摘要:
The present invention relates to a method of separating an olefin from a gas stream, said gas stream comprising the olefin and at least one other component, said method comprising (i)compressing and cooling the gas stream; (ii) separating the olefin from the gas stream by absorbing the olefin in an absor-bent; (iii) separating the olefin from the absorbent by desorption; wherein compressing or cooling or compressing and cooling in (i) is carried out at least twice.
摘要:
The invention relates to a method and a device for the continuous production of a chemical compound in at least one reactor. At least one of the reactors is a pipe assembly reactor which comprises a covering and at least one inner pipe (9) which is arranged in the covering. The invention is characterised in that at least one of the inner pipes arranged in the area where it is surrounded by a covering, at least partially comprises a non-circular transversal cross-section and is helically shaped.
摘要:
The invention relates to a method for the continuous distillation of the solvent used in oxirane synthesis by reaction of a hydroperoxide with an organic compound, characterised in that the mixture arising after the synthesis and subsequent working up, which comprises the solvent, is separated in a partition-wall column into a low-, middle- and high-boiling fraction and the solvent drawn off as middle-boiling fraction from the side tap of the column.
摘要:
The invention relates to a method for the continuous purification by distillation of methanol, used as a solvent in the synthesis of propylene oxide by the reaction of a hydroperoxide with propylene, with the simultaneous isolation of the methoxy propanols as an azeotropic mixture with water, in addition to the low and high boilers. Said method is characterised in that the solvent mixture that accumulates during the synthesis is separated in a dividing wall column.
摘要:
A method for the production of tetrahydrogeranylacetone is disclosed, whereby pseudoionone, geranylacetone and/or dihydrogeranylacetone in the liquid phase, in which particles of a catalyst, for the preferential hydrogenation of carbon-carbon double bonds before carbon-oxygen double bonds, are suspended, is fed through a device along in the presence of a gas comprising hydrogen, said device preventing the transport of the catalyst particles.
摘要:
A method of separating propylene oxide from a mixture (M) comprising propylene oxide and methanol, said method comprising: (i) introducing said mixture (M) into an extractive distillation column; (ii) additionally introducing an extracting solvent into said extractive distillation col-umn; (iii) distilling propylene oxide overhead from said extractive distillation column as top stream; (iv) withdrawing a bottoms stream from said extractive distillation column; (v) compressing the top stream obtained overhead in (iii) by means of at least one compressor to give a compressed vapor.
摘要:
The invention relates to a method for producing propylene oxide, at least comprising steps (i) and (ii): (i) providing a catalyst containing at least one porous oxidic material; (ii) reacting propene with a hydroperoxide in at least one nitrile serving as a solvent or in a solvent mixture containing at least one nitrile in the presence of the catalyst in accordance with (i). The invention is characterized in that at least one porous oxidic material is a zeolite having a radiographic correspondence to the MWW type.
摘要:
The invention relates to a continuous method for the epoxidation of olefins with hydroperoxide, characterised in that epoxidation is carried out in a reactor which contains at least one catalyst suspended in a liquid phase. The catalyst is guided through a device which is incorporated into the reactor and which comprises openings and channels. The invention is also characterised in that the catalyst is retained in a reaction system by means of transversal filtration during the separation of the liquid-containing epoxide.
摘要:
The invention relates to a continuous method of purification by distillation of 1,2-propylene glycol that accumulates as a by-product during the synthesis of propylene oxide. Said method is characterised in that the mixture that is produced during said synthesis, which contains the 1,2-propylene glycol, is separated in a dividing wall column into a low-boiler, medium-boiler and high-boiler fraction and that 1,2-propylene glycol is drawn off laterally from the column as a medium boiler.
摘要:
A method for the production of tetrahydrogeranylacetone is disclosed, whereby pseudoionone, geranylacetone and/or dihydrogeranylacetone in the liquid phase, in which particles of a catalyst, for the preferential hydrogenation of carbon-carbon double bonds before carbon-oxygen double bonds, are suspended, is fed through a device along in the presence of a gas comprising hydrogen, said device preventing the transport of the catalyst particles.