CN103628353B - A kind of method improving fatty alcohol emulsion stability - Google Patents
A kind of method improving fatty alcohol emulsion stability Download PDFInfo
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- CN103628353B CN103628353B CN201310646828.XA CN201310646828A CN103628353B CN 103628353 B CN103628353 B CN 103628353B CN 201310646828 A CN201310646828 A CN 201310646828A CN 103628353 B CN103628353 B CN 103628353B
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Abstract
The present invention relates to a kind of method improving fatty alcohol emulsion stability, high speed dispersor is utilized to carry out Strong dispersion to fatty alcohol emulsion, be dispersed in aqueous phase with making fatty alcohol uniform particles, simultaneously, in preparation process, by macromolecule polyacrylic acid salt dispersant and macromolecule polyacrylic acid class thickener synergy, good dispersion effect can be played, thus obtain the good anti-foam product of stability.
Description
Technical field
The present invention relates to a kind of method improving fatty alcohol emulsion stability, fatty alcohol emulsion a kind ofly can play good froth breaking, the defoamer of degasification in paper making wet part, belongs to technology of fine chemicals.
Background technology
In paper making wet part, sizing agent, retention agent, filter aid, reinforcing agent, deinking agent etc. can be used according to different paper kind and there is surface-active auxiliary agent, be easy to produce bubble in white water system process, the existence of these bubbles has a great impact paper, make that degree of sizing is poor, spot appears in paper, diaphanous spot and aperture etc., even cause disconnected paper, and easily make the operational efficiency of pump decline, increase energy consumption.
Antifoam agent for wet part of papermaking commercially available at present is mainly divided into this build and emulsion-type, and this build is modified polyether, and emulsion-type is fatty alcohol emulsion.Contrast the market price of two defoamers and the impact on paper-making sizing, finished paper quality, fatty alcohol emulsion type defoamer all occupies the absolute market advantage.
Mostly there is common feature in fatty alcohol emulsion type defoamer commercially available at present, As time goes on emulsion viscosity can become large gradually in storage process, even can not flow, this addition manner in use utilizing pump to pump to client brings difficulty, and therefore the stability of fatty alcohol emulsion type defoamer is an important indicator of this defoamer.
Fatty alcohol is divided into synthetic fatty alcohol and natural fatty alcohol, the natural fatty alcohol emulsion intercalation method domestic and international difficult problem that faces of researcher especially.All propose anion in DE-A-3601929 and DE-A-3039393 and/or non-ionic surface active agent can stablize synthetic fatty alcohol, but well can not disperse natural fatty alcohol.In whole emulsion, natural fatty alcohol can only account for 20% of fatty alcohol used at most, if the content of the natural alcohol in fatty alcohol is greater than 20%, the fatty alcohol emulsion so prepared is easy to retrogradation, especially under the condition of storage temperature lower than 15 DEG C, but can only place 1 day in a lot of situation.
The stability of researcher both domestic and external to fatty alcohol emulsion has done a lot of research, as CN1781574A utilizes C
2 ~ 4alkylene oxide with have the addition product of the primary alconol of branched alkyl to carry out stabile fat alcohol emulsion, but these class methods still can not solve natural fatty alcohol emulsion intercalation method; US5807502 utilizes C
6 ~ 18carry out stabile fat alcohol emulsion containing 1,2-glycol of straight chained alkyl and the addition product of oxirane as emulsifying agent, this type of emulsifying agent market is difficult to purchase, and synthesis material is expensive; Utilize fatty acid ester in addition, and the method stabile fat alcohol emulsion of anion surfactant is added by the emulsifying process later stage, but its anion surfactant need add at twice in the different stages, and through high-speed shearing equipment homogeneous emulsion after need first stirring, complex steps.
Emulsion intercalation method problem is solved by introducing new emulsifying agent in above prior art, or through first stir after high-speed shearing equipment homogeneous preparation, complex steps, production efficiency is low, and can not get stable product, user uses this defoamer very inconvenient.
Summary of the invention
The present invention utilizes high speed dispersor to carry out Strong dispersion to fatty alcohol emulsion, and be scattered in aqueous phase with making fatty alcohol uniform particles, then fast cooling does not destroy this decentralized photo and forms stable emulsion oil-in-water.
Good dispersion effect can be played by the synergy of macromolecule polyacrylic acid dipersant and macromolecule polyacrylic acid thickener in preparation process.Macromolecule polyacrylic acid dipersant is adsorbed on emulsified thing, by the charge effect of high strength, emulsified thing is disperseed uniformly, and plays package action by adding of macromolecule polyacrylic acid thickener, thus reach stable object.
A kind of method improving fatty alcohol emulsion stability of the present invention, described fatty alcohol emulsion is prepared by following steps:
(1) by C
12 ~ 30fatty alcohol, emulsifying agent, polyacrylate, fatty acid ester, help froth breaking material to be mixed and heated to 70 ~ 95 DEG C;
(2) high speed dispersor is utilized to disperse with the rotating speed of 1500 ~ 4500r/min, jitter time 0.1 ~ 1h;
(3) add the hot water that Part I temperature is 70 ~ 95 DEG C, the time of adding water is 0.1 ~ 1h;
(4) Polyacrylate thickeners is added;
(5) add the hot water that Part II temperature is 70 ~ 95 DEG C, the time of adding water is 0.1 ~ 1h;
(6) be quickly cooled to room temperature, obtain fatty alcohol emulsion of the present invention.
In described fatty alcohol emulsion, fatty alcohol is C
12 ~ 30unitary to trihydroxylic alcohol, comprise synthetic fatty alcohol and natural fatty alcohol.Synthetic fatty alcohol can be obtained by the oxidation of alkyl aluminum by ziegler process, also can be obtained by oxo synthesis; Natural fatty alcohol can obtain by extracting in grease.Concrete, described fatty alcohol comprises the fatty alcohol containing single carbon number, as C
12alcohol, C
14alcohol, C
16alcohol, C
18alcohol, C
20alcohol, C
22alcohol, C
24alcohol, C
26alcohol, C
28alcohol, C
30alcohol; And the mixed fatty alcohol containing different carbon number, as C
12-18mixed alcohol, C
16-18mixed alcohol, C
16-22mixed alcohol, select wherein one or more.The consumption of fatty alcohol accounts for 15 ~ 25% of fatty alcohol emulsion gross mass.
Macromolecule polyacrylic acid dipersant is acrylic acid homopolymers, and its general structure is:
Wherein M is Na
+or NH
4 +.In the present invention, macromolecule polyacrylic acid salt is Sodium Polyacrylate, and molecular weight is 1000 ~ 10,000.The consumption of described macromolecule polyacrylic acid dipersant accounts for 0.1 ~ 5% of fatty alcohol emulsion gross mass.
The general structure of macromolecule polyacrylic acid thickener is as follows:
Wherein, R
1and R
2be respectively hydrogen atom or methyl, R
3for methyl or ethyl, subscript a and b is integer, and 50≤a+b≤5000.Polyphosphazene polymer propionic acid thickener in the present invention is the copolymer of acrylic acid and ethyl acrylate, R
1and R
2be preferably hydrogen atom respectively, R
3for ethyl, molecular weight is 50,000 ~ 500,000.The consumption of described polyphosphazene polymer propionic acid thickener accounts for 0.1 ~ 3% of fatty alcohol emulsion gross mass.
Fatty acid ester is by C
12 ~ 22aliphatic acid and C
1 ~ 18the reaction of 1 ~ 6 yuan of alcohol and obtain, can be monoesters or polyester.Described aliphatic acid comprises laurate, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid; Described alcohol comprises methyl alcohol, ethanol, propyl alcohol, butanols, hexanol, decyl alcohol, octadecanol, ethylene glycol, propylene glycol, glycerol, pentaerythrite.The consumption of the fatty acid ester in described fatty alcohol emulsion accounts for 1 ~ 6% of fatty alcohol emulsion gross mass.
The froth breaking material that helps of the present invention selects organic hydrocarbon material, the white oil be such as purchased, paraffin; Or the polyoxyethylene poly-oxygen propylene aether of unitary or polyalcohol, as the glycerin polyoxyethylene polyethenoxy ether be purchased.Describedly help defoamer material to be used alone or used in combination, consumption is 2 ~ 8% of fatty alcohol emulsion gross mass.
Emulsifying agent in described fatty alcohol emulsion is nonionic surface active agent, comprises C
1 ~ 30fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, consumption is 0.05 ~ 5% of fatty alcohol emulsion gross mass.
In described fatty alcohol emulsion, water is decentralized medium, and its consumption determines the solid content of emulsion, preferably accounts for 60 ~ 75% of fatty alcohol emulsion gross mass.Moisture two parts add, and account for the half of water gross mass respectively.
Detailed description of the invention
Embodiment 1
By 15gC
18-26mixed alcohol, 3.7g paraffin, 6g pentaerythritol monostearate, 0.05g isomerous tridecanol polyoxyethylene ether (30), 0.1g molecular weight be 5000 Sodium Polyacrylate be mixed and heated to 90 DEG C; Then utilize high speed dispersor with the rotating speed of 1500r/min dispersion 1h; Add the hot water of 37.5g90 DEG C, the time of adding water is 0.5h; Add the Polyacrylate thickeners that 0.15g molecular weight is 100,000, continue the hot water adding 37.5g90 DEG C, the time of adding water is 0.5h; Finally be quickly cooled to room temperature, the fatty alcohol emulsion that viscosity is 312mPas can be obtained.
Embodiment 2
By 25gC
22natural fatty alcohol, 2g glycerin polyoxyethylene polyethenoxy ether, 3.9g pentaerythritol monostearate, 5g isomerous tridecanol polyoxyethylene ether (30), 2g molecular weight be 1000 Sodium Polyacrylate be mixed and heated to 90 DEG C, high speed dispersor is utilized to carry out dispersion 0.8h with the rotating speed of 2100r/min, add the hot water of 31g90 DEG C, the time of adding water is 0.5h, adding 0.1g molecular weight is 210, the Polyacrylate thickeners of 000, continue the hot water adding 31g90 DEG C, the time of adding water is 0.5h, finally be quickly cooled to room temperature, the fatty alcohol emulsion that viscosity is 325mPas can be obtained.
Embodiment 3
By 15gC
18natural fatty alcohol, 5gC
18-26mixing synthetic fatty alcohol, 4g paraffin, 1g glycerin monostearate, 1g polyoxyethylene nonylphenol ether (40), 2.5g molecular weight be 7500 Sodium Polyacrylate be mixed and heated to 85 DEG C, high speed dispersor is utilized to carry out dispersion 0.6h with the rotating speed of 3000r/min, add the hot water of 35g85 DEG C, the time of adding water is 1h, adding 1.5g molecular weight is 50, the Polyacrylate thickeners of 000, continue the hot water adding 35g85 DEG C, add water time 1h, finally be quickly cooled to room temperature, the fatty alcohol emulsion that viscosity is 385mPas can be obtained.
Embodiment 4
By 17gC
22natural fatty alcohol, 4g glycerin polyoxyethylene polyethenoxy ether, 4g white oil, 2g pentaerythritol monostearate, 2.5g isomerous tridecanol polyoxyethylene ether (30), 5g molecular weight be 10000 Sodium Polyacrylate be mixed and heated to 90 DEG C, high speed dispersor is utilized to carry out dispersion 0.3h with the rotating speed of 4000r/min, add the hot water of 31.5g90 DEG C, the time of adding water is 0.5h, adding 2.5g molecular weight is 500, the Polyacrylate thickeners of 000, continue the hot water adding 31.5g90 DEG C, the time of adding water is 0.5h, finally be quickly cooled to room temperature, the fatty alcohol emulsion that viscosity is 285mPas can be obtained.
Embodiment 5
By 18gC
22natural fatty alcohol, 6g paraffin, 5g pentaerythritol monostearate, 4g polyoxyethylene nonylphenol ether (40), 4g molecular weight be 3500 Sodium Polyacrylate be mixed and heated to 90 DEG C, high speed dispersor is utilized to carry out dispersion 0.1h with the rotating speed of 4500r/min, add the hot water of 30g90 DEG C, the time of adding water is 0.5h, adding 3g molecular weight is 350, the Polyacrylate thickeners of 000, continue the hot water adding 30g90 DEG C, the time of adding water is 0.5h, finally be quickly cooled to room temperature, the fatty alcohol emulsion that viscosity is 458mPas can be obtained.
Comparative example 1
By 24gC
18-26mixed alcohol, 2g paraffin, 3g pentaerythritol monostearate, 1g isomerous tridecanol polyoxyethylene ether (30), 0.2g neopelex is mixed and heated to 90 DEG C, stirs; Then add the water of 68.6g90 DEG C, obtain emulsion by high-speed shearing equipment, add 0.2g dodecyl sodium sulfate, add after cooling 1g molecular weight be 100,000 Polyacrylate thickeners namely obtain the fatty alcohol emulsion that viscosity is 335mPas.
Introduce pentaerythrite single-hard ester acid ester in comparative example 1, and substep interpolation anionic surfactant sodium dodecylbenzene sulfonate carrys out stabile fat alcohol emulsion.
Comparative example 2
By 24gC
18-26mixed alcohol, 2g paraffin, 3g pentaerythritol monostearate, 1g isomerous tridecanol polyoxyethylene ether (30), 5g molecular weight be 5000 Sodium Polyacrylate be mixed and heated to 90 DEG C, dispersed with stirring 0.5h is carried out with the rotating speed of 400r/min, add the hot water of 32g90 DEG C, the time of adding water is 0.5h, adding 1g molecular weight is 100, the Polyacrylate thickeners of 000, continue the hot water adding 32g90 DEG C, the time of adding water is 0.5h, last fast cooling, to room temperature, obtains the fatty alcohol emulsion that viscosity is 1200mPas.
Comparative example 3
By 20gC
22natural fatty alcohol, 4.8g glycerin polyoxyethylene polyethenoxy ether, 3.5g pentaerythritol monostearate, 4.5g isomerous tridecanol polyoxyethylene ether (30), 3.8g molecular weight be 1000 Sodium Polyacrylate be mixed and heated to 90 DEG C, dispersed with stirring 0.5h is carried out with the rotating speed of 400r/min, add the hot water of 31.2g90 DEG C, the time of adding water is 0.5h, adding 1g molecular weight is 210, the Polyacrylate thickeners of 000, continue the hot water adding 31.2g90 DEG C, the time of adding water is 0.5h, by High shear device homogeneous, fast cooling is to room temperature, obtain the fatty alcohol emulsion that viscosity is 342mPas.
Comparative example 2 and 3 adopts Sodium Polyacrylate and Polyacrylate thickeners, utilizes normal agitation equipment to prepare fatty alcohol emulsion respectively.
Comparative example 4
By 11gC
18natural fatty alcohol, 5gC
18-26mixing synthetic fatty alcohol, 3.5g paraffin, 5g glycerin monostearate, 3g polyoxyethylene nonylphenol ether (40), 0.3g disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate are mixed and heated to 90 DEG C, high speed dispersor is utilized to carry out dispersion 0.5h with the rotating speed of 3000r/min, add the hot water of 35.6g90 DEG C, the time of adding water is 0.5h, adding 1g molecular weight is 50, the Polyacrylate thickeners of 000, continue the hot water adding 35.6g90 DEG C, the time of adding water is 0.5h, last fast cooling, to room temperature, obtains the fatty alcohol emulsion that viscosity is 390mPas.
Comparative example 4 utilizes disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate to prepare fatty alcohol emulsion as dispersant.
Comparative example 5
By 19gC
18-26mixing synthetic fatty alcohol, 6g paraffin, 3g pentaerythritol monostearate, 0.4g isomerous tridecanol polyoxyethylene ether (30), 0.4g molecular weight be 1000 Sodium Polyacrylate be mixed and heated to 90 DEG C, high speed dispersor is utilized to carry out dispersion 0.5h with the rotating speed of 1500r/min, add the hot water of 35.1g90 DEG C, the time of adding water is 0.5h, continue the hot water adding 35.1g90 DEG C, the time of adding water is 0.5h, finally be quickly cooled to room temperature, adding 1g molecular weight is 210, the Polyacrylate thickeners of 000, can obtain the fatty alcohol emulsion that viscosity is 286mPas.
Comparative example 5 adds Polyacrylate thickeners adjusting viscosity after the completion of reaction.
Stability of emulsion is tested
The fatty alcohol emulsion of preparation is divided into three parts be placed on 5 DEG C, 25 DEG C, 40 DEG C respectively within 3 months, carry out viscosity tracking and testing.Concrete method of testing adopts NDJ-8 type digital display viscosity apparatus, and 2# rotor, tests under 6rpm condition.Concrete condition sees the following form 1 (viscosity unit mPas):
The viscosity B coefficent of table 1 defoamer
As can be seen from the above table, fatty alcohol emulsion prepared by the present invention stores 3 months under 5 DEG C, 25 DEG C, 40 DEG C conditions, and viscosity B coefficent amplitude is all very little, shows good storage stability.On the contrary, although employ same oil phase, fatty alcohol emulsion viscosity prepared by comparative example 1 ~ 5 all has increase in various degree.
Adopt the method in comparative example 1 to prepare compared with fatty alcohol emulsion prepares fatty alcohol emulsion with the method in the embodiment of the present invention 1, it is larger that comparative example 1 places 3 months viscosity B coefficent amplitudes at 5 DEG C; The fatty alcohol emulsion initial viscosity utilizing normal agitation to prepare in comparative example 2 is just very large, fatty alcohol emulsion prepared by the method utilizing normal agitation and high-speed shearing equipment homogeneous to combine in comparative example 3 is placed 3 months viscosity and is added at 5 DEG C, the fatty alcohol emulsion utilizing common dispersants disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate to replace macromolecule polyacrylic acid sodium to prepare in comparative example 4 is placed 3 months viscosity and is too increased at 5 DEG C, and adopt Polyacrylate thickeners finally to add in comparative example 5 fatty alcohol emulsion prepared by adjusting viscosity is placed and can not be flowed for 3 months at 40 DEG C.
Antifoaming performance is tested
Testing arrangement: Portable circulation bubbling instrument
Method of testing: add 600mL corrugated paper plain boiled water in Portable circulation bubbling instrument, be heated to 40 DEG C, turn-on flow rate pump, under the flow of 9L/min, being circulated to foam volume is 300mL, then adds 6 μ L defoamers, record foam volume rule over time.In same time, foam volume is less, and antifoaming performance is better.See the following form 2
The antifoaming performance test of table 2 defoamer
Fatty alcohol emulsion prepared by the present invention all shows good disappearing and presses down bubble effect.Wherein, although comparative example 2 and embodiment 1 use identical oil phase, show poor disappearing and press down bubble effect, mainly because independent normal agitation mode can not fully emulsified disperse fat alcohol.
Claims (5)
1. one kind is improved the method for fatty alcohol emulsion stability, described fatty alcohol emulsion by based on fatty alcohol emulsion gross mass 15 ~ 25% the fatty alcohol of C12 ~ 30, the molecular weight of 0.1 ~ 5% be 1000 ~ 10, the polyacrylate of 000, the molecular weight of 0.1 ~ 3% are 50,000 ~ 500, the Polyacrylate thickeners of 000, the fatty acid ester of 1 ~ 6%, 2 ~ 8% help froth breaking material, 0.05 ~ 5% emulsifying agent and 60 ~ 75% water composition, it is characterized in that, described fatty alcohol emulsion is prepared by following steps:
(1) by the fatty alcohol of above-mentioned consumption, emulsifying agent, polyacrylate, fatty acid ester, help froth breaking material to be mixed and heated to 70 ~ 95 DEG C;
(2) utilize high speed dispersor to disperse with the rotating speed of 1500 ~ 4500r/min, jitter time is 0.1 ~ 1h;
(3) temperature adding half consumption is the hot water of 70 ~ 95 DEG C, and the time of adding water is 0.1 ~ 1h;
(4) Polyacrylate thickeners is added;
(5) add the hot water that second half temperature is 70 ~ 95 DEG C, the time of adding water is 0.1 ~ 1h;
(6) be quickly cooled to room temperature, obtain described fatty alcohol emulsion.
2. a kind of method improving fatty alcohol emulsion stability according to claim 1, is characterized in that, described polyacrylate is Sodium Polyacrylate.
3. a kind of method improving fatty alcohol emulsion stability according to claim 1, is characterized in that, described Polyacrylate thickeners is the copolymer of acrylic acid and ethyl acrylate.
4. a kind of method improving fatty alcohol emulsion stability according to claim 1, is characterized in that, described in help froth breaking material to be the polyoxyethylene poly-oxygen propylene aether of organic hydrocarbon material, unitary or polyalcohol, to be used alone or used in combination.
5. a kind of method improving fatty alcohol emulsion stability according to claim 1, is characterized in that, described emulsifying agent is non-ionic surface active agent.
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| CN103628353B true CN103628353B (en) | 2016-01-20 |
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| DE10233701A1 (en) * | 2002-07-24 | 2004-02-05 | Basf Ag | Defoamers and / or deaerators for aqueous media that tend to foam |
| CN101530759B (en) * | 2009-03-11 | 2011-02-09 | 南京四新科技应用研究所有限公司 | Method for dispersing higher fatty alcohol mixture |
| CN101690857B (en) * | 2009-10-10 | 2011-12-28 | 南京四新科技应用研究所有限公司 | Natural high class fatty alcohol emulsion and preparation method thereof |
| CN101733039B (en) * | 2009-12-07 | 2012-06-06 | 南京四新科技应用研究所有限公司 | High-grade fatty alcohol emulsion and preparation method thereof |
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