CN104326908A - Preparation method of sodium lauroyl lactate - Google Patents

Preparation method of sodium lauroyl lactate Download PDF

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Publication number
CN104326908A
CN104326908A CN201410569935.1A CN201410569935A CN104326908A CN 104326908 A CN104326908 A CN 104326908A CN 201410569935 A CN201410569935 A CN 201410569935A CN 104326908 A CN104326908 A CN 104326908A
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China
Prior art keywords
sodium
preparation
sodium lauroyl
sodium hydroxide
lactate
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CN201410569935.1A
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Chinese (zh)
Inventor
李勇
刘文斌
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XI'AN MIYI BIOTECHNOLOGY Co Ltd
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XI'AN MIYI BIOTECHNOLOGY Co Ltd
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Priority to CN201410569935.1A priority Critical patent/CN104326908A/en
Publication of CN104326908A publication Critical patent/CN104326908A/en
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41Preparation of salts of carboxylic acids
    • C07C51/412Preparation of salts of carboxylic acids by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/08Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/48Separation; Purification; Stabilisation; Use of additives

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention relates to a preparation method of sodium lauroyl lactate, belonging to the fields of food additives and preparation methods of food additives. The preparation method of sodium lauroyl lactate comprises the following steps: dissolving sodium hydroxide with purified water to obtain a sodium hydroxide liquid; dropwise adding the sodium hydroxide liquid to lactic acid at room temperature while stirring so as to react to generate a sodium lactate liquid; heating the sodium lactate liquid to 80 DEG C, introducing nitrogen gas to a material interface and then continuing heating and controlling the temperature at 190-210 DEG C; adding lauric acid and a catalyst, reacting for 60min, vacuumizing, and reacting for another 20min; and cooling and drying to obtain white to pale yellow solid which is sodium lauroyl lactate. The preparation method disclosed by the invention has the advantages of simpleness in process, high operability, low cost and the like and is suitable for industrial product; and through detection, the yield of sodium lauroyl lactate is 75% and the final acid value of the product is between 35 and 55.

Description

The preparation method of sodium lauroyl lactylate
Technical field
The present invention relates to a kind of preparation method of sodium lauroyl lactylate, belong to foodstuff additive and preparation method thereof field.
Background technology
Food emulsifier refers to the additive that immiscible liquid (water and oil) to be made in food processing process to form stabilized emulsion, mainly based on polyol esters of fatty acids and derivative product thereof and naturally occurring emulsifying agent soybean phospholipid and deep processed product.What consumption was maximum is monoglyceride, other also have sapn (Span), tween (Tween), propylene glycol ester, xylitol ester, Nitranitol, hard ester acyl lactylate and more than 20 kind such as calcium, soybean phospholipid, and output has exceeded 30,000 tons.Our times food emulsifier consumption is more than 400,000 tons.China's food emulsifier kind is also far less than abroad, and developing the emulsifying agent new variety of more excellent performance, is useful to the development of the food emulsifier of prosperity China.The fast development of China's foodstuffs industry in recent years, stimulates and has promoted the prodution and development of foodstuff additive, facilitating its production technology, the raising of Yield and quality and the adjustment of product structure.Thus huge market potential is contained in the foodstuff additive industry of China.Thus foodstuff additive industry has had good opportunity to develop.In the face of the opportunities and challenges in market, China's foodstuff additive should constantly develop new product, strengthen technological development dynamics, improve quality and the class of product, just can make to control oneself to be developed.
Sodium lauroyl lactylate is the series derivatives product of stearoyl lactate, from the structure of product, lauric acid is the lipid acid of carbochain in belonging to, thus its emulsifying property is better than stearic acid, product has more wetting ability, in oil-in-water or water in oil emulsion, it is the emulsifier production of an excellent performance.In wheaten food processing, there is very wide purposes especially, and can be widely used in various food-processing.Itself and other emulsifying agent is carried out composite, its wetting ability can be improved, make emulsifying property better.Middle carbonic acid is not only first-class at emulsifying property, and also has effect of its uniqueness in absorption of human body and in food antiseptic performance.
Therefore, study a kind of technique simple, workable, cost is low, is applicable to suitability for industrialized production and quality product is high, and the preparation method of the sodium lauroyl lactylate that synthetic ratio is high has a good application prospect.
Summary of the invention
It is simple, workable that the present invention aims to provide a kind of technique, and cost is low, is applicable to suitability for industrialized production and quality product is high, the preparation method of the sodium lauroyl lactylate that synthetic ratio is high.
The preparation method of sodium lauroyl lactylate of the present invention, comprises the following steps:
Sodium hydroxide solution is mixed with by after sodium hydroxide dissolved in purified water, progressively drop to when room mild stirring in lactic acid and carry out reaction generation sodium lactate solution, pass into nitrogen at material interface when sodium lactate solution being heated to 80 DEG C and continue computer heating control at 190-210 DEG C, add lauric acid and catalyzer, vacuumize after reaction 60min and react 20min again, cooling, whitely to light yellow solid and sodium lauroyl lactylate dry.
Preferably, the mol ratio of lactic acid of the present invention and sodium hydroxide is 1:1.03, and concentration of lye is 50%, and the method adopting alkali lye to drip is reacted.
Preferred, Sodium.alpha.-hydroxypropionate of the present invention and lauric mol ratio are 1:1.2.
Preferred further, catalyzer of the present invention is sodium hydroxide, and add-on is for reaction-ure mixture 0.35%.
In preparation method of the present invention, the first step reaction of sodium lauroyl lactylate is obtain lactic acid sodium, what select is sodium hydroxide, for reducing the generation of by product, in the reaction of second step, still select sodium hydroxide as catalyzer, the amount of adding is 0.35% of reaction-ure mixture, and adding will in the product with the composition of soap.
Producing of Sodium.alpha.-hydroxypropionate carries out when material cools reacting.After sodium hydroxide dissolved in purified water, progressively drop in lactic acid when stirring and react, the speed of response dripping alkali lye determines according to the temperature of material.General requirement reaction at normal temperatures (25 DEG C) is carried out, and controls the speed adding alkali lye well, prevents the local heating of reacting, causes product discoloration.For this reason in the reaction, the rate of addition of alkali lye should be worked good preferably with cooling material, and guarantee Sodium.alpha.-hydroxypropionate becomes colourless liquid.The temperature of second step esterification should control at 190-210 DEG C.Because of in Sodium.alpha.-hydroxypropionate containing more moisture content, there will be a large amount of water outlet phenomenon when reaction is warming up to 100 DEG C, at this moment heat up comparatively slow for this reason, 100-130 DEG C is relatively stable period.Once after moisture is evaporated, the temperature of material will rise quickly, at this moment wants the speed that attentional manipulation heats up well.The optimum temps of esterification at 190-210 DEG C, in order to ensure react carrying out, do not make product discoloration again, not easily temperature of reaction rise too high.Reaction should be maintained at 190-210 DEG C, until reacted.
Esterification is at high temperature reacted, in order to ensure the color and luster of product, reaction employing passes into nitrogen to get rid of and isolated air, in air, oxygen has oxygenizement to this reaction response thing, as bad in controlled, subdiaphanous reactant can be made to turn yellow rapidly, closely become tawny, affect outward appearance and the quality product of product.For this reason in the early stage of reaction, adopt and at high temperature protect with inert nitrogen gas, material nondiscoloration during to ensure to react.Adopt the method for vacuum in the later stage of reaction, except the moisture that dereaction produces, to make molecular balance carry out to positive dirction, ensure that reaction is carried out completely, making product acid number reach requirement.
After temperature of reaction is determined, in the different reaction times, the final acid value of product and the final color and luster of product are had a great impact.Groped by a large amount of tests, finally determine the acid number of rational reaction times and product.In later stage of reaction in order to reduce the acid number of reactant, adopting vacuum hydro-extraction, making reaction can be more perfect, to the effect reducing product acid number and serve.
Preparation method of the present invention, have technique simple, workable, cost is low, is applicable to the features such as suitability for industrialized production, and after measured, sodium lauroyl lactylate yield is 75%, and the final acid number of product is 35-55.
Embodiment
Embodiment one:
The sodium hydroxide solution that concentration is 50% is mixed with by after the sodium hydroxide dissolved in purified water of 1.03 molal weights, progressively drop in the lactic acid of 1 molal weight when room mild stirring and react, the Sodium.alpha.-hydroxypropionate concentration generated is the solution of 60%, pass into nitrogen at material interface when sodium lactate solution being heated to 80 DEG C and continue computer heating control at 190-210 DEG C, add the lauric acid of 1.2 molal weights and the catalyzer sodium hydroxide of 0.011 molal weight again, vacuumize after reaction 60min and react 20min again, cooling, whitely to light yellow solid and sodium lauroyl lactylate dry, after measured, sodium lauroyl lactylate yield is 75%, the final acid number of product is 35-55.
Embodiment two: the physico-chemical property of osmanthus acyl lactylate and quality index
Product is that waxy, white is to light yellow solid material.Fusing point 73-77 DEG C.There is caramel smell.Dispersible and form gel in water and glycerine.Hydrophile-lipophile balance value (HLB) is 10-12, in aqueous in stable emulsion, is oil-in-water (O/W) type emulsifying agent.Have obvious water-absorbent, and have significantly water-disintegrable and thermo-sensitivity, under acid/base catalysis, hydrolysis generates lauric acid, lactic acid or corresponding salt.Under thermal load, acid number increases and can blackening.Strong interaction can be there is with protein, can also interact with amylose starch and form insoluble mixture, thus can age of starch be suppressed and keep the freshness of bake.
The quality index of sodium lauroyl lactylate:
Sodium content: 3.3-6.5%
Total lactic acid: 42.0-48.0%
Acid number: 35.0-55.0
Ester value: 180-220
Arsenic value :≤0.0003%
Heavy metal :≤0.0010%
Above index all meets by FAO/WHO specified requirement.

Claims (4)

1. the preparation method of sodium lauroyl lactylate, comprises the following steps:
Sodium hydroxide solution is mixed with by after sodium hydroxide dissolved in purified water, progressively drop to when room mild stirring in lactic acid and carry out reaction generation sodium lactate solution, pass into nitrogen at material interface when sodium lactate solution being heated to 80 DEG C and continue computer heating control at 190-210 DEG C, add lauric acid and catalyzer, vacuumize after reaction 60min and react 20min again, cooling, whitely to light yellow solid and sodium lauroyl lactylate dry.
2. the preparation method of sodium lauroyl lactylate as claimed in claim 1, it is characterized in that the mol ratio of described lactic acid and sodium hydroxide is 1:1.03, concentration of lye is 50%, and the method adopting alkali lye to drip is reacted.
3. the preparation method of sodium lauroyl lactylate as claimed in claim 1, is characterized in that described Sodium.alpha.-hydroxypropionate and lauric mol ratio are 1:1.2.
4. the preparation method of sodium lauroyl lactylate as claimed in claim 1, it is characterized in that described catalyzer is sodium hydroxide, add-on is for reaction-ure mixture 0.35%.
CN201410569935.1A 2014-10-23 2014-10-23 Preparation method of sodium lauroyl lactate Pending CN104326908A (en)

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CN104326908A true CN104326908A (en) 2015-02-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111072471A (en) * 2019-12-13 2020-04-28 中国日用化学研究院有限公司 Preparation method of fatty acyl lactic acid or salt thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111072471A (en) * 2019-12-13 2020-04-28 中国日用化学研究院有限公司 Preparation method of fatty acyl lactic acid or salt thereof
CN111072471B (en) * 2019-12-13 2022-07-29 中国日用化学研究院有限公司 Preparation method of fatty acyl lactic acid or salt thereof

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Application publication date: 20150204