Novel sewage treatment agent and preparation method thereof

A sewage treatment agent, a new type of technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of reducing biological resources, strong chemical activity, and improving performance

Active Publication Date: 2009-10-21
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a solvent-based lignin, urea and aldehyde to prepare high-efficiency sewage treatment agent and its preparation method, make full use of renewable biological resource lignin, solve the problem of extracting lignin from papermaking "black liquor" in the prior art The defects caused by sulfonate can reduce the cost of flocculants such as chitosan and polyacrylamide; and the processing technology is simple, easy to implement, and the modification effect is good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]Weigh 5g of high-boiling alcohol lignin from bamboo chips, add it to a 500mL three-neck flask together with 75mL of water, add 2mL of 30% sodium hydroxide solution, adjust the solution to pH=10-12, and then add 11ml of formaldehyde solution (content: 37%), heat up to 80° C., stir and react for 35 minutes, add 8 g of urea, and continue to react for 90 minutes. Add 10% hydrochloric acid to adjust the pH value to 5-6, continue to maintain the temperature, carry out polycondensation for 50 minutes, pour the reactant into a 500mL beaker, add acid to adjust the pH value to 2-3, allow it to settle, suction filter, and dry to obtain 13.5g urea-formaldehyde modified lignin flocculant product.

[0048] Use the above reaction product to carry out dye sewage decolorization and flocculation experiments, take a certain amount of lignin flocculant, dissolve it in a dilute alkali solution (dissolve with 2% sodium hydroxide solution), and pour the lignin flocculant alkali solution into t...

Embodiment 2

[0050] Weigh 10g of corncob enzymatic lignin, add it to a 500mL three-neck flask together with 75mL of water, add 2mL of 30% sodium hydroxide solution in addition, adjust the solution to pH=10~12, then add 11ml of formaldehyde solution ( content 37%), heated up to 80°C, stirred and reacted for 60min, added 7.5g of urea, and continued to react for 1h. Add 10% hydrochloric acid to adjust the pH value to 5-6, continue to maintain the temperature, carry out polycondensation for 40 minutes, add 2 mL of 30% sodium hydroxide solution to adjust the pH value to 8-9, add 1.5 g of urea in the later stage, and react for 35 minutes. Pour the product into a 500mL beaker, add acid to adjust the pH=2 to 3, allow it to settle, filter it with suction, and dry it to obtain 17.6g of the product.

[0051] Take a certain amount of the above-mentioned lignin flocculant product, dissolve it in a dilute alkali solution (dissolve with 2% sodium hydroxide solution), pour the lignin flocculant alkali sol...

Embodiment 3

[0053] Weigh 10g of corn stalk enzymatic lignin, put it into a 500mL three-neck flask together with 75mL of water, add 2mL of 30% sodium hydroxide solution, adjust the solution to pH=10-12, and heat up to 80°C , and then dropwise added 8ml of 30% H 2 o 2 , stirred and reacted for 55min, then added 7ml of 40% acetaldehyde solution, stirred and reacted for 1h, added 7.5g of urea, and continued to react for 1h. Add 10% hydrochloric acid to adjust the pH value to 5-6, continue to maintain the temperature, carry out polycondensation for 40 minutes, add 2 mL of 30% sodium hydroxide solution to adjust the pH value to 8-9, add 0.5 g of urea in the later stage, and react for 35 minutes. Pour the mixture into a 500mL beaker, add 5% acetic acid to adjust the pH to 2-3, allow it to settle, filter it with suction, and dry it to obtain 15.6g of the product.

[0054] Utilize the product of this embodiment to carry out dye waste water decolorization, metal ion-containing waste water to remo...

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PUM

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Abstract

The invention provides a sewage treatment agent prepared by using solvent-based lignin or derivatives thereof. The raw materials are as follows: solvent-based lignin or derivatives thereof, aldehyde, urea, a base catalyst and an acid regulating agent; the preparation comprises the following steps of: mixing the lignin and derivatives and water, adding alkali solution to adjust the pH, adding the aldehyde, heating, reacting, adding the urea with the needed using amount, continuously reacting, also being capable of adding the urea by two times according to the needs, adding acid to adjust the pH, carrying out polycondensation, adding alkali to adjust the pH, adding the post urea, reacting, adding the acid regulating agent to adjust the pH, depositing, extracting and filtering, drying and obtaining the sewage treatment agent product. The invention can utilize the renewable biological resources reasonably, thus not only solving the defects that the existing sewage treatment has high cost and lower efficiency, but also being capable of replacing partial of petrochemical materials; and the sewage treatment agent of urea formaldehyde modified derivatives prepared by using solvent-based lignin is used for treating the sewage containing dye or heavy metal ions and has good using effect.

Description

technical field [0001] The invention belongs to the field of surfactant preparation, and more specifically relates to a sewage treatment agent prepared by using solvent-type lignin and a preparation method thereof. Background technique [0002] Water is the basic condition for human survival, but with the development of economy and the prosperity of manufacturing industry, a large amount of various sewage is produced, which poses a huge threat to the living environment of human beings, especially dye wastewater, industries containing phenol and heavy metal ions Wastewater will cause great harm to human health and must be strictly treated before it can be discharged. Developed countries such as the United States, Europe, and Japan have studied the use of chitosan as a flocculant to purify polluted wastewater. As a flocculant, chitosan has high-efficiency flocculation performance, has no toxic side effects, and can be naturally degraded, which has attracted people's attention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 程贤甦靳艳巧
Owner FUZHOU UNIV
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