Method for preparing lignin amine from cyclohexanone wastewater

A technology for cyclohexanone wastewater and wastewater, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Problems, the effect of realizing reuse

Active Publication Date: 2012-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Lignin amines are obtained by amination of lignin and fatty amines under alkaline conditions, such as a patented lignin amine-based polyol and its preparation method (application number: 201010207482.X) and road construction asphalt Warm mixing additives for mixtures and methods of preparation and use (Application No.: 201010129727.1) respectively report a preparation method of lignin amine and its use in road construction. The above-mentioned patents all prepare lignin amine in clear water, but in The preparation of such polymers in chemical wastewater is rarely reported

Method used

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  • Method for preparing lignin amine from cyclohexanone wastewater

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Take 60 g of cyclohexanone wastewater (pH 9, COD 5000 mg / L) in a three-necked flask, add 16 g of alkali lignin, and stir to dissolve. Add 27g of formaldehyde solution with a mass concentration of 37% to the waste water, and stir for 15 minutes to dissolve it. Add 16 g of triethylenetetramine to the above waste water, stir for 10 min to dissolve it; raise the temperature to 85° C., and react for 3 hours to obtain a lignin amine solution. The infrared spectrum of the obtained product is as figure 1 As shown, the structure is consistent with the lignin amine prepared with water as solvent.

Embodiment 2

[0035] Example 2: Take 60 g of cyclohexanone wastewater (pH 11, COD 10000 mg / L) in a three-necked flask, add 12 g of alkali lignin, and stir to dissolve. Add 8g of acetaldehyde to the waste water, stir for 13min to dissolve it. Add 20 g of diethylenetriamine to the above wastewater, stir for 15 minutes to dissolve it; raise the temperature to 75° C., and react for 5 hours to obtain a lignin amine solution. After the reaction, the main pollutant cyclohexanone in the waste water was measured, and its concentration was reduced to less than 10% of that before the reaction, which indicated that the effective components in the waste water could participate in the reaction.

Embodiment 3

[0036] Example 3: Take 60 g of cyclohexanone wastewater (pH 13, COD 50000 mg / L) into a three-necked flask, add 20 g of alkali lignin, and stir to dissolve. Add 27g of formaldehyde solution with a mass concentration of 37% to the waste water, and stir for 15 minutes to dissolve it. Add 25 g of tetraethylenepentamine to the above wastewater, stir for 15 minutes to dissolve it; raise the temperature to 80° C., and react for 2 hours to obtain a lignin amine solution.

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Abstract

The invention discloses a method for processing cyclohexanone wastewater, belonging to the technical field of comprehensive utilization of wastewater, comprising the following steps: weighing 60 weight parts of cyclohexanone wastewater with the pH value of 9-13, adding 10-20 weight parts of alkali lignin, and stirring for 10-15min for dissolving; adding 8-12 weight parts of aldehyde compound to the wastewater, stirring for 10-15min for dissolving; adding 15-25 weight parts of amine compound in the wastewater, stirring for 10-15min for dissolving; heating up to 75-90 DEG C, and reacting for 1-5 h to obtain a solution of high-molecular emulsifier lignin amine. According to the invention, by using the wastewater as a solvent and conducting high-molecular chemical reaction in the solvent to prepare the high-molecular emulsifier, the cost of processing the wastewater can be effectively reduced, the effective components in the wastewater can be fully utilized, thus the recycling of the wastewater is realized, and the method has obvious economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of waste water, in particular to a method for treating cyclohexanone waste water, in particular to a technology for preparing polymer emulsifiers by using polymer chemical reactions in waste water. Background technique [0002] The chemical industry is a traditional pillar industry in my country, and the chemical raw materials and products produced are widely used in various fields. The chemical industry is also a highly polluting industry. The wastewater produced often contains high concentrations of organic pollutants. It is difficult to achieve standard discharge through ordinary wastewater treatment methods such as biochemical treatment and membrane treatment. [0003] Most of the wastewater produced by the cyclohexanone plant is refractory organic pollutants. The wastewater has the characteristics of large water volume, high concentration of organic pollutants, deep color, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C02F9/04B01F17/50C09K23/50
Inventor 李正琪李昕阳程学文万国晖张宾
Owner CHINA PETROLEUM & CHEM CORP
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