A process and catalyst for the liquid phase selective hydrogenation of alkynes to alkenes with high selectivity to alkenes relative to alkanes, high alkyne conversion, and sustained catalytic activity comprising a reactant comprising an alkyne and a non-hydrocarbon solvent/absorbent, contacting the reactant stream with a hydrogen-containing stream in the presence of a supported, promoted, Group VIII catalyst, removing the solvent/absorbent, and recovering the alkene product.

Process for liquid phase hydrogenation

A composition and method for preparation of a catalyst for the liquid phase selective hydrogenation of alkynes to alkenes with high selectivity to alkenes relative to alkanes, high alkyne conversion, and sustained catalytic activity comprising a Group VIII metal and a Group IB, Group IIB, Group IIIA, and/or Group VIIB promoter on a particulate support.

Catalyst formulation for hydrogenation

An apparatus and method are provided for processing hydrocarbon feeds. The method enhances the conversion of hydrocarbon feeds into conversion products, such as ethylene and propylene. In particular, the present techniques utilize a high-severity reactor integrated with another reactor type to convert hydrocarbons to other petrochemical products.

Method and Apparatus for Converting Hydrocarbons Into Olefins

A method for the absorption of alkynes and diolefins from an ethylene or propylene containing stream with conversion to alkenes by catalytic hydrogenation in a solvent over a fixed bed comprising a supported catalyst.

Absorption and conversion of acetylenic compounds

The invention relates to a process for converting hydrocarbons into unsaturated products such as acetylene and/or ethylene. The invention also relates to converting acetylene to olefins such as ethylene and/or propylene, to polymerizing the olefins, and to equipment useful for these processes.

Hydrocarbon conversion process

A process for the high-yield recovery of ethylene and heavier hydrocarbons from the gas produced by pyrolysis of hydrocarbons in which the liquid products resulting from the fractionated condensation of a cracking gas for the recovery of almost all the ethylene, are supplied to a distillation column, called a de-ethanizer, at different intermediate levels. At the top of the de-ethanizer the vapor of the column distillate is treated directly in an acetylene hydrogenation reactor, the effluent containing virtually no acetylene being separated by a distillation column called a de-methanizer, into an ethylene- and ethane-enriched tail product, while the head product is recycled by compression or treated for subsequent recovery of ethylene.

Process and installation for recovery and purification of ethylene produced by pyrolysis of hydrocarbons, and gases obtained by this process

Procede pour la recuperation a grand rendement de l'ethylene et des hydrocarbures plus lourds a partir de gaz produit par pyrolyse des hydrocarbures (1) dans lequel les produits liquides (12-15, 23) resultant de la condensation fractionnee du gaz de craquage (1) pour la recuperation de presque tout l'ethylene, alimentent une colonne de distillation (C1), dite deethaniseur a differents niveaux intermediaires, au sommet de laquelle, la vapeur (31) du distillat de colonne est traitee directement dans un reacteur d'hydrogenation d'acetylene (R1), l'effluent ne contenant presque plus d'acetylene etant separe par une colonne de distillation (C2) dite demethaniseur, en un produit de queue (43) enrichi en ethylene et ethane tandis que le produit de tete (44) est recycle par compression ou traite pour une recuperation ulterieure de l'ethylene. Process for the recovery of high-yield ethylene and heavier hydrocarbons from the gas produced by pyrolysis of hydrocarbons (1) wherein the liquid (12-15, 23) resulting from the fractional condensation of the cracking gas ( 1) for the recovery of almost all ethylene, fed to a distillation column (C1), said deethanizer to various intermediate levels, the top of which the vapor (31) of the column distillate is treated directly in a reactor of hydrogenation of acetylene (R1), the effluent containing virtually no longer acetylene being separated by a distillation column (C2) said demethanizer in a bottoms product (43) enriched in ethylene and ethane while the overhead product (44) is recycled by compression or treated for further recovery of ethylene.

Process and installation for recovering and purifying of ethylen produced by hydrocarbon pyrolysis

The method involves the removal of acetylene by solvent extraction and selective hydrogenation. A final gaseous current enriched in hydrogen and methane and a liquid fraction enriched in ethylene and ethane are collected. A process for the fractionation of an anhydrous gas from hydrocarbons pyrolysis containing H2 and 1 - 3C hydrocarbons, including ethylene, propylene and acetylene into a current enriched in H2 and methane, a current enriched in ethylene and depleted in acetylene and a current enriched in propylene, involves: (a) cooling the pyrolysis gas and progressively liquefying it by passing through a succession of heat exchangers at decreasing temperatures; condensates are obtained one enriched in propylene and another enriched in ethylene and ethane with a proportion of H2, methane and acetylene in solution. A residual H2-rich gas is collected; (b) evaporating the condensates by lowering the pressure, and reheating to provide two fractions; (c) introducing the partially evaporated fractions from (b) into a distillation column (de-ethanizer), the ethylene/ethane -enriched fraction entering at a point higher than the propylene-rich fraction. A primary gaseous current is separated at the head and a primary liquid current, enriched in propylene, from the base, which is collected; (d) directing the primary gaseous current to a zone for elimination of acetylene by solvent extraction and selective hydrogenation by means of the H2 contained in the gaseous head current, giving an effluent free from acetylene; (e) cooling and fractionating the effluent in a demethanizer column giving a head fraction enriched in H2 and methane, which is collected, and a base fraction enriched in ethylene and ethane, which is also collected. An Independent claim is included for the installation to effect the process.

Recovery of ethylene and heavier hydrocarbons, from gas formed by pyrolysis of hydrocarbons, involves progressive condensation of gases and use of de-ethanizer and de-methanizer

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Process and installation for recovery and purification of ethylene produced by pyrolysis of hydrocarbons, and gases obtained by this process

Process and installation for recovering and purifying of ethylen produced by hydrocarbon pyrolysis

Recovery of ethylene and heavier hydrocarbons, from gas formed by pyrolysis of hydrocarbons, involves progressive condensation of gases and use of de-ethanizer and de-methanizer