摘要:
Disclosed is a method for removing unsaturated aliphatic compounds from a hydrocarbon feed stream by contacting the hydrocarbon feed stream with an acidic molecular sieve to produce a hydrocarbon effluent stream having a lower unsaturated aliphatic content relative to the hydrocarbon feed stream. The hydrocarbon feed stream comprises an aromatic compound, a nitrogen compound, and an unsaturated aliphatic compound.
摘要:
Disclosed is a method for removing unsaturated aliphatic compounds from a hydrocarbon feed stream by contacting the hydrocarbon feed stream with an adsorbent comprising clay to produce a hydrocarbon effluent stream having a lower unsaturated aliphatic content relative to the hydrocarbon feed stream. The hydrocarbon feed stream comprises an aromatic compound, a nitrogen compound, and an unsaturated aliphatic compound.
摘要:
A sprayable wash-and-wax composition which includes biodegradable surfactants and water repelling sealants. The sprayable composition preferably is packaged in an aerosol can and is dispensed as a foamed composition onto the car surface to be clean. The foamed composition is thereafter wiped from the car surface to produce a cleaned surface which is then buffed to a high gloss.
摘要:
Disclosed is a process for removing nitrogen from a hydrocarbon feed stream by contacting the hydrocarbon feed stream with an adsorbent at nitrogen removal conditions to produce a hydrocarbon effluent stream having a lower nitrogen content relative to the hydrocarbon feed stream. The hydrocarbon feed stream comprises an aromatic compound, an organic nitrogen compound, and a diolefin compound.
摘要:
An improved process and system for the endothermic dehydrogenation of an alkane stream is described. The process and system of the present invention comprise a back-mixed fluidized bed reactor. The alkane stream is dehydrogenated in a single reactor stage by contacting the alkane stream with a back-mixed fluidized bed of catalyst. Deactivated catalyst is withdrawn from the back-mixed fluidized reactor and heated to produce hot regenerated catalyst. The hot regenerated catalyst is returned to the back-mixed fluidized bed reactor at a rate sufficient to maintain the back-mixed fluidized bed reactor at substantially isothermal conditions.
摘要:
One exemplary embodiment can be a separation zone for separating a plurality of naphtha components. The separation zone can include first and second columns. The first column may include a dividing imperforate wall with one surface facing a feed and another surface facing a side stream. Typically, the wall extends a significant portion of the column height to divide the portion into at least two substantially vertical, parallel contacting sections. Also, the second column can communicate with the first column so as to provide a feed to or receive a feed from the first column. Generally, the second column is non-divided. The separation zone may provide at least four product streams.
摘要:
An apparatus for use in radial flow reactors is presented. The apparatus includes a plate of sufficient thickness to impart strength in supporting a solid particle bed, and is milled to have narrow slots allowing the flow of fluid through the plate, while preventing the passage of catalyst through the plate.
摘要:
A three-phase liquid polishing and cleaning composition of the invention is suitable for polishing and cleaning a painted exterior surface, and includes an organic phase, an aqueous phase, and a particulate phase. The organic phase comprises a petroleum-based liquid and the aqueous phase comprises water. The particulate phase comprises at least one particulate polishing grade abrasive having a mean particle size of not more than about 2.5 microns, which is selected from the group consisting of an abrasive that is harder than the painted surface to be polished and cleaned, and an abrasive that is softer than the painted surface to be polished and cleaned. The composition comprises at least one surfactant (e.g., an anionic surfactant, an emulsifying agent, and a foaming agent) to emulsify the organic and aqueous phases upon mixing (e.g., shaking) the composition, and to suspend the particulate phase in the emulsified organic and aqueous phases.
摘要:
Processing schemes and arrangements are provided for obtaining propylene and propane via the catalytic cracking of a heavy hydrocarbon feedstock and converting the propylene into cumene without separating the propane from the propane/propylene feed stream. The disclosed processing schemes and arrangements advantageously eliminate any separation of propylene from propane produced by a FCC process prior to using the combined propane/propane stream as a feed for a cumene alkylation process. A bottoms stream from the cumene column of the cumene alkylation process can be used and an absorption solvent in the FCC process thereby eliminating the need for a transalkylation reactor and a DIPB/TIPB column.
摘要:
This ethylbenzene process involves contacting, in an alkylation zone, a first benzene recycle stream and an ethylene feed stream with an alkylation catalyst to form ethylbenzene. In a transalkylation zone, a polyethylbenzene recycle stream and a second benzene recycle stream are contacted with a transalkylation catalyst to form additional ethylbenzene. The effluents are passed into a dividing wall distillation column. An ethylbenzene stream is removed from an intermediate point of the dividing wall fractionation column; a first benzene recycle stream is removed from a first end and a flux oil stream is removed from a second end. A second benzene recycle stream is removed from an intermediate point located between the first end and the ethylbenzene stream. A polyethylbenzene stream is removed from an intermediate point of located between the second end and the ethylbenzene stream.