Patent ID: 9139781
Filing Date: 2015-09-22
Classification: C10B,C10G

Abstract:
1. A delayed coking method comprising: (a) heating a petroleum resid feed derived from an Orinoco Tar Sand Belt heavy crude having an initial boiling point of at least 525° C., a gravity of 5 to 9° API, and a Conradson Carbon Residue of 20 to 40 percent, to a coking temperature up to 500° C. and at a pressure of 100 to 550 kPag coking drum pressure; (b) injecting an aqueous solution of a basic additive comprising a carbonate salt of an alkali metal or alkaline earth metal into the resid in an amount of 300 to 3000 ppmw metal in the additive relative to the resid; (c) coking the resid in a delayed coking drum from which coking vapor products are collected and a coke product is formed as a mass in the drum; (d) quenching the coke mass in the drum to produce a solid coke product of lower density and higher porosity than in the absence of the basic additive.