Method for preparing epoxy compound by oxidating olefin or cycloolefine through bionic catalysis oxygen

Abstract

This invention relates to a method for preparing epoxide from olefin or cycloolefin by biomimetic catalytic oxygen oxidation. The method uses mononuclear metalloporphyrin or mu-O-binuclear metalloporphyrin as the catalyst, which has similar structure to bioenzyme. The concentration of the catalyst is 0.1-100 ppm. Besides, methane dichloride, benzene, toluene, methanol or ethyl acetate is used as the solvent. And isobutylaldehyde or n-butyraldehyde is also added at a mol ratio of 1 : (0.1-2) to the reactant. The reaction is performed at 40-160 deg.C in 0.1-2.0 MPa oxygen atmosphere for 5-12 h. The method has such advantages as low catalyst amount, low reaction temperature and pressure and easy operation. The catalyst has good catalytic performance on olefin or cycloolefin oxidation to obtain epoxide.

Description

technical field [0001] The invention relates to a method for preparing olefin epoxy compounds, in particular to a method for preparing epoxy compounds by biomimetic catalytic oxygen oxidation of olefin or cycloolefin. Background technique [0002] At present, the epoxidation of olefins, such as the epoxidation of ethylene, can be realized in the next step under gas-phase reaction conditions under the condition of noble metals such as gold or silver as catalysts. This method has certain advantages, but the olefins that can be epoxidized by this method are very limited, and the reaction conditions are very harsh, and the catalyst is expensive. Metalloporphyrin compounds are effective mimics of cytochrome P-450 monooxygenases, which have a good activation ability for oxygen. [0003] Chinese patent CN1544404A discloses a method of using a metalloporphyrin compound or a mixture of a metalloporphyrin and a transition metal salt as a catalyst, and using a chemical oxidant or pure...

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Problems solved by technology

[0003] Chinese patent CN1544404A discloses a method of using a metalloporphyrin compound or a mixture of a metalloporphyrin and a transition metal salt as a catalyst, and using a chemical oxidant or pure oxygen or air as an oxidant to catalyze the oxidation of olefins to prepare enols, enones, and epoxides. The shortcoming of this method is that the conversion rate of raw material is relatively low, and the highest conversion rate is 50.3%, and the selectivity of epoxide in the product is not high, also used the metal salt catalyst of the chemical oxidant of metering and polluting environment simultaneously

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