摘要:
The present invention relates to a method for separating a liquid crude aldehyde mixture by distillation. Said mixture contains unbranched and branched aldehydes. In a first distillation column, the product mixture is separated into a first product flow of branched aldehyde, a product flow of unbranched aldehyde and an additional product flow which contains unbranched aldehyde and the high-boiling components. In a second distillation column whose product flow is smaller by a factor of 50 to 200 than the product flow from the first distillation column, the additional product flow is then separated into a product flow of unbranched aldehyde and a high-boiling product flow.
摘要:
A process is disclosed for hydroformylating olefins with 12 to 100 C atoms in the presence of a cobalt carbonyl catalyst, under pressures from 100 to 400 bars and at a temperature from 100 to 200 °C. After expansion the cobalt catalyst is recovered by extraction with an aqueous acid solution in the presence of atmospheric oxygen. The extraction is carried out (a) in the presence of a polymer emulsion breaker selected in the group of the alkoxylated compounds which contain amino-, imino- or OH-groups, and (b) during a coalescence phase, larger drops of the dispersed aqueous phase are caused to form in the organic phase which still contains small amounts of aqueous phase to achieve a complete phase separation.
摘要:
Disclosed is a method for the hydroformylation of olefins comprising 2 to 8 carbon atoms, whereby (i) an inflow containing olefins and an added saturated hydrocarbon comprising 2 to 8 carbon atoms, as well as carbon monoxide and hydrogen, are fed into a reaction zone and reacted in the presence of a hydroformylation catalyst, (ii) a flow consisting essentially of unreacted olefins and saturated hydrocarbons is separated from the discharge from the reaction zone, (iii) said flow is separated into an olefin-enriched fraction and an olefin-depleted fraction by means of rectification, and (iv) the olefin-enriched fraction is at least partially redirected into the reaction zone.
摘要:
The present invention relates to a method for separating a liquid crude aldehyde mixture by distillation. Said mixture contains unbranched and branched aldehydes. In a first distillation column, the product mixture is separated into a first product flow of branched aldehyde, a product flow of unbranched aldehyde and an additional product flow which contains unbranched aldehyde and the high-boiling components. In a second distillation column whose product flow is smaller by a factor of 50 to 200 than the product flow from the first distillation column, the additional product flow is then separated into a product flow of unbranched aldehyde and a high-boiling product flow.
摘要:
Disclosed is a method for the hydroformylation of olefins comprising 2 to 8 carbon atoms, whereby (i) an inflow containing olefins and an added saturated hydrocarbon comprising 2 to 8 carbon atoms, as well as carbon monoxide and hydrogen, are fed into a reaction zone and reacted in the presence of a hydroformylation catalyst, (ii) a flow consisting essentially of unreacted olefins and saturated hydrocarbons is separated from the discharge from the reaction zone, (iii) said flow is separated into an olefin-enriched fraction and an olefin-depleted fraction by means of rectification, and (iv) the olefin-enriched fraction is at least partially redirected into the reaction zone.
摘要:
The invention relates to a method for the continuous hydroformylation of polyalkenes having 30 to 700 carbon atoms and being unsaturated essentially once. The inventive method involves i) producing a cobalt carbonyl catalyst which is active for hydroformylation from a catalyst precursor which is dissolved in an aqueous phase, in the absence of the polyalkenes, ii) hydroformylating the polyalkenes with synthesis gas in the presence of the cobalt carbonyl catalyst in a reaction zone, and iii) separating the cobalt carbonyl catalyst from the discharge from the reaction zone while at least partially regenerating the catalyst precursor, and returning the catalyst precursor to step i).
摘要:
A process is disclosed for hydroformylating olefins with 12 to 100 C atoms in the presence of a cobalt carbonyl catalyst, under pressures from 100 to 400 bars and at a temperature from 100 to 200 °C. After expansion the cobalt catalyst is recovered by extraction with an aqueous acid solution in the presence of atmospheric oxygen. The extraction is carried out (a) in the presence of a polymer emulsion breaker selected in the group of the alkoxylated compounds which contain amino-, imino- or OH-groups, and (b) during a coalescence phase, larger drops of the dispersed aqueous phase are caused to form in the organic phase which still contains small amounts of aqueous phase to achieve a complete phase separation.