Preparation method of peroxide metal acidic ionic liquid catalyst and regeneration application of peroxide metal acidic ionic liquid catalyst in olefin epoxidation reaction

The invention discloses preparation of an ionic liquid catalyst and regeneration application of the ionic liquid catalyst in olefin epoxidation reaction. The preparation method comprises the following steps: carrying out high-temperature melting roasting on a metal oxide and potassium hydroxide in a molar ratio of 1: (8-12) for 4-8 hours at the temperature of 400-600 DEG C, adding water for dissolving and filtering, adding acetic acid to adjust the pH value to weak acidity, and carrying out suction filtration and drying to obtain a hydrated oxide; a hydrated oxide and a cation precursor are dispersed in water, hydrogen peroxide is added for stirring and mixing, organic carboxylic acid is added for coordination, the molar ratio of the hydrated oxide to the cation precursor to the organic carboxylic acid is 1: 1: 0.5, the molar ratio of the hydrogen peroxide to the hydrated oxide is (10-12): 1, and the ionic liquid catalyst is obtained through evaporation to dryness. The inactivated catalyst ...