(under subclass 400) Subject matter in which a feedstock is subjected to more that one hydrogenation treatment during the process.
(1) Note. The plurality of the steps may be characterized by a completely desparate nature of the steps, e.g., one step being a treatment with gaseous hydrogen, another being a hydrogen, another being a hydrogen donor treatment, or the difference in the steps may be a mere claimed change in hydrogenation condition, e.g., a change in temperature, pressure, concentration of reactants, etc.
(2) Note. Both hydrogenation must be applied to a material which is taken off as a product of the process, whether one or both hydrogenations are applied to only the product fraction, the entire feedstock or any product stream therebetween.
SEE OR SEARCH THIS CLASS, SUBCLASS:
416, for a process wherein a recycle stream is hydrogenated.
