Patent ID: 8449763

Claim:
A method of cracking residual oil, the method comprising: providing a nozzle reactor, the nozzle reactor comprising: a reactor body having a reactor body passage with an injection end and an ejection end; a first material injector having a first material injection passage and being mounted in the nozzle reactor in material injecting communication with the injection end of the reactor body, the first material injection passage having (a) an enlarged volume injection section, an enlarged volume ejection section, and a reduced volume mid-section intermediate the enlarged volume injection section and enlarged volume ejection section, (b) a material injection end, and (c) a material ejection end in injecting communication with the reactor body passage; and a second material feed port penetrating the reactor body and being (a) adjacent to the material ejection end of the first material injection passage and (b) transverse to a first material injection passage axis extending from the material injection end and material ejection end in the first material injection passage in the first material injector; injecting a stream of cracking material through the first material injector into the reactor body; injecting residual oil through the second material feed port into the reactor body and transverse to the stream of cracking material entering the reactor body from the first material injector to produce cracked residual oil and uncracked residual oil; and recycling the uncracked residual oil to a coker or hydrocracker located upstream of the nozzle reactor.