| http://www.w3.org/ns/prov#value | - There is no connection whatever with particle size distribution or supported catalysts.Document (7) discloses the preparation of a supported catalyst composition by reacting in a first step an organo-magnesium compound with an oxygen-containing compound such as an alcohol, or with carbon dioxide, or with oxygen to introduce a C-O-Mg bond into the organo- magnesium compound.
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