CN103628353A - Method for improving fatty alcohol emulsion stability - Google Patents
Method for improving fatty alcohol emulsion stability Download PDFInfo
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- CN103628353A CN103628353A CN201310646828.XA CN201310646828A CN103628353A CN 103628353 A CN103628353 A CN 103628353A CN 201310646828 A CN201310646828 A CN 201310646828A CN 103628353 A CN103628353 A CN 103628353A
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- fatty alcohol
- alcohol emulsion
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Abstract
The invention relates to a method for improving fatty alcohol emulsion stability. A high-speed dispersion machine is utilized to intensively disperse fatty alcohol emulsion so as to enable fatty alcohol particles to be uniformly dispersed in a water phase; meanwhile, in the preparation process, due to the synergistic effect of a macromolecule polyacrylic acid salt dispersing agent and a macromolecule polyacrylic acid thickening agent, an excellent dispersing effect can be played, so that an antifoaming agent product with good stability performance can be obtained.
Description
Technical field
The present invention relates to a kind of method that improves fatty alcohol emulsion stability, fatty alcohol emulsion is a kind of good froth breaking, defoamer of degasification of can playing in paper making wet part, belongs to technology of fine chemicals.
Background technology
In paper making wet part, according to different paper kinds, can use sizing agent, retention agent, filter aid, reinforcing agent, deinking agent etc. and there is surface-active auxiliary agent, in whitewater closure cyclic process, be easy to produce bubble, 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.
Commercially available Antifoam agent for wet part of papermaking is mainly divided into this build and emulsion-type at present, and this build is modified polyether, and emulsion-type is fatty alcohol emulsion.Contrast the market price and the impact on paper-making sizing, finished paper quality of two defoamers, fatty alcohol emulsion type defoamer all occupies the absolute market advantage.
Mostly there is common feature in commercially available fatty alcohol emulsion type defoamer at present, it is large that As time goes on emulsion viscosity can become gradually in storage process, even can not flow, this addition manner of in use utilizing pump to pump to client brings difficulty, so 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 stability of the natural fatty alcohol emulsion difficult problem that researcher faces both at home and abroad especially.In DE-A-3601929 and DE-A-3039393, all propose anion and/or non-ionic surface active agent can be stablized synthetic fatty alcohol, but can not well 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 of preparation is easy to retrogradation so, especially storage temperature lower than the condition of 15 ℃ under, but can only place 1 day in a lot of situation.
Researcher both domestic and external has done a lot of research to the stability of fatty alcohol emulsion, as CN1781574A utilizes C2 ~ 4 alkylene oxide and has 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 the stability of natural fatty alcohol emulsion; What US5807502 utilized C6 ~ 18 contains 1 of straight chained alkyl, and the addition product of 2-glycol and oxirane carrys out stabile fat alcohol emulsion as emulsifying agent, and this type of emulsifying agent market is difficult to buy, and synthesis material is expensive; Utilize in addition fatty acid ester, and by the emulsifying process later stage, add the method stabile fat alcohol emulsion of anion surfactant, but its anion surfactant need add at twice in the different stages, and after need first stirring through high-speed shearing equipment homogeneous emulsion, complex steps.
In above prior art, by introducing new emulsifying agent, solve the stability problem of emulsion, or after first stirring 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 strongly to disperse fatty alcohol emulsion, makes fatty alcohol uniform particles and is scattered in water, and then fast cooling does not destroy this decentralized photo and forms stable emulsion oil-in-water.
Synergy by macromolecule polyacrylic acid dipersant and macromolecule polyacrylic acid thickener in preparation process can play good dispersion effect.Macromolecule polyacrylic acid dipersant is adsorbed on emulsified thing, by high-intensity charge effect, emulsified thing is disperseed uniformly, and by playing package action adding of macromolecule polyacrylic acid thickener, thereby reach stable object.
A kind of method that improves fatty alcohol emulsion stability of the present invention, described fatty alcohol emulsion is to prepare by following steps:
(1) by the fatty alcohol of C12 ~ 30, emulsifying agent, polyacrylate, fatty acid ester, help froth breaking material to be mixed and heated to 70 ~ 95 ℃;
(2) utilize high speed dispersor to disperse with the rotating speed of 1500 ~ 4500r/min, jitter time 0.1 ~ 1h;
(3) adding first's temperature is the hot water of 70 ~ 95 ℃, and adding the water time is 0.1 ~ 1h;
(4) add Polyacrylate thickeners;
(5) adding second portion temperature is the hot water of 70 ~ 95 ℃, and adding the water time is 0.1 ~ 1h;
(6) be quickly cooled to room temperature, obtain fatty alcohol emulsion of the present invention.
The monobasic that in described fatty alcohol emulsion, fatty alcohol is C12 ~ 30, to trihydroxylic alcohol, comprises synthetic fatty alcohol and natural fatty alcohol.Synthetic fatty alcohol can obtain by ziegler process in the oxidation by alkyl aluminum, also can obtain by oxo synthesis; Natural fatty alcohol can be by extracting and obtain in grease.Concrete, described fatty alcohol comprises the fatty alcohol containing single carbon number, as C12 alcohol, C14 alcohol, C16 alcohol, C18 alcohol, C20 alcohol, C22 alcohol, C24 alcohol, C26 alcohol, C28 alcohol, C30 alcohol; And the mixed fatty alcohol that contains different carbon numbers, as C12-18 mixed alcohol, C16-18 mixed alcohol, C16-22 mixed 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 are 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 respectively hydrogen atom, 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 reacted and obtained by the aliphatic acid of C12 ~ 22 and 1 ~ 6 yuan of alcohol of C1 ~ 18, 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 is selected organic hydrocarbon material, the white oil being for example purchased, paraffin; Or the polyoxyethylene poly-oxygen propylene aether of monobasic or polyalcohol, as the glycerin polyoxyethylene polyethenoxy ether being purchased.The described defoamer material that helps is used separately or mixes and use, and consumption is 2 ~ 8% of fatty alcohol emulsion gross mass.
Emulsifying agent in described fatty alcohol emulsion is nonionic surface active agent, comprises fatty alcohol-polyoxyethylene ether, the alkylphenol polyoxyethylene of C1 ~ 30, and 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 respectively half of water gross mass.
The specific embodiment
Embodiment 1
The Sodium Polyacrylate that is 5000 by 15g C18-26 mixed alcohol, 3.7g paraffin, 6g pentaerythritol monostearate, 0.05g isomerous tridecanol polyoxyethylene ether (30), 0.1g molecular weight is mixed and heated to 90 ℃; Then utilize high speed dispersor to disperse 1h with the rotating speed of 1500r/min; The hot water that adds 90 ℃ of 37.5g, adding the water time is 0.5h; Adding 0.15g molecular weight is 100,000 Polyacrylate thickeners, continues to add the hot water of 90 ℃ of 37.5g, and adding the water time is 0.5h; Finally be quickly cooled to room temperature, can obtain the fatty alcohol emulsion that viscosity is 312mPas.
Embodiment 2
By 25g C22 natural fatty alcohol, 2g glycerin polyoxyethylene polyethenoxy ether, 3.9g pentaerythritol monostearate, 5g isomerous tridecanol polyoxyethylene ether (30), 2g molecular weight is that 1000 Sodium Polyacrylate is mixed and heated to 90 ℃, utilize high speed dispersor to disperse 0.8h with the rotating speed of 2100r/min, the hot water that adds 90 ℃ of 31g, adding the water time is 0.5h, adding 0.1g molecular weight is 210, 000 Polyacrylate thickeners, continue to add the hot water of 90 ℃ of 31g, adding the water time is 0.5h, finally be quickly cooled to room temperature, can obtain the fatty alcohol emulsion that viscosity is 325 mPas.
Embodiment 3
By 15g C18 natural fatty alcohol, 5g C18-26 mixing synthetic fatty alcohol, 4g paraffin, 1g glycerin monostearate, 1g polyoxyethylene nonylphenol ether (40), 2.5g molecular weight is that 7500 Sodium Polyacrylate is mixed and heated to 85 ℃, utilize high speed dispersor to disperse 0.6h with the rotating speed of 3000r/min, the hot water that adds 85 ℃ of 35g, adding the water time is 1h, adding 1.5g molecular weight is 50, 000 Polyacrylate thickeners, continue to add the hot water of 85 ℃ of 35g, add water time 1h, finally be quickly cooled to room temperature, can obtain the fatty alcohol emulsion that viscosity is 385 mPas.
Embodiment 4
By 17g C22 natural fatty alcohol, 4g glycerin polyoxyethylene polyethenoxy ether, 4g white oil, 2g pentaerythritol monostearate, 2.5g isomerous tridecanol polyoxyethylene ether (30), 5g molecular weight is that 10000 Sodium Polyacrylate is mixed and heated to 90 ℃, utilize high speed dispersor to disperse 0.3h with the rotating speed of 4000r/min, the hot water that adds 90 ℃ of 31.5g, adding the water time is 0.5h, adding 2.5g molecular weight is 500, 000 Polyacrylate thickeners, continue to add the hot water of 90 ℃ of 31.5g, adding the water time is 0.5h, finally be quickly cooled to room temperature, can obtain the fatty alcohol emulsion that viscosity is 285 mPas.
Embodiment 5
The Sodium Polyacrylate that is 3500 by 18g C22 natural fatty alcohol, 6g paraffin, 5g pentaerythritol monostearate, 4g polyoxyethylene nonylphenol ether (40), 4g molecular weight is mixed and heated to 90 ℃, utilize high speed dispersor to disperse 0.1h with the rotating speed of 4500r/min, the hot water that adds 90 ℃ of 30g, adding the water time is 0.5h, adding 3g molecular weight is 350,000 Polyacrylate thickeners, continue to add the hot water of 90 ℃ of 30g, adding the water time is 0.5h, finally be quickly cooled to room temperature, can obtain the fatty alcohol emulsion that viscosity is 458 mPas.
Comparative example 1
By 24g C18-26 mixed alcohol, 2g paraffin, 3g pentaerythritol monostearate, 1g isomerous tridecanol polyoxyethylene ether (30), 0.2g neopelex is mixed and heated to 90 ℃, stirs; Then the water that adds 90 ℃ of 68.6g, obtains emulsion by high-speed shearing equipment, adds 0.2g dodecyl sodium sulfate, and adding 1g molecular weight after cooling is that 100,000 Polyacrylate thickeners obtains the fatty alcohol emulsion that viscosity is 335 mPas.
In comparative example 1, introduce pentaerythrite single-hard ester acid ester, and adding anionic surfactant sodium dodecylbenzene sulfonate carrys out stabile fat alcohol emulsion step by step.
Comparative example 2
The Sodium Polyacrylate that is 5000 by 24g C18-26 mixed alcohol, 2g paraffin, 3g pentaerythritol monostearate, 1g isomerous tridecanol polyoxyethylene ether (30), 5g molecular weight is mixed and heated to 90 ℃, rotating speed with 400r/min carries out dispersed with stirring 0.5h, the hot water that adds 90 ℃ of 32g, adding the water time is 0.5h, adding 1g molecular weight is 100,000 Polyacrylate thickeners, continue to add the hot water of 90 ℃ of 32g, adding the water time is 0.5h, last fast cooling, to room temperature, obtains the fatty alcohol emulsion that viscosity is 1200 mPas.
Comparative example 3
By 20g C22 natural fatty alcohol, 4.8g glycerin polyoxyethylene polyethenoxy ether, 3.5g pentaerythritol monostearate, 4.5g isomerous tridecanol polyoxyethylene ether (30), 3.8g molecular weight is that 1000 Sodium Polyacrylate is mixed and heated to 90 ℃, rotating speed with 400r/min carries out dispersed with stirring 0.5h, the hot water that adds 90 ℃ of 31.2g, adding the water time is 0.5h, adding 1g molecular weight is 210, 000 Polyacrylate thickeners, continue to add the hot water of 90 ℃ of 31.2g, adding the water time is 0.5h, by High shear device homogeneous, fast cooling is to room temperature, obtain the fatty alcohol emulsion that viscosity is 342 mPas.
Comparative example 2 and 3 adopts Sodium Polyacrylate and Polyacrylate thickeners, utilizes respectively common mixing plant to prepare fatty alcohol emulsion.
Comparative example 4
By 11g C18 natural fatty alcohol, 5g C18-26 mixing synthetic fatty alcohol, 3.5g paraffin, 5g glycerin monostearate, 3g polyoxyethylene nonylphenol ether (40), 0.3g disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate is mixed and heated to 90 ℃, utilize high speed dispersor to disperse 0.5h with the rotating speed of 3000r/min, the hot water that adds 90 ℃ of 35.6g, adding the water time is 0.5h, adding 1g molecular weight is 50, 000 Polyacrylate thickeners, continue to add the hot water of 90 ℃ of 35.6g, adding the water time is 0.5h, last fast cooling is to room temperature, obtain the fatty alcohol emulsion that viscosity is 390 mPas.
Comparative example 4 utilizes disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate to prepare fatty alcohol emulsion as dispersant.
Comparative example 5
By 19gC18-26 mixing synthetic fatty alcohol, 6g paraffin, 3g pentaerythritol monostearate, 0.4g isomerous tridecanol polyoxyethylene ether (30), 0.4g molecular weight is that 1000 Sodium Polyacrylate is mixed and heated to 90 ℃, utilize high speed dispersor to disperse 0.5h with the rotating speed of 1500r/min, the hot water that adds 35.1g90 ℃, adding the water time is 0.5h, continue to add the hot water of 35.1g90 ℃, adding the water time is 0.5h, finally be quickly cooled to room temperature, adding 1g molecular weight is 210, 000 Polyacrylate thickeners, can obtain the fatty alcohol emulsion that viscosity is 286 mPas.
Comparative example 5 adds Polyacrylate thickeners adjusting viscosity after reaction finishes.
stability of emulsion test
The fatty alcohol emulsion of preparation is divided into three parts to be placed on respectively at 5 ℃, 25 ℃, 40 ℃ 3 months and to carry out viscosity tracking and testing.Concrete method of testing is to adopt NDJ-8 type digital display viscosity apparatus, and 2# rotor, tests under 6rpm condition.The concrete condition mPas of 1(viscosity unit that sees the following form):
The viscosity of table 1 defoamer changes
As can be seen from the above table, fatty alcohol emulsion prepared by the present invention stores 3 months under 5 ℃, 25 ℃, 40 ℃ conditions, and viscosity amplitude of variation is all very little, has shown good storage stability.On the contrary, although used same oil phase, the fatty alcohol emulsion viscosity of comparative example 1 ~ 5 preparation all has increase in various degree.
Adopt method in comparative example 1 to prepare fatty alcohol emulsion and prepare fatty alcohol emulsion with the method in the embodiment of the present invention 1 and compare, it is larger that comparative example 1 is placed 3 months viscosity amplitudes of variation at 5 ℃; The fatty alcohol emulsion initial viscosity that utilizes common stirring to prepare in comparative example 2 is just very large, fatty alcohol emulsion prepared by the method for utilizing common stirring and high-speed shearing equipment homogeneous to combine in comparative example 3 is placed 3 months viscosity at 5 ℃ have been increased, the fatty alcohol emulsion that utilizes common dispersant disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate to replace macromolecule polyacrylic acid sodium to prepare in comparative example 4 is placed 3 months viscosity at 5 ℃ also have been increased, and adopts Polyacrylate thickeners finally to add fatty alcohol emulsion prepared by adjusting viscosity to place at 40 ℃ and can not flow for 3 months in comparative example 5.
antifoaming performance test
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 ℃, turn-on flow rate pump, under the flow of 9L/min, being circulated to foam volume is 300mL, then adds 6 μ L defoamers, records 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 are used identical oil phase, showing poor disappearing and press down bubble effect, is mainly because independent common agitating mode can not fully emulsified disperse fat alcohol.
Claims (5)
1. a method that improves fatty alcohol emulsion stability, described fatty alcohol emulsion is 1000 ~ 10 by the fatty alcohol of 15 ~ 25% C12 ~ 30 based on fatty alcohol emulsion gross mass, 0.1 ~ 5% molecular weight, 000 polyacrylate, 0.1 ~ 3% molecular weight are 50,000 ~ 500,000 Polyacrylate thickeners, 1 ~ 6% fatty acid ester, 2 ~ 8% help froth breaking material, 0.05 ~ 5% emulsifying agent and 60 ~ 75% water form, 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 ℃;
(2) utilize high speed dispersor to disperse with the rotating speed of 1500 ~ 4500r/min, jitter time is 0.1 ~ 1h;
(3) adding the temperature of half consumption is the hot water of 70 ~ 95 ℃, and adding the water time is 0.1 ~ 1h;
(4) add Polyacrylate thickeners;
(5) adding second half temperature is the hot water of 70 ~ 95 ℃, and adding the water time is 0.1 ~ 1h;
(6) be quickly cooled to room temperature, obtain described fatty alcohol emulsion.
2. a kind of method that improves fatty alcohol emulsion stability claimed in claim 1, is characterized in that, described polyacrylate is Sodium Polyacrylate.
3. a kind of method that improves fatty alcohol emulsion stability claimed in claim 1, is characterized in that, described Polyacrylate thickeners is the copolymer of acrylic acid and ethyl acrylate.
4. a kind of method that improves fatty alcohol emulsion stability claimed in claim 1, is characterized in that, described in to help froth breaking material be the polyoxyethylene poly-oxygen propylene aether of organic hydrocarbon material, monobasic or polyalcohol, use separately or mix and use.
5. a kind of method that improves fatty alcohol emulsion stability claimed in claim 1, is characterized in that, described emulsifying agent is non-ionic surface active agent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2019181334A (en) * | 2018-04-04 | 2019-10-24 | 栗田工業株式会社 | Foaming suppression method |
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| WO2004012843A1 (en) * | 2002-07-24 | 2004-02-12 | Basf Aktiengesellschaft | Defoaming agent and/or deaerator for aqueous media tending to foam |
| CN101530759A (en) * | 2009-03-11 | 2009-09-16 | 南京四新科技应用研究所有限公司 | Method for dispersing higher fatty alcohol mixture |
| CN101690857A (en) * | 2009-10-10 | 2010-04-07 | 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 |
| CN101733039A (en) * | 2009-12-07 | 2010-06-16 | 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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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004012843A1 (en) * | 2002-07-24 | 2004-02-12 | Basf Aktiengesellschaft | Defoaming agent and/or deaerator for aqueous media tending to foam |
| CN1671454A (en) * | 2002-07-24 | 2005-09-21 | 巴斯福股份公司 | Defoaming agent and/or deaerator for aqueous media tending to foam |
| CN101530759A (en) * | 2009-03-11 | 2009-09-16 | 南京四新科技应用研究所有限公司 | Method for dispersing higher fatty alcohol mixture |
| CN101690857A (en) * | 2009-10-10 | 2010-04-07 | 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 |
| CN101733039A (en) * | 2009-12-07 | 2010-06-16 | 南京四新科技应用研究所有限公司 | High-grade fatty alcohol emulsion and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019181334A (en) * | 2018-04-04 | 2019-10-24 | 栗田工業株式会社 | Foaming suppression method |
| JP7119512B2 (en) | 2018-04-04 | 2022-08-17 | 栗田工業株式会社 | Foam suppression method |
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