# US 11,993,559 B2 · Method for treating an alcohol feedstock for the production of olefins > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,993,559 B2 - Document ID: US11993559B2 - Status: Granted - Kind: B2 - Application number: 17/415,910 - Filed: 2019-11-27 - Published: 2022-03-03 - Granted: 2024-05-28 - Earliest claimed: 2018-12-20 - Assignees: Total Research & Technology Feluy; IFP Energies Nouvelies - Applicants: Total Research & Technology Feluy; IFP Energies Nouvelles - Inventors: Nicolas Aribert; Ludovic Chahen; Arnaud Lanoue; Vincent Coupard; Nikolai Nesterenko - Web page: https://patentgrep.com/patent/US11993559B2 ## CPC - B01D 3/002: {by continuous methods} - C07C 29/80: by distillation - B01D 3/001: {Processes specially adapted for distillation or rectification of fermented solutions} - B01D 3/007: {Energy recuperation; Heat pumps} - B01D 3/009: {in combination with chemical reactions} - B01D 3/06: Flash distillation - B01D 3/148: {in combination with at least one evaporator} - B01D 3/40: Extractive distillation - C07C 29/88: by treatment giving rise to a chemical modification of at least one compound (chemisorption C07C29/76) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS ## Abstract The invention relates to a process for treating an alcoholic feedstock, comprising: a) a stage of preheating of said alcoholic feedstock to a temperature of between 70° C. and 200° C.; b) a stage of pretreatment on an acidic solid, operating at a temperature of between 70° C. and 200° C., to produce a pretreated alcoholic feedstock; c) a stage of partial vaporization to produce a vaporized stream and a liquid stream; and d) a stage of purification of the liquid stream resulting from stage c), to give a stream rich in water, a stream rich in monoalcohol and a stream rich in impurities. ## Claims ### Claim 1 A process for treating an alcoholic feedstock containing at least one monoalcohol, comprising the following stages: a) a stage of preheating of said alcoholic feedstock to a temperature of between 70° C. and 200° C., to produce a preheated alcoholic feedstock; b) a stage of pretreatment of said preheated alcoholic feedstock on an acidic solid, operating at a temperature of between 70° C. and 200° C., to produce a pretreated alcoholic feedstock; c) a stage of partial vaporization of a vaporization feedstock to produce a gaseous stream and a liquid stream, said vaporization feedstock comprising said pretreated alcoholic feedstock obtained at the end of stage b), said partial vaporization stage comprising a partial vaporization section fed with said vaporization feedstock at an inlet pressure of between 0.1 and 1.4 MPa, to produce said gaseous stream and said liquid stream such that the gaseous stream represents at least 70% by weight of the weight of the vaporization feedstock; d) a stage of purification of the liquid stream resulting from stage c), to give a stream rich in water, a stream rich in monoalcohol and a stream rich in impurities. ### Claim 2 (depends on 1) The treatment process as claimed in claim 1, wherein said alcoholic feedstock is an alcohol feedstock produced from renewable resources derived from biomass. ### Claim 3 (depends on 1) The treatment process as claimed in claim 1, wherein said monoalcohol is selected from ethanol, n-propanol, isopropanol, isobutanol, and mixtures thereof. ### Claim 4 (depends on 1) The treatment process as claimed in claim 1, wherein pretreatment stage b) is operated at a temperature of between 100° C. and 180° C. ### Claim 5 (depends on 1) The treatment process as claimed in claim 1, wherein said acidic solid is chosen from acidic clays, zeolites, sulfated zirconias, and acidic resins. ### Claim 6 (depends on 5) The treatment process as claimed in claim 5, wherein said acidic solid is an acidic resin which possesses an exchange capacity of at least 0.1 mmol H+ equivalent per gram. ### Claim 7 (depends on 1) The treatment process as claimed in claim 1, wherein the water content of the vaporization feedstock is between 10% and 75% by weight of water relative to the total weight of the vaporization feedstock. ### Claim 8 (depends on 1) The treatment process as claimed in claim 1, wherein said vaporization feedstock additionally comprises a recycled stream of water purified according to stage d) and/or a stream of external water. ### Claim 9 (depends on 1) The treatment process as claimed in claim 1, wherein said partial vaporization section comprises a heat exchanger and a flash evaporator. ### Claim 10 (depends on 1) The treatment process as claimed in claim 1, wherein said partial vaporization section is fed with said vaporization feedstock at an inlet pressure of between 0.2 and 0.6 MPa. ### Claim 11 (depends on 1) The treatment process as claimed in claim 1, wherein the gaseous stream resulting from said partial vaporization section represents at least 80% by weight of the weight of the vaporization feedstock. ### Claim 12 (depends on 1) The treatment process as claimed in claim 1, wherein the gaseous stream represents a proportion of 70% by weight to 98% by weight of the weight of the vaporization feedstock. ### Claim 13 (depends on 1) The treatment process as claimed in claim 1, wherein the temperature of said vaporization feedstock is adjusted in said partial vaporization section to a temperature of between 110° C. and 250° C. ### Claim 14 (depends on 1) The treatment process as claimed in claim 1, wherein, during said purification stage d), said liquid stream resulting from stage c) is purified by stripping. ### Claim 15 (depends on 1) The treatment process as claimed in claim 1, wherein said stream rich in said monoalcohol recovered at the top of the purification section of said staged) is at least partially recycled and mixed with the gaseous stream obtained at the end of stage c). ### Claim 16 (depends on 1) The treatment process as claimed in claim 1, wherein at least a portion of said stream of purified water resulting from stage d) is recycled to the inlet of stage c) and mixed with the pretreated alcoholic feedstock obtained at the end of pretreatment stage b) to produce the vaporization feedstock, and/or recycled to the outlet of stage c) and mixed with the gaseous stream obtained at the end of said partial vaporization stage c). ### Claim 17 (depends on 1) The treatment process as claimed in claim 1, wherein said alcoholic feedstock is an alcohol feedstock produced by fermentation of biomass. ### Claim 18 (depends on 1) The treatment process as claimed in claim 1, wherein pretreatment stage b) is operated at a temperature of between 110° C. and 160° C. ### Claim 19 (depends on 5) The treatment process as claimed in claim 5, wherein said acidic solid is a cation exchange resin which possesses an exchange capacity of at least 0.1 mmol H+ equivalent per gram. ### Claim 20 (depends on 1) The treatment process as claimed in claim 1, wherein the gaseous stream resulting from said partial vaporization section represents at least 90% by weight of the weight of the vaporization feedstock. ### Claim 21 (depends on 1) The treatment process as claimed in claim 1, wherein the gaseous stream represents a proportion of 70% by weight to 95% by weight of the weight of the vaporization feedstock.