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Natural organic high-molecular flocculant and its preparation method

An organic polymer and flocculant technology, applied in the field of water treatment, can solve the problems of high production cost and high product price, and achieve the effects of structural diversification, good environmental acceptability and low price

Inactive Publication Date: 2007-08-01
盛力
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production cost of starch ether flocculants is relatively high, and the product price is relatively expensive

Method used

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  • Natural organic high-molecular flocculant and its preparation method
  • Natural organic high-molecular flocculant and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Take by weighing 127.2 grams of ammonium chloride and 230.6 milliliters of acetic anhydride and place them in a container, add water to 2.8 liters, seal the container, and stir at room temperature for 30 minutes to obtain a cationic monomer;

[0046] (2) Weigh 284 grams of starch in a container, add 2 liters of water and stir; weigh 7 grams of NaOH and place it in the above suspension, add water to 2.8 liters, heat to 45°C, and stir for 70 minutes to obtain modified starch;

[0047] (3) Add 11.48 g of cerium sulfate to the modified starch and stir for 45 seconds, add the cationic monomer, lower the temperature to 40° C. and stir for 100 minutes to obtain 5 liters of the cationic modified starch flocculant.

[0048] When the flocculant prepared according to the above examples is used to treat backwash wastewater with high mud content, when the dosage is 10 mg / l, the turbidity of the supernatant can reach below 5 NTU, and the volume of residual sludge is less than 5%. ...

Embodiment 2

[0050] (1) Take by weighing 1909 grams of ammonium chloride and 3406 milliliters of acetic anhydride and place them in a container, add water to 56.8 liters, seal the container, and stir at room temperature for 35 minutes to obtain a cationic monomer;

[0051] (2) Weigh 5682 grams of starch in a container, add 50 liters of water and stir; weigh 140 grams of NaOH and place it in the suspension, add water to 56.8 liters, heat to 50°C, and stir for 70 minutes to obtain modified starch;

[0052] (3) Add 229.5 g of cerium sulfate to the modified starch and stir for 60 seconds, add the cationic monomer, lower the temperature to 45° C. and stir for 120 minutes to obtain 100 liters of the cationic modified starch flocculant.

[0053] The flocculant prepared according to the above examples was observed in the flocculation experiment for domestic sewage to produce relatively large alum flowers, and the water quality of the treated sewage was clear. When the dosage is about 10mg / L, the r...

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Abstract

The invention discloses a making method of new-typed natural organic macromolecular flocculant, which comprises the following steps: adopting corn starch as main raw material and cerium sulfate as initiator; using the copolymer of ammonium chloride and acetic anhydride with weight rate at 2: 1-1: 2 as cation monomer modifier to react under 10-45 deg.c for 20-50min; setting the weight rate of corn starch and cation monomer at 10:1-1:1; setting the starch alkalizing temperature at 35-55 deg.c for 50-60 min; making the grafting modifying temperature at 30-60 deg.c for 60-120min.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to a high-efficiency, environment-friendly and green natural organic polymer flocculant applied to a water treatment process system. The international patent classification number is: C02F1 / 56. Background technique [0002] Flocculants are widely used in water treatment processes. The amount of traditional flocculants - simple aluminum salts, iron salt flocculants such as aluminum sulfate, aluminum chloride, alum, ferric chloride, ferric sulfate, etc. is decreasing, and has been gradually replaced by inorganic and organic polymer flocculants. The pollution caused by inorganic flocculants and artificially synthesized organic polymer flocculants in the production, use and subsequent treatment and the potential threat to human health have been paid more and more attention. The development and use of natural organic polymer flocculants are becoming more and more impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
Inventor 盛力隋铭浩马东兵
Owner 盛力
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