摘要:
A process for preparing a C5 aldehyde mixture from a hydrocarbon mixture comprising at least one linear butene by terminal hydroformylation under isomerizing conditions, using a catalyst system comprising rhodium, a bisphosphite ligand, and an amine.
摘要:
The invention relates to a method for producing low-odor n-butane by catalytic hydrogenation of a feed mixture. The aim of the invention is to provide such a method, wherein the feed material, in addition to n-butane, n-butene and up to 1 mass % formic acid and/or up to 1 mass % pentanals and/or up to 0.5 mass % pentanols, also comprises carbon monoxide. The aim is achieved by treating the feed mixture in the temperature range of 15 to 120° C. with an aqueous solution of an alkali metal or alkaline earth metal hydroxide in the concentration range of 0.5 to 30 mass % and subsequently subjecting the feed mixture to the catalytic hydrogenation.
摘要:
The invention relates to a method for continuously producing α,β-unsaturated C10-aldehydes from aliphatic C5-aldehydes, comprising the following steps: aldol-condensing aliphatic C5-aldehydes into α,β-unsaturated C10-aldehydes in the presence of an aqueous base in a tube reactor; phase separating the output of the tube reactor into an aqueous catalyst phase and an organic product phase; separating the organic product phase into α,β-unsaturated C10-aldehydes, aliphatic C5-aldehydes, and auxiliary products; discharging a part of the aqueous catalyst phase to remove the reaction water and supplementing said part with liquor solution and subsequently returning said part to the tube reactor. The task of the invention is to improve a method of said kind in a way such that it requires lower energy input. This is achieved in that the aliphatic C5-aldehydes and/or the α,β-unsaturated C10-aldehydes are dispersed in the aqueous base as drops, wherein the average Sauter diameter of the drops is between 0.2 mm and 2 mm.
摘要:
The invention relates to a method for continuously producing α,β-unsaturated C10-aldehydes from aliphatic C5-aldehydes, comprising the following steps: aldol-condensing aliphatic C5-aldehydes into α,β-unsaturated C10-aldehydes in the presence of an aqueous base in a tube reactor; phase separating the output of the tube reactor into an aqueous catalyst phase and an organic product phase; separating the organic product phase into α,β-unsaturated C10-aldehydes, aliphatic C5-aldehydes, and auxiliary products; discharging a part of the aqueous catalyst phase to remove the reaction water and supplementing said part with liquor solution and subsequently returning said part to the tube reactor. The task of the invention is to improve a method of said kind in a way such that it requires lower energy input. This is achieved in that the aliphatic C5-aldehydes and/or the α,β-unsaturated C10-aldehydes are dispersed in the aqueous base as drops, wherein the average Sauter diameter of the drops is between 0.2 mm and 2 mm.
摘要:
The invention relates to a method for producing α,β-unsaturated aldehydes, wherein a catalytic aldol condensation of charged aldehydes is carried out in the presence of an aqueous base within a continuous-flow reactor. The aim of the invention is to provide a method for aldolizing aldehydes that can be carried out in a particularly economical manner. The aim is achieved by using a reaction mixing pump as the reactor.
摘要:
The invention relates to a method for producing α,β-unsaturated aldehydes, wherein a catalytic aldol condensation of charged aldehydes is carried out in the presence of an aqueous base within a continuous-flow reactor. The aim of the invention is to provide a method for aldolizing aldehydes that can be carried out in a particularly economical manner. The aim is achieved by using a reaction mixing pump as the reactor.
摘要:
A process for preparing a C5 aldehyde mixture from a hydrocarbon mixture comprising at least one linear butene by terminal hydroformylation under isomerizing conditions, using a catalyst system comprising rhodium, a bisphosphite ligand, and an amine.
摘要:
The invention relates to a process for preparing a mixture of isomeric decane-carboxylic acids, which comprises the following steps:a) hydroformylation of a hydrocarbon mixture containing linear C4-olefins using a rhodium-containing catalyst system;b) aldol condensation of a mixture of aliphatic C5-aldehydes obtained from step a);c) selective hydrogenation of the mixture of unsaturated C10-aldehydes from step b) to aliphatic C10-aldehydes;d) uncatalysed oxidation of the mixture of aliphatic C10-aldehydes from step c) to give a mixture having a proportion of at least 70% by mass of 2-propylheptanoic acid, based on the total content of isomeric decanecarboxylic acids.
摘要:
The invention relates to a one-stage continuous process for hydroformylating olefins having at least 5 carbon atoms to the corresponding aldehydes and/or alcohols having at least 6 carbon atoms in the presence of unmodified cobalt catalysts in a process in which, in the presence of an aqueous phase and of an organic phase, catalyst formation, catalyst extraction and hydroformylation proceed in the same reactor, which is characterized in that more aqueous cobalt salt solution is fed into the reactor as an aqueous phase with the liquid reaction mixture and is discharged from the reactor with the gas phase, and in that the level of the aqueous bottom phase is kept constant by continuously conducting a portion of the aqueous bottom phase out of the reactor.
摘要:
The invention relates to a process for preparing a mixture of isomeric decane-carboxylic acids, which comprises the following steps: a) hydroformylation of a hydrocarbon mixture containing linear C4-olefins using a rhodium-containing catalyst system; b) aldol condensation of a mixture of aliphatic C5-aldehydes obtained from step a); c) selective hydrogenation of the mixture of unsaturated C10-aldehydes from step b) to aliphatic C10-aldehydes; d) uncatalysed oxidation of the mixture of aliphatic C10-aldehydes from step c) to give a mixture having a proportion of at least 70% by mass of 2-propylheptanoic acid, based on the total content of isomeric decanecarboxylic acids.