrous titanium oxide supported on an inert carrier. The inventory of the entire system is 71 million lb (32.2 million kg) of Ti, valued at 71 million in 1966. 

Fig. 8 Stabilization of hydrous titanium oxide surface by the addition of rare-earth oxide to the support. (From Ref.. ) (View this art in color at www.dekker.com.)...

Kennedy, J. F. and Kay, I. M., Hydrous titanium oxides-new supports for the simple immobilisation of enzymes. 

Anthony and Dosch [1, 2] prepared a series of new crystalline titanates (CT) by modifying the procedure used to prepare hydrous titanium oxide. CT with basal spacings of 1.0, 1.17, and 1.6 nm were prepared. The catalytic activities of Pd supported catalysts were varied depending on the type of CT. One labelled as type 2 titanate, when used as a precursor in the preparation of a supported Pd catalyst, had the highest activity for hydrogenation of pyrene and 1-hexene among these Pd supported CT. However, CT were not thermally stable as... 

A series of new crystalline titanates (CT) are shown to have considerable potential as catalysts supports. For Pd supported catalysts, the catalytic activity for pyrene hydrogenation was substaniatially different depending on the type of CT, and one was substantially more active than Pd on hydrous titanium oxide (HTO). For 1-hexene hydrogenation the activities of the new CTs were approximately the same as for the hydrous metal oxide siqtports. Stereochemical effects, such as shape selective catalysis, ars to be occurring when pyrene is hydrogenated. 

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