Patent ID: 6103102
Filing Date: 2000-08-15
Classification: C10G

Abstract:
Method for improving the yield of lighter components in heat-refining process of petroleum heavy oil, comprising said heat-treatment in a heating unit being effected in the presence of at least one compound (I) having at least one mercapto alkylthio group:(R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 -(S-C.sub.m H.sub.2m --SH).sub.n (A)in which""m"" is an integer of 2 to 4,""n"" is an integer of 1 to 6; andeach of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 is an organic group and optionally bonded to each other through at least one chemical bond, and at least one of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 must exist in said compound, the total carbon number of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 being 1 to 28.