CN104448032B - A kind of method of extracting sodium alginate from brown alga - Google Patents
A kind of method of extracting sodium alginate from brown alga Download PDFInfo
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- CN104448032B CN104448032B CN201410698334.0A CN201410698334A CN104448032B CN 104448032 B CN104448032 B CN 104448032B CN 201410698334 A CN201410698334 A CN 201410698334A CN 104448032 B CN104448032 B CN 104448032B
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Abstract
The present invention relates to marine chemical industry field of engineering technology, specifically a kind of method of extracting ultra-low viscosity sodium alginate from brown alga. Dry brown alga or fresh brown alga are added in excessive water, under 20-100 DEG C, stirring condition, soak 0.5-24h and carry out pretreatment; Then, at 30-120 DEG C, under 0.1MPa-1.5MPa pressure, react 20min-3h, after reaction, liquid-solid separation, adds sodium carbonate liquor to extract the ultra-low viscosity sodium alginate that obtains 1-100mPa.S rotary viscosity in solid phase. Utilizing the sodium alginate product that the present invention obtains is ultra-low viscosity sodium alginate, and the viscosity of 1% solution and water approach, and its molecular weight is extremely low, thereby has special medical care effect. Can be for the aspect such as health drink, food.
Description
Technical field
The present invention relates to marine chemical industry field of engineering technology, specifically a kind of method of extracting ultra-low viscosity sodium alginate from brown alga.
Background technology
Sodium alginate is as a kind of polysaccharide carbohydrate extracting the marine alga such as sea-tangle or sargassum from brown algae, as a kind of natural high molecular substance with its good biological degradability and biocompatibility, and good thickening property, film forming, stability, flocculability and chelating and be widely used in the fields such as chemistry, biology, medicine, food. In the U.S., sodium alginate is described as " marvellous food additives ", is described as " life prolonging food " in Japan, and the states such as Britain, Norway and Southeast Asia are widely used in food industry by sodium alginate. Due to sodium alginate have antitumor, regulate immunocompetence, eliminate free radical and anti-oxidant, lipidemia, the effect such as reduction blood sugar, opposing radiation, therefore, it is also obtaining related scientific research personnel's attention aspect medicine and medical material.
China's sodium alginate output accounts for 40% left and right of Gross World Product, occupies first place in the world. And increasing progressively year by year. Current international sodium alginate volume of trade is about 2.2 ten thousand tons, and company's sales volume of the U.S. and Norway accounts for 71%, and the aggregate demand of international sodium alginate will increase substantially. Therefore, China's sodium alginate is produced and also must be added significantly, but also focus should be placed on and improve in quality, increase kind. More for the sodium alginate research of medium viscosity, high viscosity and hyperviscosity at present, because this part produce market demand is large, economic worth is high, and less for the sodium alginate research of low viscosity and ultra-low viscosity.
Summary of the invention
The object of the invention is to provide a kind of method of extracting ultra-low viscosity sodium alginate from brown alga.
The technical solution used in the present invention is for achieving the above object:
From brown alga, extract a method for sodium alginate, dry brown alga or fresh brown alga are added in excessive water, 20-100 DEG C, carry out pretreatment to soak 0.5-24h under the mixing speed of 50-300 rev/min; Then, at 30-120 DEG C, under 0.1MPa-1.5MPa pressure, react 20min-3h, after reaction, liquid-solid separation, adds sodium carbonate liquor to extract the ultra-low viscosity sodium alginate that obtains 1-100mPa.S rotary viscosity in solid phase.
Described brown alga mixes with the ratio that water is 1:1-1:50 in mass ratio.
Described brown alga is one or more in sea-tangle, bulk kelp, yellow tang, bladder-wrack, sargassum.
The present invention has advantages of:
Compared with prior art, the present invention directly prepares ultra-low viscosity sodium alginate from brown alga, instead of first obtain high viscosity sodium alginate, and then degrade and obtain, simplify production stage, and production process is without the interpolation of chemical reagent, green non-pollution, the ultra-low viscosity sodium alginate product obtaining, the viscosity of its 1% solution product and water approach, its molecular weight is extremely low, thereby has special medical care effect. Can be for the aspect such as health drink, food.
Detailed description of the invention
Embodiment 1
Get dry sea-tangle (LaminariaJaponica) 20g, add 300ml distilled water, 70 DEG C are soaked while stirring and within 8 hours, carry out pretreatment; Then at 100 DEG C, under 0.1MPa pressure, react 20min, after reaction, filter and carry out liquid-solid separation, in solid phase, add sodium carbonate liquor to extract the ultra-low viscosity sodium alginate that obtains 70mPa.S rotary viscosity according to traditional approach, the sodium alginate obtaining is dried, weigh, quality is 4.6g, and productive rate is 23%.
According to existing usual manner, do not adopt above-mentioned pretreatment directly to extract above-mentioned sea-tangle, the productive rate obtaining is 18%.
Embodiment 2
Get dry yellow tang (Ascophyllummackaii) 30g, add 300ml distilled water, 90 DEG C are soaked while stirring and within 6 hours, carry out pretreatment; Then, at 110 DEG C, under 0.5MPa pressure, react 1h, after reaction, filter and carry out liquid-solid separation, in solid phase, add sodium carbonate liquor to extract the ultra-low viscosity sodium alginate that obtains 50mPa.S rotary viscosity according to traditional approach, the sodium alginate obtaining is dried, weigh, quality is 7.5g, and productive rate is 25%.
According to existing usual manner, do not adopt above-mentioned pretreatment directly to extract above-mentioned yellow tang, the productive rate obtaining is 18%.
Embodiment 3
Get bulk kelp (Lessoniatrabeculata) 20g, add 600ml distilled water, 100 DEG C are soaked while stirring and within 10 hours, carry out pretreatment; Then, at 110 DEG C, under 1.5MPa pressure, react 2h, after reaction, filter and carry out liquid-solid separation, in solid phase, add sodium carbonate liquor to extract the ultra-low viscosity sodium alginate that obtains 30mPa.S rotary viscosity according to traditional approach, the sodium alginate obtaining is dried, weigh, quality is 8g, and productive rate is 40%.
According to existing usual manner, do not adopt above-mentioned pretreatment directly to extract above-mentioned bulk kelp, the productive rate obtaining is 33%.
Embodiment 4
Get sargassum (Sargassumthunbergii) 20g, add 1000ml distilled water, 40 DEG C are soaked while stirring and within 12 hours, carry out pretreatment; Then, at 115 DEG C, under 1.0MPa pressure, react 3h, after reaction, filter and carry out liquid-solid separation, in solid phase, add sodium carbonate liquor to extract the ultra-low viscosity sodium alginate that obtains 40mPa.S rotary viscosity according to traditional approach, the sodium alginate obtaining is dried, weigh, quality is 8g, and productive rate is 40%.
According to existing usual manner, do not adopt above-mentioned pretreatment directly to extract above-mentioned sargassum, the productive rate obtaining is 30%.
Claims (3)
1. a method of extracting sodium alginate from brown alga, is characterized in that: by dry brown alga or freshBrown alga is added in excessive water, soaks 0.5-24h and carry out pretreatment under 20-100 DEG C, stirring condition;Then, at 30-120 DEG C, under 0.1MPa-1.5MPa pressure, react 20min-3h, after reaction, liquid-solid pointFrom, in solid phase, add sodium carbonate liquor to extract the ultra-low viscosity brown alga that obtains 1-100mPa.S rotary viscosityAcid sodium.
2. by the method for extracting sodium alginate from brown alga claimed in claim 1, it is characterized in that: instituteStating dry brown alga or fresh brown alga is that the ratio that is greater than 1:1 to 1:50 is mixed with water in mass ratio.
3. by the method for extracting sodium alginate from brown alga claimed in claim 1, it is characterized in that:Described brown alga is one or more in sea-tangle, bulk kelp, yellow tang, bladder-wrack, sargassum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410698334.0A CN104448032B (en) | 2014-11-26 | 2014-11-26 | A kind of method of extracting sodium alginate from brown alga |
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| CN201410698334.0A CN104448032B (en) | 2014-11-26 | 2014-11-26 | A kind of method of extracting sodium alginate from brown alga |
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| CN104448032A CN104448032A (en) | 2015-03-25 |
| CN104448032B true CN104448032B (en) | 2016-05-25 |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060938B (en) * | 2010-12-24 | 2012-10-17 | 青岛明月海藻集团有限公司 | Method for extracting algin through comprehensively utilizing brown algae |
| CN103360509B (en) * | 2013-07-16 | 2016-08-10 | 山东洁晶集团股份有限公司 | Alginic acid and the method for alginic acid salt is prepared for raw material with fresh sargassum |
| CN103665183A (en) * | 2013-12-18 | 2014-03-26 | 青岛福创环境科技有限公司 | Producing method of sodium alginate with ultralow viscosity |
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