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US 11,479,523 B2Granted
Single step process for the oxidation of cyclohexane
AssigneeCouncil of Scientific and Industrial Research
InventorsThirumalaiswamy Raja, Shatabdi Porel Mukherjee, Marimuthu Prabhu, Yogita Manikroa Shikre
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Abstract
The present invention disclosed a single step process for the conversion of cyclohexane to adipic acid by using manganese oxide, tungsten oxide or Mn—WOx nano structure having improved yield and selectivity.
Claims7
A single step process for conversion of cyclohexane to adipic acid, the process comprising:
- adding cyclohexane, a solvent and a catalyst to a reactor followed by charging oxygen with a pressure in a range of 0-30 bars at a temperature ranging from 100-125° C. under constant stirring for a period in a range of 5 to 6 hours to afford adipic acid, wherein the catalyst is Mn-WOx nanostructure, wherein the Mn-WOx nanostructure catalyst is in the form of a nanorod, a nanoseed or a fish bone structure, and wherein yield of adipic acid is in a range of 20-40%.
A process for the preparation of Mn with Tungsten oxide fish bone catalyst, the process comprising the steps of:
- a) dissolving sodium tungstate dihydrate, manganese (II) sulfate monohydrate and metal sulphates in a suitable solvent at a temperature ranging from 25-30° C. to form a solution;
- b) adjusting the pH of the solution of step (a) up to 0.5 to 5 by constant stirring for 30-50 mins;
- c) heating the solution of step (b) at a temperature ranging from 100-250° C. for a time period ranging from 24-72 hours;
- d) cooling the solution of step (c) up to 25-30° C. to afford Mn with Tungsten oxide fish bone catalyst.
1 more element
Dependencies are inferred from the claim text.