Ifp Energies Nouvelles

Compagnie Generale Des Etablissements Michelin

Total Research & Technology Feluy

Jean-Christophe Gabelle

Kirill Drobyshev

Vincent Coupard

Nikolai Nesterenko

Rejane Dastillung

Matthieu Rolland

Nicolas Lopes Ferreira

Eszter Toth

Marcel Ropars

Helena Gonzalez Penas

Christophe Thille

Mickael Mejean

Belinda Perez Bibbins

Angelique Bisson

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 present invention relates to a process for cleaning a solid support of a fermentation reactor for the production of alcohols by fermentation using a sugary fluid, the solid support comprising a polyurethane foam inoculated with a biomass produced by a solvent-producing strain belonging to the genus, the process comprising placing the solid support in contact with a fluid originating from the fermentation must enriched in alcohol and/or acetone and/or an aqueous solution at basic pH.

Method for cleaning a solid support of a fermentation reactor comprising a contaminated polyurethane foam

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

A process for dehydrating an ethanol feedstock to give ethylene, includes: a) a vaporization stage; b) a heating stage; c) a dehydration stage in a multitubular reactor comprising tubes having a length of between 2 and 4 m, said tubes comprising a, preferably zeolitic, dehydration catalyst, the feedstock having an inlet temperature of greater than 400&#xb0; C. and less than 550&#xb0; C. and an inlet pressure of between 0.8 and 1.8 MPa, the heat transfer fluid having an inlet temperature of greater than 430&#xb0; C. and less than 550&#xb0; C. and a mass flow rate such that the ratio of the mass flow rates of the heat transfer fluid relative to the feedstock is greater than or equal to 10; d) separation into an effluent comprising ethylene and an aqueous effluent; e) purification of the aqueous effluent and separation of a stream of purified water and a stream of unconverted ethanol.

Low-energy consumption method for dehydrating ethanol into ethylene

This invention relates to a method for dehydration of alcohols into olefins comprising an improved step for recovery of unreacted alcohol.

Method for dehydrating alcohols into olefins comprising the recycling of alcohols

Growing community of inventors

Rueil-Malmaison, France

Jean-Christophe Gabelle