CN112190981A - Efficient defoaming agent for high-temperature evaporation system and preparation method thereof - Google Patents
Efficient defoaming agent for high-temperature evaporation system and preparation method thereof Download PDFInfo
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- CN112190981A CN112190981A CN202011017167.0A CN202011017167A CN112190981A CN 112190981 A CN112190981 A CN 112190981A CN 202011017167 A CN202011017167 A CN 202011017167A CN 112190981 A CN112190981 A CN 112190981A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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Abstract
The invention provides a high-efficiency defoaming agent for a high-temperature evaporation system and a preparation method thereof, wherein the defoaming agent is mainly prepared from the following raw materials: 30-40 parts of polyethylene glycol ether, 35-50 parts of dimethyl silicone oil, 5-10 parts of rosin glyceride, 5-12 parts of higher alcohol, 2-4 parts of carbon black and 3-5 parts of a dispersing agent. The defoaming agent has good defoaming and foam inhibiting performance, can keep good foam inhibiting performance under a high-temperature condition, is particularly suitable for a high-temperature evaporation system, and enables the system to operate stably.
Description
Technical Field
The invention relates to the field of preparation of defoaming agents, and particularly relates to a high-efficiency defoaming agent for a high-temperature evaporation system and a preparation method thereof.
Background
The high-temperature evaporation system is very easy to generate foam to cause equipment failure, and currently used defoaming agents comprise 7 types of emulsified silicone oil, high-alcohol fatty acid ester compounds, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether, polydimethylsiloxane and the like. However, the defoaming agent in the prior art generally has poor high temperature resistance, or the defoaming property and the foam inhibition property do not meet the requirements of field use, or the expected defoaming effect can be achieved only under the condition of large addition amount, so that the production cost is increased.
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 defoaming agent for a high-temperature evaporation system, which has good defoaming and foam inhibiting performance, can keep good foam inhibiting performance under a high-temperature condition, can obtain good defoaming effect under the condition of less using amount, is particularly suitable for the high-temperature evaporation system, and enables the system to operate stably.
The second purpose of the invention is to provide the preparation method of the defoaming agent, 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 defoaming agent, which is mainly prepared from the following raw materials: 30-40 parts of polyethylene glycol ether, 35-50 parts of dimethyl silicone oil, 5-10 parts of rosin glyceride, 5-12 parts of higher alcohol, 2-4 parts of carbon black and 3-5 parts of a dispersing agent.
Preferably, as a further practicable scheme, the modified polyvinyl alcohol resin comprises, by mass, 32-38 parts of polyethylene glycol ether, 37-47 parts of dimethyl silicone oil, 7-9 parts of rosin glyceride, 7-10 parts of higher alcohol, 2.5-3.5 parts of carbon black and 3.5-4.5 parts of a dispersing agent.
Preferably, as a further practicable scheme, by mass parts, 33 parts of polyethylene glycol ether, 46 parts of dimethyl silicone oil, 8 parts of rosin glyceride, 8 parts of higher alcohol, 2 parts of carbon black and 3 parts of a dispersing agent.
In the formula of the defoaming agent, the polyethylene glycol ether belongs to a commonly used water reducing agent, and the defoaming agent and the dimethyl silicone oil have synergistic effect, and utilize the defoaming and foam inhibition effects of the dimethyl silicone oil, and the dimethyl silicone oil has poor intersolubility with other organic matters due to too strong hydrophobicity, so that the dimethyl silicone oil can be more easily dispersed by introducing a hydrophilic alcohol ether chain segment, the emulsifying stability is higher, the boiling point of the product is improved, and the defoaming agent is very suitable for being used under the high-temperature condition. Meanwhile, the dosage of the alcohol ether substance needs to be controlled properly, if the dosage is too large, the defoaming and foam inhibiting performance can be affected, and if the dosage is too small, the compatibility among the substances is poor, so that the dosage needs to be controlled properly.
In addition, by utilizing the excellent effect of large surface area of the carbon black, the mutual matching degree of the components is facilitated, the mutual fusion is improved, and the defoaming effect is improved.
Preferably, in order to improve the defoaming effect, the carbon black is white carbon black, the average particle diameter of the white carbon black is 7-9 μm, and the specific surface area is 300-400m2/g。
The dispersant is preferably any one or more selected from methanol, ethanol and ethylene glycol, and the dispersibility of the defoaming agent can be remarkably enhanced by combining the higher alcohol with the dispersant. And the higher alcohol can also serve as a good active agent and wetting agent, the dosage of the higher alcohol directly determines the stability of the finally obtained product, so that the dosage needs to be controlled appropriately, and the dosage of the higher alcohol is too large, the state of the defoaming agent can be changed, and the dosage of the higher alcohol is not too large for improving the stability.
Practice shows that the addition of the rosin glyceride can obviously increase the shock resistance of the defoaming agent emulsion, improve the surface activity of the defoaming agent and enable the emulsion to have more excellent stability.
The invention provides a formula of the defoaming agent and also provides a preparation method of the defoaming agent, which comprises the following steps:
mixing dimethyl silicone oil and carbon black for 1-3h, adding polyglycol ether, mixing, adding the rest raw materials, and mixing.
Preferably, the temperature at which the dimethylsilicone oil and the carbon black are mixed is 80 to 120 ℃.
Preferably, the rest of the raw materials are added, mixed and stirred for more than 5 hours.
Preferably, the temperature for adding the rest of the raw materials and mixing and stirring is 50-80 ℃.
Preferably, the polyglycol ether is added for mixing for 1-2 h.
The quality of the prepared defoaming agent is improved by limiting each operation parameter in the preparation method.
In a word, the defoaming agent prepared by the preparation method is environment-friendly, has good defoaming and foam inhibiting effects, is uniform in texture and has excellent stability.
Compared with the prior art, the invention has the beneficial effects that:
(1) the defoaming agent adopts a compound formula, and multiple components are matched for use, so that the synergistic effect is obviously increased, and the defoaming effect is good.
(2) The defoaming agent can keep better foam inhibition performance under the high-temperature condition, is particularly suitable for a high-temperature evaporation system, and enables the system to operate stably.
(3) The defoaming agent disclosed by the invention is good in stability, and can ensure that a high-temperature evaporation system cannot be polluted after being defoamed after long-time operation, so that the defoaming agent is worthy of wide popularization and application.
(4) The preparation method of the defoaming agent 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 defoaming agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
30 parts of polyglycol ether, 50 parts of dimethyl silicone oil, 5 parts of rosin glyceride, 12 parts of high-carbon alcohol, 4 parts of white carbon black and 3 parts of methanol, wherein the particle size of the white carbon black is 7-9 mu m, and the specific surface area is 400m2/g；
2. Mixing dimethyl silicone oil and white carbon black for 2 hours at 100 ℃;
3. cooling the substance obtained in the previous step, adding polyethylene glycol ether, and fully mixing for 1 h;
4. keeping the temperature at 50-80 ℃, adding rosin glyceride, high-carbon alcohol and methanol, and continuously stirring for 5 hours to obtain the required defoaming agent product.
Example 2
The specific preparation process of the defoaming agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
40 parts of polyglycol ether, 35 parts of dimethyl silicone oil, 10 parts of rosin glyceride, 5 parts of high-carbon alcohol, 2 parts of white carbon black and 5 parts of ethanol, wherein the particle size of the white carbon black is 7-9 mu m, and the specific surface area is 400m2/g；
2. Mixing dimethyl silicone oil and white carbon black for 1h at 80 ℃;
3. cooling the substance obtained in the previous step, adding polyethylene glycol ether, and fully mixing for 1 h;
4. keeping the temperature at 50-80 ℃, adding rosin glyceride, high-carbon alcohol and methanol, and continuously stirring for 6 hours to obtain the required defoaming agent product.
Example 3
The specific preparation process of the defoaming agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
32 parts of polyglycol ether, 47 parts of dimethyl silicone oil, 7 parts of rosin glyceride, 10 parts of high-carbon alcohol, 2.5 parts of white carbon black and 4.5 parts of methanol, wherein the particle size of the white carbon black is 7-9 mu m, and the specific surface area is 350m2/g；
2. Mixing dimethyl silicone oil and white carbon black for 3 hours at 120 ℃;
3. cooling the substance obtained in the previous step, adding polyethylene glycol ether, and fully mixing for 2 h;
4. keeping the temperature at 50-80 ℃, adding rosin glyceride, high-carbon alcohol and methanol, and continuously stirring for 5 hours to obtain the required defoaming agent product.
Example 4
The specific preparation process of the defoaming agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
38 parts of polyglycol ether, 37 parts of dimethyl silicone oil, 9 parts of rosin glyceride, 7 parts of higher alcohol, 3.5 parts of white carbon black and 3.5 parts of mixture of ethanol and glycol, wherein the particle size of the white carbon black is 7-9 mu m, and the specific surface area is 300m2/g；
2. Mixing dimethyl silicone oil and white carbon black for 2 hours at 100 ℃;
3. cooling the substance obtained in the previous step, adding polyethylene glycol ether, and fully mixing;
4. keeping the temperature at 50-80 ℃, adding rosin glyceride, high-carbon alcohol and methanol, and continuously stirring for 5 hours to obtain the required defoaming agent product.
Example 5
The specific preparation process of the defoaming agent comprises the following steps:
1. the raw materials are mixed according to the following parts by mass:
33 parts of polyglycol ether, 46 parts of dimethyl silicone oil, 8 parts of rosin glyceride, 8 parts of high carbon alcohol, 2 parts of white carbon black and 3 parts of methanol, wherein the particle size of the white carbon black is 7-9 mu m, and the specific surface area is 400m2/g；
2. Mixing dimethyl silicone oil and white carbon black for 2 hours at 100 ℃;
3. cooling the substance obtained in the previous step, adding polyethylene glycol ether, and fully mixing;
4. keeping the temperature at 50-80 ℃, adding rosin glyceride, high-carbon alcohol and methanol, and continuously stirring for 5 hours to obtain the required defoaming agent product.
Example 6
The procedure was as in example 5 except that the higher alcohol was added in an amount of 11 parts.
Example 7
The specific procedure was as in example 5, except that 39 parts of polyethylene glycol ether were added.
Comparative example 1
The specific procedure is identical to that of example 5, except that no rosin glycerol ester is added.
Comparative example 2
The procedure was as in example 5 except that no polyethylene glycol ether was added.
Comparative example 3
The specific procedure is identical to that of example 5, except that no carbon black is added.
Experimental example 1
The defoaming and foam-suppressing performances of the defoaming agents of examples 1 to 7 and comparative examples 1 to 3 were evaluated:
defoaming and foam suppressing properties were measured using the aeration-bubbling method; weighing 0.lg of sample (accurate to 0.lmg), adding 10ml of water to dilute and stir uniformly to obtain a defoaming agent diluent; weighing 1.0g (accurate to 0.lmg) of sodium dodecyl benzene sulfonate, placing the sodium dodecyl benzene sulfonate into a 1000ml beaker, adding 400ml of water, carefully stirring until the sodium dodecyl benzene sulfonate is completely dissolved, placing the beaker into a 100 ℃ water bath kettle for heat preservation, placing a bubbling head of a bubbler at the bottom of a solution in the beaker, starting bubbling at the air blowing rate of 2L/min, quickly and uniformly adding a defoaming agent diluent when foam reaches a cup mouth, simultaneously starting a stopwatch, recording the time of the foam until the foam is disappeared to the liquid level as defoaming time, and having short defoaming time and good defoaming effect; the foam rising time to 600ml, 800ml and 1000ml is the foam inhibition time, and the longer the foam inhibition time is, the higher the foam inhibition efficiency is; specific results are shown in table 1.
TABLE 1 results of treatment
As can be seen from table 1 above, the defoaming agent of the present invention has good emulsibility and uniform texture after the components are synergistically blended, and particularly, in example 5, the components of the defoaming agent are adjusted to the optimum values, which significantly improves the efficiency of suppressing foam, and can still ensure good defoaming effect at high temperature, but as can be seen from the data of examples 6 to 7, when the amount of the higher alcohol is increased or the amount of the polyethylene glycol ether is too high, the defoaming effect is not favorable, because the state of the defoaming agent itself is changed, thereby reducing the exertion of the defoaming effect.
Comparing the test result of example 5 with comparative examples 1-3, it can be known that each component is necessary for the formulation of the defoaming agent, and if each component is not added, the defoaming effect of the component can be finally influenced while the state of the defoaming agent is changed, so that the defoaming agent with good temperature resistance and defoaming effect can be finally obtained after the components are mixed according to the scheme of the invention.
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. A high-efficiency defoaming agent for a high-temperature evaporation system is characterized by being mainly prepared from the following raw materials: 30-40 parts of polyethylene glycol ether, 35-50 parts of dimethyl silicone oil, 5-10 parts of rosin glyceride, 5-12 parts of higher alcohol, 2-4 parts of carbon black and 3-5 parts of a dispersing agent.
2. The defoaming agent according to claim 1, wherein the defoaming agent comprises, by mass, 32-38 parts of polyethylene glycol ether, 37-47 parts of dimethyl silicone oil, 7-9 parts of rosin glyceride, 7-10 parts of higher alcohol, 2.5-3.5 parts of carbon black and 3.5-4.5 parts of a dispersing agent.
3. The antifoaming agent according to claim 1, characterized in that the antifoaming agent comprises, by mass, 33 parts of polyglycol ether, 46 parts of dimethyl silicone oil, 8 parts of rosin glyceride, 8 parts of higher alcohol, 2 parts of carbon black, and 3 parts of dispersant.
4. The antifoaming agent according to any of claims 1-3, characterized in that the dispersant is any one or more of methanol, ethanol, and ethylene glycol.
5. The defoaming agent according to any one of claims 1 to 3, wherein the carbon black is white carbon black, the average particle size of the white carbon black is 7 to 9 μm, and the specific surface area is 300-400m2/g。
6. A method of producing an antifoaming agent according to any of claims 1 to 5, characterized by comprising the steps of:
mixing dimethyl silicone oil and carbon black for 1-3h, adding polyglycol ether, mixing, adding the rest raw materials, and mixing.
7. The production method according to claim 6, wherein the temperature at which the dimethylsilicone oil and the carbon black are mixed is 80 to 120 ℃.
8. The process according to claim 6, wherein the remaining raw materials are added, mixed and stirred for 5 hours or more.
9. The method according to claim 6, wherein the temperature for adding the remaining raw materials and mixing and stirring is 50 to 80 ℃.
10. The method of claim 6, wherein the polyglycol ether is added and mixed for 1-2 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011017167.0A CN112190981A (en) | 2020-09-24 | 2020-09-24 | Efficient defoaming agent for high-temperature evaporation system and preparation method thereof |
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| CN202011017167.0A CN112190981A (en) | 2020-09-24 | 2020-09-24 | Efficient defoaming agent for high-temperature evaporation system and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095506A (en) * | 2004-08-30 | 2006-04-13 | Toho Chem Ind Co Ltd | Antifoaming agent composition |
| CN106563293A (en) * | 2016-11-01 | 2017-04-19 | 合肥新万成环保科技有限公司 | A high-strength compound defoamer |
| JP2019198807A (en) * | 2018-05-14 | 2019-11-21 | サンノプコ株式会社 | Defoaming agent |
| CN110639241A (en) * | 2019-10-15 | 2020-01-03 | 武汉三友石化有限公司 | Petroleum defoaming agent and preparation method thereof |
-
2020
- 2020-09-24 CN CN202011017167.0A patent/CN112190981A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095506A (en) * | 2004-08-30 | 2006-04-13 | Toho Chem Ind Co Ltd | Antifoaming agent composition |
| CN106563293A (en) * | 2016-11-01 | 2017-04-19 | 合肥新万成环保科技有限公司 | A high-strength compound defoamer |
| JP2019198807A (en) * | 2018-05-14 | 2019-11-21 | サンノプコ株式会社 | Defoaming agent |
| CN110639241A (en) * | 2019-10-15 | 2020-01-03 | 武汉三友石化有限公司 | Petroleum defoaming agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 丁继华: "《糖及糖制品生产工艺技术与产品质量控制标准全书》", 31 August 2003, 民族出版社 * |
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