PRODUCTION OF SILICA-CARRIER CATALYST CONTAINING RHODIUM

摘要

PURPOSE:To effectively use resourcefully rare and expensive rhodium by depositing a rhodium component on a silica carrier having the specific surface, pore volume, pore distribution, and pore diameter in the specified range. CONSTITUTION:The silica carrier having 50-600m<2>/g specific surface by a gaseous N2 method and 0.2-1.5cc/g pore volume by a Hg press-in method is prepared. The pore diameter distribution has a clear peak at 200-500Angstrom pore diameter. When the pore diameter at the maximum peak is expressed as DmaxAngstrom , the carrier has a sharp pore distribution wherein the pore volume in the pore range shown by the equation is controlled to >=50% of the volume of pores having 10,000-30Angstrom diameter and the volume of pores having 0.75Dmax-30Angstrom diameter. A catalytic component contg. rhodium is deposited on the silica carrier to produce the catalyst.