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Method for preparing cyclohexanol and cyclohexanone based on multi-layer guide cylinder bubbling reactor

A technology of bubbling reactors and guide tubes, which is applied in chemical instruments and methods, preparation of carbon-based compounds, preparation of hydroxyl compounds, etc., can solve the problems of increased material consumption and decreased selectivity of target products, and achieve improved efficiency and improved circulation The effect of increasing the rate and improving the mass transfer efficiency

Active Publication Date: 2018-03-09
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Increasing the oxidation conversion rate of cyclohexane can reduce the evaporation of cyclohexane, but increasing the conversion rate will lead to a decrease in the selectivity of the target product, resulting in an increase in material consumption; reducing the oxidation conversion rate of cyclohexane can increase the selectivity of the target product, but the product The proportion of cyclohexane in the medium is higher, and more cyclohexane needs to be evaporated

Method used

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  • Method for preparing cyclohexanol and cyclohexanone based on multi-layer guide cylinder bubbling reactor
  • Method for preparing cyclohexanol and cyclohexanone based on multi-layer guide cylinder bubbling reactor

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Embodiment 1

[0053] see figure 1 , the reactor housing 1 of the cyclohexane oxidation reactor is set with a multi-layer guide tube. The flow tube 2, the two-layer flow guide tube is coaxially arranged with the reactor shell 1, and has different diameters, which divides the reactor shell 1 into three-stage annular areas 4, and the height of the flow guide tube is along the 3 is lowered step by step toward the outer guide tube 2, and the bottoms of the inner guide tube 3 and the outer guide tube 2 are left with a water gap 10 at the bottom of the reactor shell 1, so that the three-stage annular area It can not only flow step by step through the water gap 10 between the guide tube and the bottom of the shell, but also overflow and connect step by step through the top. The inner guide tube 3 in the center is connected to the liquid inlet 5, and each stage is annular Area 3 and the inner layer guide tube 3 in the center are all connected to the air inlet 6, and the liquid inlet 5 and the air i...

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Abstract

The invention discloses a method for preparing cyclohexanol and cyclohexanone based on a multi-layer guide cylinder bubbling reactor. The method comprises the following steps: in a multi-layer guide cylinder bubbling reactor, oxidizing cyclohexane with an oxygen-containing gas to generate a cyclohexyl hydroperoxide-containing oxidation liquid, extracting an oxidation liquid with a strong base solution so as to obtain a cyclohexyl hydroperoxide-containing alkali water phase and a cyclohexane organic phase, performing a decomposition reaction on the cyclohexyl hydroperoxide-containing alkali water phase in the presence of a high-melting point solvent, performing sedimentation separation on a decomposition liquid, distilling the cyclohexane organic phase so as to obtain a mixture of cyclohexanol and cyclohexanone, and feeding back the extracted cyclohexane solution to the cyclohexane oxidation reaction process. By adopting the method, the oxidation selectivity and the reaction efficiencyof the cyclohexane can be greatly improved, and the cyclohexane distillation energy consumption can be reduced.

Description

technical field [0001] The invention relates to a method for preparing cyclohexanol and cyclohexanone, in particular to a method for preparing cyclohexanol and cyclohexanone based on a multilayer draft tube bubbling reactor; it belongs to the technical field of KA oil preparation. Background technique [0002] To prepare cyclohexanol and cyclohexanone, cyclohexane is usually oxidized with a gas containing molecular oxygen. First, a cyclohexane oxidation solution containing cyclohexyl hydroperoxide, cyclohexanol and cyclohexanone is generated, and then cyclohexane is treated Oxidize the liquid, decompose the cyclohexyl hydroperoxide in it to generate cyclohexanol and cyclohexanone, then distill the unreacted cyclohexane for recycling, and the reaction product is obtained through multiple rectifications to obtain cyclohexanol and cyclohexanone. [0003] The cyclohexane oxidation reactor is generally a bubble tower, and internal components such as a draft tube can be added to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C27/00C07C27/26C07C27/34C07C45/53C07C45/78C07C45/80C07C49/403C07C29/00C07C29/74C07C29/86C07C35/08
CPCC07C29/00C07C29/74C07C29/86C07C45/53C07C45/78C07C45/80C07C407/00C07C49/403C07C35/08C07C409/14
Inventor 周小文刘洪武黎树根邓琼韩娟
Owner CHINA PETROLEUM & CHEM CORP
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