CN1800220A - Chitin colloid preparation method - Google Patents
Chitin colloid preparation method Download PDFInfo
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- CN1800220A CN1800220A CN 200510006611 CN200510006611A CN1800220A CN 1800220 A CN1800220 A CN 1800220A CN 200510006611 CN200510006611 CN 200510006611 CN 200510006611 A CN200510006611 A CN 200510006611A CN 1800220 A CN1800220 A CN 1800220A
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- chitin
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- colloid preparation
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- glue
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Abstract
The invention relates to a method for preparing for chitin colloidal matter. It comprises the following steps: mixing the chitin with the concentrated inorganic acid to prepare for chitin acid solution, adding the chitin acid solution into the water or base solution to prepare for gelatineous solution, separating the chitin and the inorganic fertilizer with chitin oligosaccharide, using water to wash the chitin glue.
Description
Technical field
The present invention relates to a kind of chitin, especially a kind of chitin colloid preparation method.
Background technology
Commercially available chitin is insoluble in the general aqueous solution, the good substrates that its physical properties (structure) neither chitinase (being).Thereby people are changed chitin into chitin colloid, use lytic enzyme (comprising chitinase) that chitin colloid is hydrolyzed to chitin oligo saccharide then, are used again.Therefore, make chitin colloid and just become an important step of producing chitin oligo saccharide.
The preparation method of existing chitin glue has phosphoric acid method and sulfuric acid process etc.Its basic skills is (referring to document: Zhou Ying, the clone of Aeromonas caviae CB101 chitinase gene and the functional study of expression and enzyme fragment thereof, master thesis, Xiamen University, 2002) be that chitin is dissolved in the concentrated acid, with a large amount of water dilutions, original dissolved chitin is come out with colloidal precipitation then.For removing residual acid, need with a large amount of water washing chitin glue.The main drawback of this method is not only to waste great amount of water resources, and produces a large amount of acid waste liquids, causes serious pollution.Moreover the solvable chitin oligosaccharide that chitin is produced under the strong acid effect also runs off along with water washing in vain.If chitin glue is precipitated out, then need increase the cost of alkali lye with neutralisation.For above-mentioned reasons, chitin glue suitability for industrialized production in a large number so far.
Summary of the invention
But the present invention aims to provide a kind of conserve water resource, does not cause environmental pollution, makes full use of by product, reduces production costs, and is suitable for the chitin colloid preparation method of large-scale industrial production.
Because to chitin, institute such as chitosan, oligochitosan, chitin oligo saccharide is the composition of finger definitely in the existing document, its chaos of conception, each used among the present invention nominal definition is as follows:
Chitin: the deacetylation that refers to high-polymerization degree is at 10%～30% polymerization N-acetyl-2 amino-2 DDG and the polysaccharide that connects with β-1,4 glycosidic link form.
Chitosan: refer to chitin after the concentrated base heat treated, the high poly-glucosamine polysaccharide of its deacetylation＞50%.
Oligochitosan: the polymerization degree that refers to deacetylation＞50% is 2～10 polymerization glucosamine.
Chitin oligo saccharide: the polymerization degree that refers to deacetylation＜50% is 2～10 polymerization acetylglucosamine.
Step of the present invention is:
1), chitin is mixed with dense mineral acid, make the chitin acid solution, by weight with volume proportion, chitin (Kg): mineral acid (L)=1: (8～20), preferred chitin (Kg): mineral acid (L)=1: 10; Said dense mineral acid is any in phosphoric acid, sulfuric acid or the hydrochloric acid etc., and phosphoric acid concentration is 60%～85%, and sulfuric acid concentration is 60%～98%, and concentration of hydrochloric acid is 20%～35%;
2), the chitin acid solution is added drop-wise in water or the alkaline solution, make its colloidal precipitation, become Colloidal fluid; Said alkali lye is selected from a kind of in ammoniacal liquor, potash, the soda etc.; Said potash is selected from a kind of in potassium hydroxide, salt of wormwood, the saleratus etc., and said soda is selected from a kind of in sodium hydroxide, yellow soda ash, the sodium bicarbonate etc.;
3), chitin glue is separated with the inorganic salt fertilizer that contains the chitin oligosaccharide;
4), the chitin glue after will separating washes with water, promptly gets chitin colloid.
In above-mentioned steps 2) in, in chitin acid solution and alkali lye mixing N-process, be preferably under the ultrasonic wave and carried out, be about to the chitin acid solution and be added drop-wise in the ultrasonic cleaner.
In step 3), said separation can be selected filtration, press filtration or method such as centrifugal for use, in filtration, press filtration or centrifugal process, preferably heats, and temperature is 40～60 ℃.Or in utilizing and the time the timely processing of exothermic phenomenon also can the people for heating.With 40～60 ℃ in warm water the salt that is attached in the chitin colloid is dissolved as early as possible, also make the mineral manure concentration height that contains chitin oligo saccharide that washs.Reduce the cost of these fertilizer of transportation.
Compare with existing literature method, major advantage of the present invention is: 1. in producing chitin glue process, waste liquid is become fertilizer be used; 2. saved great amount of water resources; 3. its by product-chitin oligosaccharide can be used as biological pesticide, makes full use of resource; 4. do not cause environmental pollution; 5. reduced production cost, made the large-scale commercial production of chitin glue become possibility; 6. by carrying out in the groove that is placed on ultrasonic cleaner at chitin solution and alkali lye mixing N-process.Make the chitin colloid that comes in the ultra-sonic oscillation environment of peak power, micelle is little and loose, and enzyme is cut effective.
Embodiment
Embodiment 1
Get the commercially available chitin of 10Kg (chitin is good with fine particle, 〉=10 orders), be dissolved in the industrial strong phosphoric acid of 100L (75%), under the normal temperature,, generate the chitin phosphoric acid solution through stirring, the dissolving of 12h.Under agitation gradually the chitin phosphoric acid solution is joined in the industrial strong aqua (～21%) of 220L, make to be neutralized to pH6.5～6.Neutralization back chitin is separated out with glue, and press filtration while hot (or centrifugal) makes it to separate with dense ammonium phosphate salt.The chitin glue of gained washes out the salt that remains in the glue with hot water, and this washings joins in the ammonium phosphate solution after the press filtration, is the ammophos that contains soluble chitin oligo saccharide.This glue can be used as the substrate of chitinase (being), should preserve under hygrometric state.
Embodiment 2
Get the commercially available chitin of 10Kg (chitin is good with fine particle, 〉=10 orders), be dissolved in the industrial strong phosphoric acid of 80L (85%), under the normal temperature,, generate the chitin phosphoric acid solution through stirring, the dissolving of 12h.Getting industrial strong aqua 200L is incorporated in the 200L pure water, again chitin solution is added in the ammoniacal liquor after the dilution gradually, after being neutralized into pH and being 5～6, the chitin glue of separating out separates chitin glue with filtering centrifuge (be centrifugal basket drier, or tubular type continuous flow centrifuge).The ammonium phosphate solution that collection contains the chitin oligosaccharide is fertilizer/agricultural chemicals.Chitin glue is washed out the ammonium phosphate salt that remains in the glue with small amount of thermal, is product chitin glue.
Embodiment 3
Get the commercially available chitin of 10Kg (chitin is good with fine particle, 〉=10 orders), be dissolved in the industrial strong phosphoric acid of 150L (60%), in the PE jar of 90 ℃ of insulations, stir 2h, chitin is dissolved in the phosphoric acid, gets the solution 200L that industrial potassium hydroxide is mixed with 5.5M concentration.Under agitation be about 6.5 making it to be neutralized to pH in the chitin solution adding alkali lye lentamente.The chitin colloid of separating out gets chitin glue after separating; Use this glue of a spot of hot wash again, be product (chitin glue), and isolated solution is potassium, the phosphatic manure that contains chitin oligo saccharide.This fertilizer can with the nitrogenous fertilizer fit applications.
Embodiment 4
Similar to Example 1, its difference is that mineral acid adopts the vitriol oil (98%) of 80L, under the normal temperature, through stirring, the dissolving of 12h, generates the chitin sulphuric acid soln.Be preferably under the ultrasonic wave in chitin solution and the sodium hydroxide solution mixing N-process and carry out, be about to the chitin acid solution and be added drop-wise in the ultrasonic cleaner, and heat when press filtration to 40～60 ℃, pH is 6.5.
Embodiment 5
Similar to Example 1, its difference is that mineral acid adopts the vitriol oil (80%) of 120L, in the PE jar of 60 ℃ of insulations, stir 2h, chitin is dissolved in the sulfuric acid, under ultrasonic wave, carries out in chitin solution and the dense sodium carbonate solution mixing N-process, be about to the chitin acid solution and be added drop-wise in the ultrasonic cleaner, being neutralized into pH is 5～6, and remaining step together
Embodiment 2.
Embodiment 6
Similar to Example 2, its difference is that mineral acid adopts the sulfuric acid (60%) of 180L, in the PE jar of 60 ℃ of insulations, stir 4h, chitin is dissolved in the sulfuric acid, under ultrasonic wave, carry out in chitin solution and the dense solution of potassium carbonate mixing N-process, being about to the chitin acid solution is added drop-wise in the ultrasonic cleaner, being neutralized into pH is 5～6, press filtration, and remaining step is with embodiment 2.
Embodiment 7
Similar to Example 2, its difference is that mineral acid adopts the concentrated hydrochloric acid (hydrochloric amount 〉=35%) of 120L, in the PE jar of 40 ℃ of insulations, stir 2h, chitin is dissolved in the hydrochloric acid, chitin solution and dense potassium bicarbonate solution mixing N-process can be placed in the groove of ultrasonic cleaner and carry out, and remaining step is with embodiment 2.
Embodiment 8
Similar to Example 2, its difference is that mineral acid adopts the hydrochloric acid (hydrochloric amount 〉=20%) of 200L, in the PE jar of 60 ℃ of insulations, stir 4h, chitin is dissolved in the hydrochloric acid, can carries out under ultrasonic wave in chitin solution and the strong aqua mixing N-process, remaining step is with embodiment 2.
Claims (10)
1, chitin colloid preparation method is characterized in that the steps include:
1), chitin is mixed with dense mineral acid, make the chitin acid solution, by weight with volume proportion, chitin (Kg): mineral acid (L)=1: (8～20);
2), the chitin acid solution is added drop-wise in water or the alkaline solution, make its colloidal precipitation, become Colloidal fluid;
3), chitin glue is separated with the inorganic salt fertilizer that contains the chitin oligosaccharide;
4), the chitin glue after will separating washes with water, promptly gets chitin colloid.
2, chitin colloid preparation method as claimed in claim 1 is characterized in that by weight and volume proportion, chitin (Kg): mineral acid (L)=1: 10.
3, chitin colloid preparation method as claimed in claim 1 is characterized in that said dense mineral acid is any in phosphoric acid, sulfuric acid or the hydrochloric acid.
4, chitin colloid preparation method as claimed in claim 3 is characterized in that said concentration of phosphoric acid is 60%～85%.
5, chitin colloid preparation method as claimed in claim 3 is characterized in that said vitriolic concentration is 60%～98%.
6, chitin colloid preparation method as claimed in claim 3, the concentration that it is characterized in that said hydrochloric acid is 20%～35%.
7, chitin colloid preparation method as claimed in claim 1 is characterized in that said alkali lye is selected from a kind of in ammoniacal liquor, potash, the soda.
8, chitin colloid preparation method as claimed in claim 7 is characterized in that said potash is selected from a kind of in potassium hydroxide, salt of wormwood, the saleratus; Said soda is selected from a kind of in sodium hydroxide, yellow soda ash, the sodium bicarbonate.
9, chitin colloid preparation method as claimed in claim 1 is characterized in that said separation selects filtration, press filtration or centrifugal method for use.
10, chitin colloid preparation method as claimed in claim 1 is characterized in that having under the ultrasonic wave in chitin acid solution and alkali lye mixing N-process and carries out, and is about to the chitin acid solution and is added drop-wise in the ultrasonic cleaner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100066118A CN100410277C (en) | 2005-01-05 | 2005-01-05 | Chitin colloid preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100066118A CN100410277C (en) | 2005-01-05 | 2005-01-05 | Chitin colloid preparation method |
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| CN1800220A true CN1800220A (en) | 2006-07-12 |
| CN100410277C CN100410277C (en) | 2008-08-13 |
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| CNB2005100066118A Expired - Fee Related CN100410277C (en) | 2005-01-05 | 2005-01-05 | Chitin colloid preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104017228A (en) * | 2014-06-20 | 2014-09-03 | 安徽工程大学 | Preparation process of chitin colloid |
| CN109734782A (en) * | 2019-01-23 | 2019-05-10 | 大连工业大学 | A kind of expansin and its application in chitin colloid preparation |
| CN111690589A (en) * | 2020-07-15 | 2020-09-22 | 云南大学 | Culture medium capable of improving activity of chitinase of hirsutella sinensis mycelia |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930722B2 (en) * | 1981-09-30 | 1984-07-28 | 工業技術院長 | Method for producing powdery porous chitosan |
| JPS5911190A (en) * | 1982-07-07 | 1984-01-20 | Snow Brand Milk Prod Co Ltd | Novel oligosaccharide, its preparation, propagation promotor for bifidobacterium comprising oligosaccharide as active ingredient |
| JPS61271296A (en) * | 1985-05-28 | 1986-12-01 | Kyogyo Kumiai N F I | Production of n-acetylchito-oligosaccharide |
| TW273579B (en) * | 1994-11-30 | 1996-04-01 | China Textile Inst | Method to use chitin as starch agent for warping |
| CN1411805A (en) * | 2001-10-11 | 2003-04-23 | 北京中科天鹤生物技术有限公司 | Biological medicine film and its preparation method |
| CN1431021A (en) * | 2003-01-21 | 2003-07-23 | 周赤 | Biological sponge for treating gynecological diseases and production method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104017228A (en) * | 2014-06-20 | 2014-09-03 | 安徽工程大学 | Preparation process of chitin colloid |
| CN104017228B (en) * | 2014-06-20 | 2016-05-25 | 安徽工程大学 | A kind of preparation technology of chitin colloid |
| CN109734782A (en) * | 2019-01-23 | 2019-05-10 | 大连工业大学 | A kind of expansin and its application in chitin colloid preparation |
| CN111690589A (en) * | 2020-07-15 | 2020-09-22 | 云南大学 | Culture medium capable of improving activity of chitinase of hirsutella sinensis mycelia |
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| Publication number | Publication date |
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| CN100410277C (en) | 2008-08-13 |
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