Method for separating epoxy cyclohexane and n-amyl alcohol from light-oil of cyclohexanone by-product

A technology of epoxycyclohexane and n-pentanol, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of hydroxyl compounds, etc., can solve problems such as secondary environmental pollution, low product purity, complex process, etc., and achieve operational Convenience, rich sources of raw materials, and simple process

Inactive Publication Date: 2004-10-20
杨政
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Problems solved by technology

Extract epoxycyclohexane and n-amyl alcohol from above-mentioned light oil, can adopt chemical separation method, as Chinese patent CN00113505.8, or adopt azeotropic distillation separation method, as Chinese patent CN94113151. Complicated, low yield, low product purity, especially the chemical separation method, because hydrochloric acid is used as a reactant, it is easy to cause secondary environmental pollution

Method used

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Embodiment Construction

[0009] Take 150 grams of dehydrated light oil and 30 grams of dry urea, mix and stir at room temperature for 2 hours and then filter. The filtrate is rich in epoxycyclohexane. It is rich in n-pentanol; according to the difference in boiling point between epoxycyclohexane and n-pentanol, rectify separately to obtain epoxycyclohexane product and n-pentanol product with a purity of 99.5%, and the recovery rate is 96%.

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Abstract

The method for separating epoxycyclohexane and n-amyl alcohol from cyclohexanone by-product light oil includes: pre-distilling raw material light oil and dewatering, adding urea at normal temp., uniformly stirring them and filtering, and rectifying filtrate to obtain epoxycyclohexane; adding water into filter cake, heating to 50 deg.C, making oil-water separation, its oil phase is crude n-amyl alcohol, and rectifying the crude n-amyl alcohol to obtain high-purity n-amyl alcohol product whose purity is above 99% and its yield rate is greater than 95%. Said urea can be repeatedly used, its production cost is low.

Description

technical field [0001] The invention relates to a method for separating epoxycyclohexane and n-pentanol from cyclohexanone by-product light oil. Background technique [0002] Both epoxycyclohexane and n-pentanol are important chemical raw materials, widely used in the fields of pesticides, plastics, oil synthesis, and fragrance synthesis. extract from. Extract epoxycyclohexane and n-amyl alcohol from above-mentioned light oil, can adopt chemical separation method, as Chinese patent CN00113505.8, or adopt azeotropic distillation separation method, as Chinese patent CN94113151. Complicated, low yield, low product purity, especially the chemical separation method, because hydrochloric acid is used as a reactant, it is easy to cause secondary environmental pollution. Contents of the invention [0003] A method for separating epoxycyclohexane and n-amyl alcohol from cyclohexanone by-product light oil is characterized in that the following process steps are adopted: A) adding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/88C07C31/125C07C311/25C07D303/04C07D313/04
Inventor 杨政赵岚俞祖勋
Owner 杨政
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