A silica support for use in the manufacture of a silica supported heteropolyacid catalyst for use in producing a carboxylic ester from a monocarboxylic acid, olefin and water wherein the support is produced by treating silica-gel granules with steam at a temperature in the range 100 to 300.degree. C. for a period of time in the range 0.1 to 200 hours.

 
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< Supported catalyst containing active titanium in the homo, co-, and ter-polymerization of olefin-unsaturated compounds

> Polyethylene resins

~ 00468