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Application of a star-shaped compound carrying a dense charge as a flocculant

A compound and flocculant technology, applied in the application field of star compound as flocculant, can solve the problems of large amount of chemical flocculant, secondary pollution, difficult to decompose, etc.

Active Publication Date: 2020-10-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although traditional flocculation can remove most of the suspended solids and colloidal substances, the commonly used chemical flocculants are used in large amounts, which are not easily decomposed and easily cause secondary pollution

Method used

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  • Application of a star-shaped compound carrying a dense charge as a flocculant
  • Application of a star-shaped compound carrying a dense charge as a flocculant
  • Application of a star-shaped compound carrying a dense charge as a flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Be that 20% methylamine aqueous solution (23.25g, wherein contain methylamine 4.65g, 0.15mol) and acidic catalyst (85%H 3 PO 4 , 0.25g), warming up to 40 ° C, dropwise added a mass fraction of 70% trimethylolpropane-three (3- aziridinyl propionate) aqueous solution (35.42g, which contains trimethylolpropane-three (3-Aziridinyl propionate) 21.25 g, 0.05 mol), the dropping time is 40 min. After the dropwise addition, the temperature was raised to 50° C. for 7 h.

[0030] (2) The above reaction solution was mixed with K 2 CO 3 Adjust to weakly alkaline (pH=9~10), add dropwise 3-chloro-2-hydroxypropyl-trimethylammonium chloride aqueous solution (70.50g, containing 3-chloro-2- Hydroxypropyl-trimethylammonium chloride 56.40g, 0.30mol), dropwise time is 60min, and react at 50°C for 8h; after the reaction, remove insoluble matter, concentrate the reaction solution, and purify and isolate the product by toluene column chromatography , vacuum dried to constant weight to ...

Embodiment 2

[0036] (1) It is 70% ethylamine aqueous solution (9.54g, wherein containing ethylamine 6.75g, 0.15mol) and acidic catalyst (85%H 3 PO 4 , 0.25g), warming up to 50 ° C, dropwise added a mass fraction of 70% trimethylolpropane-three (3- aziridinyl propionate) aqueous solution (35.42g, which contains trimethylolpropane-three (3-Aziridinyl propionate) 21.25 g, 0.05 mol), the dropping time is 40 min. After the dropwise addition, the temperature was raised to 70° C. for 5 h.

[0037] (2) The above reaction solution was mixed with K 2 CO 3 Adjust to weakly alkaline (pH=9~10), add dropwise 3-chloro-2-hydroxypropyl-trimethylammonium chloride aqueous solution (70.50g, containing 3-chloro-2- Hydroxypropyl-trimethylammonium chloride 56.40g, 0.30mol), dropwise time is 60min, react at 70°C for 4h; after the reaction, remove the insoluble matter, concentrate the reaction solution, and use toluene column chromatography to purify and isolate the product , vacuum dried to constant weight t...

Embodiment 3

[0049] A preparation method of a cationic star-shaped flocculant with dense charges, comprising the steps of:

[0050] (1) Be that 80% octadecyl primary amine ethanol solution (50.44g, wherein contain octadecyl primary amine 40.35g, 0.15mol) and acidic catalyst (85%H 3 PO 4 , 0.25g), warming up to 50 ° C, dropwise added a mass fraction of 70% trimethylolpropane-three (3- aziridinyl propionate) aqueous solution (35.42g, which contains trimethylolpropane-three (3-Aziridinyl propionate) 21.25 g, 0.05 mol), the dropping time is 40 min. After the dropwise addition was completed, the temperature was raised to 80° C. for 6 h.

[0051] (2) The above reaction solution was mixed with K 2 CO 3 Adjust to weakly alkaline (pH=9~10), add dropwise 3-chloro-2-hydroxypropyl-trimethylammonium chloride aqueous solution (70.50g, containing 3-chloro-2- Hydroxypropyl-trimethylammonium chloride 56.40g, 0.30mol), dropwise time is 60min, react at 70°C for 4h; after the reaction, remove the insolub...

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Abstract

The invention discloses an application of a star type compound with dense charges as a flocculating agent. The cationic star type flocculating agent with dense charges is a novel flocculating agent, can efficiently process oil stains in water, has an obvious flocculating effect, and is an excellent oil stain processing agent.

Description

technical field [0001] The invention relates to the technical field of preparation of polyquaternary ammonium salt cationic surfactants, in particular to the application of a star-shaped compound carrying dense charges as a flocculant. Background technique [0002] Flocculation is a simple, effective and widely used process in the traditional water treatment process. It adds flocculants to the wastewater, changes the surface charge of the colloids in the water, absorbs them, and captures them with a net to make the colloidal particles in the water A method in which substances are separated by coagulation and flocculation to purify wastewater. Commonly used flocculants include inorganic salts such as aluminum sulfate, ferric chloride, etc., and polymer substances such as polyaluminum chloride and polyacrylamide. Although traditional flocculation can remove most of the suspended solids and colloidal substances, the commonly used chemical flocculants are used in large amounts,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/54C02F1/50C07C227/04C07C227/18C07C229/16
CPCC02F1/50C02F1/547C07C227/04C07C227/18C07C229/16
Inventor 王晨王霞辛燕杨晓武费贵强
Owner SHAANXI UNIV OF SCI & TECH
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