| 摘要 |
<p>A process for producing coke from a combined feed. The combined feed is initially provided as a first portion (16) which comprises easily cokable components and a second portion (25) which is essentially free of easily cokable components. The first portion is heated (18,19) to a temperature lower than that normally employed by a coking heater in a delayed coking process. The second portion is heated (20,21) to a temperature at which a combination of the first and second portion provides combined feed at coking temperatures. The combined feed is then subjected to coking conditions (24). The first portion, in one embodiment, may be comprised of a fresh feed (10 sec ) and the second portion may be comprised of a coker recycle (46). In another alternative, a fresh feed (10 min ) and a coker recycle (38) are combined and fractionated to produce the first portion (30) and the second portion (32). The first portion may include components which boil above a temperature of about 900 DEG F, and the second portion may be essentially free of easily cokable components.</p> |
