Sewage treatment device for synthesis reaction of phenol and acetone

A sewage treatment device and synthesis reaction technology, which is applied in the direction of neutralization water/sewage treatment, heating water/sewage treatment, extraction water/sewage treatment, etc. It can solve the problems of removal rate less than 98%, difficult separation, high content, etc. problems, to achieve the effect of convenient separation and purification, high recovery rate and cost reduction

Inactive Publication Date: 2019-09-13
实友化工(扬州)有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problems still exist in the existing device and method for the sewage treatment of phenol-acetone synthesis reaction: 1, raw material phenol and acetone have good water solubility, can be miscible with water in almost any ratio, and are difficult to separate; hydroxyketone, formaldehyde , methanol, cumene and other components are dissolved in organic solvents; the content of sodium s

Method used

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  • Sewage treatment device for synthesis reaction of phenol and acetone
  • Sewage treatment device for synthesis reaction of phenol and acetone

Examples

Experimental program
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Effect test

Embodiment 1

[0039] refer to Figure 1-2 As shown, this embodiment provides a sewage treatment device for the synthetic reaction of phenol and acetone, including a first neutralization tank 1, a first water circulation chamber 2, an oil-water separator 4, a circulating lye tower 8, and a rectification tower 10 , the second neutralization tank 11, the falling film evaporator 14.

[0040] Wherein, the first neutralization tank 1 is filled with NaOH solution, which is used to neutralize the sewage produced in the process of synthesizing phenol acetone by the cumene method; the bottom of the first neutralization tank 1 passes through the first water circulation chamber 2 Pipeline connection, the side wall of the first neutralization kettle 1 is connected with a pipette pump 3 through a pipeline, and the first water circulation chamber 2 is connected with the oil-water separator 4 through a pipette pump 3 . The first water circulation chamber 2 is used to circulate, heat and stir the solid pha...

Embodiment 2

[0047] refer to Figure 1-2 As shown, the present embodiment provides a sewage treatment method suitable for the synthetic reaction of phenol and acetone, which specifically includes the following steps:

[0048] S1, the sewage produced in the process of synthesizing phenol-acetone by cumene method is passed into the first neutralization kettle 1 filled with NaOH solution together for neutralization reaction, and distilled for 40-50min at 100-105°C, so that the neutralization reaction occurs The solid-phase precipitate is passed into the first water circulation chamber 2 after being released from the bottom of the kettle, and the liquid phase part after distillation and condensation is sucked into the oil-water separator 4 using the pipetting pump 3; wherein, the content of each main component in the sewage is as follows: acetone 80- 110mg / L, Hydroxyketone 320-360mg / L, Phenol 6-15mg / L, Formaldehyde 15-18mg / L, Methanol 16-20mg / L, Cumene 5-10mg / L, Sodium Sulfate 3200-3800mg / L; ...

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Abstract

The invention discloses a sewage treatment device for a synthesis reaction of phenol and acetone. The device is formed through assembly connection of a neutralization kettle, an oil-water separator, asettling tank, a falling-film evaporator, a rectification tower, evaporation crystallization chambers and other equipment through pipelines. Wastewater produced by the rectification tower mainly comprises low-boiling organic matter and a sodium sulfate salt, multi-effect operation is carried out after the wastewater is introduced into the falling-film evaporator so as to achieve sufficient gas-liquid separation, and after the high-boiling sodium sulfate aqueous solution is introduced into a second evaporation crystallization chamber, centrifugal separation and washing are performed on the high-boiling sodium sulfate aqueous solution and sodium sulfate crystal produced in a first evaporation crystallization chamber so as to complete high-purity extraction of sodium sulfate, wherein the recovery rate is high, direct recycling utilization is performed, and the sewage treatment cost is reduced greatly; and the phenol removal rate reaches 99.5% or above after the sewage is treated, the removal rate of acetone, methanol and CODcr reaches 98.5-99.6%, the extraction rate of sodium sulfate reaches 92% or above, and the purity is larger than 95%.

Description

technical field [0001] The invention relates to the field of chemical wastewater treatment equipment, in particular to a sewage treatment device used for the synthetic reaction of phenol and acetone. Background technique [0002] Phenol, commonly known as carbolic acid, is a colorless acicular or white massive crystal with aromatic odor, and is an important raw material for the production of dyes, pharmaceutical intermediates, explosives, plastics and other products. Acetone is an important organic solvent, but also a raw material for surfactants, medicines, plexiglass, and epoxy resins. Common production methods for phenol and acetone include cumene method, toluene-benzoic acid method, oxidation method, etc. At present, more than 90% of phenol in the world is produced by the cumene method, mainly through four main processes of alkylation reaction of benzene and propylene, oxidation, hydrolysis and concentration. [0003] A certain amount of high-concentration organic wast...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D5/18C01D5/00C02F101/34
CPCC01D5/00C01D5/18C01P2006/80C02F1/04C02F1/26C02F1/40C02F1/66C02F9/00C02F2001/007C02F2101/345
Inventor 郑永耀
Owner 实友化工(扬州)有限公司
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