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A kind of treatment method of cyclohexanone plant wastewater

A treatment method, cyclohexanone technology, applied in natural water treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of cumbersome operation, high energy consumption and high treatment cost, and achieve economical treatment Cost, simple treatment process, and the effect of water quality clarification

Active Publication Date: 2018-06-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above technical methods, there are some serious technical problems or defects, such as cumbersome operation, high processing cost, etc., especially the two methods of steam stripping and micro-electrolysis have the disadvantage of high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put 10g of 20-mesh granular activated carbon in 800mL of 0.05mol / L copper nitrate solution, immerse the load in a water bath at 40°C for 2h, filter and dry it after completion, and roast it in a vacuum oven at 300°C for 2h to prepare loaded copper ions Activated carbon. Put 10g of adsorbent in the packing layer of the micro-packed tower, and pass 200g of wastewater from a cyclohexanone plant with a COD value of 20,000mg / L at 20°C through the packing layer at a flow rate of 2ml / min. The removal rate is 90%. At 60°C, 800 g of cyclohexane was passed through the packing layer at a flow rate of 4 ml / min, and the adsorbent could be recycled after washing.

Embodiment 2

[0023] Put 20g of 40 mesh granular activated carbon in 500mL of 0.25mol / L nickel nitrate solution, immerse the load in a water bath at 50°C for 2h, filter and dry after completion, and roast in a vacuum oven at 300°C for 2h to prepare loaded nickel ions Activated carbon. Put 20g of adsorbent in the packing layer of the micro-packed tower, and pass 800g of wastewater from a cyclohexanone plant with a COD value of 5000mg / L at 40°C through the packing layer at a flow rate of 4ml / min. The COD value of the treated wastewater is 2000mg / L, and the COD is removed The removal rate is 80%. Under the condition of 60° C., 1100 g of cyclohexane was passed through the packing layer at a flow rate of 4 ml / min, and the adsorbent could be recycled after washing.

Embodiment 3

[0025] Put 10g of 20-mesh granular activated carbon in 500mL of 0.2mol / L copper nitrate solution, immerse the load in a 60°C water bath for 2h, filter and dry after completion, and roast in a vacuum oven at 300°C for 2h to prepare the loaded copper ions Activated carbon. Put 10g of adsorbent in the packing layer of the micro-packed tower, and pass 300g of wastewater from a cyclohexanone plant with a COD value of 10,000mg / L at 40°C through the packing layer at a flow rate of 1.5ml / min. The removal rate is 86%. Under the condition of 100° C., 400 g of cyclohexane was passed through the packing layer at a flow rate of 2 ml / min, and the adsorbent could be recycled after washing.

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Abstract

The invention provides a treatment method for cyclohexanone device waste water through adsorption by means of activated carbon supporting metal. In the method, an activated carbon adsorbent supporting 1-5% by mass of the metal is employed. The treatment method particularly includes the steps of: after the activated carbon adsorbent is prepared, the cyclohexanone device waste water is subjected to adsorption treatment at a low temperature and then is subjected to desorption through a cyclohexane washing adsorbent at a high temperature, wherein the adsorbent after the desorption can be recycled. The treated cyclohexanone device waste water is 80-90% in COD removal ratio after the adsorption treatment, is clear in water quality and is free of obvious odor. The method reduces energy consumption of treating the cyclohexanone device waste water and saves treatment cost.

Description

technical field [0001] The invention is a new process for treating wastewater from a cyclohexanone plant. Background technique [0002] The process of preparing cyclohexanone by air oxidation of cyclohexane is a process commonly used in China at present. With benzene and hydrogen as the main raw materials, it undergoes hydrogenation of benzene, oxidation of cyclohexane, decomposition of peroxide, dehydrogenation of cyclohexanol, and rectification. The product cyclohexanone is obtained. Among them, oxidation reaction, decomposition reaction and vacuum distillation process will produce waste water, and its COD value is 5000-20000mg / L. If this kind of waste water is discharged directly without treatment, the cyclohexanone, cyclohexanol and other substances in it will be easily Accumulated in the environment, they are difficult to degrade naturally, and will be enriched along the food chain to pose a serious hazard to human health. Therefore it is very important to find an eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/20B01J20/30C07C27/26C07C29/76C07C31/135C07C45/79C07C49/403C02F103/36
Inventor 季峰崎金汉强何育苗刘卓
Owner CHINA PETROLEUM & CHEM CORP
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