Abstract: The separation of the para-isomer of a dialkyl benzene from a mixture of the isomers thereof, especially p-xylene, by contacting the mixture at adsorption conditions with a type X or type Y zeolite adsorbent, ion exchanged with barium and potassium, and recovering the para-alkylbenzene from the adsorbent by contacting the adsorbent with fluorobenzene or a difluorobenzene at desorption conditions.

Abstract: A process is disclosed for separation of ortho chlorotoluene and ortho-dichlorobenzene from their meta and para isomers by use of a specific crystalline aluminophosphate adsorbent which selectively removes the above ortho aromatic isomers. The selectively adsorbed ortho aromatic isomers are removed from the adsorbent through a desorption step.

Abstract: The present invention relates to a process for removing arsine from a light olefin to containing hydrocarbon feedstock, said process comprising the steps of (a) passing said feedstock over an absorbent material comprising nickel deposited on a support material wherein nickel is present as both nickel oxide and metallic nickel; and (b) recovering a stream having a substantially reduced arsine content.

Abstract: This invention relates to a process for increasing the octane of a refinery gasoline pool by segregating components which are increased in value by isomerization from those which are diminished in octane value by isomerization. The preferred feed stream of this process comprises di-branched paraffins, mono-methyl-branched paraffins and normal paraffins from which mono-methyl-branched and normal paraffins are selectively captured by a shape-selective molecular sieve. The preferred separatory shape-selective molecular sieve has a pore size of 5.5.times.5.5 to 4.5.times.4.5A but excluding 4.5.times.4.5A. Mono-methyl-branched paraffins and normal paraffins are removed from the shape-selective molecular sieve and isomerized in an isomerization zone to form di-methyl branched paraffins. An isomerization zone effluent stream is produced comprising unisomerized normal paraffins, mono-methyl-branched paraffins and di-branched paraffins.

Abstract: Process for eliminating jointly arsenic and carbon oxysulfide from an unsaturated hydrocarbon cut, wherein said hydrocarbon cut is contacted with an absorbing mass containing a support and lead oxide, comprising contacting the hydrocarbon cut in the liquid phase.

Abstract: The chromatographic adsorption separation of indene from petrochemical or synthetic feed mixtures with an Na- or K-exchanged X- or Y-zeolite and toluene, benzene, fluorobenzene or other halogen- or alkyl-substituted monocyclic aromatic desorbents. Selectivity of the separation is dependent on water content, from 1-8% (wt.), of the adsorbent.

Abstract: This invention relates to a process for the production of an isomerate gasoline blending component where the octane value of the isomerate is increased relative to prior art processes utilizing single separatory sieves. After respective isomerization of feed streams comprising C.sub.6 or C.sub.6.sup.+ normal paraffins, a multiple separatory sieve is located to selectively adsorb unreacted normal paraffins and mono-methyl-branched paraffins from an isomerate product stream. The preferred first separatory sieve is exemplified by a calcium 5A sieve which can adsorb normal paraffins while allowing mono-methyl-branched paraffins and more higly branched paraffin to pass to a second separatory sieve. The second sieve comprises a shape-selective zeolite having a pore size intermediate 5.5.times.5.5 and 4.5.times.4.

Abstract: Titanium-aluminum-silicon-oxide molecular sieves are disclosed having use as molecular sieves and as catalyst compositions in hydrocarbon conversion and other processes. The molecular sieves have a unit empirical formula on an anhydrous basis ofmR: (Ti.sub.x Al.sub.y Si.sub.z)O.sub.2wherein "R" represents at least one organic+ emplating agent; "m" represents the moles of "R" present per mole of (Ti.sub.x Al.sub.y Si.sub.z)O.sub.2 ; and "x", "y" and "z" represent the mole fractions of titanium, aluminum and silicon, respectively, present as tetrahedral oxides. The molecular sieve is useful in separating molecular species having different degrees of polarity and/or kinetic diameters.

Abstract: The catalyzed oxidative coupling of a lower molecular weight alkane to move valuable, higher molecular weight hydrocarbons is disclosed.

Abstract: Particles, fibers, or filaments of ethylene/carboxylic acid copolymers or terpolymers, especially in highly porous or microporous form, are employed in removing contaminants from solution in aqueous and/or organic liquids, especially metal contaminants. The porous polymers, having a surface area/weight ratio of at least about 0.5 m.sup.2 /gm, are useful alone, but may also be used in conjunction with, or in tandem with, previously known ion exchange resins such as polyacrylic acid crosslinked with divinylbenzene.

Abstract: A process is disclosed for selectively sorbing trace amounts of oxygen from low molecular weight olefins and inert gases by contacting with high surface area particulate coal-derived activated carbon having high ash and moisture content.

Abstract: Hydrocarbon liquids an gas, particularly gas to be processed in LNG plants, are treated to remove mercury by contacting them with free bismuth or tin or a mixture of these on silica, alumina, or other type of non-reactive base. The sorbent is prepared by milling together the oxide of bismuth or tin and the silica or alumina base and subsequently reducing the oxide in a heated reducing atmosphere.

Abstract: The separation of para-xylene from a mixture of C.sub.8 aromatic isomers in a zeolite adsorption process is improved by use of water as the desorbent. Increased desorption efficiency is obtained by the addition to the water of small amounts of a C.sub.1 to C.sub.8 alcohol, an anionic surfactant, an alkali solution or a mixture thereofs. Separation of water from the para-xylene product and raffinate is accomplished by phase separation.

Abstract: A substituted benzene isomer mixture containing a meta-substituted benzene or 1,3,5-substituted benzene is contacted with an adsorbent of a faujasite type zeolite containing a Ag cation and/or a Cu cation, whereby the meta-substituted benzene or 1,3,5-substituted benzene is separated and recovered as a raffinate component.

Abstract: A high surface area substrate with controlled pore size and slot geometry is used in an adsorbing process. The material is made by depositing at least two materials in alternating layers. The film is then broken up and one of the materials is etched away to produce a slotted surface structure. These slots can add size and shape selectivity to separations and catalytic processes which because of the uniform and controllable dimensions (>5A) would be superior to that obtainable from zeolites and clays.

Abstract: Magnetizable adsorbent particles suitable for use in a magnetically stabilized fluidized bed and with a smaller particle size than conventionally formed composite adsorbents are prepared by introducing magnetizable particles such as magnetite or iron into a reaction mixture for forming a zeolite having adsorbent properties, such as zeolite Y. The zeolite is formed as a coating on the magnetizable particle.

Abstract: An improved process for oligomerizing olefins is provided in which olefin feed is contacted with phosphoric acid catalyst to form an olefin oligomerization product containing phosphorous-containing foulant precursors. The olefin oligomerization product is then contacted with a foulant adsorbent comprising at least one member selected from the group consisting of alumina, activated alumina and magnesium oxide in an amount and under conditions sufficient to effect removal of at least a portion of said foulant precursors. The treated olefin oligomerization product stream can then be passed to downstream recovery and process equipment with minimized fouling.

Abstract: The sorption process involves combining a simulated countercurrent flow system with a stationary magnetically stabilized fluidized bed to achieve continuous adsorption-desorption to separate components of a feedstream.

Abstract: Iso-butane is separated from normal butane in a pressure swing adsorption system of at least three adsorbent beds, each adapted to selectively adsorb normal butane from a mixture thereof with iso-butane. The adsorption front of normal butane formed in each adsorbent bed upon the passage of the feed gas mixture thereto is moved through the bed to an extent enhancing the utilization of the adsorptive capacity thereof. By combinations of depressurization and repressurization together with purge, desirable product purity levels are obtained, while the cost of adsorbent equipment and of operation are reduced to the extent possible consistent with the purity requirements of a given application.

Abstract: Titanium-containing molecular sieves are disclosed having use as molecular sieves and as catalyst compositions in hydrocarbon conversion and other processes the instant invention employs novel titanium-containing molecular sieves comprising titanium, aluminum, phosphorus and oxygen and are generally employable in separation and hydrocarbon conversion processes.

Abstract: A substituted benzene isomer mixture containing a meta-substituted benzene or 1,3,5-substituted benzene is contacted with an adsorbent of a faujasite type zeolite containing a Ag cation and/or a Cu cation, whereby the meta-substituted benzene or 1,3,5-substituted benzene is separated and recovered as a raffinate component.

Abstract: A process for removing a halogen component from a halogen-containing organic compound, which comprises contacting an organic compound in the liquid state which is produced by using a halogen containing catalyst selected from the group consisting of Friedel-Crafts catalysts and Ziegler catalysts and contains the halogen component derived from said catalyst, with a hydrotalcite compound represented by the formulaM.sub.1-x.sup.2+ M.sub.x.sup.3+ (OH).sub.2+x-ny A.sub.y.sup.n-.mH.sub.2 OwhereinM.sup.2+ represents a divalent metal ion selected from the group consisting of Mg.sup.2+, Zn.sup.2+, Ca.sup.2+, Ni.sup.2+, Co.sup.2+, Mn.sup.2+ and Cu.sup.2+,M.sup.3+ represents a trivalent metal ion selected from the group consisting of Al.sup.3+, Fe.sup.3+ and Cr.sup.3+,A.sup.n- represents an anion having a valence of n selected from the group consisting of HCO.sub.3.sup.-, OH.sup.- and CO.sub.3.sup.2-, andx, y and m are each a positive number and satisfy the following conditions 0.1<x<0.5, 0.1<y<0.4, 0.ltoreq.

Abstract: A process is disclosed for the recovery of hydrogen and C.sub.6 -plus product hydrocarbons from the effluent stream of a hydrocarbon conversion reaction zone. The effluent stream is partially condensed to remove the bulk of the heavy hydrocarbons, which are sent to a fractionation zone. The remaining vapor is compressed to a substantially higher pressure. The vapor then passes into an autorefrigeration zone in which it is cooled and partially condensed by indirect heat exchange against flashed fluids. The still pressurized uncondensed compounds are transferred to a pressure swing adsorption zone, which produces a high purity hydrogen product. The initial compression therefore is used in two different high pressure separation zones in series.

Abstract: A process for selective separation of a linear aliphatic compound in admixture with at least one non-linear hydrocarbon compound, said compounds having a critical dimension of less than 6.8 Angstrom Units for sorption, which comprises contacting the mixture with zeolite ZSM-11, said zeolite being characterized by a silica:alumina mole ratio of at least 12, to effect selective sorption of said linear aliphatic compound by said zeolite.

Abstract: A hydrocarbon feedstock containing at least one paraffin hydrocarbon and an odor-causing impurity is deodorized by contact with a deodorizing agent. The deodorizing agent is a mixture of nickel oxide and a rare earth metal oxide and the odor-causing impurity is from the group consisting of sulfides, mercaptans, olefins, and oxygenated olefins. The feedstock is contacted with the deodorizing agent at a temperature not exceeding 150.degree. C.

Abstract: Lubricant components of high viscosity index are selectively separated from hydrocarbon base stocks by a selective sorption process using an intermediate pore size zeolite such as ZSM-5 as the sorbent. The process is of particular utility with synthetic lubricant stocks produced by the oligomerization of light olefins. The sorbed components may be desorbed from the zeolite to recover a high VI lubricant.

Abstract: An invention is described in which a portion of one of the product streams from an adsorption system is used to wash a recycle gas stream in order to improve the quality of one of the products.

Abstract: An improved technique for sorption of certain members of a ZSM-5 type of zeolites is provided. The class of zeolites is characterized by a silica to alumina mole ratio greater than 12 and a Constraint Index within the approximate range of greater than about 2 to about 12. The process of this invention involves sorption and/or selective separation of bicyclic fused-ring aromatic compounds, having a critical dimension less than 6.8 Angstrom units.

Abstract: A process for the separation of normal C.sub.4 hydrocarbons from isobutylene. A mixture of the normal C.sub.4 hydrocarbons and isobutylene is contacted with a molecular sieve comprising silicalite which is selective for the normal C.sub.4 hydrocarbons. The isobutylene is then recovered in the raffinate stream and the normal C.sub.4 hydrocarbons recovered by displacement with pentene-1.

Abstract: An improved adsorptive separation process by the selective sorption properties of certain members of a novel class of zeolites is provided. The zeolites are characterized by a silica to alumina mole ratio greater than 12 and a Constraint Index within the approximate range of greater than 2 to about 12. The process of this invention involves selective separation of aromatic compounds selected from the group consisting of mono-substituted and para-disubstituted benzene ring compounds and mono-substituted pyridine ring compounds in admixture with aromatic compounds selected from the group consisting of ortho-disubstituted, meta-disubstituted and more highly substituted benzene ring compounds and poly-substituted pyridine ring compounds by contacting the mixture with said zeolite to effect the selective sorption of said aromatic compounds selected from the group consisting of mono-substituted and para-disubstituted benzene ring compounds and mono-substituted pyridine ring compounds by said zeolite.

Abstract: An improved hydrocarbon separation process by the selective sorption properties of certain members of a novel class of zeolites is provided. The novel class of zeolites is characterized by a silica to alumina mole ratio greater than 12 and a Constraint Index within the approximate range of greater than about 2 to about 12. The process of this invention involves selective separation of higher molecular weight hydrocarbon compounds in admixture with lower molecular weight hydrocarbon compounds within a homolgous series by contacting the respective mixture with a zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio of at least about 12 and a Constraint Index with the approximate range of greater than 2 to about 12, to effect the selective sorption of said higher molecular weight hydrocarbon compounds by said zeolite.

Abstract: A process for reducing the level of cyclopentadiene present in a hydrocarbon stream containing isoprene and cyclopentadiene which involves contacting the stream with a base wherein said base is selected from the group consisting of potassium hydroxide, sodium hydroxide and potassium fluoride. The base is situated on activated carbon carrier.

Abstract: A process for the separation of a trans-olefin from a cis-olefin. A mixture of the trans- and cis-olefins is contacted with an adsorbent comprising silicalite which is selective for the trans-olefin. The process is particularly suitable for the separation of trans-2-butene from cis-2-butene.

Abstract: An improved hydrocarbon separation process by the selective sorption properties of certain members of a novel class of zeolites is provided. The novel class of zeolites is characterized by a silica to alumina mole ratio greater than 12 and a Constraint Index within the approximate range of greater than about 2 to about 12. The process of this invention involves selective separation of non-aromatic compounds in admixture with aromatic compounds by contacting the mixture with zeolite ZSM-5, ZSM-11, ZSM-23 or ZSM-35, said zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio of at least about 12, to effect the selective sorption of said non-aromatic compounds by said zeolite.

Abstract: A process for reducing the level of cyclopentadiene present in a hydrocarbon stream containing isoprene and cyclopentadiene which involves contacting the stream with a base wherein said base is selected from the group consisting of potassium hydroxide, sodium hydroxide and potassium fluoride. The base is situated on activated carbon carrier.

Abstract: A process for reducing the level of cyclopentadiene present in a hydrocarbon stream containing isoprene and cyclopentadiene which involves contacting the stream with an alkali metal hydroxide wherein the reaction product is an insoluble salt of CPD.

Abstract: An adsorptive separation process for separating ethanol from a feed mixture comprising ethanol and water, which process comprises contacting the feed mixture with an adsorbent comprising activated carbon, selectively adsorbing substantially all of the ethanol to be separated to the substantial exclusion of the water and thereafter recovering high purity ethanol. A desorption step is used to desorb the adsorbed ethanol with the desorbent selected being capable of direct blending into motor fuel.

Abstract: In the liquid phase reaction of isobutene in the presence of resin cation exchange resins with itself in a C.sub.4 hydrocarbon stream to form dimers, the formation of higher polymers, oligomers, and co-dimer by-products is suppressed by the presence of 0.0001 to 1 mole per mole of isobutene of methyl tertiary butyl ether.

Abstract: A process for the separation of metaxylene from aromatic C.sub.8 hydrocarbons, particularly from ethylbenzene and paraxylene, wherein a first phase is provided in which the mixture of aromatic hydrocarbons is selectively adsorbed, in vapor phase, into a catalytic bed consisting of zeolite of the Y type, preliminarily exchanged with potassium, and in a second phase a desorption is effected with a suitable solvent. The process, carried out at a temperature of 150.degree. to 200.degree. C. and preferably at atmospherical pressure, permits the recovery of metaxylene, substantially pure and at a concentration much higher than that of the starting mixture.

Abstract: Hydrocarbon, suitable for use as propellant, is contacted with a solid effective to remove odor-forming impurity therefrom. Hydrocarbons include isobutene-containing stream also containing minor proportions of unsaturated hydrocarbon, e.g. ethylene, propylene, isobutylene, and 2-butenes. Solids include an acid montmorillonite clay, aluminum chloride, AlCl.sub.3 .multidot.HCl, AlCl.sub.3 .multidot.RCl, at least one metal of Groups I, II, and III of the periodic table, and supported H.sub.3 PO.sub.4.

Abstract: Iron oxide particles composed of a crystalline phase of Fe.sub.2 O.sub.3, Fe.sub.3 O.sub.4 and combinations thereof together with an amorphous Fe.sub.2 O.sub.3 moiety or portion and having a surface area of at least 3.5 m.sup.2 /g are useful for scavenging hydrogen sulfide from substantially anhydrous non-aqueous liquids, particularly substantially anhydrous hydrocarbon liquids, for example, kerosene.

Abstract: Improved hydrocarbon separation processes by the selective sorption properties of a novel class of zeolites are provided. The novel class of zeolites is characterized by a silica to alumina mole ratio greater than 12 and a constraint index within the approximate range of greater than about 2 to about 12. The separations encompassed by this invention include paraffins from aromatics, olefins from aromatics, olefins from paraffins, linear paraffins from branched paraffins, linear olefins from branched olefins, methyl branched hydrocarbons from more highly branched hydrocarbons, higher molecular weight components from lower molecular weight components within an homologous series, n-paraffins or methylparaffins from cycloparaffins, n-alkyl or methyl alkyl substituted aromatics from more highly branched isomers, mixed paraffins from aromatics (dewaxing), and non-aromatic methyl-branched hydrocarbons from aromatics.

Abstract: Unsaturated compounds are separated from liquid hydrocarbon mixtures by adsorbing the unsaturated compounds on a macroporous cation exchange resin and desorbing the unsaturated compounds with a mononuclear aromatic compound.

Abstract: A process for the reduction of the peroxide number and color of olefins comprises contacting the olefin with an adsorbent and separating the contacted olefin from the adsorbent. The process is effective for internal olefins, a class of olefins in which reduction of peroxide number by conventional means is ineffective. Examples of effective adsorbents which may be employed in the process includes charcoal, alumina, silica, diatomaceous earth and montmorillonite clays.

Abstract: A process for purifying isoprene produced by catalytic decomposition of dimethyldioxane from carbonyl compounds and cyclopentadiene which involves passing isoprene at a temperature of 40.degree. to 70.degree. C. through a bed of a solid product such as an anion exchange resin or alkali (the latter may be used with or without an inert carrier), followed by subjecting the isoprene to close fractionation performed with at least 50 theoretical plates and at a reflux ratio of at least 3. The process of the present invention enables practically complete purification of isoprene from carbonyl compounds and cyclopentadiene. The purified isoprene, when used as a monomer in the production of stereospecific isoprene rubber, results in high-quality products; and reduces by a factor of 2-3 the Ziegler catalyst consumption in the isoprene rubber synthesis.

Abstract: Process for increasing the concentration of normal cis olefins in a hydrocarbon composition with pre-treated molecular sieves which have been heated to a temperature of from 400.degree. to 500.degree. F. for a period of about 1 to 6 hours to reach the water-zeolite equilibrium at said temperature range in the presence of water.