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Improved method for producing phenol/acetone

A technology of acetone and phenol, which is applied in the field of phenol/acetone production, can solve problems such as overheating, achieve the effects of avoiding local overheating, efficient heat transfer, and ensuring decomposition stability

Pending Publication Date: 2022-06-24
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a kind of method of producing phenol / acetone, by optimizing preparation technology, omit concentration process, guarantee the decomposition stability of cumene hydroperoxide (CHP) simultaneously, solve the problem of local overheating in the reaction process, Improving the Safety of Phenol / Acetone Preparation

Method used

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Effect test

Embodiment 1

[0030] At a reaction temperature of 100 ° C, the addition of cumene hydrogen peroxide (CHP) initiator was 5%, and under the condition of vigorous stirring, oxygen was continuously fed into the 1000 mL cumene reaction solution, and the oxygen flow rate was 80 mL / min, After 8 hours of reaction, a cumene oxidation reaction solution with cumene hydrogen peroxide (CHP) concentration of 24.6%, cumene concentration of 71.5% and dimethylbenzyl alcohol (DMPC) content of 2.5% was obtained.

[0031] Take the cumene oxidation reaction solution obtained as raw material, realize the full mixing of raw material and acid solution in micro-mixer, the mass concentration of the acetone solution of sulfuric acid is 2%, and control flow makes sulfuric acid consumption be cumene hydrogen peroxide ( CHP) of 2.0‰. The mixed raw materials enter into a tubular reactor for reaction. The inner diameter of the tubular reactor is 26 mm and filled with Pall rings; the reaction temperature is 110 °C, and the...

Embodiment 2

[0034] At a reaction temperature of 100 ° C, the addition of cumene hydrogen peroxide (CHP) initiator was 5%, and under the condition of vigorous stirring, oxygen was continuously fed into the 1000 mL cumene reaction solution, and the oxygen flow rate was 80 mL / min, After 5 hours of reaction, a cumene oxidation reaction solution with cumene hydrogen peroxide (CHP) concentration of 19.5%, cumene concentration of 77.6% and dimethylbenzyl alcohol (DMPC) content of 2.0% was obtained.

[0035] Take the cumene oxidation reaction solution obtained as raw material, realize the full mixing of raw material and acid solution in micro-mixer, the mass concentration of the acetone solution of sulfuric acid is 2%, and control flow makes sulfuric acid consumption be cumene hydrogen peroxide ( CHP) of 2.0‰. The mixed raw materials enter into a tubular reactor for reaction. The inner diameter of the tubular reactor is 26 mm and filled with Pall rings; the reaction temperature is 140 °C, and the...

Embodiment 3

[0038] At a reaction temperature of 100 ° C, the addition of cumene hydrogen peroxide (CHP) initiator was 8%, and under the condition of vigorous stirring, oxygen was continuously fed into the 1000 mL cumene reaction solution, and the oxygen flow rate was 80 mL / min, After 6 hours of reaction, a cumene oxidation reaction solution with cumene hydrogen peroxide (CHP) concentration of 32.8%, cumene concentration of 60.3% and dimethylbenzyl alcohol (DMPC) content of 3.3% was obtained.

[0039] Taking the obtained cumene oxidation reaction liquid as the raw material, the raw material and the acid solution are fully mixed in the micro-mixer, the mass concentration of the acetone solution of methanesulfonic acid is 1%, and the flow rate is controlled so that the amount of methanesulfonic acid is over 1%. 5.0‰ of cumene hydrogen oxide (CHP). The mixed raw materials enter into a tubular reactor for reaction. The inner diameter of the tubular reactor is 26 mm and filled with Pall rings; ...

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Abstract

The invention relates to an improved method for producing phenol / acetone, which comprises the following operation steps of: (1) oxidizing cumene under the condition of taking oxygen or air as an oxidant to generate cumene hydroperoxide (CHP), so as to obtain cumene oxidation reaction liquid; and (2) not concentrating the cumene oxidation reaction liquid, synchronously introducing the cumene oxidation reaction liquid and an acid solution into a mixer for mixing, and then carrying out a decomposition reaction of cumene hydroperoxide (CHP) in a tubular continuous flow reactor. Efficient mixing of a reaction system is achieved through the micro-mixer, efficient heat transfer and stability of the mixing system are achieved through the tubular reactor filled with the component, local overheating is avoided, the decomposition stability of cumyl hydroperoxide (CHP) is guaranteed, and the safety of phenol / acetone preparation is improved. The cumene hydroperoxide (CHP) decomposition reaction is directly carried out by taking the cumene oxidation liquid as a raw material, and the equipment investment cost and the energy consumption are reduced.

Description

technical field [0001] The invention relates to a production method of phenol / acetone, in particular to an improved method for preparing phenol / acetone by using cumene as a raw material, through cumene oxidation and cumene hydrogen peroxide (CHP) decomposition. Background technique [0002] Phenol is a widely used organic chemical raw material, and its main preparation method is the cumene method. The reaction scheme of adopting the cumene method to produce phenol is shown in formula 1, and benzene and propylene are first alkylated to generate cumene; cumene is oxidized in the liquid phase to generate cumene hydrogen peroxide (CHP). The selectivity of cumene hydrogen peroxide (CHP), the conversion rate of cumene needs to be kept at a low level, and the mass concentration of cumene hydrogen peroxide (CHP) after the reaction is about 24%; Propylbenzene (CHP) is concentrated to obtain cumene hydrogen peroxide (CHP) solution with a concentration of about 80% through the concent...

Claims

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Application Information

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IPC IPC(8): C07C37/08C07C39/04C07C45/53C07C49/08C07C407/00C07C409/10
CPCC07C37/08C07C45/53C07C407/00C07C39/04C07C49/08C07C409/10
Inventor 陈群朱圆圆钱俊峰何明阳周维友孙中华
Owner CHANGZHOU UNIV
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