CN104771939B - It is a kind of for mineral oil antifoam agent of black liquid and preparation method thereof - Google Patents
It is a kind of for mineral oil antifoam agent of black liquid and preparation method thereof Download PDFInfo
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- CN104771939B CN104771939B CN201510096290.9A CN201510096290A CN104771939B CN 104771939 B CN104771939 B CN 104771939B CN 201510096290 A CN201510096290 A CN 201510096290A CN 104771939 B CN104771939 B CN 104771939B
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Abstract
The present invention relates to a kind of for mineral oil antifoam agent of black liquid and preparation method thereof, by introducing a kind of end capped polyether step by step in the carrier, introduce another end capped polyether again afterwards, obtained defoamer, both avoided viscosity is excessive from being unfavorable for disperseing, the Tall oil clearance in black liquid is favorably improved again, so as to reduce adhesion of the Tall oil to equipment and screen cloth, the operational efficiency of equipment is also improved therewith, at the same time, antifoaming performance and storage stability are also improved, be particularly suitable for use in high temperature alkali system.
Description
Technical field
The present invention relates to a kind of mineral oil antifoam agent for the Tall oil extracted amount being favorably improved in black liquid, defoamer
Belong to fine chemistry preparation, therefore the present invention is under the jurisdiction of technical field of fine chemical preparations.
Background technology
Defoamer is a kind of fine chemicals additive, and major function includes two aspects of froth breaking and suds, and one good
Defoamer requires there is excellent compatibility between other auxiliary agents in addition to itself will possess excellent antifoaming performance, also,
And the stability of bubbling system is not influenceed.
Defoamer is broadly divided into organic silicon defoamer and antifoaming agent of non-silicone, organosilicon froth breaking from froth breaking key component
Agent has that addition is few, surface tension is low, without physiologically active, it is safe the features such as, but in some cases, low surface tension
With good spreading property on the contrary into the shortcoming of organic silicon defoamer, this is due to once after organosilicon demulsification, easily in table
Face forms silicon spot or causes pump to block, so as to directly affect the performance of system；In the system of some harsh conditions, such as high temperature is strong
In the black liquid of alkali, it appears especially prominent.Therefore it is in these systems to use antifoaming agent of non-silicone more.On black liquid
The introduction of middle use defoamer is a lot, and Publication No. CN102266681A patent describes a kind of substitution conventional mineral oil froth breaking
The polyether antifoam agent that agent is used in black liquid, its antifoaming performance is good and storage stability is good, but weak point is it
Cost price is high；CN101991975A is described one kind and lived using fatty acid metal soap, fatty acid amide and white carbon as froth breaking
Property thing mineral oil antifoam agent, the method that polyethers is mixed as antifoam additives, by changing froth breaking material in mineral oil improves
Antifoaming performance and stability；CN101638871A is related to a kind of novel papermaking wet part deformer, using fatty acid methyl ester as rise
Beginning agent synthesizing fatty acid methyl ester polyethers, plus a small amount of natural oil, solve defoamer froth breaking and out gassing under the high temperature conditions
Can not be good the problem of, but its cost is also higher.
In sulfate pulping, grease and resin component in timber become soap under alkali effect and are dissolved in black liquor,
Namely sulfate soap, Tall oil is produced after acidifying.Tall oil is important grease and rosin source, and wherein fatty acid part can
To replace drying oil and semi-drying oil, resin acid moieties can be used as gum rosin as steam distilled rosin.Tall oil can be used for
Coating, plasticizer, pitch articles, petroleum industry, rubber industry, paper-making sizing, printing-ink, the binding agent of cement, lotion,
In terms of floating separation agent, casting mold cement.Therefore, the extraction of Tall oil can produce larger economic benefit.But, if black
Tall oil soap in liquid flocks together, and on the one hand certain influence can be produced to the quality of paper, on the other hand to sulfate
Recovery process and follow-up papermaking process produce a series of operation influence, such as paper machine foaming, fouling of evaporator, formation pitch,
Have virose RA rosin acid in factory's effluent and aggravate wastewater treatment difficulty.Although the above-mentioned defoamer referred to is applicable
In black liquid, but cost is high, and does not refer to raising tall oil soap separation yield, and CN101589134A describe it is a kind of to
It is RO [(CH that formula is added in black liquor2CHCH3O)x(CH2CH2O)y] M block alkyl alcohol alkoxylates and combinations thereof carry
The method of high tall oil soap separation yield, wherein M is hydrogen or alkali metal, but the polyethers blocked with H or alkali metal can not be played
Disappear foam-inhibiting effect well.
The content of the invention
The antifoaming system of the present invention, by introducing a kind of end capped polyether step by step in the carrier, introduces another envelope again afterwards
Polyethers is held, obtained defoamer had both avoided the problem of viscosity is excessive to be unfavorable for scattered, the tower in black liquid is favorably improved again
Sieve oil clearance, so as to reduce adhesion of the Tall oil to equipment and screen cloth, improves the operational efficiency and product of equipment therewith
The rate of sizing and wash degree, at the same time, also improve antifoaming performance and storage stability, and be particularly suitable for use in high temperature highly basic body
System.
The defoamer of the present invention mainly includes following components：
A. carrier
Carrier is mineral oil, selected from kerosene, diesel oil, soybean oil, white oil, heavy oil, machinery oil, naphthenic oil, alkylbenzene, preferably
Machinery oil.Mineral oil kinematic viscosity (40 DEG C) scope of the present invention is 10~200mpa.s, and consumption is defoamer gross mass
60~80%.
B. as with the modified polyether for improving Tall oil recovery rate, its formula is RO (EO)x(PO)yR ', wherein x are 5
~40, y are straight or branched alkyl, alkylene, the cycloalkyl that 1~15, R is carbon number 8~24, and R ' is carbon number 1~4
Straight or branched alkyl.End capped polyether consumption is the 5~15% of defoamer gross mass.
C. as the modified polyether that synergy is played with end capped polyether described in B, its formula is R " O (EO)m(PO)nR " ', its
Middle m is that 2~10, n is that 10~20, R " is the alkyl of carbon number 2~4, alkylene, R " ' be carbon number 1~4 straight chain or
Branched alkyl.End capped polyether consumption is the 5~10% of defoamer gross mass.
D. wax
Wax is as the hydrophobic particles for taking into account antifoam performance and stability, selected from vegetable wax, animal wax, mineral wax, synthetic wax.
Vegetable wax mixes thing, including Brazil wax, wooden chaff wax, sugarcane wax, laurel wax for the esters of higher fatty acids and high alcohol；
Animal wax includes insect wax, beeswax, spermaceti, lanocerin；Mineral wax includes paraffin, lignite wax；Synthetic wax includes Fischer-Tropsch wax, polyethylene
Wax, polypropylene wax, OPE, ethane-acetic acid ethyenyl copolymerization wax.Preferably synthetic wax.Consumption is generally the total matter of defoamer
The 2~6% of amount.
E. emulsifying agent
Emulsifying agent includes nonionic surface active agent, anion surfactant, cationic surfactant, preferably
HLB value is 8~10 nonionic surfactant.Consumption is the 2%~8% of defoamer gross mass.
Nonionic surfactant includes AEO, aliphatic acid polyethenoxy ether, fatty acid ester polyoxy second
Alkene ether, polyoxyethylene 20 sorbitan monolaurate, polyoxyethylene 20 sorbitan monopalmitate, polyoxyethylene sorbitan mountain
Pears alcohol monostearate, polyoxyethylene sorbitan list olein, polyoxyethylene 20 sorbitan trioleate, Sorbitan
Alcohol monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, mistake
Water sorbitol olein.
A kind of preparation process of mineral oil antifoam agent：
1. take end capped polyether C and the end capped polyether B of half quality with 500~1000rpm rotating speed at a high speed scattered 10~
20min, obtains polyether mixture；
2. by adding at 40 DEG C kinematic viscosity for 10~200mPa.s carrier A, wax D and remaining in heating response kettle
End capped polyether B, starts to warm up stirring, and heating rate control is controlled in 60~100rpm, temperature in 1~6 DEG C/min, mixing speed
0.5~1h is kept when being increased to 120~150 DEG C；
After 3. first step insulation terminates, continue to stir cooling down, temperature of charge is down to 70~90℃Added during C above-mentioned poly-
Ether mixture and emulsifying agent E, continue stirring and are down to room temperature；
4. said mixture colloid mill is circulated into 5min, defoamer of the present invention is produced.
Embodiment
Embodiment 1
By 100g end capped polyethers CH3CH2O(EO)10(PO)20CH2CH2CH2CH3With 50g end capped polyethers CH3(CH2)7O(EO)6
(PO)6CH3Polyether mixture is obtained with the 500rpm scattered 20min of rotating speed high speed stand-by；Then added in heating response kettle viscous
Spend the 700g machinery oil for 10mPa.s, 20g laurel waxs and 50g end capped polyethers CH3(CH2)7O(EO)6(PO)6CH3In 1 DEG C/min
Heating rate and 60rpm mixing speed rise to 130 DEG C, are incubated 0.5h, after insulation terminates, and continue to stir cooling down, 70
Stand-by polyether mixture and 80g fatty acid ester APEOs before DEG C adding, continue stirring and are down to room temperature, finally use
Colloid mill circulation 5min produces defoamer I of the present invention.
Embodiment 2
By 80g end capped polyethers CH3CH2CH2O(EO)2(PO)10CH3With 25g end capped polyethers CH2=CH (CH2)10O(EO)40
(PO)15CH2CH2CH2CH3Polyether mixture is obtained with the 1000rpm scattered 10min of rotating speed high speed stand-by；Then in heating response
800g white oils, 50g paraffin and 25gCH that viscosity is 50mpa.s are added in kettle2=CH (CH2)10O(EO)40(PO)15CH2CH2CH2CH3150 DEG C are risen in the mixing speed of 6 DEG C/min heating rates and 70rpm, 1h is incubated, after insulation terminates, after
Continuous stirring cooling down, stand-by polyether mixture and the oleic acid of 20g polyoxyethylene sorbitans three before 80 DEG C add
Ester, continues stirring and is down to room temperature, finally produces defoamer II of the present invention using colloid mill circulation 5min.
Embodiment 3
By 100g end capped polyethers CH2=CHCH2CH2O(EO)4(PO)12CH2CH2CH2CH3With 75g end capped polyethers CH3(CH2)13O(EO)20(PO)8CH3Polyether mixture is obtained with the 600rpm scattered 15min of rotating speed high speed stand-by；Then in heating response
610g heavy oil, 60g OPEs and 75g end capped polyethers CH that viscosity is 150mpa.s are added in kettle3(CH2)13O(EO)20
(PO)8CH3132 DEG C are risen in the mixing speed of 2 DEG C/min heating rates and 100rpm, 0.6h is incubated, after insulation terminates, continued
Stir cooling down, stand-by polyether mixture and 80g polyoxyethylene sorbitan list palmitic acids before 90 DEG C add
Ester, continues stirring and is down to room temperature, finally produces defoamer III of the present invention using colloid mill circulation 5min.
Embodiment 4
By 50g end capped polyethers CH3CH2O(EO)6(PO)15CH3With 55g end capped polyethers CH2=CH (CH2)14O(EO)10(PO)10CH2CH2CH2CH3Polyether mixture is obtained with the 800rpm scattered 18min of rotating speed high speed stand-by；Then in heating response kettle
Add 750g naphthenic oils, 40g beeswaxs and 55g end capped polyethers CH that viscosity is 200mpa.s2=CH (CH2)14O(EO)10(PO)10CH2CH2CH2CH3150 DEG C are risen in the mixing speed of 3 DEG C/min heating rates and 80rpm, 0.9h is incubated, after insulation terminates,
Continue to stir cooling down, stand-by polyether mixture and 50g polyoxyethylene sorbitans list palm fibre before 74 DEG C add
Glycerin monostearate, continues stirring and is down to room temperature, finally produces defoamer IV of the present invention using colloid mill circulation 5min.
Embodiment 5
By 90g end capped polyethers CH2=CHCH2O(EO)8(PO)20CH3With 75g end capped polyethers CH2=CH (CH2)16O(EO)30
(PO)4CH2CH2CH2CH3Polyether mixture is obtained with the 900rpm scattered 14min of rotating speed high speed stand-by；Then in heating response kettle
It is middle to add 690g kerosene, 30g ethane-acetic acid ethyenyl copolymerization waxes and the 75g end capped polyethers CH that viscosity is 100mpa.s2=CH
(CH2)16O(EO)30(PO)4CH2CH2CH2CH3120 DEG C, insulation are risen in the mixing speed of 4 DEG C/min heating rates and 90rpm
0.8h, after insulation terminates, continues to stir cooling down, stand-by polyether mixture and 40g polyoxy second before 84 DEG C add
Alkene sorbitan monopalmitate, continues stirring and is down to room temperature, finally produces froth breaking of the present invention using colloid mill circulation 5min
Agent V.
Embodiment 6
By 60g end capped polyethers CH2=CHCH2CH2O(EO)2(PO)8CH2CH2CH2CH3With 75g end capped polyethers CH3CH2C
(CH3)2(CH2)15O(EO)5(PO)2CH3Polyether mixture is obtained with the 700rpm scattered 12min of rotating speed high speed stand-by；Then exist
650g alkylbenzenes, 60g polypropylene waxes and 75g end capped polyethers CH that viscosity is 170mpa.s are added in heating response kettle3CH2C
(CH3)2(CH2)15O(EO)5(PO)2CH3134 DEG C are risen in the mixing speed of 5 DEG C/min heating rates and 90rpm, 0.7h is incubated,
After insulation terminates, continue to stir cooling down, stand-by polyether mixture and 80g aliphatic acid polyoxy second before 88 DEG C add
Alkene ether, continues stirring and is down to room temperature, finally produces defoamer VI of the present invention using colloid mill circulation 5min.
Embodiment 7
By 70g end capped polyethers CH3CH2O(EO)4(PO)18CH3With 40g end capped polyethers CH2=CHCH2CH2C(CH3)2(CH2)17O(EO)25(PO)12CH3Polyether mixture is obtained with the 850rpm scattered 17min of rotating speed high speed stand-by；Then in heating response
780g diesel oil, 40g OPEs and 40g CH that viscosity is 120mpa.s are added in kettle2=CHCH2CH2C(CH3)2
(CH2)17O(EO)25(PO)12CH3122 DEG C are risen in the mixing speed of 3 DEG C/min heating rates and 90rpm, 0.5h, insulation is incubated
After end, continue to stir cooling down, stand-by polyether mixture and 30g aliphatic alcohol polyethenoxies before 76 DEG C add
Ether, continues stirring and is down to room temperature, finally produces defoamer VII of the present invention using colloid mill circulation 5min.
Comparative example 1
By 60g end capped polyethers CH3CH2O(EO)10(PO)20CH2CH2CH2CH3With 60g end capped polyethers CH3(CH2)7O(EO)6
(PO)6CH3Polyether mixture is obtained with the 650rpm scattered 16min of rotating speed high speed stand-by；Then added in heating response kettle viscous
Spend the 760g machinery oil for 300mpa.s, 30g OPEs and 60g end capped polyethers CH3(CH2)7O(EO)6(PO)6CH32
DEG C/min heating rates and 75rpm mixing speed rises to 142 DEG C, is incubated 0.6h, after insulation terminates, continues to stir cooling cold
But stand-by polyether mixture and 30g polyoxyethylene sorbitan list oleins, before 76 DEG C add, continue to stir drop
To room temperature, finally defoamer G-I of the present invention is produced using colloid mill circulation 5min.
Comparative example 2
By 50g end capped polyethers CH3CH2CH2O(EO)2(PO)10CH3With 45g end capped polyethers CH2=CH (CH2)10O(EO)40
(PO)15CH2CH2CH2CH3Polyether mixture is obtained with the 750rpm scattered 20min of rotating speed high speed stand-by；Then in heating response
810g5# white oils, 30g paraffin and 45g end capped polyethers CH that viscosity is 5mpa.s are added in kettle2=CH (CH2)10O(EO)40(PO)15CH2CH2CH2CH3138 DEG C are risen in the mixing speed of 5 DEG C/min heating rates and 90rpm, 0.5h is incubated, after insulation terminates,
Continue to stir cooling down, stand-by polyether mixture and 20g sorbitan trioleates before 78 DEG C add continue
Room temperature is down in stirring, finally produces defoamer G-II of the present invention using colloid mill circulation 5min.
Comparative example 3
By 80g end capped polyethers CH2=CHCH2CH2O(EO)4(PO)12CH2CH2CH2CH3With 50g CH3(CH2)13O(EO)20
(PO)8It is stand-by that Na obtains polyether mixture with the 950rpm scattered 10min of rotating speed high speed；Then added in heating response kettle viscous
Spend the 750g heavy oil, 38g OPEs and 50g CH for 80mpa.s3(CH2)13O(EO)20(PO)8Na is in 1 DEG C/min liters
Warm speed and 70rpm mixing speed rise to 132 DEG C, are incubated 0.7h, after insulation terminates, and continue to stir cooling down, at 88 DEG C
Stand-by polyether mixture and 32g sorbitan trioleates before adding, continue stirring and are down to room temperature, finally using glue
Body mill circulation 5min produces defoamer G-III of the present invention.
Comparative example 4
By 50gCH3CH2O(EO)6(PO)15H and 55g blocks CH2=CH (CH2)14O(EO)10(PO)10CH2CH2CH2CH3With
It is stand-by that the 1000rpm scattered 10min of rotating speed high speed obtains polyether mixture；Then viscosity is added in heating response kettle is
110mpa.s 770g naphthenic oils, 22g OPEs and 55g CH2=CH (CH2)14O(EO)10(PO)10CH2CH2CH2CH3
132 DEG C are risen in the mixing speed of 1 DEG C/min heating rates and 70rpm, 0.7h is incubated, after insulation terminates, continues to stir cooling
Cooling, stand-by polyether mixture and 48g sorbitan trioleates before 88 DEG C add continue stirring and are down to room
Temperature, finally produces defoamer G-IV of the present invention using colloid mill circulation 5min.
Comparative example 5
130mpa.s 780g alkylbenzenes, 26g ethane-acetic acid ethyenyl copolymerization waxes and 160g are added in heating response kettle
CH2=CH (CH2)16O(EO)30(PO)4Na, starts to warm up stirring, and heating rate control exists in 3 DEG C/min, mixing speed control
70rpm, temperature is incubated 0.6h when being increased to 136 DEG C；Afterwards, continue to stir cooling down, temperature of charge is added when being down to 78 DEG C
34g polyoxyethylene 20 sorbitan monolaurates, continue stirring and are down to room temperature；5min finally is circulated using colloid mill, is produced
Defoamer G-V of the present invention.
Comparative example 6
160mpa.s 775g machinery oil, 26g sugarcane waxes and 88g end capped polyethers CH is added in heating response kettle2=
CHCH2CH2O(EO)2(PO)8CH2CH2CH2CH3And 72g end capped polyethers CH3CH2C(CH3)2(CH2)15O(EO)5(PO)2CH3, start
Heating stirring, heating rate control is controlled in 70rpm in 3 DEG C/min, mixing speed, and temperature is incubated 0.6h when being increased to 136 DEG C；
Afterwards, continue to stir cooling down, temperature of charge adds 30g polyoxyethylene 20 sorbitan monolaurates when being down to 78 DEG C,
Continue stirring and be down to room temperature；5min finally is circulated using colloid mill, defoamer G-VI of the present invention is produced.
Comparative example 7
By 80g end capped polyethers CH3CH2O(EO)4(PO)18CH3With 72g end capped polyethers CH2=CHCH2CH2C(CH3)2(CH2)17O(EO)25(PO)12CH3Polyether mixture is obtained with the 700rpm scattered 13min of rotating speed high speed stand-by；In heating response kettle
768g soybean oils, 55g lanocerins that viscosity is 190mPa.s are added, with 5 DEG C/min heating rate and 750rpm stirring speed
Degree rises to 144 DEG C, is incubated 0.5h, insulation continues to stir cooling down after terminating, when temperature of charge is down to 78 DEG C, before addition
Stand-by polyether mixture and 25g polyoxyethylene sorbitan list olein, continues stirring and is down to room temperature, finally using colloid mill
5min is circulated, defoamer G-VII of the present invention is produced.
The performance test methods of defoamer
(1) antifoaming performance is tested
600mL black liquor is added in circulation bubbling instrument first, design temperature is 85 DEG C, and flow is 6L/min, is then opened
Temperature detect switch (TDS), open the circulation pump after design temperature is heated to by foam liquid, is started impact foaming, is treated that foam is raised at 300mL, plus
Enter 0.2% defoamer, record foam height change with time.The performance of defoamer is better, the minimum scale that foam reaches
It is lower；The suds suppressing properties of defoamer are better, and foam reaches that the time at 300mL is longer again.
Antifoaming performance of the mineral oil antifoam agent of table 1 at 25 DEG C
I, II, III, IV, V, VI, VII suds that disappear, which are can be seen that, from above-mentioned test data is substantially superior to G-I, G-
II、G-III、G-IV、G-V、G-VI、G-VII。
(2) Tall oil extracted amount is tested
The defoamer sample of addition 0.6% in 100g black liquor, after desulfurization, acidifying, is dissolved with methanol acetone solution
Lignin, finally with petroleum ether extraction, Tall oil is obtained after being evaporated.
The Tall oil of the mineral oil antifoam agent of table 2 extracts data
| Sample | Test volume/mL | Tall oil/the g being collected into | With blank sample than Tall oil extracted amount increase rate/% |
| I | 100 | 0.109 | 24.15 |
| G-I | 100 | 0.105 | 19.59 |
| II | 100 | 0.111 | 26.42 |
| G-II | 100 | 0.102 | 16.17 |
| III | 100 | 0.110 | 25.28 |
| G-III | 100 | 0.106 | 20.73 |
| IV | 100 | 0.112 | 27.56 |
| G-IV | 100 | 0.107 | 21.87 |
| V | 100 | 0.113 | 28.70 |
| G-V | 100 | 0.104 | 20.68 |
| VI | 100 | 0.116 | 32.12 |
| G-VI | 100 | 0.108 | 23.01 |
| VII | 100 | 0.115 | 30.98 |
| G-VII | 100 | 0.100 | 13.89 |
It can be seen that from above-mentioned test data and be substantially better than G- using I, II, III, IV, V, VI, VII Tall oil recovery rate
I、G-II、G-III、G-IV、G-V、G-VI、G-VII。
Claims (4)
1. a kind of mineral oil antifoam agent for black liquid, it is characterised in that composed of the following components：
A. carrier is mineral oil, and selected from kerosene, diesel oil, soybean oil, white oil, heavy oil, machinery oil, naphthenic oil, alkylbenzene, motion is viscous
Degree (40 DEG C) scope is 10~200mPa.s, and carrier consumption is the 60~80% of defoamer gross mass；
B. modified polyether general formula R O (EO)x(PO)yR ', x are that 5~40, y is the straight chain or branch that 1~15, R is carbon number 8~24
Alkyl group, alkylene, cycloalkyl, R ' are the straight or branched alkyl of carbon number 1~4；End capped polyether consumption is that defoamer is total
The 5~15% of quality；
C. modified polyether formula is R " O (EO)m(PO)nR " ', wherein m are that 2~10, n is that 10~20, R " is carbon number 2~4
Alkyl, alkylene, R " ' be carbon number 1~4 straight or branched alkyl；End capped polyether consumption for defoamer gross mass 5~
10%；
D. wax
Wax is selected from vegetable wax, animal wax, mineral wax, synthetic wax；Consumption is generally the 2~6% of defoamer gross mass；
E. emulsifying agent
Emulsifying agent includes nonionic surface active agent, anion surfactant, cationic surfactant, and consumption is froth breaking
The 2%~8% of agent gross mass；
The mineral oil antifoam agent of black liquid is prepared by above component, preparation method is as follows：
1. the end capped polyether C and end capped polyether B of half quality is disperseed at a high speed 10~20min with 500~1000rpm rotating speed,
Obtain polyether mixture；
2. kinematic viscosity at 40 DEG C is proportionally added into heating response kettle for 10~200mPa.s carrier A, wax D and another
The end capped polyether B of half mass, starts to warm up stirring, heating rate control in 1~6 DEG C/min, mixing speed control 60~
100rpm, temperature keeps 0.5~1h when being increased to 120~150 DEG C；
3. after first step insulation terminates, continue to stir cooling down, temperature of charge adds above-mentioned polyethers and mixed when being down to 70~90 DEG C
Compound and emulsifying agent E, continue stirring and are down to room temperature；
4. said mixture colloid mill is circulated into 5min, produces defoamer of the present invention.
2. the mineral oil antifoam agent according to claim 1 for black liquid, the preferred machinery oil of carrier.
3. the mineral oil antifoam agent according to claim 1 for black liquid, the preferably synthetic wax of wax.
4. the mineral oil antifoam agent according to claim 1 for black liquid, the preferred HLB value of emulsifying agent is 8~10
Nonionic surfactant.
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| CN109011718B (en) * | 2018-08-23 | 2021-03-05 | 南京瑞思化学技术有限公司 | Preparation method of oil-based dispersion |
| CN114768311A (en) * | 2022-05-07 | 2022-07-22 | 浙江汉景环保化学材料科技有限公司 | Defoaming agent composition for acrylonitrile production device |
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| SE9301347A0 (en) * | 1992-04-27 | 1993-10-28 | Nikko Chemical Inst Inc | Anti-foaming composition of emulsion type and anti-foaming method using the same |
| CN1903951B (en) * | 2006-07-28 | 2010-05-12 | 南京四新科技应用研究所有限公司 | Improved non-organic silicone paint antifoaming agent and its preparation method |
| CN100531850C (en) * | 2007-04-30 | 2009-08-26 | 南京四新科技应用研究所有限公司 | Preparation for general defoaming agent and its application |
| CN101811007A (en) * | 2009-12-02 | 2010-08-25 | 广东省石油化工研究院 | Application of glycidyl terminated polyether in defoamer |
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