In a visbreaking operation, feed has to be heated from 350 C to 450 C to 480 C to achieve reduction in viscosity of heavy residues. This is achieved by a heater as shown in figure E-2. Feed enters at ...
Olefin content is generally small for straight-run products, but for stocks derived from secondary/thermal processes such as coking, visbreaking, or resid hydrocracking (H-OIL [*] etc.), it can ...