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A kind of method for preparing cyclohexanol and cyclohexanone based on multi-layer draft tube bubbling reactor

A technology of bubbling reactor and draft tube, which is applied in chemical instruments and methods, preparation of carbon-based compounds, preparation of hydroxyl compounds, etc., can solve the problems of decreased selectivity of target products, increased material consumption, etc. Efficiency, the effect of improving mass transfer efficiency

Active Publication Date: 2021-02-05
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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  • A kind of method for preparing cyclohexanol and cyclohexanone based on multi-layer draft tube bubbling reactor
  • A kind of method for preparing cyclohexanol and cyclohexanone based on multi-layer draft tube 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 multilayer draft tube bubbling reactor. The method is to oxidize cyclohexane with an oxygen-containing gas in the multilayer draft tube bubbling reactor to generate Containing the oxidized solution of cyclohexyl hydroperoxide, then extracting the oxidized solution with a strong alkali solution to obtain an alkaline aqueous phase containing cyclohexyl hydroperoxide and an organic phase of cyclohexane, the alkaline aqueous phase containing cyclohexyl hydroperoxide at high The decomposition reaction is carried out in the presence of a boiling point solvent. After the decomposition liquid is settled and separated, the organic phase is distilled to obtain a mixture of cyclohexanol and cyclohexanone, and the extracted cyclohexane solution is returned to the cyclohexane oxidation reaction process; this method can greatly improve the cyclohexanol Alkoxylation selectivity and reaction efficiency reduce energy consumption for cyclohexane distillation.

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 Patents(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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