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AssigneeChemische Werke Huls Aktiengesellschaft
InventorsManfred Kaufhold, Horst-Dieter Wulf
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Method for the recovery of cobalt as cobalt hydrocarbonyl from a water mono- or diacid, cobalt salt solution which is obtained from the cobalt removal from oxo alcohols, preferably after the addition of higher olefins. These solutions are treated with carbon monoxide and hydrogen under high pressure and high temperature in the presence of an organic solvent wherein the water, mono- or diacid cobalt solutions are treated with carbon monoxide and hydrogen in the presence of butanol, in which the butanol to solution ratio ranges from 1:2 through 1:5 at a temperature of between about 140.degree. C to 200.degree. C and a pressure of between about 100 and 300 atmospheres in a homogenous phase followed by cooling between about 0.degree. C and 110.degree. C and separation of the butanol-cobalt hydrocarbonyl phase from the water phase.
In the oxo process for converting higher olefins having 10 - 15 carbon atoms in the presence of a catalyst comprising cobalt hydrocarbonyl dissolved in a solvent, hydrogen and carbon monoxide to the respective oxo alcohols and decobalting said oxo alcohols with a first aqueous solution of an organic acid having 1 to 3 carbon atoms to form a second aqueous solution of an organic cobalt acid salt having 1 to 3 carbon atoms, the improvement comprising:
The process of preparing and separating an organic solution of cobalt hydrocarbonyl and catalyzing with said organic solution a reaction of an olefinic carbon compound with carbon monoxide and hydrogen which comprises initially treating an aqueous solution of an organic cobalt salt comprising a cobalt alkanoate having 1 to 18 carbon atoms which supplies Co.sup.++ ions with a gaseous mixture of hydrogen and carbon monoxide in the presence of a butanol selected from the group consisting of n-butylalcohol, isobutylalcohol, secbutylalcohol and mixtures thereof at a temperature from 140.degree. to 200 .degree. C, a volume ratio of said butanol to said aqueous solution of about 1 to 2 through 1 to 5, and pressures from about 100 to 300 atmospheres in homogenous liquid phase, cooling said homogenous liquid phase and discharging unconverted gases from the resulting reaction mixture, separating an organic liquid phase comprising the thus obtained butanol-cobalt hydrocarbonyl phase from an aqueous phase, recycling said organic liquid phase for said catalyzing a reaction and recycling said aqueous phase as a portion of said aqueous solution.
In the oxo process for converting higher olefins having 10 - 15 carbon atoms in the presence of a catalyst comprising cobalt hydrocarbonyl dissolved in a solvent, hydrogen and carbon monoxide to the respective oxo alcohols and decobalting said oxo alcohols with a first aqueous solution of an organic acid selected from the group consisting of formic acid, acetic acid, propionic acid and oxalic acid to form a second aqueous solution of an organic cobalt acid salt, the improvement comprising:
Dependencies are inferred from the claim text.