Ifp Energies Nouvelles

Total Research & Technology Feluy

Total Petrochemicals Research Feluy

Stephanie Fleurier

Vincent Coupard

Walter Vermeiren

Delphine Minoux

Cindy Adam

Philip De Smedt

Natacha Touchais

Nikolai Nesterenko

Thomas Plennevaux

Sylvain Louret

Caroline Aymard

Eszter Toth

Helena Gonzalez Penas

Larissa Perotta

Emilie Kobel

Pierre-Antoine Bouillon

Pierre Antoine Bouillon

The invention relates to a process for dehydration of an ethanol feedstock into ethylene comprising at least the stages:

Process for dehydration of ethanol into ethylene using pretreatment of the feedstock

A process for dehydration of an ethanol feedstock to ethylene by:

Process for dehydration of ethanol to ethylene at low energy consumption

Process for the production of ethylene from an ethanol feedstock that comprises these stages:

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The process for the production of alcohol and/or solvent from a biomass feedstock comprises the stages for pretreatment (P) of the biomass feedstock, for enzymatic hydrolysis (Hand HF), and for fermenting the hydrolyzate (HF). To prevent solids from being sent and to facilitate operating the section for purifying the fermentation products, at least a portion of the solid material in the fermentation wine is extracted (Ex) to obtain a stream of solid residue () comprising lignin and a fermentation wine () that is low in solid material. Then, the stream of solid residue is washed (L) with a liquid stream to recover a liquid stream that is enriched with fermentation products (). The liquid stream that is enriched with fermentation products () is recycled in the enzymatic hydrolysis stage (H) to recover any fermentation product and to increase the overall yield of the process.

Method for producing alcohols and/or solvents from lignocellulosic biomass with washing of the solid residue obtained after fermentation

The process for the production of alcohol and/or solvent from a biomass feedstock comprises the stages for pretreatment (P) of the biomass feedstock, for enzymatic hydrolysis (H) of the pretreated substrate, and for fermenting the hydrolyzate (F). To reduce the size of the fermenters, at least a portion of the solid residue contained in the hydrolyzate is extracted (Ex) in such a way as to obtain a stream of solid residue () comprising lignin and a hydrolyzate () that is low in solid residue. Then, the stream of solid residue is washed (L) with a liquid stream in such a way as to recover a sugar-enriched liquid stream (). The sugar-enriched liquid stream () is recycled in the enzymatic hydrolysis stage (H) to be able to upgrade the sugars without providing dilution of the streams in the process.

Process for the production of alcohols and/or solvents from lignocellulosic biomass with washing of the solid residue obtained after hydrolysis

A process for dehydration of an ethanol feedstock into ethylene, comprising the vaporization of said ethanol feedstock in a mixture with at least a portion of the recycled purified water stream from heat exchange with the effluent that is obtained from the last reactor.

Process for dehydration of ethanol into ethylene with low energy consumption

A process for dehydration of an ethanol feedstock into ethylene, comprising the vaporization of said dilute hydrated ethanol feedstock in an exchanger, with heat exchange with the effluent that is obtained from a last reactor, with said mixture being introduced into said vaporization stage at a pressure that is lower than the pressure of the effluent that is obtained from the last reactor, the compression of the mixture that is vaporized in a compressor, the introduction of the vaporized and compressed mixture, into at least one adiabatic reactor that contains at least one dehydration catalyst.

Growing community of inventors

Lyons, France

Stephanie Fleurier