Abstract: A process and a device for the catalytic dehydrogenation of a C.sub.2+ paraffinic hydrocarbon charge is applicable to the synthesis of methyl tert-butyl ether. Effluent coming from the dehydrogenation reactor and containing olefins and water is cooled in at least one heat exchanger (41), saturated with water in a column (3) and sent to a stripping column (10) where it is at least partly put in contact with a recycled aqueous liquid phase containing a solvent, preferably methanol. The compressed gaseous effluent in which the water is thereby inhibited from freezing by the methanol is cooled in a heat exchanger (13) then separated in separator (8) into olefins and into hydrogen. An aqueous liquid phase with methanol is decanted at (8) and recycled in column (10).

Abstract: A process is disclosed for the catalytic dehydrogenation of C.sub.3 -C.sub.4 hydrocarbons wherein an integrated scheme comprising a cold box unit and a pressure swing adsorption unit is employed to reject methane produced in the dehydrogenation reaction from the hydrogen-rich recycle stream. The process results in a significant improvement in the efficiency of the separation of the reaction by-products and a corresponding increase in the overall feed capacity of the process.

Abstract: An integrated three-column process for recovering hydrocarbon distillate products from a hydroprocessing or hydrocracking reactor effluent stream and a hydrocarbon distillate product recovery train are disclosed. According to the present recovery process, an effluent stream from the cracking reactor is cooled and separated into light and heavy phase streams. The heavy phase stream is depressurized and stripped of light end components in a steam stripping column. The light phase stream is further cooled to separate a liquid stream which is combined with the light ends from the stripper and fed to a debutanizer. A C.sub.4 -rich light end stream taken overhead from the debutanizer is condensed to produce LPG product stream(s). A C.sub.4 -lean heavy end stream removed from the bottoms of the debutanizer is combined with a heavy end bottoms stream from the stripper and fed to a fractionator for fractionation into product distillate streams such as light and heavy naphtha, jet fuel, diesel oil, and the like.

Abstract: Process for the dehydrogenation of a charge incorporating saturated aliphatic hydrocarbons essentially having 3 to 5 carbon atoms per molecule, in which the charge, previously heated to the reaction temperature and without premixing with the hydrogen, is introduced at the inlet of at least one reactor, where the dehydrogenation reaction is performed in the presence of a catalyst, preferably incorporating a support having at least one oxide of an element chosen from among the groups IIA, IIB, IIIA, IIIB, IVA and IVB of the periodic classification of elements, at least one noble metal from the platinum family, at least one promotor metal and at least one alkali metal or alkaline earth metal.

Abstract: Purified hydrogen is recovered from the effluent of a catalytic dehydrogenation zone using an integrated cold absorption process. The effluent, which contains olefinic hydrocarbons and hydrogen is compressed, cooled and contacted with a liquid absorbent. The purified hydrogen can be recycled to the dehydrogenation zone and the olefinic hydrocarbons are recovered as product. The present invention will recover higher purity hydrogen and liquefiable hydrocarbons more economically than prior art processes.

Abstract: Catalytically cracked naphthas containing C.sub.9 + hydrocarbons are hydrocracked over a crystalline zeolite, typically, mildly steamed zeolite beta then subjected to reforming to achieve a gasoline product of reduced end boiling range and higher octane than the feed. A hydrogen stream from the reformer which contains a catalytic promoter, such as chlorine, is separated into a first stream and a second stream. The first stream is treated over a solid sorbent to remove the promoter and recycled promoter to the hydrocracking step while the untreated second hydrogen stream which contains promoter is recycled to the reformer.

Abstract: An improved process for the catalytic dehydrogenation of paraffinic hydrocarbons is disclosed. Feed paraffinic hydrocarbons are dehydrogenated by means of contacting the dehydrogenatable hydrocarbon with a dehydrogenation catalyst in a first dehydrogenation zone wherein the endothermic dehydrogenation reaction reduces the temperature of the resulting hydrocarbon stream containing dehydrogenated hydrocarbon compounds. The resulting effluent from the first dehydrogenation zone is then contacted with a stream of gas comprising normally gaseous hydrocarbon compounds having a temperature greater than the hydrocarbon stream to increase the temperature of the hydrocarbon stream and then introducing the resulting heated stream into a second dehydrogenation zone to produce additional dehydrogenated hydrocarbon compounds.

Abstract: Method of separating a gaseous alkene from a gaseous alkane by a pressure swing adsorption process unit alone or in combination with the distillation column wherein the alkene is preferentially adsorbed onto a bed of 4A zeolite at a temperature of about 50.degree. to about 200.degree. C.

Abstract: A process for the separation and recovery of the product stream resulting from the dehydrogenation of dehydrogentable hydrocarbons which process utilizes an integrated system for the recovery of liquid olefin product by use of a compression system, a pressure swing adsorption unit and a chiller system to concentrate the olefin poroduct.

Abstract: An improved process for the production of linear olefinic hydrocarbons by paraffin dehydrogenation and adsorptive separation is disclosed. Aromatic by-products normally formed in paraffin dehydrogenation are selectively removed using at least one aromatics removal zone. Removal of these aromatic by-products significantly increases the purity of the olefinic hydrocarbon product and increases the capacity of the adsorptive separation zone. The improved process is believed to increase the life of the adsorbent in the adsorptive separation zone and the life of the catalyst in the dehydrogenation zone.

Abstract: An apparatus and system for the dehydrogenation of ethane to produce ethylene and hydrogen through the use of a catalytic ceramic membrane having selective permeability, thus permitting separation of hydrogen from the reaction zone which causes further dehydrogenation of ethane, the catalytic ceramic membrane being in a cylindrical form which has been treated to have a metallic catalyst of suitable metal, such as platinum, palladium or chromium, deposited on the surface adjacent to the reaction zone. The catalytic ceramic membrane tube is enclosed within an alloy tube of suitable composition to permit heating to the temperature range of 300.degree. to 650.degree. C. The annulus surrounding the ceramic membrane tube may be filled with a pelleted catalyst, thus causing the dehydrogenation reaction to take place within this annular zone, but which will be accelerated by the permeation of hydrogen out of the zone through the ceramic catalytic membrane.

Abstract: A process for the separation and recovery of the products stream resulting from the dehydrogenation of dehydrogenatable hydrocarbons which process utilizes an integrated system for the recovery of liquid olefin product by the use of a compression system, a pressure swing adsorption unit and a chiller system to concentrate the olefin product.

Abstract: A process for the removal of hydrogen from a mixture of hydrogen and one or more organic compounds, which comprises contacting the mixture with a molecular sieve containing a reducible metal cation, said molecular sieve being selectively permeable to hydrogen.

Abstract: A process for the dehydrogenation of a dehydrogenatable hydrocarbon feedstock having small quantities of higher boiling range hydrocarbons which comprises: (a) introducing the dehydrogenatable hydrocarbon feedstock into a fractionation zone having at least a portion of reflux to a fractionation column supplied by the dehydrogenatable hydrocarbon feedstock to provide a dehydrogenatable hydrocarbon stream having a reduced concentration of higher boiling range hydrocarbons and a stream comprising the higher boiling range hydrocarbons; (b) introducing the dehydrogenatable hydrocarbon stream having a reduced concentration of higher boiling range hydrocarbon recovered in step (a) into a dehydrogenation zone containing dehydrogenation catalyst and operated at dehydrogenation conditions to provide a hydrocarbon stream comprising dehydrogenated hydrocarbons and unconverted dehydrogenatable hydrocarbons; (c) separating the hydrocarbon stream comprising dehydrogenated hydrocarbons and unconverted dehydrogenatable hydroc

Abstract: A process for the dehydrogenation of a dehydrogenatable hydrocarbon feedstock having small quantities of higher boiling range hydrocarbons which comprises: (a) introducing the dehydrogenatable hydrocarbon feedstock into a fractionation zone having at least a portion of reflux to a fractionation column supplied by a hereinafter-described recycle stream to provide a dehydrogenatable hydrocarbon stream having a reduced concentration of higher boiling range hydrocarbons and a stream comprising the higher boiling range hydrocarbons; (b) introducing the dehydrogenatable hydrocarbon stream having a reduced concentration of higher boiling range hydrocarbon recovered in step (a) into a dehydrogenation zone containing dehydrogenation catalyst and operated at dehydrogenation conditions to provide a hydrocarbon stream comprising dehydrogenated hydrocarbons and unconverted dehydrogenatable hydrocarbons; (c) separating the hydrocarbon stream comprising dehydrogenated hydrocarbons and unconverted dehydrogenatable hydrocarbo

Abstract: A process is disclosed for the catalytic dehydrogenation of propane or butanes. The vapor phase reaction zone effluent stream is contacted with a heavy absorption liquid and then with a light absorption liquid. The light absorption liquid is composed of hydrocarbons recovered from the reaction zone effluent stream. This secondary contacting removes components of the heavy absorption liquid from the recycle gas, thus eliminating the deleterious effects of these compounds on the dehydrogenation catalyst. The heavy absorption liquid may be produced within the process by a catalytic olefin-consuming reaction zone.

Abstract: An ethane-rich stream is reduced in pressure below the inlet pressure to a pyrolysis furnace, vaporized in heat exchange relationship with a process stream, recompressed, and passed to the pyrolysis furnace.

Abstract: A process for dehydrogenating dehydrogenatable hydrocarbons is disclosed in which a heat providing stream is utilized to supply a portion of the endothermic heat requirement of the reaction zone feed thereby decreasing the temperature drop of the dehydrogenation zone material. As a result, the amount of deleterious side reactions such as thermal cracking is reduced, and an increase in conversion of the dehydrogenatable hydrocarbons is realized.

Abstract: Hydrocarbons are catalytically dehydrogenated in a reaction zone comprising at least two separate beds of dehydrogenation catalyst. The reactants are reheated and hydrogen is consumed through use of an intermediate bed of hydrogen selective oxidation catalyst. The amount of hydrogen consumed in the combustion step is increased by cooling the effluent of the first dehydrogenation catalyst bed by direct or indirect heat exchange.

Abstract: This invention relates to a process for producing a high purity butene-1 product from n-butane via a dehydrogenation process. In one embodiment of the process the n-butane is dehydrogenated over a chromia-alumina catalyst and any butadiene formed hydrogenated to monoolefins. The monoolefins are separated and the butene-1 separated from isobutylene by reacting the isobutylene with methanol to form methyl tertiary butyl ether. The methyl tertiary butyl ether is separated from the butene-1 leaving it as a high purity product. Alternatively, the dehydrogenated product from the reactor may be contacted with a solvent to extract butadiene followed by hydrogenation, separation of monoolefins and conversion to methyl tertiary butyl ether.

Abstract: A hydrocarbon conversion process is disclosed which may be used to produce high purity isobutylene and/or tertiary butyl alcohol and methyl tertiary butyl ether. A mixed C.sub.4 feed stream is divided into two portions with a first portion being passed through a hydration zone to produce the tertiary butyl alcohol. The remaining hydrocarbons withdrawn from the hydration zone and the second portion of the feed stream are changed to an etherification zone. The unconverted hydrocarbons exiting the etherification zone may be subjected to isomerization and/or dehydrogenation to produce additional isobutylene. The high purity isobutylene is obtained by dehydrating the tertiary butyl alcohol.

Abstract: A process for the catalytic dehydrogenation of C.sub.2 + normally gaseous paraffinic hydrocarbons to produce the corresponding monoolefinic hydrocarbons is disclosed. The energy-efficient process is particularly directed to the separation of recycle hydrogen from the olefinic hydrocarbon products and unreacted paraffinic hydrocarbons.

Abstract: A process for the catalytic dehydrogenation of low molecular weight paraffinic hydrocarbons is disclosed. The process is particularly directed to the separation of hydrogen from the olefinic hydrocarbon products and unreacted paraffinic hydrocarbons.

Abstract: A process for the catalytic reforming of a hydrocarbonaceous feedstock at reforming conditions including a pressure of from about 50 to about 250 psig. is disclosed. A portion of the hydrogen-rich vapor phase recovered from the reforming zone effluent at a relatively low pressure is compressed and recycled to the reforming zone without further purification. The balance of said hydrogen-rich vapor phase, or the net hydrogen, is compressed to a relatively high pressure and recontacted with at least a portion of the liquid hydrocarbon phase recovered from said low pressure separation to effect a further purification of said net hydrogen and to maximize the recovery of C.sub.3 -C.sub.6 + material in the liquid phase.

Abstract: A process for the catalytic reforming of a hydrocarbonaceous feedstock, preferably to produce high quality gasoline boiling range products, is disclosed. Relatively impure hydrogen is separated from the reforming zone effluent, compressed, and recontacted with at least a portion of the liquid reformate product to provide relatively pure hydrogen, a portion of which is recycled to the reforming zone. The balance is further compressed and recontacted with at least a portion of the liquid reformate product to provide an improved recovery of normally gaseous hydrocarbons as well as an improved recovery of purified hydrogen at a pressure suitable for use in the relatively high pressure hydrotreating of sulfur-containing feedstocks.

Abstract: A process is disclosed for the catalytic reforming of hydrocarbons in the presence of hydrogen, preferably to produce high quality gasoline boiling range products. An improved recovery of normally gaseous hydrocarbons from the net excess hydrogen is realized by chilling and contacting said hydrogen with a normally liquid hydrocarbon stream in a plural stage absorption zone at an elevated pressure.

Abstract: A process for the catalytic reforming of a hydrocarbonaceous feedstock, preferably to produce high quality gasoline boiling range products, is disclosed. Relatively impure hydrogen is separated from the reforming zone effluent, compressed, and recontacted with at least a portion of the liquid reformate product to provide relatively pure hydrogen, a portion of which is recycled to the reforming zone. The balance is further compressed and recontacted with at least a portion of the liquid reformate product in a plural stage absorption zone to provide an improved recovery of normally gaseous hydrocarbons as well as an improved recovery of purified hydrogen at a pressure suitable, for example, the relatively high pressure hydrotreating of sulfur-containing feedstocks.

Abstract: A process is disclosed for the catalytic reforming of hydrocarbons in the presence of hydrogen, preferably to produce high quality gasoline boiling range products. An improved recovery of normally gaseous hydrocarbons from the net excess hydrogen is realized by chilling and contacting said hydrogen with a normally liquid hydrocarbon stream in a plural stage absorption zone at an elevated pressure.