PROCESS FOR THE PRODUCTION OF BITUMEN OR BITUMEN-CONTAINING MIXTURES WITH IMPROVED PROPERTIES

摘要

The softening point of bitumens having softening points of up to 120 DEG C. is raised without adversely affecting rupturing point and other properties by heating the bitumen at a temperature above the softening point of up to 150 DEG C. for up to 30 minutes with either sulfuric acid or a metal halide selected from the group consisting of TiCl4, AlCl3, VOCl3, VCl4 and ZrCl4.