Process for reducing chromium in nonvolatile residue resulting from air oxidation of cyclohexane
AssigneeInuista North America S.àr.l.
InventorsLudovic Fodor, Bennett Haines Novak, Jules Charles Joseph Perilloux, Jr., Bhagya Chandra Sutradhar
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Abstract
Disclosed herein is a process for reducing or substantially eliminating chromium in non-volatile residue obtained from a certain processes, and particularly from cyclohexane oxidation processes.
Claims28
A process to separate chromium from non-volatile residue, said process comprising creating a composition comprising an organic phase and an aqueous phase by contacting chromium-containing non-volatile residue with an aqueous electrolyte solution, wherein chromium is extracted from the non-volatile residue into the aqueous phase, followed by separation of the aqueous phase from the organic phase, and, optionally, repeating the steps.
A process for hydrolyzing/decomposing chromium-containing compounds in non-volatile residue from an oxidation reaction comprising reacting non-volatile residue comprising chromium compounds with an acidic compound to create water soluble chromium salts.
A process for reduction of chromium content in non-volatile residue, said process comprising,
- (a) creating a composition comprising an organic phase and an aqueous phase by contacting non-volatile residue comprising chromium with an aqueous electrolyte solution, the organic phase comprising a non-volatile residue having a reduced amount of chromium and the aqueous phase comprising chromium, followed by separation of the aqueous phase from the organic phase and
- (b) reacting the non-volatile residue of the organic phase with an aquatic compound.
A process to reduce chromium from non-volatile residue produced by an oxidation reaction of an organic compound, the process comprising:
- creating a first composition having an organic phase comprising non-volatile residue and an aqueous phase comprising chromium by contacting non-volatile residue comprising chromium with a first aqueous electrolyte solution;
- separating the organic phase from the aqueous phase, wherein the organic phase comprises non-volatile residue having a reduced level of chromium;
- hydrolyzing chromium compounds in the non-volatile residue with a dilute acid solution;
- contacting the organic phase with a second aqueous electrolyte solution to create a second composition comprising an organic phase comprising non-volatile residue having a further reduced level of chromium and an aqueous phase comprising chromium;
- and
- separating the organic phase of the second composition from the aqueous phase of the second composition.
Dependencies are inferred from the claim text.