Preparation method of composite flocculant and sewage treatment method

A composite flocculant and sewage technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of difficult promotion and use, high price, etc., and achieve good flocculation effect , Simple equipment, fast flocculation effect

Pending Publication Date: 2020-01-24
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic polymer flocculants have the advantages of less dosage, fast flocculation speed, and little influence on pH and temperature, but they are expensive and difficult to popularize and use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of composite flocculant and sewage treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 3.00g of chitosan with 95% deacetylation and molecular weight of 5.0*104 and put it in a three-necked flask, add 12ml of 10wt% NaOH aqueous solution and 200ml of isoglycol, heat to 80-90°C under stirring, and start to add 20ml of mass 3-bromo-2-hydroxypropylammonium chloride aqueous solution with a fraction of 30%, stirring and controlling the dropping rate so that the temperature of the material is not higher than 100°C, and the material is discharged after a constant temperature reaction for 3 hours, and the mass fraction of the slurry is 10%. After adjusting the pH to 7.0 with hydrochloric acid, filter with suction, soak and wash the filter residue with 150ml of n-butanol and filter with suction twice, then soak and wash with 150ml of anhydrous methanol and filter with suction twice, and dry at 95°C to constant weight to obtain Chitosan quaternary ammonium salt.

[0022] Dissolve 2.5 g of the obtained modified chitosan quaternary ammonium salt in a beaker with 3...

Embodiment 2

[0024] Take 3.00g of chitosan with 95% deacetylation and molecular weight of 5.0*104 and put it in a three-necked flask, add 12ml of 10wt% NaOH aqueous solution and 200ml of isoglycol, heat to 80-90°C under stirring, and start to add 20ml of mass 3-bromo-2-hydroxypropylammonium chloride aqueous solution with a fraction of 30%, stirring and controlling the dropping rate so that the temperature of the material is not higher than 100°C, and the material is discharged after a constant temperature reaction for 3 hours, and the mass fraction of the slurry is 10%. After adjusting the pH to 7.0 with hydrochloric acid, filter with suction, soak and wash the filter residue with 150ml of n-butanol and filter with suction twice, then soak and wash with 150ml of anhydrous methanol and filter with suction twice, and dry at 95°C to constant weight to obtain Chitosan quaternary ammonium salt.

[0025] Dissolve 1.0 g of the prepared modified chitosan quaternary ammonium salt in a beaker with 3...

Embodiment 3

[0027] Take 3.00g of chitosan with 95% deacetylation and molecular weight of 5.0*104 and put it in a three-necked flask, add 10ml of 12wt% RbOH aqueous solution and 200ml of isoglycol, heat to 80-90°C under stirring, and start to add 15ml of 30% 3-bromo-2-hydroxypropyl ammonium chloride aqueous solution, stirring and controlling the addition rate, so that the temperature of the material is not higher than 100 ° C, and the material is discharged after 2.5 hours of constant temperature reaction, and the mass fraction of the slurry is 12% Sulfuric acid is adjusted to PH to 7.5 After suction filtration, the filter residue was soaked and washed with 150ml of n-butanol and suction-filtered twice, then soaked and washed with 150ml of absolute ethanol and suction-filtered twice, and dried at 90°C to constant weight to prepare chitosan quaternary ammonium Salt.

[0028] Dissolve 2.0 g of the prepared modified chitosan quaternary ammonium salt in a beaker with 300 mL of distilled water,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the field of water treatment, and in particular discloses a preparation method of a composite flocculant and a sewage treatment method. The preparation method of the compositeflocculant comprises the following steps: modifying chitosan by an etherifying agent 3-bromo-2-hydroxypropylammonium chloride, and compounding the modified chitosan quaternary ammonium salt with polyaluminum chloride. Compared with the prior art, the preparation method has the advantages that the prepared modified chitosan quaternary ammonium salt composite flocculant has the advantages that theraw materials are cheap and easily available, cost is low, preparation equipment is simple, and the preparation method is simpler. The invention also discloses a flocculation treatment method for distillery sewage by applying the modified chitosan quaternary ammonium salt composite flocculant. The flocculation speed is fast, the flocculation effect is obvious, and the treatment effect is obviouslyimproved. Therefore, the flocculation treatment method can be widely used in various wastewater treatment.

Description

technical field [0001] The disclosure relates to the field of sewage treatment, in particular to a preparation method of a composite flocculant and a sewage treatment method. Background technique [0002] Water shortage and pollution are relatively serious social problems today. In order to meet the needs of production and life, sewage is usually treated and reused. The most commonly used sewage treatment method is the flocculation-sedimentation method. The pollutants in the water pollution are flocculated and precipitated by the flocculant, so as to achieve the purpose of purifying the water. Currently commonly used flocculants include inorganic polymer flocculants and organic polymer flocculants. Inorganic polymer flocculants are superior to traditional low molecular flocculants such as aluminum salts and iron salts in terms of flocculation effect, but compared with organic polymer flocculants, they are inferior in terms of polymerization degree and corresponding floccula...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F1/52C08B37/08
CPCC02F1/5245C02F1/5263C08B37/003
Inventor 任蕊张国辉皇甫慧君朱瑞龙曹晨茜王青王超周晓慧
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap