Abstract: The present invention relates to an oligomerization process implemented in a gas/liquid reactor comprising a headspace recycle loop. The process more particularly relates to the oligomerization of ethylene to linear alpha-olefins such as 1-butene, 1-hexene, 1-octene or a mixture of linear alpha-olefins.

Abstract: The present invention relates to an oligomerization process implemented in a sequence of at least two gas/liquid reactors, placed in series, comprising at least one gas headspace recycle loop. The process more particularly relates to the oligomerization of ethylene to linear alpha-olefins such as 1-butene, 1-hexene, 1-octene or a mixture of linear alpha-olefins.

Abstract: The present invention relates to a device, a column and a method for radial separation or reaction, wherein the adsorption chamber (9) has a charging height (H3) greater than the height of the distribution duct (6) and the height of the collecting duct (8), and the upper wall (2) of the adsorption chamber (9) comprises at least one inlet (16) for washing solvent.

Abstract: The present invention relates to the field of gas/liquid reactors making possible the oligomerization of ethylene to give linear olefins by homogeneous catalysis with a reaction chamber comprising transverse internals capable of slowing down the ascent of the gaseous ethylene in the said reactor.

Abstract: A process for producing cellulolytic and/or hemicellulolytic enzymes with a strain of microorganism belonging to the family of filamentous fungi. The process includes growing the fungi in an aqueous culture medium, in the presence of at least one carbon-based growth substrate, in a stirred and aerated bioreactor. It also includes the production of enzymes, starting with the aqueous culture medium in the presence of at least one inductive carbon-based substrate and also inducing the production of hydrophobins. Further, at least a portion of the hydrophobins produced in step (b) are reintroduced into the growth step (a).

Abstract: The present invention relates to a gas/liquid oligomerization reactor with successive zones of variable diameter. The invention also relates to a process for the oligomerization of ethylene using a gas/liquid oligomerization reactor with successive zones of variable diameter.

Abstract: The invention relates to a process for the oligomerization of ethylene, carried out at a pressure of between 0.1 and 10.0 MPa, at a temperature of between 30 and 200° C.

Abstract: The present invention relates to an oligomerization process implemented in a gas/liquid reactor comprising a headspace recycle loop. The process more particularly relates to the oligomerization of ethylene to linear alpha-olefins such as 1-butene, 1-hexene, 1-octene or a mixture of linear alpha-olefins.

Abstract: The invention concerns a method for purifying a hydroalcoholic feedstock, comprising: a) a step of counter-current liquid-liquid extraction, comprising an extraction section supplied at the top with said hydroalcoholic feedstock and at least one intermediate raffinate fraction from step b) and at the bottom with an extraction solvent, and producing at the top an extraction stream and at the bottom a raffinate, wherein the extraction section is operated at a mean temperature in the extractor of between 10 and 40° C.; b) a counter-current liquid-liquid back-extraction comprising a back-extraction section supplied at the top with an acidic aqueous solution, having a pH between 0.5 and 5.0, and at the bottom with the extraction stream from step a), and producing at the top an extract and at the bottom the intermediate raffinate, wherein the back-extraction section is operated at a mean temperature between 40 and 80° C.

Abstract: The invention relates to a device for the upflow of a single-phase fluid comprising at least two beds of solid particles and at least one bypass means for a portion of said fluid, and also to the use thereof.

Abstract: The present invention describes a fluid distribution and collection device of a simulated moving bed separation unit comprising N plates, themselves divided into meridian panels, which device makes it possible to maintain an approximately identical residence time for each portion of fluid.

Abstract: The present invention relates to an oligomerization process using a reaction device comprising a dispersion means. In particular, the process relates to the oligomerization of ethylene to give linear ?-olefins, such as 1-butene, 1-hexene or 1-octene, or a mixture of linear alpha-olefins.

Abstract: Liquid-liquid extraction and distillation of a liquid feedstock of at least ethanol, water, acetaldehyde and at least one hydrocarbon-based impurity with a boiling point of between 20° C. and 100° C. at atmospheric pressure, or which generates, with at least one of the compounds of the liquid feedstock and/or with the organic extraction solvent and/or with the aqueous back-washing solvent, an azeotrope and a partition coefficient of between 0.1 and 5 at any point in a back-washing (BW) column of the extraction section, by (a) a liquid-liquid extraction step a washing (W) column, a back-washing (BW) column and at least one injection (F2) of a cut withdrawn in step b), located in the top half of the back-washing column, (b) distillation of an aldehyde and ethanol separation producing at least one aldehyde-rich effluent, one ethanol-rich effluent and one water-rich effluent.

Abstract: The present invention relates to a method for producing enzymes by a strain belonging to a filamentous fungus, which comprises three steps: (a) a first step of growing biomass, in the presence of at least one carbon-based growth substrate in a stirred and aerated bioreactor (1) in batch phase, (b) a second step of diluting the culture medium obtained in the first step (a), (c) a third step of producing enzymes from the diluted culture medium obtained in the second step (b), in the presence of at least one inductive carbon-based substrate, in fed-batch phase.

Abstract: Fluid mixing and distribution device for a downflow catalytic reactor, the said device comprising a mixing zone comprising at least one fluid-mixing space of length L1? and a fluid-exchange space of length L2?, situated underneath and superposed with said mixing space, it being understood that the length L2? of the said exchange space is strictly greater than the length L1? of the said mixing space so as to create a roof at the level of the said exchange space, the said roof comprising at least one longitudinal opening suited to the passage of the following its from the said exchange space to the said distribution zone.

Abstract: Fluid mixing and distribution device for a downflow catalytic reactor, the said device comprising a mixing zone comprising at least one fluid-mixing space of length L1? and a fluid-exchange space of length L2?, situated underneath and superposed with said mixing space, it being understood that the length L2? of the said exchange space is strictly greater than the length L1? of the said mixing space so as to create a roof at the level of the said exchange space, the said roof comprising at least one longitudinal opening suited to the passage of the following its from the said exchange space to the said distribution zone.

Abstract: The present invention relates to a process for producing cellulolytic and/or hemicellulolytic enzymes with a strain of microorganism belonging to the family of filamentous fungi, said process comprising the following steps: (a) a first step of growing the fungi in an aqueous culture medium, in the presence of at least one carbon-based growth substrate, in a stirred and aerated bioreactor, (b) a second step of producing enzymes, starting with the aqueous culture medium obtained in the first step (a), in the presence of at least one inductive carbon-based substrate, also inducing the production of hydrophobins, and, in a step (d), at least a portion of the hydrophobins produced in step (b) are reintroduced into the growth step (a).

Abstract: The invention relates to a process for the oligomerization of ethylene, carried out at a pressure of between 0.1 and 10.0 MPa, at a temperature of between 30 and 200° C.

Abstract: The present invention relates to an oligomerization process using a reaction device comprising a dispersion means. In particular, the process relates to the oligomerization of ethylene to give linear ?-olefins, such as 1-butene, 1-hexene or 1-octene, or a mixture of linear alpha-olefins.

Abstract: Liquid-liquid extraction and distillation of a liquid feedstock of at least ethanol, water, acetaldehyde and at least one hydrocarbon-based impurity with a boiling point of between 20° C. and 100° C. at atmospheric pressure, or which generates, with at least one of the compounds of the liquid feedstock and/or with the organic extraction solvent and/or with the aqueous back-washing solvent, an azeotrope and a partition coefficient of between 0.1 and 5 at any point in a back-washing (BW) column of the extraction section, by (a) a liquid-liquid extraction step a washing (W) column, a back-washing (BW) column and at least one injection (F2) of a cut withdrawn in step b), located in the top half of the back-washing column, (b) a distillation of an aldehyde and ethanol separation producing at least one aldehyde-rich effluent, one ethanol-rich effluent and one water-rich effluent.