摘要:
Process for separating propane and propylene using a distillation column and at least one membrane separation unit constituted by one or more modules operating in series, said membrane separation unit being placed either upstream, or downstream, or upstream and downstream of the distillation column.
摘要:
Process for separating propane and propylene using a distillation column and at least one membrane separation unit constituted by one or more modules operating in series, said membrane separation unit being placed either upstream, or downstream, or upstream and downstream of the distillation column.
摘要:
The invention relates to a process for converting a hydrocarbons charge comprising linear and branched olefins comprising the following stages: a) a stage of membrane separation of the hydrocarbon charge under conditions making it possible to produce a cut β containing the majority of the linear olefins present in said charge, and a cut γ containing the majority of the branched olefins, b) a stage of treatment of the linear olefins contained in the effluents originating from the membrane separation stage (cut β) under moderate oligomerization conditions, c) a stage of distillation separation of the effluents originating from the oligomerization stage into at least two cuts, d) a stage of hydrogenation of the cut η under conditions for obtaining a gas oil with a high cetane number.
摘要:
The invention relates to a process for converting a hydrocarbon charge of linear and branched olefins, comprises the following stages: a) a stage of membrane separation of the hydrocarbon charge under conditions making it possible to produce a cut β containing the majority of the linear olefins present in said charge, and a cut γ containing the majority of the branched olefins, b) a stage of treatment of the linear olefins contained in the effluents originating from the membrane separation stage (cut β) under moderate oligomerization conditions, c) a stage of distillation separation of the effluents originating from the oligomerization stage into at least two cuts, d) a stage of hydrogenation of the cut η under conditions for obtaining a gas oil with a high cetane number.
摘要:
The invention relates to a process for conversion of a gasoline-range hydrocarbon feed into a gasoline fraction with a higher octane rating than that of the feedstream, and a gasoil fraction with a cetane number higher than 45, including the following steps: a) a membrane separation step (B) applied to the hydrocarbon feed under conditions enabling selective separation of the majority of the linear olefins present in said feed and constituting the β fraction, the fraction containing the majority of the branched olefins, termed the γ fraction, constituting a gasoline with a high octane rating, greater than that of the feed, b) an oligomerisation step (C) applied to the linear olefins (β fraction) contained in the effluent stream from the membrane separation step (B) under moderate oligomerisation conditions, c) a distillation separation step (D) applied to the effluent stream arising from the oligomerisation step in at least two fractions, d) a hydrogenation step (E) applied to one of the fractions obtained at step c).
摘要:
The invention relates to a process for conversion of a gasoline-range hydrocarbon feed into a gasoline fraction with a higher octane rating than that of the feedstream, and a gasoil fraction with a cetane number higher than 45, including the following steps: a) a membrane separation step (B) applied to the hydrocarbon feed under conditions enabling selective separation of the majority of the linear olefins present in said feed and constituting the β fraction, the fraction containing the majority of the branched olefins, termed the γ fraction, constituting a gasoline with a high octane rating, greater than that of the feed; b) an oligomerisation step (C) applied to the linear olefins (β fraction) contained in the effluent stream from the membrane separation step (B) under moderate oligomerisation conditions; c) a distillation separation step (D) applied to the effluent stream arising from the oligomerisation step in at least two fractions; d) a hydrogenation step (E) applied to one of the fractions obtained at step c).
摘要:
The present invention describes a method of producing fatty acid alkyl esters and glycerin implementing a set of transesterification reactions between a vegetable or animal oil and an aliphatic monoalcohol in the presence of a heterogeneous solid catalyst so as to obtain an effluent comprising at least alkyl esters, free glycerol, bonded glycerol and alcohol, wherein at least one stage of separation of at least a portion of the effluent is carried out in order to separate the ester produced and the bonded glycerol, said separation occurring through a membrane.
摘要:
The invention relates to a method for isomerising typically paraffinic hydrocarbon fractions having 5-7 carbon atoms consisting in using a membrane separation unit which is supplied by an overhead flux from a deisohexaniser which makes it possible to maximise the isopentane quantity in isomerate. Said invention makes it possible to definitely improve the isomerate RON and MON indices by the inventive method.
摘要:
The invention relates to a method and to a plant for processing a gas by means of a glycol solution wherein a feed comprising a gas, a glycol, water and salts is subjected to a first stage (5) of separating the gas from a liquid effluent and said liquid effluent is subjected to a dehydration stage (14) to recover a dehydrated liquid effluent, characterized in that the salts contained in the liquid effluent, dehydrated or not, are eliminated in a membrane separation stage (10) by means of a driving force generated by mechanical pressure difference on either side of a membrane of pore size ranging between 5 and 100 Angstrom. The invention also relates to the use of the method and of the plant for regeneration of a liquid compound of the glycol family used for hydrate formation prevention when using a natural gas.
摘要:
In a process for producing fatty acid alkyl esters and glycerol comprising at least one reaction stage in which a charge comprising a vegetable and/or animal oil and an alcohol are brought into contact, in the presence of a heterogeneous catalyst, so as to obtain an effluent comprising at least alkyl esters, glycerol and alcohol, and at least one separation stage during which a separation is carried out of at least one portion of the effluent so as to separate an alcohol-rich effluent and an alkyl esters-rich effluent, at least one separation stage consists of a membrane separation using at least one alcohol-permeable membrane.