Abstract: Processes and apparatuses for producing para-xylenes are provided. The processes comprises providing a reformate stream comprising aromatic hydrocarbons to a reformate splitter to provide a reformate bottoms stream and a reformate overhead stream. A portion of the reformate bottoms stream is passed to a para-xylene separation unit for separating para-xylene, wherein the portion of the reformate bottoms stream is passed to the para-xyelene separation unit without an intermediate step for removal of olefins.

Abstract: An apparatus for actuating method for removing acidity and/or moisture from a hydrocarbon gas, by absorption into a sweetening liquid and into a dehydration liquid, that are adapted to extract acid compounds or water from the gas, respectively. The apparatus includes at least such a container and a gas convey selective convey means, for actuating the treatment modes, in particular responsive to a flowrate of the gas. The apparatus according to the invention allows to maintain the sweetening and/or dehydration efficiency, in particular in the case of a progressive reduction of the flowrate of natural gas that can be obtained from a well or gasfield.

Abstract: Mixtures of hydrocarbons predominantly having 4 carbon atoms per molecule known as C4 cuts are used in obtaining crude 1,3-butadiene by a thermal cracking process. Vaporous purified crude C4 cuts are produced from liquid crude C4 cuts, containing butanes, butenes, 1,3-butadiene, C3 hydrocarbons, C4 oligomers and polymers, and C5+ hydrocarbons via an extractive distillation by fist removing the C4 oligomers and polymers and the C5+ hydrocarbons and then vaporizing the liquid crude C4 cut in a vaporizer vessel. The vaporizer vessel is directly or indirectly in contact with a stripping column where liquid C4 cuts are supplied to the upper region, direct gas and liquid exchange with the vaporizer vessel occurs in the lower region, and vaporous purified crude C4 cuts are removed from the top region.

Abstract: The present invention relates to a method in which a catalytic reaction is used in order to produce hydrocarbons from renewable starting material derived from biological organisms such as vegetable lipids, animal lipids, and lipids extracted from macroalgae and microalgae, and more specifically relates to a method for selectively making a hydrocarbon, which is suitable for making gasoline or diesel, by removing the oxygen contained in the starting material without consuming hydrogen. In the present invention, the production takes place by bringing the starting material into contact with hydrotalcite, which constitutes a catalyst, thereby removing oxygen via a decarboxylation or decarbonylation reaction; and the starting material is one or more such material selected from triglycerides, fatty acids, and fatty acid derivatives obtained from a renewable source of supply originating from a biological organism.

Abstract: There is provided a closed loop purity and recovery control system and process for operating a xylene purification system such as a Parex unit.

Abstract: A process for cracking hydrocarbon feedstock comprising at least one sulfur-containing compound comprising: heating the feedstock and a peroxide-containing compound, mixing the heated feedstock and peroxide-containing compound with a fluid and/or a primary dilution steam stream to form a mixture, flashing the mixture to form a vapor phase and a liquid phase which collect as bottoms and removing the liquid phase, separating and cracking the vapor phase, and cooling the product effluent, wherein the oxidized sulfur-containing species are removed as bottoms

Abstract: Methods for separating di-olefins from mono-olefins, and olefins from non-olefins such as paraffins, oxygenates and aromatics; are provided. The methods use metal salts which complex both mono-olefins and di-olefins, but which selectively complex di-olefins in the presence of mono-olefins. The metal salts are dissolved or suspended in ionic liquids, which tend to have virtually no vapor pressure. Preferred salts are Group IB salts, more preferably silver and copper salts. A preferred silver salt is silver tetrafluoroborate. A preferred copper salt is silver CuOTf. Preferred ionic liquids are those which form stable solutions, suspensions or dispersions of the metal salts, which do not dissolve unwanted non-olefins, and which do not isomerize the mono- or di-olefins. The equivalents of the metal salt can be adjusted so that di-olefins are selectively adsorbed from mixtures of mono- and di-olefins. Alternatively, both mono- and di-olefins can be adsorbed, and the mono-olefins selectively desorbed.

Abstract: The invention relates to a process for the recovery as a feedstock of an alpha-olefin from a mixture containing mainly hydrocarbon compounds, such as is obtained by Fischer-Tropsch-synthesis after an at least crude separation of components boiling higher and/or lower than the alpha-olefin, wherein tertiary olefins of the mixture, after superstoichiometrical addition of a low alcohol, are subjected to catalytic etherification and a stream derived by etherification is fed jointly with the alpha-olefin and the ethers produced and other high boiling reaction products to a distillative separation of components boiling higher than the olefin.