摘要:
An apparatus for contacting a bed of particulate material with a cross flowing fluid, which maintains the bed of particulate material within a retention volume. The apparatus includes partitions for retaining particles, with apertures disposed within the partitions. The apertures are covered by louvers that extend above the edges of the apertures to prevent solid particles from spilling through inlet apertures.
摘要:
A process combination is disclosed to selectively upgrade hydrocarbons in a manner to essentially eliminate olefins in product from the combination. Preferably the hydrocarbons comprise naphtha which is reformed to upgrade its octane number and/or to produce aromatic intermediates, followed by hydrogenation of olefins in the reformate. Olefin saturation optimally is effected by catalytic reaction on an olefin-containing reformate taken at an intermediate point from the effluent side of the reforming-process feed-effluent heat exchanger. Saturation is performed in a defined temperature range which results in selective hydrogenation.
摘要:
A process for the removal of trace quantities of polynuclear aromatic compounds from the vapor effluent of a hydrocarbon dehydrogenation zone containing normally gaseous olefinic hydrocarbons, trace mononuclear aromatic compounds and trace polynuclear aromatic compounds by contacting the vapor effluent of a hydrocarbon dehydrogenation zone with a lean liquid absorption stream comprising at least one alkylated mononuclear aromatic compound to absorb at least a portion of the trace mononuclear aromatic compounds and the trace polynuclear aromatic compounds to produce a rich liquid absorption stream and a gaseous olefin-containing hydrocarbon stream having a reduced concentration of mononuclear aromatic compounds and polynuclear aromatic compounds. The rich liquid absorption stream is separated to produce a stream rich in mononuclear aromatic compounds, a stream rich in alkylated mononuclear aromatic compounds and a stream comprising polynuclear aromatic compounds. At least a portion of the stream rich in mononuclear aromatic compounds is alkylated with indigenous olefins to provide at least a portion of the lean liquid absorption stream.
摘要:
A process for the management of polynuclear aromatic compounds produced in a hydrocarbon dehydrogenation zone wherein the effluent from the hydrocarbon dehydrogenation zone containing dehydrogenated hydrocarbons, dehydrogenatable hydrocarbons and trace quantities of mononuclear and polynuclear aromatic hydrocarbons is admixed with a recycle stream containing mononuclear aromatic compounds and the resulting admixture is contacted with an adsorbent to reduce the concentration of mononuclear and polynuclear aromatic compounds and to produce a stream comprising dehydrogenated hydrocarbons and dehydrogenatable hydrocarbons. An off-line spent adsorbent containing mononuclear and polynuclear aromatic compounds is contacted with a hot hydrogen-rich gas to recover at least a portion of said mononuclear and polynuclear aromatic compounds to thereby regenerate the spent adsorbent.