Production of adipic acid from acidic wash waters
AssigneeBASF SE
InventorsOtto-Alfred Grosskinsky, Norbert Petri, Johannes Hein, Hans Leitner
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Abstract
An improved process for producing adipic acid from the acidic wash waters which arise in the process for oxidizing cyclohexane with air, by treatment with nitric acid at from 10.degree. to 50.degree. C., with removal of the heat of reaction by external cooling, wherein the reaction mixture is led, at a flow velocity of at least 2.0 m/sec, as a thin layer spirally in counter-current to the coolant, under conditions which do not perturb the flow of the reaction mixture.
Claims8
In a process for producing adipic acid from the acidic wash waters which arise in the process for oxidizing cyclohexane with air, by treatment with nitric acid at from 10.degree. to 50.degree. C., with removal of the heat of reaction by external cooling, the improvement which comprises leading the reaction mixture at a flow velocity of at least 2.0 m/sec as a thin layer spirally in counter-current to the coolant, under conditions which do not perturb the flow of the reaction mixture.
Dependencies are inferred from the claim text.