Drying supported catalyst

Flat silica surface with Polymer film growing on the Polymer film after drying supported catalyst silica surface in solution... 

Two or more soHd catalyst components can be mixed to produce a composite that functions as a supported catalyst. The ingredients may be mixed as wet or dry powders and pressed into tablets, roUed into spheres, or pelletized, and then activated. The promoted potassium ferrite catalysts used to dehydrogenate ethylbenzene in the manufacture of styrene or to dehydrogenate butanes in the manufacture of butenes are examples of catalysts manufactured by pelletization and calcination of physically mixed soHd components. In this case a potassium salt, iron oxide, and other ingredients are mixed, extmded, and calcined to produce the iron oxide-supported potassium ferrite catalyst. 

It is well known that microwave drying of many solid materials is a very efficient and widely used process even on an industrial scale [3] it is also an attractive means of drying of heterogeneous catalysts. Microwave drying of catalysts and supported sorbents has several advantages ... 

The impact of the new activation procedure on the WGS rate, using either Na2C03 or NaOH, on silica-supported complexes at 150 °C, is reported in Table 51 156,163 Coitions 1-1.4 g dried silica-supported catalyst with 1.6 wt% loading of Ru. 

Method B (catalysed by polymer-supported chiral fl-hydroxyamines) The aldehyde (1 mmol) is added to the polymer-supported catalyst (0.298 g) in n-C6Hu (2 ml) at 0°C and the mixture is stirred for 15 min. The dialkylzinc (1M in rt-C6H 4, 2.2 ml) is added and the mixture is stirred for 1-8 days at 0°C. The reaction is quenched with aqueous HCI (1M, 5 ml) and the mixture is filtered and extracted with CH2C12 (3x10 ml). The dried (Na2S04) extracts are evaporated to yield the chiral secondary alcohol. 

WUes and Watts [48,53] have reported the use of a rather successful heterogenic catalytic system to carry out these reactions. They have tested a borosilicate glass microreactor (dimensions 3.0 x 3.0 x 0.6 cm) consisting of two etched layers with two inlets, mixing channels, a larger etched region and the outlet. A solid-supported catalyst was dry-packed in this structure (Fig. 4). 

Dry impregnation catalyst support preparation [CATALYSTS - SUPPORTED] (Vol 5)... 

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