CN112717479A - Polyether defoaming agent and preparation method thereof - Google Patents
Polyether defoaming agent and preparation method thereof Download PDFInfo
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- CN112717479A CN112717479A CN202011588591.0A CN202011588591A CN112717479A CN 112717479 A CN112717479 A CN 112717479A CN 202011588591 A CN202011588591 A CN 202011588591A CN 112717479 A CN112717479 A CN 112717479A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
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Abstract
The invention provides a polyether defoaming agent and a preparation method thereof, wherein the polyether defoaming agent is mainly prepared from the following raw materials: 80-90 parts of polyoxypropylene polyethylene glycerol ether, 1-4 parts of fatty higher alcohol, 4-8 parts of octyl polymethylsiloxane, 1-4 parts of sheep fat, 1-5 parts of polyethylene glycol and 1-4 parts of oleamide. The polyether defoaming agent disclosed by the invention adopts a compound formula, and multiple components are matched for use, so that the synergistic effect is obviously increased, and the defoaming and foam inhibiting effects are excellent.
Description
Technical Field
The invention relates to the field of defoaming agents, and particularly relates to a polyether defoaming agent and a preparation method thereof.
Background
In the industrial production process, if a large amount of foam exists, a lot of troubles are brought to the production process, and the production capacity is greatly limited; waste of raw materials and products is caused; the quality of the product is influenced; environmental pollution, etc. Therefore, how to effectively control the foam in the production process becomes a focus of attention of researchers. Defoaming agents are now commonly used to eliminate foam generated in industrial processes.
The defoaming agents commonly used in industry can be generally classified into organic defoaming agents, silicone defoaming agents, polyether defoaming agents, and the like.
The organic silicon defoaming agent generally comprises products such as polydimethylsiloxane and the like, has the characteristics of high defoaming speed, good foam inhibition and the like, but is generally limited in application due to the defects of high price, water insolubility and the like; the polyether defoamer belongs to a nonionic surfactant, has excellent defoaming and foam inhibiting functions, is non-toxic, insoluble in water, soluble in an organic solvent, can be used independently, and can be prepared into emulsion for use. Among them, GPE type is particularly suitable for fermentation industry, and PPE is suitable for high temperature use. The product has the advantages of polyether and silicone defoaming agents, can defoam and inhibit foams in different media, has a defoaming effect which is 2-3 times stronger than that of a conventional defoaming agent, and has the characteristics of low toxicity, high surface activity, wide pH application range, low surface tension, high spreading speed and the like. The product can be dissolved in water in any proportion, can be subjected to high-temperature sterilization treatment, and can be widely applied to defoaming treatment in the fields of fermentation manufacturing of antibiotics, vitamins, food processing, papermaking, chemical industry, coatings, building materials, detergents and the like.
The polyether surfactant exists in water in a molecular state, has high stability, no toxicity, good intermiscibility with other types of surfactants, good foam inhibition effect, emulsifying capacity and washing effect, and is widely applied to various fields of industrial departments, civil washing and the like. With the development of the petroleum industry, the yield and variety of polyether surfactants are increasing. The molecular weight of polyether surfactants usually changes greatly, the composition and the structure of the polyether surfactants are complex, and the physical and chemical properties of polymers can be obviously changed by the difference.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a polyether defoaming agent with a simple formula, wherein the polyether defoaming agent is terminated by fatty high-carbon alcohol, so that two ends of a chain segment are changed into hydrophobic chains which are terminated by the fatty high-carbon alcohol, and block polymer molecules with hydrophilic chains are arranged in the middle, so that the defoaming strength is enhanced, the defoaming speed is improved, the low toxicity of the polyether defoaming agent is eliminated, the polyether defoaming agent has good defoaming and foam inhibiting capabilities, and the polyether defoaming agent is good in stability, durable in effect and environment-friendly. And due to the addition of micromolecule octyl polymethylsiloxane, the surface tension is small, the surface activity is high, the octyl polymethylsiloxane is easy to spread, the defoaming force is strong, and the octyl polymethylsiloxane has the functions of foam inhibition and foam breaking after being matched with the sheep fat, so that the defoaming duration and the usable time are effectively prolonged, and the defoaming speed and the production efficiency are improved.
The second purpose of the invention is to provide the preparation method of the polyether defoamer, which is simple to operate, mild in operation condition, free of pollution, free of three-waste discharge, safe and environment-friendly.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a polyether defoaming agent, which is mainly prepared from the following raw materials: the high-temperature-resistant polyethylene glycol grease comprises, by mass, 80-90 parts of polyoxypropylene polyethylene glycerol ether, 1-4 parts of fatty higher alcohol, 4-8 parts of octyl polymethylsiloxane, 1-4 parts of sheep fat, 1-5 parts of polyethylene glycol and 1-4 parts of oleamide.
Preferably, as a further practicable scheme, the modified polyethylene glycol oil-fat emulsion comprises, by mass, 82-89 parts of polyoxypropylene polyethylene glycerol ether, 2-3 parts of fatty higher alcohol, 5-7 parts of octyl polymethylsiloxane, 2-3 parts of sheep fat and oil, 2-3 parts of polyethylene glycol and 2-3 parts of oleamide.
Preferably, as a further practicable scheme, the oil-in-fat emulsion comprises 86 parts by mass of polyoxypropylene polyethylene glycerol ether, 3 parts by mass of fatty higher alcohol, 6 parts by mass of octyl polymethylsiloxane, 3 parts by mass of sheep fat, 3 parts by mass of polyethylene glycol and 3 parts by mass of oleamide.
In the formula of the polyether defoaming agent, the polyoxypropylene polyethylene glycerol ether has certain hydrophilicity and extensibility, and has no influence on defoaming activity by heating and repeated cyclic heating at a higher temperature. The defoaming agent is terminated by fatty high-carbon alcohol, so that two ends of polyoxypropylene ethylene oxide glycerol ether are changed into hydrophobic chains which are terminated by the fatty high-carbon alcohol, and the middle of the polyoxypropylene ethylene oxide glycerol ether is provided with block polymer molecules with hydrophilic chains at intervals, so that the defoaming force is enhanced, the defoaming speed is increased, and the toxicity is eliminated. The addition amount of the aliphatic higher alcohol is controlled between 2 and 3 parts, and the practice proves that the fat breaking speed can be good in the addition amount range, and if the addition amount is too large, the hydrophilicity and the ductility of the glycerol ether can be influenced.
And in addition, when the fatty high-carbon alcohol is added, octyl polymethylsiloxane and sheep fat are added in order to have good defoaming and foam-inhibiting effects when being matched with the fatty high-carbon alcohol, and the octyl polymethylsiloxane has the functions of inhibiting and breaking foam for all bubble systems due to low molecular weight, easy diffusion and spreading, high surface activity and strong defoaming force. The sheep fat is special fatty acid and collagen, has stable property, and can effectively prolong the defoaming duration. The combination of the two components enhances the defoaming and foam inhibiting effect, the mutton tallow is excellent in stability but not easy to diffuse, so that the defects of the mutton tallow are made up by the added octyl polymethylsiloxane, the defoaming and foam inhibiting effect can be improved by enhancing the ductility of the mutton tallow, the octyl polymethylsiloxane is controlled to be about 2 times of the dosage of the mutton tallow in general dosage, the effects of other components can be covered if the dosage of the components is too large, the activity is reduced and the foam inhibiting and foam inhibiting effect can be influenced although the stability is improved, and the compatibility relationship between the dosages can be noticed besides the specific collocation between formulas.
The polyethylene glycol in the formula of the invention has no toxicity or irritation, good water solubility, good intermiscibility with a plurality of organic matter components and excellent dispersibility. Oleic acid amide is used as a stabilizing and homogenizing agent.
The invention provides a formula of a polyether defoaming agent and a preparation method thereof, and the preparation method comprises the following steps:
stirring polyoxypropylene ethylene glycol glyceryl ether and fatty higher alcohol at 30-50 deg.C, adding other materials, and stirring.
Preferably, as a further practicable aspect, the other raw materials are added in the order of fatty higher alcohol, sheep fat, polyethylene glycol, oleamide, and octyl methicone.
Preferably, as a further implementable solution, the stirring rate is controlled between 40-70 rpm.
Preferably, as a further practicable embodiment, the time for stirring after adding the polyoxypropylene ethylene glycol glyceryl ether and the aliphatic higher alcohol is 1 to 1.5 hours.
Preferably, as a further practicable scheme, the fatty high-carbon alcohol is added and stirred for 0.5-2h, and then the sheep fat and the polyethylene glycol are added and stirred for 0.5-2 h.
Preferably, as a further practical embodiment, after the oleamide is added, the reaction temperature is 70-80 ℃, and the stirring is carried out for 1-2 h.
Preferably, as a further practical embodiment, after the octyl methicone is added, the reaction temperature is 70 to 80 ℃, and stirring is further carried out for 1 to 2 hours.
The quality of the prepared polyether defoaming agent is improved by limiting each operation parameter in the preparation method, the polyether defoaming agent has good stability and high defoaming strength, the defoaming speed is greatly improved while the low toxicity is eliminated, and the polyether defoaming agent is heat-resistant, acid-resistant, alkali-resistant and high-temperature system.
In a word, the polyether defoamer prepared by the preparation method is environment-friendly, good in defoaming effect and excellent in stability.
Compared with the prior art, the invention has the beneficial effects that:
(1) the polyether defoaming agent disclosed by the invention adopts a compound formula, and multiple components are matched for use, so that the synergistic effect is obviously increased, and the defoaming and foam inhibiting effects are excellent.
(2) The polyether defoaming agent disclosed by the invention has the advantages of good stability, high defoaming strength, capability of eliminating low toxicity, greatly improving defoaming speed, heat resistance, acid and alkali resistance and high temperature system.
(3) The polyether defoamer disclosed by the invention has the characteristics of no toxicity, no harm, simple process, lasting effect, environmental friendliness and the like. The defoaming agent is suitable for defoaming agents used in normal working procedures and discharged sewage in various processing industries, such as food industry, fiber industry, rubber industry, paper pulp industry, chemical industry and the like.
(4) The preparation method of the polyether defoamer is simple to operate, the whole preparation method is mild in operation condition, free of pollution, free of three-waste discharge, safe and environment-friendly.
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 not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The specific preparation process of the polyether defoamer comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
80 parts of polyoxypropylene polyethylene glycerol ether, 1 part of fatty higher alcohol, 4 parts of octyl polymethylsiloxane, 1 part of sheep fat, 1 part of polyethylene glycol and 1 part of oleamide.
2. In a reaction device with heating and stirring functions, polyoxypropylene ethylene glycol glyceryl ether is added, and heating and stirring are carried out, wherein the stirring speed is 60rpm, the stirring time is 1.2h, and meanwhile, heating is carried out to 40 ℃.
3. On the basis of the temperature of 40 ℃, putting aliphatic higher alcohol into a reaction device for stirring, wherein the stirring speed is 60rpm, and the stirring time is 1 h; the structural form of the defoaming agent is terminated by fatty high-carbon alcohol, so that two ends of a chain segment are changed into hydrophobic chains using the fatty high-carbon alcohol as the termination, and a block polymer molecule with an interval hydrophilic chain is arranged in the middle, so that the defoaming strength is enhanced, the defoaming speed is improved, and the low toxicity is eliminated.
4. And (3) adding the mutton fat and the polyethylene glycol into the reaction device, and stirring at the rotating speed of 60rpm for 1 h.
5. The stable and uniform agent oleamide is put into the reaction device, at the moment, the reaction device is heated to 75 ℃, stirring is carried out, the stirring speed is 60rpm, and the stirring time is 1 h.
6. On the basis of the temperature of 75 ℃, octyl polymethylsiloxane is added into a reaction device, the temperature is kept at 75 ℃, stirring is carried out, the stirring speed is 60rpm, the stirring time is 2 hours, heating is stopped after homogenization, and the defoaming agent is obtained after natural cooling to the normal temperature.
7. And packaging, detecting and forming a product for sale.
Example 2
The specific preparation process of the polyether defoamer comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
84 parts of polyoxypropylene polyethylene glycerol ether, 2 parts of fatty higher alcohol, 5 parts of octyl polymethylsiloxane, 2 parts of sheep fat, 2 parts of polyethylene glycol and 2 parts of oleamide.
2. In a reaction device with heating and stirring functions, polyoxypropylene ethylene glycol glyceryl ether is added, and heating and stirring are carried out, wherein the stirring speed is 40rpm, the stirring time is 1.5h, and meanwhile, heating is carried out to 50 ℃.
3. On the basis of the temperature of 50 ℃, adding aliphatic higher alcohol into a reaction device for stirring, wherein the stirring speed is 40rpm, and the stirring time is 0.5 h; the structural form of the defoaming agent is terminated by fatty high-carbon alcohol, so that two ends of a chain segment are changed into hydrophobic chains using the fatty high-carbon alcohol as the termination, and a block polymer molecule with an interval hydrophilic chain is arranged in the middle, so that the defoaming strength is enhanced, the defoaming speed is improved, and the low toxicity is eliminated.
4. And (3) adding the mutton fat and the polyethylene glycol into the reaction device, and stirring at the rotating speed of 40rpm for 2 hours.
5. The stable and uniform agent oleamide is put into the reaction device, at the moment, the reaction device is heated to 70 ℃ and stirred, the stirring speed is 40rpm, and the stirring time is 2 hours.
6. On the basis of the temperature of 70 ℃, octyl polymethylsiloxane is added into a reaction device, the temperature is kept at 70 ℃, stirring is carried out, the stirring speed is 40rpm, the stirring time is 2 hours, heating is stopped after homogenization, and the defoaming agent is obtained after natural cooling to the normal temperature.
7. And packaging, detecting and forming a product for sale.
Example 3
The specific preparation process of the polyether defoamer comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
86 parts of polyoxypropylene polyethylene glycerol ether, 3 parts of fatty higher alcohol, 6 parts of octyl polymethylsiloxane, 3 parts of sheep fat, 3 parts of polyethylene glycol and 3 parts of oleamide.
2. In a reaction apparatus with heating and stirring functions, polyoxypropylene oxyethylene glycerin ether was charged, heated and stirred at a stirring speed of 70rpm for 1 hour while heating to 40 ℃.
3. On the basis of the temperature of 40 ℃, putting aliphatic high-carbon alcohol into a reaction device for stirring, wherein the stirring speed is 70rpm, and the stirring time is 2 hours; the structural form of the defoaming agent is terminated by fatty high-carbon alcohol, so that two ends of a chain segment are changed into hydrophobic chains using the fatty high-carbon alcohol as the termination, and a block polymer molecule with an interval hydrophilic chain is arranged in the middle, so that the defoaming strength is enhanced, the defoaming speed is improved, and the low toxicity is eliminated.
4. And (3) adding the mutton fat and the polyethylene glycol into the reaction device, and stirring at the rotating speed of 70rpm for 1 h.
5. The stable and uniform agent oleamide is put into the reaction device, at the moment, the reaction device is heated to 80 ℃, and stirring is carried out, wherein the stirring speed is 70rpm, and the stirring time is 1 h.
6. On the basis of the temperature of 80 ℃, octyl polymethylsiloxane is added into a reaction device, the temperature is kept at 80 ℃, stirring is carried out, the stirring speed is 70rpm, the stirring time is 1.5h, heating is stopped after homogenization, and the defoaming agent is obtained after natural cooling to the normal temperature.
7. And packaging, detecting and forming a product for sale.
Example 4
The specific operation steps are consistent with those of the embodiment 3, and the raw materials are mixed according to the following parts by weight:
82 parts of polyoxypropylene polyethylene glycerol ether, 2 parts of fatty higher alcohol, 7 parts of octyl polymethylsiloxane, 2 parts of sheep fat, 3 parts of polyethylene glycol and 3 parts of oleamide.
Example 5
The specific operation steps are consistent with those of the embodiment 3, and the raw materials are mixed according to the following parts by weight:
89 parts of polyoxypropylene polyethylene glycerol ether, 3 parts of fatty higher alcohol, 5 parts of octyl polymethylsiloxane, 3 parts of sheep fat, 2 parts of polyethylene glycol and 2 parts of oleamide.
Comparative example 1
The specific procedure was as in example 3 except that the amount of the aliphatic higher alcohol was 6 parts.
Comparative example 2
The procedure was as in example 3 except that 2 parts of octyl methicone were added.
Comparative example 3
The specific operation steps are the same as those in example 3, except that the addition amount of the sheep fat is 1 part.
Comparative example 4
Commercial products: SP-306 polyether defoamer.
Experimental example 1
The specific treatment effects of the polyether defoamers of examples 1 to 5 and comparative examples 1 to 4 were evaluated, and the specific results are shown in table 1 below:
the main apparatus device: a shaking shaker and a 500mL measuring cylinder with a plug;
and (3) testing conditions are as follows: 25 ℃;
test medium: a standard foaming liquid;
the specific test method comprises the following steps: weighing 0.25g of nonylphenol polyoxyethylene (10) ether and 0.25g (30 percent content) of sodium dodecyl benzene sulfonate, dissolving in 50mL of water, mixing, stirring to obtain a uniform transparent liquid, and adding water to dilute to 100mL, thus obtaining a standard foaming liquid; pouring 500mL of standard foaming liquid into a measuring cylinder, placing the measuring cylinder into a shaking flask shaker to shake for 5min at the frequency of 200 times/min, stopping shaking when the height of foam reaches 400mL scale, adding 0.2mL of the foam obtained in the embodiment and the comparative example, and recording the time required by foam elimination by using a stopwatch, namely the defoaming time; the cylinder was again placed in the shaker and shaken, and the time required for the foam height to reach 400mL again was recorded.
TABLE 1 results of treatment
As can be seen from Table 1 above, the polyether antifoaming agent of the present invention has greatly improved antifoaming time and foam suppressing time, and has good antifoaming and foam suppressing effects and good dispersibility, compared to comparative examples 1-4. Comparative examples 1 to 3 were poor in defoaming effect because the compounding ratio of the raw materials was not controlled within an appropriate range, and it was found that a specific amount of each component thereof was also necessary.
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 (10)
1. The polyether defoamer is characterized by being mainly prepared from the following raw materials: 80-90 parts of polyoxypropylene polyethylene glycerol ether, 1-4 parts of fatty higher alcohol, 4-8 parts of octyl polymethylsiloxane, 1-4 parts of sheep fat, 1-5 parts of polyethylene glycol and 1-4 parts of oleamide.
2. The polyether defoaming agent according to claim 1, wherein the polyether defoaming agent comprises, by mass, 82-89 parts of polyoxypropylene polyethylene glycerol ether, 2-3 parts of fatty higher alcohol, 5-7 parts of octyl polymethylsiloxane, 2-3 parts of sheep fat, 2-3 parts of polyethylene glycol and 2-3 parts of oleamide.
3. The polyether defoaming agent according to claim 1, wherein the polyether defoaming agent comprises 86 parts by mass of polyoxypropylene polyethylene glycerol ether, 3 parts by mass of fatty higher alcohol, 6 parts by mass of octyl polymethylsiloxane, 3 parts by mass of mutton fat, 3 parts by mass of polyethylene glycol and 3 parts by mass of oleamide.
4. A method for preparing the polyether defoamer of any one of claims 1 to 3, comprising the steps of:
stirring polyoxypropylene ethylene glycol glyceryl ether and fatty higher alcohol at 30-50 deg.C, adding other materials, and stirring.
5. The preparation method according to claim 4, wherein the other raw materials are added in the order of fatty higher alcohol, sheep fat, polyethylene glycol, oleamide and octyl methicone.
6. The production method according to claim 4 or 5, wherein the stirring rate is controlled to be between 40 and 70 rpm.
7. The method according to claim 4, wherein the time for stirring after adding the polyoxypropylene ethylene glycol glyceryl ether and the aliphatic higher alcohol is 1 to 1.5 hours.
8. The preparation method according to claim 5, wherein the fatty higher alcohol is added and stirred for 0.5-2h, and then the sheep fat and the polyethylene glycol are added and stirred for 0.5-2 h.
9. The process according to claim 5, wherein the reaction temperature is 70 to 80 ℃ and the mixture is stirred for 1 to 2 hours after the oleamide is added.
10. The method according to claim 5, wherein the reaction temperature is 70-80 ℃ after the octyl methicone is added, and the mixture is stirred for 1-2 hours.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400463A (en) * | 2022-09-22 | 2022-11-29 | 广东中联邦精细化工有限公司 | Biochemical aeration tank sewage treatment defoaming agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400463A (en) * | 2022-09-22 | 2022-11-29 | 广东中联邦精细化工有限公司 | Biochemical aeration tank sewage treatment defoaming agent and preparation method thereof |
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