摘要:
The invention relates to a process for producing 1,3-butadiene from an ethanol-rich feedstock, i.e. in which the ethanol represents more than 50% of the total weight of said feedstock, comprising at least: A) a step of converting at least said ethanol-rich feedstock and the ethanol effluent resulting from the separation step B into a conversion effluent predominantly comprising 1,3-butadiene, water and ethylene, and into a hydrogen effluent, operating at a pressure between 0.1 and 1.0 MPa, at a temperature between 300°C and 500°C in the presence of at least one catalyst; B) a step of separating at least said conversion effluent resulting from A and the hydration effluent resulting from C into at least an ethanol effluent, a butadiene effluent, a water effluent and an ethylene effluent; C) an ethylene hydration step supplied at least by said ethylene effluent and/or said water effluent both resulting from the separation step B, in order to produce a hydration effluent comprising ethanol, said hydration effluent then being recycled to the separation step B.
摘要:
The invention relates to a method for the production of butadiene from an ethanol feedstock containing at least 80 wt.-% ethanol, comprising at least: a step A) of converting the ethanol into acetaldehyde, a step B) of converting an ethanol/acetaldehyde mixture into butadiene, a step C1) of treating the hydrogen, a step D1) of extracting the butadiene, a first step D2) of purifying the butadiene, a subsequent step D3) of purifying the butadiene, a step E1) of treating the effluent, a step E2) of eliminating impurities and brown oils, and a step F) of washing with water.
摘要:
The invention relates to a method for the production of butadiene from an ethanol feedstock containing at least 80 wt.-% ethanol, comprising: a step of converting the ethanol into acetaldehyde, a step of extracting the butadiene, a step of washing the gaseous by-products with water, a step of eliminating impurities and brown oils, a step of treating the effluent, a first step of purifying the butadiene, and a subsequent step of purifying the butadiene, said ethanol feedstock supplying the butadiene extraction step, and the organisation of the steps and recycling allowing recycling to be maximised and water and energy consumption to be minimised.
摘要:
The invention relates to a thermally integrated method for producing butadiene from butanol, which includes at least the following steps: a) dehydrating butanol, which process is supplied by a dehydration supply made up of at least said n-butanol feedstock diluted with at least a portion of the purified-water effluent from step c), resulting in a butene effluent in at least one reactor, in the presence of a catalyst including an alumina; b) oxidatively dehydrogenating said butene effluent, diluted with at least a portion of the purified-water effluent from step c), into butadiene, said butene effluent not having been treated in any way after dehydration step a); and c) separating the effluent obtained from step b) into at least one butadiene effluent and one purified-water effluent.