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Homogeneous preparation method of cationic flocculant from bacterial cellulose

A cationic flocculant and bacterial cellulose technology, applied in the field of wastewater treatment, can solve the problems of refractory degradation, high price, environmental impact of waste, etc., and achieve the effects of improving reactivity, improving accessibility, and being easy to recycle and reuse.

Active Publication Date: 2015-08-05
盱眙凹土能源环保材料研发中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic flocculants have many advantages such as small dosage and strong flocculation ability, but their disadvantages are that they are more expensive, difficult to degrade, greatly affected by fluctuations in oil prices, and waste will have an impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Dissolve 1g bacterial cellulose in 60 g of mass concentration 5% ethylenediamine solution, treat at room temperature for 30 min, then wash, filter, and dry to obtain activated bacterial cellulose; add the obtained activated bacterial cellulose to Put it into a mixed solution composed of 8 g dimethylacetamide and 2 g lithium chloride, react at 95°C for 24 hours, then cool, wash with water, and dry to obtain regenerated bacterial cellulose; add the regenerated bacterial cellulose to -5°C for pre-cooling 7wt% sodium hydroxide and 12wt% urea mixed solution (100 g), stir evenly, freeze at -20°C for 1 h, take it out, and stir at room temperature at high speed to obtain a uniform and transparent bacterial cellulose solution; the bacterial cellulose Under the action of mechanical stirring, the solution was fed with nitrogen gas for 30 minutes, then 6 g of 3-chloro-2 hydroxypropyltrimethylammonium chloride was added at 25 °C for etherification reaction, and the reac...

Embodiment 2

[0020] Embodiment 2: 20 g bacterial cellulose is dissolved in 100 g mass concentration 15% propylene diamine solution, room temperature process 120 min, then wash with, filter, dry, obtain activated bacterial cellulose; The activated bacterial cellulose obtained Add it to a mixed solution composed of 475 g dimethylacetamide and 5 g lithium chloride, react at 120°C for 2 h, then cool, wash with water, and dry to obtain regenerated bacterial cellulose; add the regenerated bacterial cellulose to 5°C for pre- Stir evenly in a cold 7wt% sodium hydroxide and 12wt% urea mixed solution (400 g), freeze at -20°C for 24 h, take it out, and stir at room temperature at high speed to obtain a uniform and transparent bacterial cellulose solution; the bacterial cellulose Under the action of mechanical stirring, nitrogen gas was introduced into the solution for 30 minutes, and then 120 g of glycidyltrimethylammonium chloride was added at 70°C for etherification reaction. After 24 hours of react...

Embodiment 3

[0021] Embodiment 3: Dissolve 10 g bacterial cellulose in 100 g mass concentration 10% dimethylamine solution, treat at room temperature for 60 min, then wash, filter, and dry to obtain activated bacterial cellulose; the activated bacterial cellulose obtained Add it to a mixed solution composed of 225 g dimethylacetamide and 25 g lithium chloride, react at 110°C for 12 h, then cool, wash with water, and dry to obtain regenerated bacterial cellulose; then add the regenerated bacterial cellulose to 0°C In the pre-cooled 7wt% sodium hydroxide and 12wt% urea mixed solution (200 g), stir evenly, freeze at -20°C for 12 h, take it out, place it at room temperature and stir at high speed to obtain a uniform and transparent bacterial cellulose solution; Under the action of mechanical stirring, the cellulose solution was fed with nitrogen gas for 30 minutes, and then 115 g of dimethyldiallyl ammonium chloride was added at 60°C for etherification reaction. After 12 hours of reaction, a un...

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Abstract

The invention discloses a homogeneous preparation method of a cationic flocculant from bacterial cellulose, which comprises the following steps: bacterial cellulose regeneration, regenerated cellulose dissolution, and etherification-modified homogeneous preparation of the cationic flocculant. The cationic flocculant belongs to a natural high polymer flocculant, is degradable under natural conditions, and lowers the dependence of the traditional high polymers on fossil resources. The turbidity removal rate for kaolin simulated sewage is greater than 75%, and the delivery quantity is at most 0.05%. The cationic flocculant is convenient for storage and transportation, is widely used in the fields of papermaking, urban oilfield sewage treatment and the like, and has important environmental and social benefits.

Description

technical field [0001] The invention relates to a water-phase flocculant, in particular to a method for preparing a cationic flocculant from bacterial cellulose in a homogeneous phase, and belongs to the technical field of wastewater treatment. Background technique [0002] In wastewater treatment technology, flocculation and sedimentation method is one of the simplest and most convenient methods. Commonly used flocculants mainly include inorganic flocculants and organic flocculants. Inorganic flocculants have problems such as large dosage and corrosion of equipment. Organic flocculants have many advantages such as small dosage and strong flocculation ability, but their disadvantages are that they are expensive, difficult to degrade, greatly affected by fluctuations in oil prices, and waste will have an impact on the environment. Natural polymer flocculant is a kind of flocculant synthesized by using natural raw materials such as cellulose. It has rich sources of raw mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/14C02F1/56
Inventor 陈新德张海荣郭海军彭芬王璨熊莲黄超陈雪芳杨丹
Owner 盱眙凹土能源环保材料研发中心
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