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Composite flocculant for treating dye wastewater as well as preparation method and application of composite flocculant

A composite flocculant and dye wastewater technology, applied in chemical instruments and methods, textile industry wastewater treatment, water/sludge/sewage treatment, etc., can solve problems such as the impact of flocculation effect, achieve stable flocculant effect, improve form, stable effect

Active Publication Date: 2022-07-15
山东艾维斯特精细化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In engineering practice, the printing and dyeing wastewater pretreated by flocculation not only contains a variety of dyes, but also contains various dyeing auxiliaries and inorganic salts added in different processes. These substances have complex effects on the flocculation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The composite flocculant for treating dye wastewater described in Example 1 is composed of the following raw materials in parts by weight: 0.6 part of cationic polyacrylamide, chlorinated poly-2-hydroxypropyl-1,1-N-dimethylformaldehyde 8 parts of base ammonium, 3 parts of cetyltrimethyl ammonium bromide, 3.5 parts of polydimethyldiallyl ammonium chloride, 1 part of polyethyleneimine, 7 parts of ferrous sulfate, 2 parts of sodium silicate , 8 parts of polyaluminum ferric sulfate, and 0.05 part of polyacrylic acid.

[0043] in:

[0044] The preparation method of cationic polyacrylamide consists of the following steps:

[0045] (1) Add N,N,N-trimethyl-3-(2-methacrylamido)-1-propylammonium chloride, acrylamide, disodium EDTA and deionized water to the In the reactor, stir to dissolve;

[0046] (2) Pass nitrogen into the reactor for 25min, then add the initiator, and continue to pass nitrogen for 15min;

[0047] (3) Stop the nitrogen flow and raise the temperature to the...

Embodiment 2

[0064] The composite flocculant for treating dye wastewater described in Example 2 is composed of the following raw materials in parts by weight: 0.5 part of cationic polyacrylamide, chlorinated poly-2-hydroxypropyl-1,1-N-dimethylformaldehyde 9 parts of base ammonium, 4 parts of cetyltrimethyl ammonium bromide, 3 parts of polydimethyldiallyl ammonium chloride, 0.8 parts of polyethyleneimine, 6 parts of ferrous sulfate, 2.5 parts of sodium silicate , 10 parts of polyaluminum ferric sulfate, and 0.08 parts of polyacrylic acid.

[0065] in:

[0066] The preparation method of cationic polyacrylamide consists of the following steps:

[0067] (1) Add N,N,N-trimethyl-3-(2-methacrylamido)-1-propylammonium chloride, acrylamide, disodium EDTA and deionized water to the In the reactor, stir to dissolve;

[0068] (2) Pass nitrogen into the reactor for 20min, then add the initiator, and continue to pass nitrogen for 15min;

[0069] (3) Stop the nitrogen flow and raise the temperature t...

Embodiment 3

[0086] The composite flocculant for treating dye wastewater described in Example 3 is composed of the following raw materials in parts by weight: 0.8 part of cationic polyacrylamide, chlorinated poly-2-hydroxypropyl-1,1-N-dimethylformaldehyde 7 parts of base ammonium, 5 parts of cetyltrimethyl ammonium bromide, 4.5 parts of polydimethyldiallyl ammonium chloride, 1.5 parts of polyethyleneimine, 5 parts of ferrous sulfate, 2 parts of sodium silicate , 9 parts of polyaluminum ferric sulfate, and 0.1 part of polyacrylic acid.

[0087] in:

[0088] The preparation method of cationic polyacrylamide consists of the following steps:

[0089] (1) Add N,N,N-trimethyl-3-(2-methacrylamido)-1-propylammonium chloride, acrylamide, disodium EDTA and deionized water to the In the reactor, stir to dissolve;

[0090] (2) Pass nitrogen into the reactor for 23min, then add the initiator, and continue to pass nitrogen for 14min;

[0091] (3) Stop the nitrogen flow and raise the temperature to t...

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Abstract

The invention belongs to the technical field of flocculants, and particularly relates to a composite flocculant for treating dye wastewater as well as a preparation method and application of the composite flocculant. The flocculating agent is prepared from the following raw materials in parts by weight: 0.5 to 0.8 part of cationic polyacrylamide, 7 to 9 parts of chlorinated poly 2-hydroxypropyl-1, 1-N-dimethyl ammonium, 3 to 5 parts of hexadecyl trimethyl ammonium bromide, 3 to 4.5 parts of poly dimethyl diallyl ammonium chloride, 0.8 to 1.5 parts of polyethyleneimine, 5 to 7 parts of ferrous sulfate, 2 to 2.5 parts of sodium silicate, 8 to 10 parts of polyaluminum ferric sulfate and 0.05 to 0.1 part of polyacrylic acid. The composite flocculant disclosed by the invention has a relatively good removal effect on disperse dyes, sulfur dyes and reactive dyes; the preparation method of the composite flocculant for treating the dye wastewater is simple in process and easy to realize industrial production, and the flocculant prepared by the method is stable in effect and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and in particular relates to a composite flocculant for treating dye wastewater and a preparation method and application thereof. Background technique [0002] Printing and dyeing wastewater refers to wastewater discharged from textile processing industries such as cotton, hemp, and chemical fibers. It has the characteristics of large discharge, complex composition, and high chroma. Printing and dyeing wastewater mainly comes from pretreatment, dyeing, printing, finishing and other processes, and contains dyes, slurries, additives, oils, acid and alkali, fiber impurities, sand substances, inorganic salts, etc. It has the characteristics of complex composition and refractory biodegradation. The direct discharge of printing and dyeing wastewater without treatment will bring great harm to human health and the stability of the ecosystem, and also cause a waste of water resources. [0003] At pr...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/54C02F1/52C02F101/30C02F103/30
CPCC02F1/56C02F1/54C02F1/5236C02F2101/308C02F2103/30
Inventor 梁国栋梁效锋
Owner 山东艾维斯特精细化工有限公司
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