CN115650353A - High-efficiency composite decoloring agent and preparation method thereof - Google Patents
High-efficiency composite decoloring agent and preparation method thereof Download PDFInfo
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- CN115650353A CN115650353A CN202211396235.8A CN202211396235A CN115650353A CN 115650353 A CN115650353 A CN 115650353A CN 202211396235 A CN202211396235 A CN 202211396235A CN 115650353 A CN115650353 A CN 115650353A
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Abstract
The invention provides a high-efficiency composite decoloring agent and a preparation method thereof, and the high-efficiency composite decoloring agent is mainly prepared from the following raw materials: the material is mainly prepared from the following raw materials: the paint comprises, by mass, 12-20 parts of polyaluminum chloride, 2-6 parts of diatomite, 7-12 parts of activated carbon, 15-23 parts of polydimethyldiallyl ammonium chloride, 10-18 parts of polyvinylamine, 10-16 parts of ethylene glycol, 22-28 parts of dicyandiamide-formaldehyde resin and 40-48 parts of deionized water. The medicament adopts a formula combining inorganic and organic substances and a reaction mechanism combining physical adsorption and chemical reaction, so that the formula has the characteristics of high decoloring efficiency and good flocculation effect.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an efficient compound decolorizing agent.
Background
The printing and dyeing wastewater generally belongs to organic wastewater, and the contained colors and pollutants mainly comprise natural organic substances (wax, colloid, hemicellulose, grease and the like contained in natural fibers) and artificially synthesized organic substances (dyes, auxiliaries, sizing agents and the like). The waste water is dark in color due to the residues of various dyes in the water during the printing and dyeing process. In recent years, with the use of a large amount of novel auxiliaries and slurries, the biodegradability of organic pollutants is reduced and the treatment difficulty is increased. The discharge of a large amount of printing and dyeing wastewater becomes one of the important factors threatening the water environment safety in China. Therefore, the treatment of printing and dyeing wastewater becomes important to research, wherein flocculation and decoloration are very important steps in the treatment of printing and dyeing wastewater, and at present, domestic decolorants have the problems of large dosage and incapability of well balancing flocculation and decoloration.
Therefore, it is necessary to develop a highly efficient decolorizing agent for treating printing and dyeing wastewater.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a high-efficiency composite decolorizing agent, which adopts a formula combining inorganic substances and organic substances and a reaction mechanism combining physical adsorption and chemical reaction, so that the formula has the characteristics of high decolorizing efficiency and good flocculation effect.
The second purpose of the invention is to provide the preparation method of the high-efficiency composite decolorizing agent, which has the advantages of simple operation, mild operation conditions, no pollution, no discharge of three wastes, safety and environmental protection.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a high-efficiency composite decoloring agent, which is mainly prepared from the following raw materials: the paint comprises, by mass, 12-20 parts of polyaluminium chloride, 2-6 parts of diatomite, 7-12 parts of activated carbon, 15-23 parts of poly dimethyl diallyl ammonium chloride, 10-18 parts of polyvinylamine, 10-16 parts of ethylene glycol, 22-28 parts of dicyandiamide formaldehyde resin and 40-48 parts of deionized water.
Preferably, the preparation method comprises the following steps of 14-18 parts of polyaluminium chloride, 3-5 parts of diatomite, 9-11 parts of activated carbon, 18-20 parts of polydimethyldiallylammonium chloride, 12-16 parts of polyvinylamine, 12-14 parts of ethylene glycol, 24-26 parts of dicyandiamide formaldehyde resin and 42-46 parts of deionized water in parts by mass.
Preferably, as a further practicable scheme, the modified polyvinyl chloride paint comprises, by mass, 15 parts of polyaluminum chloride, 3.5 parts of diatomite, 8 parts of activated carbon, 16 parts of polydimethyldiallyl ammonium chloride, 12 parts of polyvinylamine, 11 parts of ethylene glycol, 22 parts of dicyandiamide-formaldehyde resin and 42 parts of deionized water.
Preferably, as a further practicable embodiment, the modified polyvinyl chloride resin composition comprises 16 parts by mass of polyaluminium chloride, 4 parts by mass of diatomite, 10 parts by mass of activated carbon, 19 parts by mass of polydimethyldiallylammonium chloride, 15 parts by mass of polyvinylamine, 13 parts by mass of ethylene glycol, 25 parts by mass of dicyandiamide-formaldehyde resin and 45 parts by mass of deionized water.
In the formula of the high-efficiency composite decoloring agent, the components mainly playing a role in adsorption decoloring are as follows: diatomite and active carbon adsorb color ions and molecular components in water through strong adsorption effect on the surface, and then achieve the effect of removing chromaticity through flocculation precipitation.
The formula of the invention mainly comprises the following components with flocculation effect: the polyaluminum chloride, the polyvinylamine and the polydimethyldiallyl ammonium chloride have the effects of absorbing, electrically neutralizing and compressing a double electric layer, and have the phase result with negative ionic color groups and suspended substance particles in water, and the effect of removing suspended substances, colloids and chromaticity in water is achieved through the effect of flocculation precipitation.
The components mainly playing the role of physical and chemical reactions are as follows: the polydimethyldiallyl ammonium chloride and dicyandiamide-formaldehyde resin can neutralize negative charges attached to dye molecules in wastewater by providing a large amount of cations so as to destabilize the dye molecules, and finally generate a large amount of floccules, thereby achieving the aim of decoloring.
The components in the high-efficiency composite decoloring agent can play a good synergistic effect only by controlling the components within a proper dosage range, and in order to ensure that the components can be well combined to play a role, solvent water and a regulator glycol are added, so that the components are more stable and can play a good role.
In the above formula, attention needs to be paid to the addition relationship among the substances, and the addition amount of each substance needs to be controlled within a reasonable range, because if the addition amount of any one of the components is too large, the effect of the other components is masked, and the decoloring effect is affected although the stability is improved, so attention needs to be paid to the compatibility between the amounts in addition to the specific matching between the formulas.
The decolorizing agent in the formula of the invention has no toxicity or irritation, good water solubility, good intermiscibility with various substances and excellent decolorizing and flocculating effects.
The invention also provides a preparation method of the high-efficiency composite decoloring agent, which comprises the following steps:
sequentially adding the raw materials into a stirring kettle according to the sequence of deionized water, ethylene glycol, dicyandiamide-formaldehyde resin, poly dimethyl diallyl ammonium chloride, polyvinyl amine, polyaluminium chloride, diatomite and active carbon, and starting mixing and stirring;
after the reaction, the mixture was cooled to room temperature.
Preferably, as a further implementable solution, the temperature of the mixing stirring is 60 to 90 ℃.
Preferably, as a further practicable variant, the mixing speed is between 80 and 120rpm.
Preferably, as a further implementable solution, the mixing and stirring time is 1 to 3 hours.
By limiting each operation parameter in the preparation method, the quality of the prepared high-efficiency composite decoloring agent is improved, the high-efficiency composite decoloring agent has good stability, the decoloring and flocculating effect is greatly improved, the decoloring effect of printing and dyeing wastewater can be improved, and the flocculating and decoloring effects are effectively considered.
In a word, the high-efficiency composite decoloring agent prepared by the preparation method is green and environment-friendly, excellent in stability and good in cleaning effect.
Compared with the prior art, the invention has the following beneficial effects:
(1) By adopting the formula of various decolorizing components, the good decolorizing effect is achieved.
(2) By adopting a formula combining an organic flocculant and an inorganic flocculant, a good flocculation effect is achieved.
(3) By adopting the formula combining dehydration and flocculation, the double functions of decolorization and flocculation are achieved.
(4) The decolorizing effect is better with the same adding amount through the optimization of the formula.
By applying the water treatment agent to wastewater treatment, the synergistic effect between the decolorizing component and the flocculating component can be better exerted, and the water treatment agent has the characteristics of low investment cost, low operating cost, low effluent chromaticity and the like. The invention has important significance for social environment management.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are not indicated by manufacturers and are commercially available.
Example 1
The specific preparation process of the high-efficiency composite decoloring agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
20 parts of polyaluminum chloride, 6 parts of diatomite, 12 parts of activated carbon, 23 parts of poly-dimethyldiallylammonium chloride, 18 parts of polyvinylamine, 16 parts of ethylene glycol, 28 parts of dicyandiamide-formaldehyde resin and 48 parts of deionized water;
2. sequentially adding the raw materials into a stirring kettle according to the sequence of deionized water, ethylene glycol, dicyandiamide-formaldehyde resin, poly dimethyl diallyl ammonium chloride, polyvinyl amine, polyaluminium chloride, diatomite and active carbon, and starting mixing and stirring;
the temperature of the stirring kettle is set to be 60 ℃, the stirring is carried out at normal pressure, the stirring speed is 80rpm, and the stirring time is 1h;
3. after the mixing and stirring reaction is finished, cooling to room temperature;
4. obtaining the high-efficiency compound decolorant, packaging, detecting and forming products for sale.
Example 2
The specific preparation process of the high-efficiency composite decoloring agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
12 parts of polyaluminum chloride, 2 parts of diatomite, 7 parts of activated carbon, 15 parts of polydimethyldiallyl ammonium chloride, 10 parts of polyvinylamine, 10 parts of ethylene glycol, 22 parts of dicyandiamide-formaldehyde resin and 40 parts of deionized water.
2. Sequentially adding the raw materials into a stirring kettle according to the sequence of deionized water, ethylene glycol, dicyandiamide-formaldehyde resin, polydimethyldiallyl ammonium chloride, polyvinylamine, polyaluminum chloride, diatomite and activated carbon, and starting mixing and stirring;
the temperature of the stirring kettle is set to be 90 ℃, the stirring is carried out at normal pressure, the stirring speed is 120rpm, and the stirring time is 3 hours;
3. after the mixing and stirring reaction is finished, cooling to room temperature;
4. the high-efficiency composite decoloring agent is obtained, packaged, detected and formed into a product for sale.
Example 3
The specific preparation process of the high-efficiency composite decoloring agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
12 parts of polyaluminum chloride, 2 parts of diatomite, 7 parts of activated carbon, 15 parts of polydimethyldiallyl ammonium chloride, 10 parts of polyvinylamine, 10 parts of ethylene glycol, 22 parts of dicyandiamide-formaldehyde resin and 40 parts of deionized water.
2. Sequentially adding the raw materials into a stirring kettle according to the sequence of deionized water, ethylene glycol, dicyandiamide-formaldehyde resin, poly dimethyl diallyl ammonium chloride, polyvinyl amine, polyaluminium chloride, diatomite and active carbon, and starting mixing and stirring;
the temperature of the stirring kettle is set to be 70 ℃, the stirring is carried out at normal pressure, the stirring speed is 90rpm, and the stirring time is 2 hours;
3. after the mixing and stirring reaction is finished, cooling to room temperature;
4. the high-efficiency composite decoloring agent is obtained, packaged, detected and formed into a product for sale.
Example 4
The specific preparation process of the high-efficiency composite decoloring agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
20 parts of polyaluminum chloride, 6 parts of diatomite, 12 parts of activated carbon, 23 parts of polydimethyldiallyl ammonium chloride, 18 parts of polyvinylamine, 16 parts of ethylene glycol, 28 parts of dicyandiamide-formaldehyde resin and 48 parts of deionized water.
2. Sequentially adding the raw materials into a stirring kettle according to the sequence of deionized water, ethylene glycol, dicyandiamide-formaldehyde resin, poly dimethyl diallyl ammonium chloride, polyvinyl amine, polyaluminium chloride, diatomite and active carbon, and starting mixing and stirring;
the temperature of the stirring kettle is set to be 80 ℃, the stirring is carried out at normal pressure, the stirring speed is 100rpm, and the stirring time is 2 hours;
3. after the mixing and stirring reaction is finished, cooling to room temperature;
4. the high-efficiency composite decoloring agent is obtained, packaged, detected and formed into a product for sale.
Example 5
The specific operation steps are consistent with those of the example 4, and the raw materials are mixed according to the following parts by weight:
15 parts of polyaluminum chloride, 3.5 parts of diatomite, 8 parts of activated carbon, 16 parts of polydimethyldiallyl ammonium chloride, 12 parts of polyvinylamine, 11 parts of ethylene glycol, 22 parts of dicyandiamide-formaldehyde resin and 42 parts of deionized water.
Example 6
The specific operation steps are consistent with those of the embodiment 4, and the raw materials are mixed according to the following parts by weight:
16 parts of polyaluminum chloride, 4 parts of diatomite, 10 parts of activated carbon, 19 parts of polydimethyldiallyl ammonium chloride, 15 parts of polyvinylamine, 13 parts of ethylene glycol, 25 parts of dicyandiamide-formaldehyde resin and 45 parts of deionized water.
Comparative example 1
The procedure was as in example 4 except that polydimethyldiallylammonium chloride was not added.
Comparative example 2
The specific procedure is identical to example 4, except that no polyvinylamine is added.
Comparative example 3
The specific procedure is identical to that of example 4, except that no diatomaceous earth is added.
Experimental example 1
A comparative test was performed on one of the high-performance composite decolorizers of examples 1 to 6 and comparative examples 1 to 3, printing and dyeing wastewater of a certain printing and dyeing mill was taken and divided into 12 parts of 1000ml, the decolorizer was added to each part of the printing and dyeing wastewater in an amount of 50mg, and after the addition, each part of the printing and dyeing wastewater was stirred and left to stand for 1 hour, and the chromaticity of each wastewater was detected, and the chromaticity removal rate of each decolorizer was calculated, and the results are shown in table 1:
TABLE 1 results of the experiment
| Decolorizing agent | Chroma removal Rate (%) |
| Example 1 | 98.8 |
| Example 2 | 98.6 |
| Example 3 | 98.9 |
| Example 4 | 98.2 |
| Example 5 | 99.1 |
| Example 6 | 99.5 |
| Comparative example 1 | 93.4 |
| Comparative example 2 | 94.5 |
| Comparative example 3 | 92.6 |
From the above table, it can be seen that the chroma removal rate of all the embodiments of the high-efficiency composite decoloring agent disclosed by the invention is over 97%, and the requirements of customers are well met. Comparative examples 1 to 3 were poor in decoloring effect because the compounding ratio of the raw materials was not controlled within a suitable range, and thus it was found that a specific amount of each component was necessary.
In conclusion, the components of the decolorizer of the present invention are all necessarily included, but none of them is necessary, and if any one of them is added in a small amount or the components are not set within a proper amount range, the final decolorization effect is influenced to some extent.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (8)
1. The efficient composite decoloring agent is characterized by being mainly prepared from the following raw materials: the paint comprises, by mass, 12-20 parts of polyaluminum chloride, 2-6 parts of diatomite, 7-12 parts of activated carbon, 15-23 parts of polydimethyldiallyl ammonium chloride, 10-18 parts of polyvinylamine, 10-16 parts of ethylene glycol, 22-28 parts of dicyandiamide-formaldehyde resin and 40-48 parts of deionized water.
2. The efficient composite decoloring agent according to claim 1, wherein the efficient composite decoloring agent comprises, by mass, 12-20 parts of polyaluminum chloride, 2-6 parts of diatomite, 7-12 parts of activated carbon, 15-23 parts of polydimethyldiallyl ammonium chloride, 10-18 parts of polyvinylamine, 10-16 parts of ethylene glycol, 22-28 parts of dicyandiamide-formaldehyde resin and 40-48 parts of deionized water.
3. The efficient composite decoloring agent according to claim 1, wherein the efficient composite decoloring agent comprises, by mass, 15 parts of polyaluminium chloride, 3.5 parts of diatomite, 8 parts of activated carbon, 16 parts of polydimethyldiallylammonium chloride, 12 parts of polyvinylamine, 11 parts of ethylene glycol, 22 parts of dicyandiamide-formaldehyde resin and 42 parts of deionized water.
4. The efficient composite decoloring agent according to claim 1, wherein the efficient composite decoloring agent comprises 16 parts of polyaluminium chloride, 4 parts of diatomite, 10 parts of activated carbon, 19 parts of polydimethyldiallylammonium chloride, 15 parts of polyvinylamine, 13 parts of ethylene glycol, 25 parts of dicyandiamide-formaldehyde resin and 45 parts of deionized water in parts by mass.
5. The preparation method of the high-efficiency compound decolorant of any one of claims 1 to 4, which is characterized by comprising the following steps:
sequentially adding the raw materials into a stirring kettle according to the sequence of deionized water, ethylene glycol, dicyandiamide-formaldehyde resin, poly dimethyl diallyl ammonium chloride, polyvinyl amine, polyaluminium chloride, diatomite and active carbon, and starting mixing and stirring;
after the reaction, the mixture was cooled to room temperature.
6. The method according to claim 5, wherein the temperature of the mixing and stirring is 60 to 90 ℃.
7. The production method according to claim 5, wherein the mixing and stirring are carried out at a rotation speed of 80 to 120rpm.
8. The method of claim 5, wherein the mixing is carried out for a period of time ranging from 1 to 3 hours.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117024692A (en) * | 2023-10-09 | 2023-11-10 | 杭州尚善若水环保科技有限公司 | Mixed decoloring agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117024692A (en) * | 2023-10-09 | 2023-11-10 | 杭州尚善若水环保科技有限公司 | Mixed decoloring agent |
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