Abstract: An upgraded benzene-synthetic natural gas product is produced from hydrocarbon gas condensate feedstock by catalytically reforming a C.sub.6 -300.degree. F. B.P. fraction and hydrogasifying the remainder of the feedstock. The overall efficiency of the process is enhanced by dealkylation of certain intermediate streams in the process and by recycling certain other aromatic and hydrogen-rich streams within the process.

Abstract: Conventional noble metal reforming to upgrade the octane number of petroleum naphtha is an endothermic reaction which is carried out in a series of reactors with intermediate furnace heating of the petroleum fraction being upgraded. This specification discloses a process and apparatus configuration to increase the octane number of the reformate at a minimum liquid yield loss by cooling the first reforming stage effluent and then contacting the cooled effluent with a ZSM-5 type zeolite catalyst prior to the first intermediate furnace heating.

Abstract: Coronene deposits are removed from a heat exchange zone disposed in two parallel trains of heat exchangers in a reforming process by reducing the flow of reforming zone effluent in one of the trains of heat exchangers sufficiently to effect condensation of a portion of the reforming zone effluent in said one train of heat exchangers where the coronene is deposited while simultaneously increasing the flow of reforming zone effluent in the second train of heat exchangers. Control means are provided in each of the heat exchange trains.

Abstract: A process is disclosed for producing high octane hydrocarbons from a feed comprising paraffins having 5 to 9 carbon atoms which involves contacting the feed with steam and hydrogen in the presence of a steam active dehydrogenation catalyst wherein the amounts of steam and hydrogen employed relative to the feed are such that one obtains unexpectedly high conversion and unexpectedly high selectivity to high octane product.

Abstract: Coronene deposits are removed from a heat exchange zone of a reforming process by operating the reforming zone at conditions such that at least a portion of the reformer effluent condenses in the heat exchange zone where the coronene deposit occurs.

Abstract: Alkylaromatic hydrocarbons are steam-dealkylated in the presence of a catalyst comprising an alumina carrier and 0.1 to 2% b.w. of a group VIII noble metal, 0.05 to 2% of a group I.sub.B metal and 0.01 to 5% of an alkali metal.

Abstract: Process for steam dealkylation of alkylaromatic hydrocarbons, particularly useful to produce benzene from toluene and to de-alkylate the alkylaromatic hydrocarbons contained in the effluents from catalytic reforming and aromatic production units, wherein the catalyst contains, in addition to an alumina carrier (a) at least one metal selected from ruthenium, rhodium, palladium, osmium, iridium and platinum (b) rhenium and (c) an alkali metal selected from lithium, sodium, potassium, rubidium and cesium.

Abstract: A straight-run naphtha is fractionated at about 66.degree. C., which is just below the boiling point of methylcyclopentane. The 66.degree. C.+ fraction is reformed, and at least a portion of the reformate combined with the 66.degree. C.- fraction and reacted under aromatization conditions over a ZSM-5-type catalyst to form a C.sub.5 + product rich in aromatics. The C.sub.5 + aromaticized product and the remaining reformate can be either sent for BTX recovery or used as a high-octane component of a gasoline blending pool.

Abstract: A method for preparing a novel polymer which comprises polymerizing a polymerizable material selected from the group consisting of(a) substituted or unsubstituted dicyclopentadiene;(b) a cationically polymerizable unsaturated hydrocarbon-containing fraction obtained by distilling a cracking or reforming product of a petroleum and having a boiling point in the range of -20.degree. C. to 280.degree. C.;(c) a cationically polymerizable vinyl aromatic hydrocarbon having 8 to 10 carbon atoms;(d) a mixture of two or three of ingredients (a), (b) and (c); and(e) a mixture of any one of ingredients (a) to (d)with a cationically polymerizable unsaturated aliphatic hydrocarbon having 4 to 10 carbon atoms in the presence of a cationic polymerization catalyst; wherein a high-boiling product having a boiling point of at least about 150.degree. C. and an oxygen content of at least 0.

Abstract: Normal paraffinic hydrocarbons, having from three to about twenty carbon atoms per molecule, are dehydrogenated to produce corresponding linear mono-olefins.These are separated from unreacted paraffins, preferably via an adsorption-separation technique. Raffinate, containing the unreacted normal paraffins, is subjected to mild hydrotreating, as is the hydrogen-rich vaporous phase recovered from the dehydrogenation zone product effluent,to saturate the olefins therein. Hydrotreated effluent is introduced, generally in admixture with fresh feed paraffins, into the dehydrogenation reaction zone.This technique avoids by-product dehydrogenation reactions otherwise resulting in non-linear mono-olefins, di-olefinic hydrocarbons and aromatics.

Abstract: Hydrocarbon conversion is effected by hydrocracking a charge stock at mild cracking conditions followed by alkyl transfer typically transalkylation or disproportionation or isomerization under conditions conducive to extended catalyst life.

Abstract: A process for converting a naphtha feedstock to a pure benzene including the steps of: reforming the naphtha; removing a major fraction of C.sub.4 - C.sub.5 and heavy reformate components to obtain a reformate containing a major portion of C.sub.6 - C.sub.8 aromatic hydrocarbons and an associated saturated portion; extracting the aromatic hydrocarbons from the reformate countercurrently in a simplified process with a selective hydrophilic solvent, such as sulfolane, having high solubility for aromatic hydrocarbons and low solubility for paraffinic hydrocarbons to obtain an extract stream rich in C.sub.6 - C.sub.8 aromatic hydrocarbons and a raffinate stream rich in paraffinic hydrocarbons; and recovering the selective solvent from the extract stream to obtain an aromatic component comprising a major C.sub.6 - C.sub.8 aromatic hydrocarbons and about 3 to 18 wt. % paraffinic hydrocarbon impurity.

Abstract: A method for catalytically cracking an isolated reactant feed, 80-100 volume percent of which is a substantially mono-aromatic hydrocarbon fraction boiling in the boiling range of heavy gasoline and the remainder of which is a vaporizable hydrocarbon fraction, under effective cracking conditions of cracking temperature, catalyst composition, catalyst activity, catalyst-to-feed weight ratio, and weight hourly space velocity, to produce an isolated product having increased low molecular weight olefin and low molecular weight mono-aromatic contents and a reduced sulfur content and having a high octane rating.

Abstract: A process is disclosed for upgrading a naphtha which has been subjected to a reforming process which involves contacting said reformed naphtha together with added hydrogen with a crystalline aluminosilicate zeolite having a pore size of about 4.5 to 6 Angstrom units and a silica to alumina ratio of at least 3, said aluminosilicate having hydrogenation/dehydrogenation activity. Another embodiment of the invention resides in mixing a reforming catalyst with said crystalline aluminosilicate zeolite.

Abstract: Previously hydroformed feedstocks are upgraded to improve their octane rating by contacting said feedstocks in the presence of hydrogen with a sulfactivated catalyst comprising a metallic hydrogenation component, such as a platinum group metal, in combination with a crystalline aluminosilicate zeolite having uniform pore openings of about 5 Angstrom units. In its more specific aspects, the catalyst further contains a Group II-B metal such as zinc.

Abstract: Alkyl aromatic hydrocarbons useful as chemical raw material, solvents and the like are provided in high purity by hydrocracking of a fraction rich in alkyl aromatics and lean in aliphatic hydrocarbons over a particular zeolite catalyst associated with a hydrogenation/dehydrogenation component. The charge stock is characterized by substantial absence of hydrocarbons lighter than benzene. The technique is particularly well suited to production of maximum xylenes from a fraction containing higher boiling and lower boiling alkyl aromatics.