摘要:
The invention relates to improvements in internal loop reactors. The reactor of the invention is characterized by a plurality of cooling tubes which form the annulus between the riser and the downcomer path of said internal loop reactor. The reactor also provides improvements in hydroformylation reactions using the improved reactor.
摘要:
Cobalt is recovered from the oil/water mixed reaction product of oxonation by increasing the carbon dioxide level in the reaction product and adjusting the temperature to enhance the carbon dioxide level in the oil water phase to promote the formation of cobalt carbonate which is allowed to settle and may be removed and/or recycled increasing cobalt utilization and reducing environmental problems.
摘要:
Oxo-alcohols in the plasticiser range typically contain small amounts of methyl esters having the same alkyl chain as the alcohol itself. These methyl esters are causing product quality problems and environmental problems because of transesterification in the esterification process where the plasticiser ester derivatives are produced. A process using controlled oxonation and hydrogenation conditions is disclosed for the production of alcohols containing low amounts of methyl esters. Plasticiser esters with low amounts of aliphatic di-alkyl esters are also disclosed.
摘要:
In a hydroformylation reaction, the circulation and recovery of cobalt carbonyl in a cobalt catalyst cycle using carbonylate as an intermediate and acidification thereof, is improved by supplying an aqueous sulfuric acid solution containing less than 16% wt of sulfuric acid to the carbonylate to control sulfuric acid concentration in the carbonylate/acid mixture, before accounting for any acid consuming reaction, to a value of from 2% to 10% by weight. Single step and multistage liquid/liquid extraction techniques as well as vapour/liquid extraction techniques followed by the absorption of cobalt from the vapour in an organic liquid both benefit from this improvement.
摘要:
The disclosure generally relates to a process for the production of a C6-C15 alcohol mixture including the steps of hydroformylating an olefin mixture including at least one branched C5-C14 olefin to form a hydroformylation product including aldehydes and formates; feeding the hydroformylation product into a hydrogenation step including contacting, in at least one first hydrogenation reactor, at least one catalyst, water, hydrogen, and the hydroformylation product to convert the hydroformylation product to a C6-C15 alcohol mixture; wherein the hydrogen is supplied from the decomposition of the formates and at least one source external to the at least one first hydrogenation reactor.
摘要:
Embodiments of the invention disclosed herein relate to a process for the production of a C6-C15 alcohol mixture comprising the steps of: hydroformylating an olefin mixture comprising a branched C5-C14 olefin to form a hydroformylation product comprising aldehydes and formate esters, whereby the hydroformylation product has a net cold sap number from 15 to 38 mg KOH/g, and converting the aldehydes and formate esters to alcohols in a hydrogenation step comprising at least one first hydrogenation reactor comprising a fixed bed of a heterogeneous sulphided bimetallic catalyst.
摘要:
The gas cycle in a high pressure hydroformylation reaction using a series of at least two reactors is controlled to optimise yield, conversion and selectivity and to control reaction temperature. The control is achieved through balancing fresh gases and recycle gases in each of the reactors and as an optional feature the use of hydrogen off gases from the downstream hydrogenation used in the conversion of the hydroformylation reaction product to product alcohols.
摘要:
The higher alcohol yield of a hydroformylation process including hydroformylation, catalyst removal, hydrogenation and higher alcohol separation stages is improved by subjecting the Heavy Oxo Fraction (HOF) obtained following higher alcohol separation to steam cracking in the presence of a catalyst system comprising a dehydration-catalytic metal on an acidic support. The resultant cracked HOF mixture comprising a major proportion of olefin and saturated hydrocarbon is recycled to the hydroformylation stage.
摘要:
Embodiments of the invention disclosed herein relate to a process for the production of a C6-C15 alcohol mixture comprising the steps of: hydroformylating an olefin mixture comprising a branched C5-C14 olefin to form a hydroformylation product comprising aldehydes and formate esters, whereby the hydroformylation product has a net cold sap number from 15 to 38 mg KOH/g, and converting the aldehydes and formate esters to alcohols in a hydrogenation step comprising at least one first hydrogenation reactor comprising a fixed bed of a heterogeneous sulphided bimetallic catalyst.