Ifp Energies Nouvelles

Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Rejane Dastillung

Vincent Coupard

Marc Jacquin

Beatrice Fischer

Sophie Couderc

Raphael Huyghe

Caroline Aymard

Nuno Pacheco

Matthieu Rolland

Olivier Thinon

Marcel Ropars

Jean-Christophe Gabelle

Kirill Drobyshev

Sandra Menir

Frederic Augier

Damien Leinekugel Le Cocq

Wilfried Weiss

Margarita Dorato

Remy Marchal

Nicolas Cadran

Isabelle Guibard

Benjamin Clement

Mickael Mejean

Pierre Balz

Claire Fauvarque Nuytien

The present invention relates to a process for producing butadiene from ethanol, in two reaction steps, comprising a step a) of converting ethanol into acetaldehyde and a step b) of conversion into butadiene, said step b) simultaneously implementing a reaction step and a regeneration step in (n+n/2) fixed-bed reactors, n being equal to 4 or a multiple thereof, comprising a catalyst, said regeneration step comprising four successive regeneration phases, said step b) also implementing three regeneration loops.

Method for producing butadiene from ethanol with optimised in situ regeneration of the catalyst of the second reaction step

The invention relates to a process for treating an hydroalcoholic feedstock comprising ethanol and butanol in order to produce an ethanol-rich effluent, a water-rich effluent and a butanol-rich effluent, comprising a) a water-ethanol separation step comprising a distillation column fed with said hydroalcoholic feedstock and comprising at least 14 theoretical plates, a molar reflux ratio of less than or equal to 1.2, a side withdrawal in the butanol accumulation zone and two injections of recycled streams resulting from steps b) and c); b) a demixing step comprising a section for mixing the stream withdrawn in step a) and the fraction withdrawn in step c), and a decanting section, the heavy phase being recycled to the distillation column of step a); c) a butanol separation step comprising a distillation column fed with the light phase resulting from step b), comprising a side withdrawal of a water/butanol/ethanol fraction recycled to the mixing section of step b) and producing a butanol-rich effluent and an ethanol-water distillate which is recycled to the distillation column of step a). This process appears to be particularly advantageous for the treatment of the hydroalcoholic effluent from the Lebedev process.

Method for partially extracting butanol from an aqueous solution comprising ethanol and butanol

The present invention relates to a process for producing butadiene from ethanol, in two reaction steps, comprising a step a) of converting ethanol into acetaldehyde and a step b) of conversion into butadiene, said step b) simultaneously implementing a reaction step and a regeneration step in (n+n/2) fixed-bed reactors, n being equal to 2 or a multiple thereof, comprising a catalyst, said regeneration step comprising four successive regeneration phases, said step b) also implementing a regeneration loop for the inert gas and at least one regeneration loop for the gas streams comprising oxygen.

Process for producing butadiene from ethanol with in situ regeneration of the catalyst of the second reaction step

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&#xb0; C. and 100&#xb0; 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 (F) 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.

Method for selectively separating impurities present in a hydro-alcoholic cut by recycling through a liquid-liquid extraction column

The invention relates to a method for producing butadiene that is fed with a butanediol feedstock, with said method comprising at least:

Method for producing and purifying 1,3-butadiene

The invention relates to a process for producing butadiene from an ethanol feedstock comprising a step of converting ethanol into butadiene, a step of separating the reactants into a hydrated butadiene effluent, an impurities effluent and an ethanol-butadiene effluent, a separation step that separates the ethanol-butadiene effluent into a butadiene distillate and a contaminated reactants effluent, a step of purifying the butadiene by extractive distillation and an effluent treatment step.

Process for producing butadiene from ethanol integrated with extractive distillation

The invention relates to a method for producing 1,3-butanediene from a butanediol feedstock that includes:

Method for producing butadiene from butanediols

The invention relates to a process for producing butadiene from an ethanol feedstock, comprising a step of converting the ethanol into butadiene, a distillation step, a step of washing with water, a butadiene purification step comprising at least one section for separating the 1-butene by extractive distillation and a final distillation section fed with the topped butadiene distillate, separating at the top a purified butadiene effluent and at the bottom a butene residue, and an effluent treatment step.

Process for producing butadiene from ethanol, comprising purification of a butadiene-loaded effluent by extractive distillation

A process for the production of butadiene from an ethanol feed having at least 80% by weight of ethanol, A) converting ethanol into acetaldehyde B) converting an ethanol/acetaldehyde mixture into butadiene, C1) hydrogen treatment, D1) butadiene extraction, a first butadiene purification D2), a subsequent butadiene purification D3), an effluent treatment E1), E2) eliminating impurities and brown oils and F) scrubbing with water.

Method for the production of butadiene and hydrogen from ethanol in two low-water and low-energy-consumption reaction steps

The invention concerns a process for the production of butadiene from an ethanol feed comprising at least 80% by weight of ethanol, comprising a step for conversion of ethanol to acetaldehyde, a step for the extraction of butadiene, a step for scrubbing gaseous by-products with water, a step for eliminating impurities and brown oils, a step for treating effluents, a first butadiene purification step, and a subsequent butadiene purification step, said ethanol feed being supplied to said butadiene extraction step, the arrangement of the steps and recycles allowing the recycles to be maximized and allowing the water and energy consumption to be minimized.

Method for the production of butadiene from ethanol in one low-water- and low-energy-consumption reaction step

A process for the conversion of oil feeds for the production of low sulphur fuels by fixed bed hydrodemetallization of the feed using an upstream system of fixed bed swing reactors; fixed bed hydrocracking of the hydrodemetallized effluent in the presence of a hydrocracking catalyst; separation in order to obtain a heavy fraction; hydrodesulphurization of the heavy fraction in which hydrogen is reinjected.

Process for hydroconverting oil feeds in fixed beds for the production of low sulphur fuels

Production of 1,3-butadiene ethanol, that is more than 50% of the total weight of feedstock:

Process for producing 1,3-butadiene from a feedstock comprising ethanol

Embodiments provided here relate to second generation processes for the production of alcohols or solvents, wherein the lignocellulosic or cellulosic biomass undergoes a pre-treatment before being converted into ethanol after an enzymatic hydrolysis and fermentation. The glucidic polymers of the pre-treated plant material are hydrolysed by cellulases. The alcoholigenic microorganisms used for the ethanolic fermentation principally use hexoses, for example, glucose and mannose. The alcohols of the liquor, with or without separation of the suspended material are extracted by distillation. The stillage, containing pentoses which have not been used, are fermented into an ex-pentose ethanolic liquor and at least a portion of the liquor is recycled upstream of the enzymatic hydrolysis. The enzymatic hydrolysis and the ethanolic fermentation are thus carried out separately or simultaneously in the presence of a portion of the ethanolic liquor, which mixture does not interfere with the performance of the enzymes and microorganisms.

Process for the production of ethanol and solvents from lignocellulosic biomass with recycling of an ethanolic liquor obtained from the fermentation of pentoses

This invention describes a process for the production of second generation alcohols and/or solvents starting from cellulosic or lignocellulosic biomass wherein the lignocellulosic or cellulosic biomass undergoes a pretreatment before being converted into ethanol after an enzymatic hydrolysis and an ethylic fermentation, wherein glucidic polymers of the pretreated plant are hydrolyzed by cellulases; microorganisms that primarily use hexoses and preferably glucose and mannose are used for the ethylic fermentation; wines, with or without separation of materials in suspension are extracted by distillation; pentoses in the vinasses are fermented by a solventogenic microorganism into a butyl wine, and at least one portion of the butyl wine is recycled upstream from enzymatic hydrolysis.

Growing community of inventors

Lyons, France

Rejane Dastillung