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Chromium catalyst, Phillips supported

Therefore, in such heterogeneous polymerizations, almost all industrial catalysts are supported, for example on silica, whereas the typical Ziegler s titanium catalysts are by definition supported on magnesium chloride. These catalysts are adsorbed at the surface or incorporated into the crystal structure of the support. Other catalysts, such as Phillips chromium catalysts, can be coupled at the support surface by a chemical bond. [Pg.338]

There have been further developments of chromium catalysts that fall conceptually in the field of Phillips catalysts. One of them is the use of aluminium phosphate, AIPO4, as a support because of its close similarity to silica, being isoelectronic and isostructural [224]. [Pg.94]

Chromium-containing Phillips catalysts are prepared by adsorption of a chromium compound, mostly chromium trioxide, onto an amorphous silica support and a subsequent reduction by exposure to ethylene. The resulting catalysts are... [Pg.229]

Hogan and Banks (Phillips Petroleum chemists) produce high MW linear HOPE with a silica-supported chromium catalyst... [Pg.3]

Though Phillips catalysts are by far the most important supported chromium catalysts for polyethylene, there are other commercially important examples of such catalysts. These were developed primarily in the 1970s by the Union Carbide Corporation (6), now part of the Dow Chemical Company. UCC chromium catalysts for polyethylene will be discussed in section 5.4. [Pg.62]

Supported chromium catalysts were developed by Union Carbide Corporation in the 1970s using different chromium precursors than are used in standard Phillips catalysts (6,11). The most important of these are based on chromocene and bis(triphenylsilyl)chromate, depicted in Figure 5.5. These catalysts are used in the Unipol gas phase process for LLDPE and HOPE and are different from standard Phillips catalysts in several respects ... [Pg.67]

Phillips catalyst silica-supported chromium catalyst for HOPE developed by Phillips Petro. in the 1950s... [Pg.121]

A Review of the Phillips Supported Chromium Catalyst and Its Commercial Use for Ethylene Polymerization... [Pg.123]

Abstract The Phillips supported chromium catalyst is used to produce some... [Pg.123]

See other pages where Chromium catalyst, Phillips supported is mentioned: [Pg.383]    [Pg.374]    [Pg.280]    [Pg.772]    [Pg.24]    [Pg.265]    [Pg.285]    [Pg.108]    [Pg.20]    [Pg.61]    [Pg.125]    [Pg.127]    [Pg.129]    [Pg.131]    [Pg.133]    [Pg.135]    [Pg.137]    [Pg.139]    [Pg.141]    [Pg.143]    [Pg.145]    [Pg.147]    [Pg.149]    [Pg.151]    [Pg.153]    [Pg.155]    [Pg.157]    [Pg.159]    [Pg.161]    [Pg.165]    [Pg.167]    [Pg.169]    [Pg.171]    [Pg.173]    [Pg.175]    [Pg.177]    [Pg.179]    [Pg.181]    [Pg.183]    [Pg.185]   


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Catalyst chromium

Catalysts, supported chromium

Chromium catalyst, Phillips supported active sites

Chromium catalyst, Phillips supported modifiers

Chromium catalyst, Phillips supported reduction

Chromium supported

Phillips

Phillips catalyst

Phillips chromium catalysts

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