A kind of method that cyclohexene oxidation prepares epoxy cyclohexane
A technology of epoxy cyclohexane and cyclohexene, which is applied in the direction of organic chemistry, can solve the problems of increasing production costs of precious metals, and achieve high conversion rate, high yield, and environmental friendliness
Active Publication Date: 2015-12-02
昌德新材科技股份有限公司
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CN101544620A discloses a preparation method of epoxycyclohexane, in which cyclohexene, oxygen, hydrogen, diluent gas, solvent and catalyst are mixed and contacted under the condition of 0-180°C and pressure of 0.1-3.0MPa , wherein the catalyst is a noble metal-modified microporous titanium-silicon material, although this method effectively improves the conversion rate of cyclohexene and the yield of the target product epoxy cyclohexane, however, the addition of noble metals undoubtedly increases Cost of production
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Embodiment 1-17
[0043] Weigh a certain mass of titanium-silicon molecular sieves and put them in a 250ml three-neck glass bottle, and then add cyclohexene, hydrogen peroxide, and an organic solvent into the container. Put the three-neck glass bottle in a constant temperature oil bath, and the oil bath is placed on a temperature-controlled magnetic stirrer. Start the magnetic stirring and start the reaction. The types and materials of each substance, the reaction conditions, the conversion rate of cyclohexene and the selectivity of cyclohexene oxide are shown in Table 1.
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Abstract
The invention provides a method for preparing cyclohexene oxide through oxidation of cyclohexene. The method includes the step of enabling cyclohexene, hydrogen peroxide or hydrogen peroxide aqueous solution to contact with a titanium silicate molecular sieve catalyst in organic solvent under an oxidizing reaction condition, wherein the organic solvent comprises a component A and a component B. The component A is ketone and / or nitrile, and the component B is alcohol. Through adoption of the method, the conversion rate of the cyclohexene is high, and the yield coefficient of target products, namely the cyclohexene oxide, is high. Moreover, the method is environment-friendly.
Description
technical field [0001] The invention relates to a method for preparing epoxycyclohexane by oxidation of cyclohexene. Background technique [0002] Epoxycyclohexane is an important fine chemical intermediate, which has broad application prospects in the fields of pesticides, medicines, and materials. [0003] For example, epoxy cyclohexane reacts with p-tert-butylphenol to generate 2-(4-tert-butylphenoxy)cyclohexanol, and 2-(4-tert-butylphenoxy)cyclohexanol reacts with chlorinated The reaction of sulfoxide and propynyl alcohol can synthesize an organosulfur acaricide with high efficiency, low toxicity, broad spectrum, long-lasting effect, and no teratogenic and carcinogenic effects. [0004] As another example, epoxy cyclohexane can also be used as a reactive diluent for epoxy resin in the binder. During the application process, epoxy cyclohexane itself will also generate epoxy groups while the epoxy resin is curing. Ring-opening polymerization, which becomes a component of...
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IPC IPC(8): C07D303/04C07D301/12
Inventor 蒋卫和肖海军屈铠甲林民何嘉勇汪燮卿舒兴田
Owner 昌德新材科技股份有限公司