CN109224536A - A kind of preparation method for the defoaming agent that stability is good - Google Patents
A kind of preparation method for the defoaming agent that stability is good Download PDFInfo
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- CN109224536A CN109224536A CN201810868469.5A CN201810868469A CN109224536A CN 109224536 A CN109224536 A CN 109224536A CN 201810868469 A CN201810868469 A CN 201810868469A CN 109224536 A CN109224536 A CN 109224536A
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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
-
- 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
-
- 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
- B01D19/0413—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing N-atoms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
Abstract
The invention discloses a kind of preparation method of the good defoaming agent of stability, include the following steps: that the preparation of (1) defoaming function auxiliary agent, (2) raw material weigh spare, (3) finished product preparation.Present invention improves the preparation method of defoaming agent, each step collocation is reasonable, easy to promote and utilize, and rapidly, foam inhibition ability is strong, and using stay in grade, overall characteristic is good, the great market competitiveness and productivity effect for defoaming agent defoaming obtained.
Description
Technical field
The invention belongs to defoaming agent processing technique fields, and in particular to a kind of preparation method for the defoaming agent that stability is good.
Background technique
Defoaming agent, also known as defrother or foamicide can generate many foams for influencing production during industrial production,
It needs to add defoaming agent.It is widely used in removing latex, textile sizing, food fermentation, biological medicine, coating, petrochemical industry, makes
The unwanted bubbles generated during the industry productions such as paper, industry cleaning link, sewage treatment.But the defoaming of the raw production and sales in existing market
It the problems such as agent, most that there is qualities is unstable, defoaming treatment less effective, needs to be improved.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of preparation method of defoaming agent that stability is good is provided.
The present invention is achieved by the following technical solutions:
A kind of preparation method for the defoaming agent that stability is good, includes the following steps:
(1) prepared by defoaming function auxiliary agent:
A. first agricultural crop straw is put into pulverizer and carries out pulverization process, take out after the completion stalk crushed material is spare；
B. it the resulting stalk crushed material of a will be operated is put into steam blasting tank and carry out Steam explosion treatment, take out after the completion standby
With；
C. attapulgite is put into calcining furnace and carries out calcination processing, taken out after 1 ~ 2h spare；
D. starch, water are carried out mixing according to weight ratio 1:6 ~ 7 to be put into reaction kettle, the temperature in heating holding reaction kettle is
78 ~ 83 DEG C, after being stirred continuously 42 ~ 46min of processing, then the phosphoric acid solution of its gross mass 1 ~ 1.5% is added dropwise into reaction kettle, constantly
After 1.2 ~ 1.6h of stir process, taking-up, which is poured into ethyl alcohol, to be precipitated, and after then being rinsed one time with deionized water, is taken out using vacuum
It is spare that reactant A is obtained after filter, drying and processing；
E. the resulting reactant A of d will be operated to be put into reaction kettle, be then added its gross mass 1600 ~ 1800% water, 2.5 ~
3.5% ammonium persulfate, 140 ~ 150% styrene, 170 ~ 180% Butyl Acrylate Monomer, 7 ~ 9% chitosan, 8 ~ 12%
Dodecyldimethylamine oxide, 280 ~ 320% operation c treated attapulgite, then heating keeps the temperature in reaction kettle
Degree be 73 ~ 78 DEG C, after being stirred continuously 4 ~ 6h of processing, take out reactant B is spare；Reactant B obtained is a kind of chitosan etc.
The compound attapulgite particle solution of the modified starch-grafted styrene/acrylic acrylate copolymer of hydrolysis, this particle have very
High surface-active and adsorption capacity is capable of the foam of abolishing of efficient stable, the subsequent filling-modified inside in biological carbon, into one
Step improves the stability that defoaming is assisted；
It f. will be in operation b treated stalk crushed material the is immersed in operation resulting reactant B of e, after ultrasonic vibration handles 3 ~ 5h
Stalk crushed material is filtered out spare；
G. will operation f treated that stalk crushed material is put into carbide furnace carries out carbonization treatment, take out and smash it through after 2 ~ 4h
200 mesh are spare up to defoaming function auxiliary agent；
(2) raw material weighs spare:
It is spare that following raw materials according is weighed by corresponding parts by weight: 10 ~ 15 parts of amido silicon oils, 14 ~ 18 parts of emulsifiers, 20 ~ 25 parts of poly- second two
Alcohol, 12 ~ 16 parts of n-amyl alcohols, 3 ~ 6 parts of ethylene bis stearamides, the resulting defoaming function auxiliary agent of 8 ~ 12 parts of steps (1), 400 ~ 450
Part deionized water；
(3) prepared by finished product:
The weighed all material compositions of step (2) are put into agitator tank jointly, high-speed stirred is uniformly taken out afterwards and got product
Defoaming agent.
Further, the concrete operations of Steam explosion treatment described in step (1) operation b are: first to steam blasting tank
It is inside passed through temperature and is 102 ~ 106 DEG C of vapor, and the pressure in steam blasting tank is increased into 0.4 ~ 0.45MPa, heat-insulation pressure keeping
After handling 10 ~ 12min, it will be unloaded in steam blasting tank to normal temperature and pressure in 40s.
Further, temperature when calcination processing described in step (1) operation c in control calcining furnace is 800 ~ 850 DEG C.
Further, the mass fraction of phosphoric acid solution described in step (1) operation d is 16 ~ 19%.
Further, nitrogen environment is remained in reaction kettle described in step (1) operation e.
Further, the frequency of ultrasonic wave is 500 ~ 550kHz when ultrasonic vibration processing described in step (1) operation f.
Further, it is 280 ~ 300 DEG C that the temperature in carbide furnace is kept when carbonization treatment described in step (1) operation g.
Further, emulsifier described in step (2) is nonylphenol polyoxyethylene ether, alkyl phenol polyoxyethylene ether, benzyl
Any one in base phenol polyethenoxy ether.
Further, the revolving speed of high-speed stirred described in step (3) is 2200 ~ 2400 revs/min.
Present invention improves the preparation methods of defoaming agent, the use quality of defoaming agent are effectively improved, in preparation process
In be especially added to a kind of special defoaming function auxiliary component, be a kind of with agricultural crop straw be at main Raw material processing
Modification biological carbon component obtained by reason, agricultural crop straw would generally be incinerated or returning to the field, and the utilization rate of two ways is bad, this
Invention has carried out the utilization of new paragon to agricultural crop straw, improves the utilization rate of substance, and agricultural crop straw used can be big
Beanstalk stalk, corn stover, cotton stalk etc. have carried out Steam explosion treatment to the crushed material of agricultural crop straw in processing, have had
Its loose institutional framework of effect, increases fibre gap, improves specific surface area and adsorption capacity, establishes for subsequent processing
Basis to stalk crushed material carries out immersion modification with the reactant B of preparation again later, concave convex rod is permeated with into it
The ingredients such as soil, most afterwards through carbonization treatment, stalk crushed material forms biological carbon, and realizes the attapulgite in the reactant B penetrated into
Equal ingredients complete the deep modification to biological carbon, and final defoaming function auxiliary component obtained can be obviously improved defoaming
Effect and efficiency improve the stability of disposed of in its entirety.
The present invention has the advantage that compared with prior art
Present invention improves the preparation method of defoaming agent, each step collocation is reasonable, easy to promote and utilize, defoaming agent defoaming obtained
Rapidly, foam inhibition ability is strong, and using stay in grade, overall characteristic is good, the great market competitiveness and productivity effect.
Specific embodiment
Embodiment 1
A kind of preparation method for the defoaming agent that stability is good, includes the following steps:
(1) prepared by defoaming function auxiliary agent:
A. first agricultural crop straw is put into pulverizer and carries out pulverization process, take out after the completion stalk crushed material is spare；
B. it the resulting stalk crushed material of a will be operated is put into steam blasting tank and carry out Steam explosion treatment, take out after the completion standby
With；
C. attapulgite is put into calcining furnace and carries out calcination processing, taken out after 1h spare；
D. starch, water are carried out mixing according to weight ratio 1:6 to be put into reaction kettle, it is 78 that heating, which keeps the temperature in reaction kettle,
DEG C, it is stirred continuously after handling 42min, then the phosphoric acid solution of its gross mass 1% is added dropwise into reaction kettle, is stirred continuously processing 1.2h
Afterwards, take out and pour into ethyl alcohol and precipitates, after then being rinsed one time with deionized water, using after vacuum filtration, drying and processing instead
Answer object A spare；
E. the resulting reactant A of d will be operated to be put into reaction kettle, the water of its gross mass 1600%, 2.5% over cure is then added
Sour ammonium, 140% styrene, 170% Butyl Acrylate Monomer, 7% chitosan, 8% dodecyldimethylamine oxide,
280% operation c treated attapulgite, it is 73 DEG C that then heating, which keeps the temperature in reaction kettle, is stirred continuously processing 4h
Afterwards, take out reactant B is spare；
F. will be in operation b treated stalk crushed material the is immersed in operation resulting reactant B of e, ultrasonic vibration will after handling 3h
Stalk crushed material filters out spare；
G. will operation f treated that stalk crushed material is put into carbide furnace carries out carbonization treatment, taken out after 2h and smash it through 200
Mesh is spare up to defoaming function auxiliary agent；
(2) raw material weighs spare:
It is spare to weigh following raw materials according by corresponding parts by weight: 10 parts of amido silicon oils, 14 parts of emulsifiers, 20 parts of polyethylene glycol, 12 parts just
Amylalcohol, 3 parts of ethylene bis stearamides, the resulting defoaming function auxiliary agent of 8 parts of steps (1), 400 parts of deionized waters；
(3) prepared by finished product:
The weighed all material compositions of step (2) are put into agitator tank jointly, high-speed stirred is uniformly taken out afterwards and got product
Defoaming agent.
Further, the concrete operations of Steam explosion treatment described in step (1) operation b are: first to steam blasting tank
It is inside passed through the vapor that temperature is 102 DEG C, and the pressure in steam blasting tank is increased into 0.4MPa, heat-insulation pressure keeping handles 10min
Afterwards, it will be unloaded in steam blasting tank to normal temperature and pressure in 40s.
Further, temperature when calcination processing described in step (1) operation c in control calcining furnace is 800 DEG C.
Further, the mass fraction of phosphoric acid solution described in step (1) operation d is 16%.
Further, nitrogen environment is remained in reaction kettle described in step (1) operation e.
Further, the frequency of ultrasonic wave is 500kHz when ultrasonic vibration processing described in step (1) operation f.
Further, it is 280 DEG C that the temperature in carbide furnace is kept when carbonization treatment described in step (1) operation g.
Further, emulsifier described in step (2) is nonylphenol polyoxyethylene ether.
Further, the revolving speed of high-speed stirred described in step (3) is 2200 revs/min.
Embodiment 2
A kind of preparation method for the defoaming agent that stability is good, includes the following steps:
(1) prepared by defoaming function auxiliary agent:
A. first agricultural crop straw is put into pulverizer and carries out pulverization process, take out after the completion stalk crushed material is spare；
B. it the resulting stalk crushed material of a will be operated is put into steam blasting tank and carry out Steam explosion treatment, take out after the completion standby
With；
C. attapulgite is put into calcining furnace and carries out calcination processing, taken out after 1.5h spare；
D. starch, water are carried out mixing according to weight ratio 1:6.6 to be put into reaction kettle, the temperature in heating holding reaction kettle is
It 80 DEG C, is stirred continuously after handling 44min, then the phosphoric acid solution of its gross mass 1.3% is added dropwise into reaction kettle, be stirred continuously processing
After 1.4h, taking-up, which is poured into ethyl alcohol, to be precipitated, after then being rinsed one time with deionized water, after vacuum filtration, drying and processing
It is spare to obtain reactant A；
E. the resulting reactant A of d will be operated to be put into reaction kettle, the water of its gross mass 1700%, 3% persulfuric acid is then added
Ammonium, 145% styrene, 176% Butyl Acrylate Monomer, 8% chitosan, 10% dodecyldimethylamine oxide,
300% operation c treated attapulgite, it is 75 DEG C that then heating, which keeps the temperature in reaction kettle, is stirred continuously processing 5h
Afterwards, take out reactant B is spare；
F. will be in operation b treated stalk crushed material the is immersed in operation resulting reactant B of e, ultrasonic vibration will after handling 4h
Stalk crushed material filters out spare；
G. will operation f treated that stalk crushed material is put into carbide furnace carries out carbonization treatment, taken out after 3h and smash it through 200
Mesh is spare up to defoaming function auxiliary agent；
(2) raw material weighs spare:
It is spare to weigh following raw materials according by corresponding parts by weight: 13 parts of amido silicon oils, 16 parts of emulsifiers, 22 parts of polyethylene glycol, 14 parts just
Amylalcohol, 5 parts of ethylene bis stearamides, the resulting defoaming function auxiliary agent of 10 parts of steps (1), 430 parts of deionized waters；
(3) prepared by finished product:
The weighed all material compositions of step (2) are put into agitator tank jointly, high-speed stirred is uniformly taken out afterwards and got product
Defoaming agent.
Further, the concrete operations of Steam explosion treatment described in step (1) operation b are: first to steam blasting tank
It is inside passed through the vapor that temperature is 104 DEG C, and the pressure in steam blasting tank is increased into 0.43MPa, heat-insulation pressure keeping handles 11min
Afterwards, it will be unloaded in steam blasting tank to normal temperature and pressure in 40s.
Further, temperature when calcination processing described in step (1) operation c in control calcining furnace is 830 DEG C.
Further, the mass fraction of phosphoric acid solution described in step (1) operation d is 18%.
Further, nitrogen environment is remained in reaction kettle described in step (1) operation e.
Further, the frequency of ultrasonic wave is 520kHz when ultrasonic vibration processing described in step (1) operation f.
Further, it is 290 DEG C that the temperature in carbide furnace is kept when carbonization treatment described in step (1) operation g.
Further, emulsifier described in step (2) is alkyl phenol polyoxyethylene ether.
Further, the revolving speed of high-speed stirred described in step (3) is 2300 revs/min.
Embodiment 3
A kind of preparation method for the defoaming agent that stability is good, includes the following steps:
(1) prepared by defoaming function auxiliary agent:
A. first agricultural crop straw is put into pulverizer and carries out pulverization process, take out after the completion stalk crushed material is spare；
B. it the resulting stalk crushed material of a will be operated is put into steam blasting tank and carry out Steam explosion treatment, take out after the completion standby
With；
C. attapulgite is put into calcining furnace and carries out calcination processing, taken out after 2h spare；
D. starch, water are carried out mixing according to weight ratio 1:7 to be put into reaction kettle, it is 83 that heating, which keeps the temperature in reaction kettle,
DEG C, it is stirred continuously after handling 46min, then the phosphoric acid solution of its gross mass 1.5% is added dropwise into reaction kettle, is stirred continuously processing
After 1.6h, taking-up, which is poured into ethyl alcohol, to be precipitated, after then being rinsed one time with deionized water, after vacuum filtration, drying and processing
It is spare to obtain reactant A；
E. the resulting reactant A of d will be operated to be put into reaction kettle, the water of its gross mass 1800%, 3.5% over cure is then added
Sour ammonium, 150% styrene, 180% Butyl Acrylate Monomer, 9% chitosan, 12% dodecyldimethylamine oxide,
320% operation c treated attapulgite, it is 78 DEG C that then heating, which keeps the temperature in reaction kettle, is stirred continuously processing 6h
Afterwards, take out reactant B is spare；
F. will be in operation b treated stalk crushed material the is immersed in operation resulting reactant B of e, ultrasonic vibration will after handling 5h
Stalk crushed material filters out spare；
G. will operation f treated that stalk crushed material is put into carbide furnace carries out carbonization treatment, taken out after 4h and smash it through 200
Mesh is spare up to defoaming function auxiliary agent；
(2) raw material weighs spare:
It is spare to weigh following raw materials according by corresponding parts by weight: 15 parts of amido silicon oils, 18 parts of emulsifiers, 25 parts of polyethylene glycol, 16 parts just
Amylalcohol, 6 parts of ethylene bis stearamides, the resulting defoaming function auxiliary agent of 12 parts of steps (1), 450 parts of deionized waters；
(3) prepared by finished product:
The weighed all material compositions of step (2) are put into agitator tank jointly, high-speed stirred is uniformly taken out afterwards and got product
Defoaming agent.
Further, the concrete operations of Steam explosion treatment described in step (1) operation b are: first to steam blasting tank
It is inside passed through the vapor that temperature is 106 DEG C, and the pressure in steam blasting tank is increased into 0.45MPa, heat-insulation pressure keeping handles 12min
Afterwards, it will be unloaded in steam blasting tank to normal temperature and pressure in 40s.
Further, temperature when calcination processing described in step (1) operation c in control calcining furnace is 850 DEG C.
Further, the mass fraction of phosphoric acid solution described in step (1) operation d is 19%.
Further, nitrogen environment is remained in reaction kettle described in step (1) operation e.
Further, the frequency of ultrasonic wave is 550kHz when ultrasonic vibration processing described in step (1) operation f.
Further, it is 300 DEG C that the temperature in carbide furnace is kept when carbonization treatment described in step (1) operation g.
Further, emulsifier described in step (2) is Ben-zylphenol Polyoxyethyl Ether.
Further, the revolving speed of high-speed stirred described in step (3) is 2400 revs/min.
Comparative example 1
This comparative example 1 compared with Example 2, in the preparation of step (1) defoaming function auxiliary agent, eliminates the place of operation c ~ f
Reason operation, method and step in addition to this are all the same.
Comparative example 2
Compared with Example 2, in step (2), raw material weighs in spare this comparative example 2, eliminates that step (1) is resulting to disappear
Function additive ingredient is steeped, method and step in addition to this is all the same.
Control group
Existing commercially available organic silicon defoamer.
It is corresponding to above-described embodiment 2, comparative example 1, comparative example 2, control group in order to compare effect of the present invention
Defoaming agent is tested for the property by professional standard, and specific correlation data is as shown in table 1 below:
Table 1
The defoaming agent made from the method for the present invention it can be seen from upper table 1 is comprehensive good using quality, effect stability, and great market is competing
Strive power and productivity effect.
Claims (9)
1. a kind of preparation method of the good defoaming agent of stability, which comprises the steps of:
(1) prepared by defoaming function auxiliary agent:
A. first agricultural crop straw is put into pulverizer and carries out pulverization process, take out after the completion stalk crushed material is spare；
B. it the resulting stalk crushed material of a will be operated is put into steam blasting tank and carry out Steam explosion treatment, take out after the completion standby
With；
C. attapulgite is put into calcining furnace and carries out calcination processing, taken out after 1 ~ 2h spare；
D. starch, water are carried out mixing according to weight ratio 1:6 ~ 7 to be put into reaction kettle, the temperature in heating holding reaction kettle is
78 ~ 83 DEG C, after being stirred continuously 42 ~ 46min of processing, then the phosphoric acid solution of its gross mass 1 ~ 1.5% is added dropwise into reaction kettle, constantly
After 1.2 ~ 1.6h of stir process, taking-up, which is poured into ethyl alcohol, to be precipitated, and after then being rinsed one time with deionized water, is taken out using vacuum
It is spare that reactant A is obtained after filter, drying and processing；
E. the resulting reactant A of d will be operated to be put into reaction kettle, be then added its gross mass 1600 ~ 1800% water, 2.5 ~
3.5% ammonium persulfate, 140 ~ 150% styrene, 170 ~ 180% Butyl Acrylate Monomer, 7 ~ 9% chitosan, 8 ~ 12%
Dodecyldimethylamine oxide, 280 ~ 320% operation c treated attapulgite, then heating keeps the temperature in reaction kettle
Degree be 73 ~ 78 DEG C, after being stirred continuously 4 ~ 6h of processing, take out reactant B is spare；
It f. will be in operation b treated stalk crushed material the is immersed in operation resulting reactant B of e, after ultrasonic vibration handles 3 ~ 5h
Stalk crushed material is filtered out spare；
G. will operation f treated that stalk crushed material is put into carbide furnace carries out carbonization treatment, take out and smash it through after 2 ~ 4h
200 mesh are spare up to defoaming function auxiliary agent；
(2) raw material weighs spare:
It is spare that following raw materials according is weighed by corresponding parts by weight: 10 ~ 15 parts of amido silicon oils, 14 ~ 18 parts of emulsifiers, 20 ~ 25 parts of poly- second two
Alcohol, 12 ~ 16 parts of n-amyl alcohols, 3 ~ 6 parts of ethylene bis stearamides, the resulting defoaming function auxiliary agent of 8 ~ 12 parts of steps (1), 400 ~ 450
Part deionized water；
(3) prepared by finished product:
The weighed all material compositions of step (2) are put into agitator tank jointly, high-speed stirred is uniformly taken out afterwards and got product
Defoaming agent.
2. a kind of preparation method of the good defoaming agent of stability according to claim 1, which is characterized in that step (1) behaviour
The concrete operations for making Steam explosion treatment described in b are: being first passed through the water that temperature is 102 ~ 106 DEG C into steam blasting tank and steam
Gas, and the pressure in steam blasting tank is increased into 0.4 ~ 0.45MPa, after heat-insulation pressure keeping handles 10 ~ 12min, it will be steamed in 40s
It is unloaded in vapour cavity charge containers to normal temperature and pressure.
3. a kind of preparation method of the good defoaming agent of stability according to claim 1, which is characterized in that step (1) behaviour
Temperature when making calcination processing described in c in control calcining furnace is 800 ~ 850 DEG C.
4. a kind of preparation method of the good defoaming agent of stability according to claim 1, which is characterized in that step (1) behaviour
The mass fraction for making phosphoric acid solution described in d is 16 ~ 19%.
5. a kind of preparation method of the good defoaming agent of stability according to claim 1, which is characterized in that step (1) behaviour
Make to remain nitrogen environment in reaction kettle described in e.
6. a kind of preparation method of the good defoaming agent of stability according to claim 1, which is characterized in that step (1) behaviour
The frequency of ultrasonic wave is 500 ~ 550kHz when making the processing of ultrasonic vibration described in f.
7. a kind of preparation method of the good defoaming agent of stability according to claim 1, which is characterized in that step (1) behaviour
Make to keep the temperature in carbide furnace when carbonization treatment described in g to be 280 ~ 300 DEG C.
8. a kind of preparation method of the good defoaming agent of stability according to claim 1, which is characterized in that in step (2)
The emulsifier is nonylphenol polyoxyethylene ether, alkyl phenol polyoxyethylene ether, any one in Ben-zylphenol Polyoxyethyl Ether.
9. a kind of preparation method of the good defoaming agent of stability according to claim 1, which is characterized in that in step (3)
The revolving speed of the high-speed stirred is 2200 ~ 2400 revs/min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054284A (en) * | 2019-12-06 | 2020-04-24 | 江苏四新科技应用研究所股份有限公司 | Method for preparing spherical solid defoaming agent through micro-channel |
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| CN111054284A (en) * | 2019-12-06 | 2020-04-24 | 江苏四新科技应用研究所股份有限公司 | Method for preparing spherical solid defoaming agent through micro-channel |
| CN111054284B (en) * | 2019-12-06 | 2021-04-30 | 江苏四新科技应用研究所股份有限公司 | Method for preparing spherical solid defoaming agent through micro-channel |
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