CN113368544A - Safe and efficient defoaming agent and preparation method thereof - Google Patents
Safe and efficient defoaming agent and preparation method thereof Download PDFInfo
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- CN113368544A CN113368544A CN202110823837.6A CN202110823837A CN113368544A CN 113368544 A CN113368544 A CN 113368544A CN 202110823837 A CN202110823837 A CN 202110823837A CN 113368544 A CN113368544 A CN 113368544A
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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
- B01D19/0427—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing halogen-atoms
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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
- 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
- B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
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Abstract
The invention discloses a safe and efficient defoaming agent and a preparation method thereof, relating to the technical field of defoaming agents; the safe and efficient defoaming agent comprises the following raw materials in parts by weight: 10-20 parts of fluorosilicone oil, 5-8 parts of acrylate emulsion, 3-8 parts of fatty alcohol, 3-5 parts of oleic acid, 0.8-2.6 parts of a dispersing agent and the balance of polydimethylsiloxane. The interaction between the oleic acid and the fatty alcohol and other components in the defoaming agent effectively improves the defoaming performance, the foam inhibition performance, the dilution stability and the centrifugal stability of the defoaming agent.
Description
Technical Field
The invention relates to the technical field of defoaming agents, in particular to a safe and efficient defoaming agent and a preparation method thereof.
Background
The defoaming agent is one of the indispensable auxiliaries in many production at present. Has been widely applied to various fields such as chemical industry, food, textile, coating, petroleum, paper making, printing and dyeing and the like. The defoaming agents are various in kind and different in performance, and can be classified into mineral oil defoaming agents, polyether defoaming agents, silicone defoaming agents, polyether modified silicone defoaming agents and the like according to the composition. The polyether defoamer is non-toxic, odorless, good in water dispersion and strong in foam inhibition capacity, but is low in foam breaking rate, and cannot effectively extinguish a large amount of foam.
The stability of the existing defoaming agent cannot meet the use requirement, so that the safe and efficient defoaming agent with good stability and the preparation method thereof are needed to be provided.
Disclosure of Invention
The invention aims to provide a safe and efficient defoaming agent and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a safe and efficient defoaming agent comprises the following raw materials in parts by weight: 10-20 parts of fluorosilicone oil, 5-8 parts of acrylate emulsion, 3-8 parts of fatty alcohol, 3-5 parts of oleic acid, 0.8-2.6 parts of a dispersing agent and the balance of polydimethylsiloxane.
As a further scheme of the invention: the safe and efficient defoaming agent comprises the following raw materials in parts by weight: 13-17 parts of fluorosilicone oil, 6-7 parts of acrylate emulsion, 5-6 parts of fatty alcohol, 3.5-4.5 parts of oleic acid, 1.3-2.1 parts of a dispersing agent and the balance of polydimethylsiloxane.
As a still further scheme of the invention: the safe and efficient defoaming agent comprises the following raw materials in parts by weight: 15 parts of fluorosilicone oil, 6.5 parts of acrylic emulsion, 5.5 parts of fatty alcohol, 4 parts of oleic acid, 1.7 parts of a dispersing agent and the balance of polydimethylsiloxane.
As a still further scheme of the invention: the dispersing agent is one or more than two substances obtained by homopolymerization or copolymerization of one or more than two monomer units of alkenyl sulfonic acid, ethacrylic acid and acrylic acid.
Another object of the present invention is to provide a method for preparing a body, comprising the steps of:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 55-65 ℃;
s3: adding acrylic ester emulsion, fatty alcohol, oleic acid and a dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature at 110-160 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
As a further scheme of the invention: the method comprises the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 58-62 ℃;
s3: adding acrylic ester emulsion, fatty alcohol, oleic acid and a dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature at 130-140 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
As a still further scheme of the invention: the method comprises the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 60 ℃;
s3: adding the acrylic ester emulsion, the fatty alcohol, the oleic acid and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature to be 135 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
Compared with the prior art, the invention has the beneficial effects that: the interaction between the oleic acid and the fatty alcohol and other components in the defoaming agent effectively improves the defoaming performance, the foam inhibition performance, the dilution stability and the centrifugal stability of the defoaming agent.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
A safe and efficient defoaming agent comprises the following raw materials in parts by weight: 20 parts of fluorosilicone oil, 8 parts of acrylic emulsion, 8 parts of fatty alcohol, 5 parts of oleic acid, 2.6 parts of a dispersing agent and the balance of polydimethylsiloxane.
A safe and efficient preparation method of a defoaming agent comprises the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 65 ℃;
s3: adding the acrylic ester emulsion, the fatty alcohol, the oleic acid and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature at 160 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
The dispersing agent is one or more than two substances obtained by homopolymerization or copolymerization of one or more than two monomer units of alkenyl sulfonic acid, ethacrylic acid and acrylic acid.
Example 2
A safe and efficient defoaming agent comprises the following raw materials in parts by weight: 10 parts of fluorosilicone oil, 5 parts of acrylic emulsion, 3 parts of fatty alcohol, 3 parts of oleic acid, 0.8 part of dispersant and the balance of polydimethylsiloxane.
A safe and efficient preparation method of a defoaming agent comprises the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 55 ℃;
s3: adding the acrylic ester emulsion, the fatty alcohol, the oleic acid and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature at 110 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
The dispersing agent is one or more than two substances obtained by homopolymerization or copolymerization of one or more than two monomer units of alkenyl sulfonic acid, ethacrylic acid and acrylic acid.
Example 3
A safe and efficient defoaming agent comprises the following raw materials in parts by weight: 17 parts of fluorosilicone oil, 7 parts of acrylic emulsion, 6 parts of fatty alcohol, 4.5 parts of oleic acid, 2.1 parts of a dispersing agent and the balance of polydimethylsiloxane.
A safe and efficient preparation method of a defoaming agent comprises the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 58 ℃;
s3: adding the acrylic ester emulsion, the fatty alcohol, the oleic acid and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature at 130 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
The dispersing agent is one or more than two substances obtained by homopolymerization or copolymerization of one or more than two monomer units of alkenyl sulfonic acid, ethacrylic acid and acrylic acid.
Example 4
A safe and efficient defoaming agent comprises the following raw materials in parts by weight: 13 parts of fluorosilicone oil, 6 parts of acrylic emulsion, 5 parts of fatty alcohol, 3.5 parts of oleic acid, 1.3 parts of a dispersing agent and the balance of polydimethylsiloxane.
A safe and efficient preparation method of a defoaming agent comprises the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 62 ℃;
s3: adding the acrylic ester emulsion, the fatty alcohol, the oleic acid and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature to be 140 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
The dispersing agent is one or more than two substances obtained by homopolymerization or copolymerization of one or more than two monomer units of alkenyl sulfonic acid, ethacrylic acid and acrylic acid.
Example 5
A safe and efficient defoaming agent comprises the following raw materials in parts by weight: 15 parts of fluorosilicone oil, 6.5 parts of acrylic emulsion, 5.5 parts of fatty alcohol, 4 parts of oleic acid, 1.7 parts of a dispersing agent and the balance of polydimethylsiloxane.
A safe and efficient preparation method of a defoaming agent comprises the following steps:
s1: preparing all produced raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing the raw materials in a sealed container;
s2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 60 ℃;
s3: adding the acrylic ester emulsion, the fatty alcohol, the oleic acid and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature to be 135 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
The dispersing agent is one or more than two substances obtained by homopolymerization or copolymerization of one or more than two monomer units of alkenyl sulfonic acid, ethacrylic acid and acrylic acid.
Comparative example 1
A safe and efficient defoaming agent comprises the following raw materials in parts by weight: 15 parts of fluorosilicone oil, 6.5 parts of acrylic emulsion, 5.5 parts of fatty alcohol, 1.7 parts of a dispersing agent and the balance of polydimethylsiloxane.
A safe and efficient preparation method of a defoaming agent comprises the following steps:
s1: preparing all produced raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing the raw materials in a sealed container;
s2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 60 ℃;
s3: adding the acrylic ester emulsion, the fatty alcohol and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature to be 135 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
The dispersant was the same material as used in example 5.
Comparative example 2
A safe and efficient defoaming agent comprises the following raw materials in parts by weight: 15 parts of fluorosilicone oil, 6.5 parts of acrylate emulsion, 1.7 parts of oleic acid and a dispersant, and the balance of polydimethylsiloxane.
A safe and efficient preparation method of a defoaming agent comprises the following steps:
s1: preparing all produced raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing the raw materials in a sealed container;
s2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 60 ℃;
s3: adding the acrylic ester emulsion, the oleic acid and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature to be 135 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
The dispersant was the same material as used in example 5.
Comparative example 3
A safe and efficient defoaming agent comprises the following raw materials in parts by weight: 15 parts of fluorosilicone oil, 6.5 parts of acrylic emulsion, 1.7 parts of a dispersing agent and the balance of polydimethylsiloxane.
A safe and efficient preparation method of a defoaming agent comprises the following steps:
s1: preparing all produced raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing the raw materials in a sealed container;
s2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 60 ℃;
s3: adding the acrylic ester emulsion and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature to be 135 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
The dispersant was the same material as used in example 5.
Performance test
The defoaming agents prepared in examples 1 to 5 and those in comparative examples 1 to 3 were subjected to performance tests according to the following test methods.
(1) Defoaming and foam suppressing properties: a Roche foam tester is adopted to test defoaming performance and foam inhibition performance, and the specific method comprises the following steps:
adding 200mL of 2 mass percent sodium dodecyl sulfate foaming liquid into a 1000mL measuring cylinder, keeping the temperature to 25 ℃, then inserting a blowing pipe into the bottom of the measuring cylinder, introducing nitrogen at the speed of 3L/min until the foam height reaches 800mL, stopping bubbling, immediately adding 1mL of defoaming agent diluted by 30 times, and recording the time when the foam falls to 50mL by using a stopwatch, wherein the time is the defoaming time. The shorter the defoaming time, the better the defoaming performance of the defoaming agent.
After the defoaming performance test is finished, a switch is turned on, nitrogen is introduced at the speed of 3L/min, the time is recorded by a stopwatch, and the time when the foam height rises to 800mL is the foam inhibition time. The longer the foam inhibition time, the better the foam inhibition performance of the defoamer.
(2) Dilution stability: dropping a drop of defoamer emulsion into a beaker filled with deionized water, slightly oscillating, observing whether the defoamer emulsion is layered or demulsified, and sequentially marking as excellent (the emulsion is rapidly dispersed, and the liquid surface has no oily substance), good (the emulsion is rapidly dispersed, and the liquid surface has no oily substance), medium (the emulsion is slowly dispersed, and a little floccule is on the liquid surface), and poor (the emulsion is not easily dispersed, and the floccule is difficult to disappear) according to the dispersion condition in water.
(3) Centrifugal stability: diluting the defoaming agent emulsion by 5 times with deionized water, placing in a centrifuge tube, centrifuging at 3000r/min with a high-speed centrifuge, stopping the centrifuge for observation once every 5min, and recording the layering time.
The natural storage stability time of the defoaming agent as a commodity is more than 6 months, and the emulsion is not layered after being centrifuged at 3000r/min for 30 min.
The test results were as follows:
TABLE 1 results of performance testing of defoamers in examples 1 to 5
As can be seen from the test results in Table 1, the mineral oil defoamers prepared in examples 1 to 6 of the present invention all had superior defoaming performance, foam suppressing performance, dilution stability and centrifugal stability to the defoamers of comparative examples 1 to 2 and the two commercially available polyether-modified silicon defoamers.
As can be seen from the experimental results of comparative examples 1 to 5 and comparative examples 1 to 3, the defoaming agents prepared in examples 1 to 5 are superior in defoaming property, foam suppressing property, dilution stability and centrifugal stability to those of comparative examples 1 to 3, comparative example 1 is different from example 5 in that oleic acid is not contained, comparative example 2 is different from example 5 in that fatty alcohol is not contained, and comparative example 2 is different from example 5 in that oleic acid and fatty alcohol are not contained; the comparison shows that the single or total lack of oleic acid and fatty alcohol has great influence on the performance of the defoaming agent, the oleic acid plays a role in improving the stability, but the interaction between the oleic acid and the fatty alcohol and other components in the defoaming agent effectively improves the performance of the defoaming agent.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. The safe and efficient defoaming agent is characterized by comprising the following raw materials in parts by weight: 10-20 parts of fluorosilicone oil, 5-8 parts of acrylate emulsion, 3-8 parts of fatty alcohol, 3-5 parts of oleic acid, 0.8-2.6 parts of a dispersing agent and the balance of polydimethylsiloxane.
2. The safe and efficient defoaming agent according to claim 1, wherein the safe and efficient defoaming agent comprises the following raw materials in parts by weight: 13-17 parts of fluorosilicone oil, 6-7 parts of acrylate emulsion, 5-6 parts of fatty alcohol, 3.5-4.5 parts of oleic acid, 1.3-2.1 parts of a dispersing agent and the balance of polydimethylsiloxane. A stabilizer.
3. The safe and efficient defoaming agent according to claim 1, wherein the safe and efficient defoaming agent comprises the following raw materials in parts by weight: 15 parts of fluorosilicone oil, 6.5 parts of acrylic emulsion, 5.5 parts of fatty alcohol, 4 parts of oleic acid, 1.7 parts of a dispersing agent and the balance of polydimethylsiloxane.
4. The safe and efficient defoaming agent according to any one of claims 1 to 3, wherein the dispersing agent is one or more of materials obtained by homopolymerization or copolymerization of one or more monomer units selected from alkenyl sulfonic acid, ethacrylic acid and acrylic acid.
5. A method for preparing the safe and high-efficiency antifoaming agent according to claim 4, comprising the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 55-65 ℃;
s3: adding acrylic ester emulsion, fatty alcohol, oleic acid and a dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature at 110-160 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
6. The method for preparing the safe and efficient defoaming agent according to claim 4 is characterized by comprising the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 58-62 ℃;
s3: adding acrylic ester emulsion, fatty alcohol, oleic acid and a dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature at 130-140 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
7. The method for preparing the safe and efficient defoaming agent according to claim 4 is characterized by comprising the following steps:
s1: preparing all raw materials, taking out all raw materials, weighing according to a certain weight, taking out raw materials with fixed weight, and storing in a sealed container
S2: displacing air in the polymerization kettle with nitrogen, vacuumizing, flushing with nitrogen for protection, adding fluorosilicone oil and polydimethylsiloxane into the reaction kettle, stirring and mixing, and heating to 60 ℃;
s3: adding the acrylic ester emulsion, the fatty alcohol, the oleic acid and the dispersing agent into the reaction kettle, mixing and stirring, and controlling the reaction temperature to be 135 ℃;
s4: after the reaction is finished, starting an air compressor to press the materials into a filter for filtering, wherein the filtrate is the finished product defoamer.
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Application publication date: 20210910 |