摘要:
The invention relates to a method for reprocessing a liquid product of a hydroformylation reaction, wherein the liquid phase produced in a release stage is supplied to a separating device from which a liquid flow containing rhodium is guided away via a filter, where solids thereby separated are taken out of the process and the filtrate obtained is guided back into the hydroformylation reaction.
摘要:
The invention relates to a method for reprocessing a liquid product of a hydroformylation reaction, wherein the liquid phase produced in a release stage is supplied to a separating device from which a liquid flow containing rhodium is guided away via a filter, where solids thereby separated are taken out of the process and the filtrate obtained is guided back into the hydroformylation reaction.
摘要:
Wastewater from the aldolization reaction is purified by adjusting its pH to 0 to 6, followed by extraction with monohydric alcohols having at least 8 carbon atoms, hydrocarbons having at least 6 carbon atoms, and mixtures thereof. In some cases, adjustment of the pH causes the formation of an organic phase, which is separated from the remaining wastewater before extraction.
摘要:
In a method for preparing 1-hydroxy-1,1-diphosphonic acid compounds of the general formula I and/or of their pharmacologically compatible salts a compound of the formula II is reacted with a compound P(OSiR53)3-pR6p and the reaction product is hydrolyzed.
摘要:
Mixtures of isomeric decyl alcohols obtained by oligomerization of propylene in the presence of deactivated zeolites as catalysts, followed by separation of the nine carbon olefins from the oligomer mixture, then hydroformylation of the 9 carbon olefins to 10 carbon aldehydes, and hydrogenation of the aldehydes to the corresponding alcohols. The mixtures, when esterified with phthalic acid, or anhydride, provide a mixture of isomeric di-decyl phthalates that can be used as plasticizers.
摘要:
Mixtures of isomeric decyl alcohols prepared by hydroformylation of mixtures of butene-1 and butene-2 in two stages to give aldehyde mixtures, and condensation of the aldehyde mixtures to form an aldol mixture, followed by separation and hydrogenation. The first stage of the hydroformylation proceeds in the presence of rhodium catalysts dissolved in water, the second stage in the presence of cobalt catalysts homogeneously dissolved in the reaction medium. The mixture of isomeric decyl alcohols, when esterified with phthalic acid, yields a mixture of isomeric decyl phthalates which are useful as plasticizers.
摘要:
Aqueous solutions of .sup.99 technetium salts wherein the .sup.99 technetium is in reduced valencey state, when administered to mammals, permit identification of the skeleton and of calcareous tumors by scintigraphy (radiographic scanning). The solutions are conveniently prepared by mixing one or more phosphonic acids (or their salts) with one or more reducing salts, and adding the mixture to an aqueous solution of a pharmaceutically acceptable .sup.99 pertechnetate salt. Reduction of the valence of the technetium occurs rapidly, and the resulting solution is adequately stable for use in scintigraphy.The phosphonic acid and reducing salt components can be premixed. Aqueous solutions of the premix are stable for long periods of time in the absence of free oxygen and the premix is stable to air so long as it is dry.
摘要:
A process for preparing sulfonated arylphosphines by reaction of arylphosphines with oleum, wherein, after reaction of the arylphosphines with oleum, the sulfonation mixture is firstly diluted with water, an inert gas stream is then passed through the diluted sulfonation mixture until SO2 is no longer liberated from the diluted sulfonation mixture and the latter is then worked up further in a customary manner and its use.
摘要:
In a system for individual dosing of a medicament, in accordance with the individual pathological properties (“fingerprint”) of a patient—corresponding physiologically or genetically to the disease status—two components are provided: a medicament that is to be taken or administered in a variable individual dosage and a miniaturized indicator system that obtains information from blood, saliva or other bodily fluids and tissues of the patient and displays the information in a readable form so that the patient or the treating physician can immediately read the optimal active substance to be taken or dosage to be administered.
摘要:
Isomeric mixtures of pentanoic acids are prepared by subjecting butene-1/butene-2 mixtures to hydroformylation to form aldehyde mixtures, followed by oxidation of the aldehyde mixtures which have been separated off from the reaction product. The hydroformylation is carried out in a heterogeneous system in the presence of rhodium catalysts which are dissolved in water. The mixture of isomeric 5 carbon monocarboxylic acids produced, when esterified with polyhydric alcohols, yields mixtures of isomeric esters which are useful as lubricants for refrigerant compressors operated with chlorine-free, at least partly fluorinated hydrocarbons as the refrigerant.