Abstract: A novel crystalline hybrid solid with a mixed organic-inorganic matrix is described which has a three-dimensional structure containing an inorganic framework with metallic centers based on zinc connected together via deprotonated organic ligands constituted by the entity —O2C—C6H2—(O)2—CO2. This novel solid is termed IM-21 and has an X-ray diffraction diagram as given below.

Abstract: The present invention concerns the elimination of heavy metals, in particular mercury and possibly arsenic and lead, present in a gaseous or liquid effluent by means of a capture mass comprising a support essentially based on alumina obtained by the gel method and at least one element selected from the group constituted by copper, molybdenum, tungsten, iron, nickel and cobalt. The invention is advantageously applicable to the treatment of gas of industrial origin, synthesis gas, natural gas, gas phase condensates and liquid hydrocarbon feeds.

Abstract: The present invention concerns the elimination of heavy metals, in particular mercury and possibly arsenic and lead, present in a gaseous or liquid effluent by means of a fixed bed process using an adsorbent in the form of monolithic or supported extrudates, said extrudates being characterized by a length h and a section comprising at least three lobes. The adsorbent is composed of at least one active phase based on sulphur in the elemental form or in the form of a metallic sulphide. The invention is advantageously applicable to the treatment of gas of industrial origin, synthesis gas, natural gas, gas phase condensates and liquid hydrocarbon feeds.

Abstract: The invention concerns a capture mass for capturing heavy metals in a liquid or gaseous effluent, comprising a porous solid support, copper sulphide and at least one second metal sulphide the metal of which is selected from the group constituted by chromium, manganese, iron, cobalt and nickel, and in which the ratio of the percentage by weight of the metal or metals other than copper to the percentage by weight of copper is in the range 0.01 to 2. The invention also concerns a process for preparing said capture mass and a process for capturing heavy metals in a gaseous or liquid effluent, in which said effluent is brought into contact with said capture mass.

Abstract: The present invention concerns the elimination of heavy metals, in particular mercury and possibly arsenic and lead, present in a dry or moist gaseous effluent (1) by means of a capture mass (2) comprising a porous support at least part of which is of low mesoporosity and an active phase based on sulphur. The invention is advantageously applicable to the treatment of gas of industrial origin, synthesis gas or natural gas.

Abstract: A novel crystalline hybrid solid with a mixed organic-inorganic matrix is described which has a three-dimensional structure containing an inorganic framework with metallic centres based on zinc connected together via deprotonated organic ligands constituted by the entity —O2C—C6H2—(O)2—CO2. This novel solid is termed IM-21 and has an X-ray diffraction diagram as given below.

Abstract: A method of monitoring breakthrough of an adsorbent bed consisting for example of ion-exchange resins, used during a stage of purification of an ester stream containing glycerin, obtained for example in a vegetable or animal oil and aliphatic monoalcohol transesterification process, permits the instantaneous detection of the presence of glycerol (glycerin) in the ester stream by arranging a turbidimeter at the adsorbent bed outlet.

Abstract: The invention relates to a process for preparation of a cationic zeolite that is at least partially exchanged with one or more monovalent and/or multivalent cations. The process comprises at least the stages for separate activation of a zeolite that is to be exchanged and an anhydrous salt under a dry, inert gaseous stream, dissolution of the anhydrous salt in an anhydrous organic solvent, ion exchange under dry inert atmosphere, filtering and washing with an anhydrous organic solvent, and calcination in the presence of oxygen and under a dry gaseous stream. The invention also relates to the use of prepared zeolites for the separation or the purification of hydrocarbon feedstocks.

Abstract: The invention relates to a process for neutralization of a cationic zeolite that is at least partially exchanged with one or more monovalent and/or multivalent cations. The neutralization process comprises at least the stages for dissolution of a basic salt in an anhydrous organic solvent, degassing this solution by bubbling a dry inert gas, suspending the zeolite in this solution under dry inert gas, filtering and washing the solid by an anhydrous organic solvent, and calcination in the presence of oxygen and under a dry gaseous stream. The invention also relates to the use of neutralized zeolites for the separation or the purification of hydrocarbon feedstocks.

Abstract: The invention concerns a process for separating meta-xylene from a hydrocarbon feed comprising isomers containing 8 carbon atoms, comprising: a step for bringing said feed into contact with a faujasite type zeolite adsorbant, the percentage of water in the adsorbant being in the range 0 to 8% by weight and the adsorption temperature being from 25° C. to 250° C.; a desorption step employing a solvent selected from tetraline and its alkylated derivatives; a step for separating meta-xylene from the desorbant.

Abstract: The invention concerns an improved hydrocracking process with a recycle having a step for eliminating polyaromatic compounds from at least a portion of the recycled fraction by adsorption on a particular adsorbent based on alumina-silica with a controlled macropore content.

Abstract: A method of monitoring breakthrough of an adsorbent bed consisting for example of ion-exchange resins, used during a stage of purification of an ester stream containing glycerin, obtained for example in a vegetable or animal oil and aliphatic monoalcohol transesterification process, permits the instantaneous detection of the presence of glycerol (glycerin) in the ester stream by arranging a turbidimeter at the adsorbent bed outlet.

Abstract: The invention concerns an improved hydrocracking process having a step for eliminating polyaromatic compounds from at least a portion of a recycled fraction by adsorption on a particular adsorbent based on alumina-silica with a limited macropore content.

Abstract: The invention concerns a process for separating meta-xylene from a hydrocarbon feed comprising isomers containing 8 carbon atoms, comprising: a step for bringing said feed into contact with a faujasite type zeolite adsorbant, the water content of the adsorbant being in the range 0 to 1% by weight and the adsorption temperature being from 160° C. to 180° C.; a desorption step employing a solvent selected from toluene, indane and mixtures thereof.

Abstract: The invention concerns a process for separating meta-xylene from a hydrocarbon feed comprising isomers containing 8 carbon atoms, comprising: a step for bringing said feed into contact with a faujasite type zeolite adsorbant, the percentage of water in the adsorbant being in the range 0 to 8% by weight and the adsorption temperature being from 25° C. to 250° C.; a desorption step employing a solvent selected from tetraline and its alkylated derivatives; a step for separating meta-xylene from the desorbant.

Abstract: The invention concerns a process for separating meta-xylene from a hydrocarbon feed comprising isomers containing 8 carbon atoms, comprising: a step for bringing said feed into contact with a faujasite type zeolite adsorbant, the water content of the adsorbant being in the range 0 to 1% by weight and the adsorption temperature being from 160° C. to 180° C.; a desorption step employing a solvent selected from toluene, indane and mixtures thereof.

Abstract: The invention concerns an improved hydrocracking process having a step for eliminating polyaromatic compounds from at least a portion of a recycled fraction by adsorption on a particular adsorbent based on alumina-silica with a limited macropore content.

Abstract: The invention concerns an improved hydrocracking process with a recycle having a step for eliminating polyaromatic compounds from at least a portion of the recycled fraction by adsorption on a particular adsorbent based on alumina-silica with a controlled macropore content.