Abstract:
One exemplary embodiment can be a process for alkylating benzene. The process can include obtaining at least a portion of a stream from a transalkylation zone, combining the at least the portion of the stream from the transalkylation zone with a fuel gas stream, and providing at least a portion of the combined stream to a benzene methylation zone. Typically, the fuel gas stream includes an effective amount of one or more alkanes for alkylating at least partially from a hydrogen purification process tail gas.
Abstract:
A process for maximizing p-xylene production begins by producing a naphtha fraction and a light cycle oil fraction from a fluid catalytic cracking zone. The gasoline and light cycle oil fractions are combined and hydrotreated to produce a hydrotreated product. Fractionation of the hydrotreated product in a fractionation zone makes a light ends cut, a naphtha cut, a hydrocracker feed and an unconverted oil fraction. The hydrocracker feed is sent to a hydrocracking zone to make a hydrocracker product, which is then recycled back to the fractionation zone, feeding the hydrocracker product above an outlet for the hydrocracker feed, but below an outlet for the naphtha cut. The naphtha cut goes to a dehydrogenation zone where hydrogen is removed to make aromatics from naphthenes to make a dehydrogenated naphtha. The dehydrogenated naphtha is fed to an aromatics recovery unit to recover p-xylene and other aromatics.
Abstract:
One exemplary embodiment may be a process for producing one or more alkylated aromatics. Generally, the process includes providing a first stream including an effective amount of benzene for alkylating benzene from a fractionation zone, providing a second stream including an effective amount of ethene for alkylating benzene from a fluid catalytic cracking zone, providing at least a portion of the first and second streams to an alkylation zone; and passing at least a portion of an effluent including ethylbenzene from the alkylation zone downstream of a para-xylene separation zone.
Abstract:
A process is presented for quenching a process stream in a paraffin dehydrogenation process. The process comprises cooling a propane dehydrogenation stream during the hot residence time after the process stream leaves the catalytic bed reactor section. The process includes cooling and compressing the product stream, taking a portion of the product stream and passing the portion of the product stream to the mix with the process stream as it leaves the catalytic bed reactor section.
Abstract:
An apparatus and process are disclosed for recovering product from catalytically converted product streams. Gaseous unstabilized naphtha from an overhead receiver from a main fractionation column is compressed in a compressor. Liquid unstabilized naphtha from the overhead receiver and liquid naphtha fraction from the compressor are sent to a naphtha splitter column upstream of a primary absorber. Consequently, less naphtha is circulated in the gas recovery system.
Abstract:
A method and apparatus for converting glycerol into propylene glycol by directing a basic glycerol containing feed and a hydrogen containing gas into a reaction zone including a fixed bed of catalyst that is operating at glycerol conversion conditions where the reactor includes and at least one quench zone and directing a quench material into the quench zone.
Abstract:
A method and apparatus for converting glycerol into propylene glycol by directing a basic glycerol containing feed and a hydrogen containing gas into a reaction zone including a fixed bed of catalyst that is operating at glycerol conversion conditions where the reactor includes and at least one quench zone and directing a quench material into the quench zone.
Abstract:
A process (10) is provided for improving the cold flow properties of a hydrocarbon stream (14) employing a substantially liquid-phase continuous hydroisomerization zone (12) where the reaction zone has a substantially constant level of dissolved hydrogen throughout without the addition of additional hydrogen external to the reaction zone.
Abstract:
A catalytic hydrocracking process wherein a liquid phase stream comprising a hydrocarbonaceous feedstock (1), a liquid phase effluent from a hydrocracking zone (16), and hydrogen in a sufficiently low hydrogen concentration to maintain a liquid phase continuous system is fed into a hydrotreating zone (4) to produce a first hydrocarbonaceous stream comprising hydrocarbons having a reduced level of sulfur and nitrogen. The resulting hydrocarbons having a reduced level of sulfur and nitrogen are introduced into a hydrocracking zone (13) with a sufficiently low hydrogen concentration to maintain a liquid phase continuous system to produce a hydrocracking zone effluent (16) which provides lower boiling range hydrocarbons.
Abstract:
A hydrocarbon dehydrogenation process includes providing the hydrocarbon feed to a reactor. The hydrocarbon feed includes at least one hydrocarbon selected from light paraffins, heavy paraffins, or combinations thereof. The process further includes introducing an inert diluent into the feed stream, contacting the feed stream and the inert diluent with a catalyst in the reactor, and flowing an effluent stream out of the reactor.