A kind of flocculant and its preparation method and application

A technology of flocculant and crosslinking agent, applied in the field of flocculant and its preparation, can solve the problems of complicated operation steps, unfavorable industrialization, etc., and achieve the effects of improving flocculation efficiency, increasing cationic charge, and improving shear resistance.

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the operation steps of this patent are relatively cumbersome and complicated, which is not conducive to industrialization

Method used

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  • A kind of flocculant and its preparation method and application
  • A kind of flocculant and its preparation method and application
  • A kind of flocculant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Firstly, 20g of potato starch and 200g of deionized water were respectively weighed into a three-necked bottle with a stirrer, protected by nitrogen gas, and gelatinized for 40min under a constant temperature water bath at 90°C to obtain gelatinized starch.

[0060] Take 10g of N-methyldiallyl propanesulfonate into a beaker, add 70g of deionized water, add sodium hydroxide to adjust the pH to 8, and magnetically stir in the beaker for 1h to obtain N-methyldiallyl Aqueous solution of propanesulfonic acid salt.

[0061] Cool the gelatinized starch in the three-necked flask to 50°C, add 0.45 g of potassium persulfate and stir for 30 minutes, then add the prepared N-methyl diallyl propane sulfonate aqueous solution, and continue stirring for 4 hours to obtain graft copolymerization. Modified starch solution.

[0062] At the same time, 10.3 g of diethylenetriamine and 8.8 g of ethylene oxide were sequentially added to a round-bottomed flask with a stirrer, and reacted for 1...

Embodiment 2

[0066] First, 10g of corn starch and 150g of deionized water were respectively weighed into a three-necked flask with a stirrer, protected by nitrogen gas, and gelatinized for 30min under a constant temperature water bath at 90°C to obtain gelatinized starch.

[0067] Take 10g of N-methyldiallyl propanesulfonate into a beaker, add 50g of deionized water, add potassium hydroxide to adjust the pH to 8, and magnetically stir in the beaker for 30min to obtain N-methyldiallyl Aqueous solution of propanesulfonic acid salt.

[0068] Cool the gelatinized starch in the three-necked flask to 50°C, add 0.15 g of potassium persulfate and stir for 5 minutes, then add the prepared N-methyl diallyl propane sulfonate aqueous solution, and continue stirring for 4 hours to obtain graft copolymerization. Modified starch solution.

[0069] At the same time, 6 g of ethylenediamine and 11.6 g of propylene oxide were sequentially added to a round-bottomed flask with a stirrer, reacted for 1 h under...

Embodiment 3

[0073] Firstly, 30g of cornstarch and 150g of deionized water were respectively weighed into a three-necked flask with a stirrer, protected by nitrogen gas, and gelatinized for 50min under a constant temperature water bath at 95°C to obtain gelatinized starch.

[0074] Take 10g of N-methyldiallyl butanesulfonate into a beaker, add 50g of deionized water, add sodium hydroxide to adjust the pH to 9, and magnetically stir in the beaker for 30min to obtain N-methyldiallyl butanesulfonate aqueous solution.

[0075] Cool the gelatinized starch in the three-necked flask to 60°C, add 0.3 g of potassium persulfate, and stir for 15 minutes, then add the prepared N-methyldiallyl butanesulfonate aqueous solution, and continue stirring for 5 hours to obtain graft copolymerization. Modified starch solution.

[0076] At the same time, 10 g of triethylenetetramine and 12 g of propylene oxide were added to a round-bottomed flask with a stirrer in turn, and the reaction was carried out under t...

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Abstract

The invention discloses a flocculant, a preparation method and application thereof. The flocculant comprises a starch structural unit, a zwitterionic monomer structural unit, a polyether structural unit and a cross-linking agent structural unit. In the preparation method, the amphoteric ion graft copolymerization modified starch, polyether and water are mixed, and the cross-linking agent is added dropwise to carry out cross-linking reaction after mixing evenly; . The modified starch flocculant prepared by the invention has the advantages of fast flocculation effect, low biological toxicity, low cost and the like, and the removal rate of COD, turbidity and suspended solids can reach more than 90% at a low usage amount.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and particularly relates to a flocculant and a preparation method and application thereof. Background technique [0002] Flocculation is a common water purification method, which is involved in sewage treatment in many industries, such as petrochemical, papermaking, hydrometallurgy, steel, textile, printing and dyeing, brewing, food, etc. The core of flocculation treatment technology is flocculant. The main function of flocculants is to agglomerate colloidal particles in sewage through charge neutralization and adsorption bridging, and then remove them through gravity sedimentation and filtration. Flocculants are mainly divided into three categories: inorganic flocculants, organic flocculants and biological flocculants. The cost of inorganic flocculants is low, but there are problems such as large amount of use and low efficiency; the characteristics of organic flocculants represented...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C08J3/24C08L51/02C08L71/02
CPCC02F1/56C08J3/24C08J2351/02C08J2471/02C08J2371/02C08J2451/02Y02W10/10
Inventor 赵凯强杨超韩照明杨国兴王晨周成华
Owner CHINA PETROLEUM & CHEM CORP
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