Abstract: Capturing at least one heavy metal, from mercury and arsenic, contained in a moist gas comprising water vapour, by the following steps: a) heating the moist gas by heat exchange with a compressed heat transfer fluid obtained in step e) in order to obtain a condensed heat transfer fluid and a gas reheated to a temperature Tc; b) bringing the reheated gas into contact with a heavy metal capture mass in order to obtain a gas depleted in heavy metal; c) decompressing the cooled heat transfer fluid; d) cooling the gas depleted in heavy metal by heat exchange with the heat transfer fluid produced in step c) in order to obtain a cooled gas at a temperature Tf, the heat transfer fluid being vaporized; e) compressing the vaporized heat transfer fluid in a manner such as to obtain a compressed heat transfer fluid, the compressed heat transfer fluid being recycled.

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 describes a liquid-liquid extraction column with perforated plates and downpipes, having a majority of so-called “open” plates and a minority of so-called “closed” plates, the two types of plates differing in the degree of perforation. Application of the said column to the treatment of liquid-liquid systems with time-variable coalescence.

Abstract: The method allows to incorporate an alcohol or a mixture of alcohols into fuels by minimizing the energy expenditure linked with the prior production of the alcohol or of the mixture of alcohols. One or more bases of the fuel, to which an oxygen-containing compound or a mixture of oxygen-containing compounds have possibly been added, are used to extract the alcohol or the alcohol mixture contained in aqueous solutions produced by biomass fermentation processes. After adjusting the temperature of the aqueous solution stream and of the stream containing one or more bases of the fuel through exchangers, these streams are fed into an extractor. The extract leaving the extractor is then dried and/or an oxygen-containing compound or a mixture of oxygen-containing compounds is added thereto. The raffinate leaving the extractor is sent to a water treating plant or recycled.

Abstract: Process for the production of paraxylene from a C8 aromatic feedstock that comprises the following stages: A stage for separation by adsorption in a simulated moving bed SMB that produces an extract that contains at least 95% paraxylene and at least one raffinate R that contains ethylbenzene, A recycling of raffinate to the SMB separation stage after isomerization, in which R is separated in membrane separation means to obtain a first fraction F1 that is relatively high in ethylbenzene, which is purged, and an additional fraction F2 that is relatively low in ethylbenzene, which is recycled to the SMB after a single isomerization, preferably in the liquid phase.

Abstract: A process for 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 process is advantageously applicable to the treatment of gas of industrial origin, synthesis gas, natural gas, gas phase condensates and liquid hydrocarbon feeds.

Abstract: This invention relates to the field of processes for membrane separation and applies in particular to the purification of C2 or C3 olefins. This process makes it possible more particularly to separate propylene from a mixture that contains other C3 hydrocarbons such as propane. The membranes that are used in the process according to this invention are vitreous polymer-based membranes whose pattern contains a bis-phenyl-9,9-fluorene group.

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 invention relates to a process for purification of olefinic feedstocks using an adsorbent comprising a 12 MR-type zeolite, in which the zeolite content of said adsorbent is between 93% by weight and 100% by weight, and the binder content of said adsorbent is between 0 and 7% by weight, in which said zeolite contains silicon and an element T that is selected from the group that consists of aluminum, boron, gallium and iron, and in which the Si/T atomic ratio is less than 20.

Abstract: Process of extracting sulphur-containing compounds from a hydrocarbon cut of the gasoline or LPG type by liquid-liquid extraction with a soda solution employing a unit (2) for pretreatment of the feedstock to be treated located upstream of the unit (4) for extraction with soda, said pretreatment unit consisting of a first pretreatment reactor operating in batch mode followed by a second continuous reactor of the piston type operating in piston mode.

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: Process of extracting sulphur-containing compounds from a hydrocarbon cut of the gasoline or LPG type by liquid-liquid extraction with a soda solution employing a unit (2) for pretreatment of the feedstock to be treated placed upstream of the extraction unit (4), the soda being introduced into the extraction column (4) in the form of two circuits operating either in parallel, or in series.

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 describes a liquid-liquid extraction column with perforated plates and downpipes, having a majority of so-called “open” plates and a minority of so-called “closed” plates, the two types of plates differing in the degree of perforation. Application of the said column to the treatment of liquid-liquid systems with time-variable coalescence.

Abstract: The invention concerns a process for desulphurizing a feed comprising oxygen-containing compounds, hydrocarbon-containing compounds and organic sulphur-containing compounds, by capturing sulphur on a capture mass comprising iron oxides or zinc oxides and more than 20% by weight of zinc ferrite. The process is operated in the presence of hydrogen at a temperature in the range 200° C. to 400° C.

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: The invention relates to a process for membrane separation that makes it possible to separate linear hydrocarbons from branched hydrocarbons. The membrane that is used comprises a dense selective layer that consists of a polymer whose chemical structure contains at least one bis-phenyl-9,9-fluorene group.

Abstract: Process for separating propane and propylene using a distillation column and at least one membrane separation unit constituted by one or more modules operating in series, said membrane separation unit being placed either upstream, or downstream, or upstream and downstream of the distillation column.

Abstract: The present invention describes a method of producing fatty acid alkyl esters and glycerin implementing a set of transesterification reactions between a vegetable or animal oil and an aliphatic monoalcohol in the presence of a heterogeneous solid catalyst so as to obtain an effluent comprising at least alkyl esters, free glycerol, bonded glycerol and alcohol, wherein at least one stage of separation of at least a portion of the effluent is carried out in order to separate the ester produced and the bonded glycerol, said separation occurring through a membrane.

Abstract: The liquid hydrocarbon stream including COS is introduced via line 1 into membrane contactor CM to be placed in contact, through membrane M, with the aqueous alkanolamine solution arriving via line 3. The COS contained in the hydrocarbon stream is absorbed by the aqueous alkanolamine solution. The liquid hydrocarbons from which the COS has been removed are evacuated from CM via line 2. The aqueous solution containing COS is sent via line 4 to zone R to be regenerated. The compounds released during regeneration, particularly COS and COS-derived products, are evacuated from zone R via line 5. The regenerated aqueous alkanolamine solution is recycled via line 3 into membrane contactor CM.