Method for preparing 1,2-cyclohexanediol through oxidation of cyclohexene
A technology of cyclohexanediol and cyclohexene, which is applied in the field of cyclohexene oxidation preparation 1, can solve problems such as the complexity of the preparation process, and achieve the effects of environmental friendliness, high conversion rate, and high yield
Active Publication Date: 2015-04-08
昌德新材科技股份有限公司
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Problems solved by technology
[0010] As we all know, TS-1 / H 2 o 2 The oxidation system has a good oxidation effect on olefins, and the selectivity of the target product is high. However, when it is applied to the oxidation of cyclohexene, the main product is epoxy cyclohexane, and in order to prepare 1,2-cyclohexane For diols, it needs to continue to be obtained by hydrolyzing epoxycyclohexane, which undoubtedly makes the whole preparation process more complicated
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Embodiment 1-21
[0051] Weigh a certain mass of titanium-silicon molecular sieve and put it in a 250ml three-neck glass bottle, and then add cyclohexene, hydrogen peroxide, organic solvent and acidic substance 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, the selectivity and yield of cyclohexene oxide are shown in Table 1.
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Abstract
The invention provides a method for preparing 1,2-cyclohexanediol through oxidation of cyclohexene. The method includes the step of enabling cyclohexene, hydrogen peroxide aqueous solution to contact with a titanium silicate molecular sieve catalyst in organic solvent under an oxidizing reaction condition, wherein the contact is carried out on the condition that acidic materials exist. Through adoption of the method, the 1,2-cyclohexanediol can be obtained from direct oxidization of the cyclohexene, the conversion rate of the cyclohexene is high, and the yield coefficient of target products, namely the 1,2-cyclohexanediol, is high. The method is environment-friendly and suitable for industrialized application.
Description
technical field [0001] The invention relates to a method for preparing 1,2-cyclohexanediol by oxidation of cyclohexene. Background technique [0002] 1,2-cyclohexanediol is a white crystal with the molecular formula C 6 h 12 o 2 , with a molecular weight of 116.16, which has cis and trans isomers, namely cis-1,2-cyclohexanediol and trans-1,2-cyclohexanediol. The melting point of cis-1,2-cyclohexanediol is 97-99°C, the melting point of trans-1,2-cyclohexanediol is 102-104.5°C, and the boiling point is 126°C. It can be dissolved in methanol, chloroform, and easily soluble in water. [0003] [0004] trans-1,2-cyclohexanediol cis-1,2-cyclohexanediol [0005] 1,2-Cyclohexanediol has relatively active chemical properties due to two hydroxyl groups and a ring structure in the molecule, and can undergo reactions such as addition, substitution, oxidation, and dehydrogenation. 1,2-Cyclohexanediol is an extremely important organic chemical raw material, mainly used in the man...
Claims
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IPC IPC(8): C07C35/14C07C29/48C07C29/10B01J29/89
Inventor 屈铠甲何嘉勇蒋卫和肖海军林民舒兴田汪燮卿
Owner 昌德新材科技股份有限公司