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A kind of preparation method of high cationic starch flocculant

A cationic degree and flocculant technology, which is applied in the field of flocculant preparation, can solve the problems of difficult degradation of polyacrylamide, uneven heat release, high transportation costs, etc., and achieve the effects of controllable reaction temperature, suppression of overheating, and convenient transportation

Active Publication Date: 2022-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that polyacrylamide is difficult to degrade and has high toxicity when using polyacrylamide grafted starch to improve the flocculation effect in the current preparation method, and at the same time solves the problem of uneven heat release and easy gelation of the existing wet-process synthetic starch flocculant. The problem of low grafting rate and high transportation costs

Method used

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  • A kind of preparation method of high cationic starch flocculant
  • A kind of preparation method of high cationic starch flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 20g cornstarch, 240g absolute ethanol, 0.5g sodium hydroxide aqueous solution with a concentration of 5mol / g were respectively added to the there-necked flask, stirred for 30min at 60°C, and then 30g of tetraethylenepentamine was added to continue stirring at this temperature. 2h. Subsequently, the temperature was raised to 85° C., 20 g of epichlorohydrin was added dropwise, and the reaction was carried out for 3 h. Finally, 25 g of hydrochloric acid with a concentration of 36% was added, and the mixture was stirred at 50° C. for 1 h to obtain flocculant 1. The properties of the flocculant are shown in Table 1.

Embodiment 2

[0032] 30g corn starch, 250g absolute ethanol, 0.5g potassium hydroxide aqueous solution with a concentration of 5mol / g were respectively added to the three-necked flask, stirred at 50°C for 30min, then added 30g triethylenetetramine and continued to stir at 65°C 2h. Subsequently, the temperature was raised to 80° C., 25 g of epichlorohydrin was added dropwise, and the reaction was carried out for 4 h. Finally, 10 g of sulfuric acid with a concentration of 98% was added, and the mixture was stirred at 50° C. for 50 min to obtain flocculant 2. The properties of the flocculant are shown in Table 1.

Embodiment 3

[0034] 25g of wheat starch, 200g of absolute ethanol, and 0.3g of sodium hydroxide aqueous solution with a concentration of 5mol / g were respectively added to the three-necked flask, stirred at 40°C for 15min, and then added 20g of diethylenetriamine and continued at 60°C. Stir for 1 h. Subsequently, the temperature was raised to 88° C., 27 g of epichlorohydrin was added dropwise, and the reaction was carried out for 3 h. Finally, 5 g of glacial acetic acid with a concentration of 99% was added, and the mixture was stirred at 40° C. for 30 minutes to obtain flocculant 3. The properties of the flocculant are shown in Table 1.

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Abstract

The invention discloses a preparation method of a high cationic starch flocculant. The preparation method includes the following contents: (1) mixing starch, anhydrous ethanol and inorganic lye evenly, and then adding linear amine for treatment; (2) ) adding a cross-linking agent to the material obtained in step (1) to carry out the reaction; (3) adding a structure regulator to the material after the reaction in step (2) to obtain the final product. The preparation process of the flocculant does not need to add auxiliary agents such as polyacrylamide, the preparation method is environmentally friendly, the process is simple, the temperature control in the preparation process is easy, and the temperature is not easy to fly.

Description

technical field [0001] The invention belongs to the technical field of chemical products, in particular to a preparation method of a flocculant. Background technique [0002] The flocculation technology is mainly by adding chemicals into the water to be treated, and the nano-scale and micron-scale impurity particles in the wastewater will undergo agglomeration-flocculation reaction to form large floc particles, which are finally removed by precipitation, filtration and other processes. The added agent is called flocculant, and the quality of flocculant is the key to determine the effect of flocculation. [0003] CN 109775832 A discloses a method for manufacturing a flocculant. The flocculant is prepared by the following methods: A. cellulose is washed with water; B. cellulose is immersed in a solution with a pH of 7.5-8, and 1. -2h, rinse with water for 2-3 times; C. Freeze the cellulose after the treatment in step B in a -5~-10 ℃ environment; D. take out the cellulose afte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/00C02F1/56
CPCC08B31/006C02F1/56Y02W10/37
Inventor 赵凯强吴炳乾尹泽群杨超王晨杨国兴赵林
Owner CHINA PETROLEUM & CHEM CORP
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