| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a process for producing a paraffinic hydrocarbon usable as a fuel by hydrotreatment of a feed from renewable sources such as vegetable oils and animal-source oils and fats. <P>SOLUTION: The flow of the total feed is divided up into a certain number of different part flows equal to the number of catalytic zones in a reactor, and the different part flows are injected in the successive catalytic zones in increasing proportions to produce an effluent containing paraffinic hydrocarbons. The effluent is subjected to a separation process to enable separation into a gas fraction and a liquid fraction containing the paraffinic hydrocarbons. At least a part of the liquid fraction is recycled to a pretreatment process or at least one of the catalytic zones, and the weight ratio of the recycled flow and the partial flow injected in the first catalyst zone is ≥10. <P>COPYRIGHT: (C)2013,JPO&INPIT |
