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Method for treating waste liquid from production of 2,6-di-t-butyl-p-cresol

A technology of p-cresol and di-tert-butyl, which is applied in the field of treating 2,6-di-tert-butyl-p-cresol production waste liquid, can solve the problems of pollution reduction and pollution, and achieve loss reduction and recovery rate The effect of increasing and reducing costs

Active Publication Date: 2017-06-16
江苏迈达新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of neutralizing waste liquid has a certain effect on reducing pollution, but there is still a certain degree of pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for processing 2,6-di-tert-butyl-p-cresol production waste liquid, the production steps are as follows:

[0027] (1) Pretreatment of wastewater: Put the wastewater into the adsorption device for adsorption, then pretreat the mixed wastewater;

[0028] (2) Concentration and neutralization of waste water: send the pretreated waste liquid into the preheater for preheating to 70°C, then send the waste liquid into the cooler for cooling through the feed pump, and the cooled waste liquid The waste liquid is passed into the steam-water separator for separation, and the separated waste liquid is sent to the three-effect evaporation chamber for reaction, then the mixture is passed into the three-effect heating chamber for heating, and the heated mixture is passed into the second-effect evaporation chamber After evaporating, pass it into the second-effect heating chamber for heating, pass the mixture into the first-effect evaporating chamber for evaporation, and pass the...

Embodiment 2

[0036] A method for processing 2,6-di-tert-butyl-p-cresol production waste liquid, the production steps are as follows:

[0037] (1) Pretreatment of wastewater: Put the wastewater into the adsorption device for adsorption, then pretreat the mixed wastewater;

[0038] (2) Concentration and neutralization of wastewater: send the pretreated waste liquid into the preheater for preheating to 80°C, then send the waste liquid into the cooler for cooling through the feed pump, and the cooled waste liquid The waste liquid is passed into the steam-water separator for separation, and the separated waste liquid is sent to the three-effect evaporation chamber for reaction, then the mixture is passed into the three-effect heating chamber for heating, and the heated mixture is passed into the second-effect evaporation chamber After evaporating, pass it into the second-effect heating chamber for heating, pass the mixture into the first-effect evaporating chamber for evaporation, and pass the ...

Embodiment 3

[0046] A method for processing 2,6-di-tert-butyl-p-cresol production waste liquid, the production steps are as follows:

[0047] (1) Pretreatment of wastewater: Put the wastewater into the adsorption device for adsorption, then pretreat the mixed wastewater;

[0048] (2) Concentration and neutralization of waste water: send the pretreated waste liquid into the preheater for preheating to 75°C, then send the waste liquid into the cooler for cooling through the feed pump, and the cooled waste liquid The waste liquid is passed into the steam-water separator for separation, and the separated waste liquid is sent to the three-effect evaporation chamber for reaction, then the mixture is passed into the three-effect heating chamber for heating, and the heated mixture is passed into the second-effect evaporation chamber After evaporating, pass it into the second-effect heating chamber for heating, pass the mixture into the first-effect evaporating chamber for evaporation, and pass the...

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PUM

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Abstract

The invention relates to a method for treating waste liquid from production of 2,6-di-t-butyl-p-cresol. The method comprises the following steps: (1) pretreatment of waste liquid; (2) concentration and neutralization of the waste liquid: preheating the waste liquid to 70 to 80 DEG C, then cooling and separating the waste liquid, delivering the separated waste liquid to a third-effect evaporation chamber and a third-effect heating chamber for heating, then introducing a heated mixture to a second-effect evaporation chamber and a second-effect heating chamber for heating, and then introducing a mixture to a first-effect evaporation chamber and a first-effect heater for heating; and (3) recovery of sodium p-toluenesulfonate: subjecting the mixture obtained in the previous step to filtering and separating, allowing a separated mixture to successively pass through an aggregate vortex chamber and a cyclone separator for separating and dedusting, and then carrying out discharging. According to the invention, heat produced in treatment of the waste liquid can be used as heat energy for production; condensed water can be repeatedly used; treatment cost for the waste liquid is effectively lowered; sodium p-toluenesulfonate can be recycled as a product for reuse; and conventional waste water problems are overcome, and green production is realized.

Description

technical field [0001] The invention relates to a method for treating 2,6-di-tert-butyl-p-methylphenol production waste liquid, belonging to the field of waste water treatment. Background technique [0002] 2,6-di-tert-butyl-p-cresol is a common phenolic antioxidant, widely used in food processing, feed additives, petroleum products, plastics and rubber, etc. phenolic antioxidants. P-toluenesulfonic acid is a strong organic acid, which is often used as a catalyst for esterification reaction, condensation reaction, alkylation reaction and other reactions in the process of organic synthesis. [0003] The domestic production of 2,6-di-tert-butyl-p-cresol generally uses p-cresol and isobutylene as raw materials, and reacts under the catalysis of p-toluenesulfonic acid. In order to eliminate the impact of acidity on the final product, it is often necessary to use sodium hydroxide for neutralization and water washing, so a large amount of neutralization wastewater will be genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C07C303/44C07C309/30
CPCC02F1/001C02F1/04C02F1/28C02F1/38C02F1/40C02F1/66C02F9/00C02F2001/007C07C303/44C07C309/30
Inventor 陈福新陈荣田媛媛
Owner 江苏迈达新材料股份有限公司
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