A process for hydrogenating aromatic polymers

摘要

A novel silica for use as a metal catalyst support has a surface area of at least 10 m<2>/g and a narrow pore size distribution such that at least 98 percent of the pore volume as measured by mercury porosimetry is defined by pores having diameter of greater than 60 nm and pore volume measured by nitrogen desorption for pores less than 60 nm is less than 2 percent of the total pore volume measured by mercury porosimetry. The silica can be prepared by combining potassium silicate in water with a gelation agent, polymerizing and leaching, and hydrothermally calcining the resultant silica.