Metal halide solid acids and supported metal halides as catalysts for the preparation of hydrocarbon resins
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United States of America Patent
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Aug 19, 2003
Grant Date -
Dec 5, 2002
app pub date -
Jan 7, 1998
filing date -
Jan 8, 1997
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Abstract
Supported metal halides and metal halide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer, C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated water may be removed from the solid acid catalyst prior to use. Resins with softening points (Ring and Ball) in the range of about 5.degree. C. to 170.degree. C. can be prepared. These catalysts offer advantages over the traditional Friedel-Crafts polymerization catalysts since the acid sites are an integral part of the solid. The solid acid catalysts are relatively nonhazardous, reusable catalysts which eliminate or at least reduce contamination of the resulting resin products with acid residues or by-products.
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