CN1215139C - Method for increasing gelatin transparency - Google Patents
Method for increasing gelatin transparency Download PDFInfo
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- CN1215139C CN1215139C CN 03112541 CN03112541A CN1215139C CN 1215139 C CN1215139 C CN 1215139C CN 03112541 CN03112541 CN 03112541 CN 03112541 A CN03112541 A CN 03112541A CN 1215139 C CN1215139 C CN 1215139C
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Abstract
The present invention relates to a method for increasing gelatin transparency, which is characterized in that a clarification procedure is added before concentration. Polyacrylamide taken as a flocculating agent and activated clay taken as an adsorbing agent are added into a gelatin solution, are stirred at the uniform temperature and then are settled for some time in the working procedures. By now, the impurities in the gelatin solution are combined with the adsorbing agent into compact flocs in integrated bulks to precipitate or float under the action of the flocculating agent, and are thoroughly separated from the gelatin solution. The present invention has the result that the gelatin with light colors and high transparency is obtained so as to fundamentally solve the transparency problem of the gelatin. The present invention has obvious effects on increasing the transparency of the gelatin in the last one procedure and the last two procedures and has obvious economic benefits.
Description
Technical field
The invention belongs to the field of purification of gelatin, the present invention specifically relates to produce a kind of method of high clear gelatin.
Technical background
Gelatin is a kind of protein that comes out from knot hoof tissue or the collagen partial hydrolysis the face tissue of animal.Difference by raw material can be divided into bone gelatin(e) and skin gelatin, can be divided into photographic gelatin, medical gelatin, edible Gelatinum oxhide and technical gelatine by the difference of purposes, can be divided into acid process gelatin, alkaline process gelatin and enzyme process gelatin etc. by the difference to the raw material treatment process.Gelatin has many good physics and chemical property, but strong as wetting ability, film forming properties good, inverse conversion, side-chain radical reactive behavior height, the electric charge symbol that can form jelly, gel and colloidal sol presents both sexes etc. with the variation of medium pH value.Just because of these advantages, gelatin be applied in widely biotechnology (carrier of immobilized enzyme), biological chemistry (a kind of mould albumen), field of medicaments (suppository, sugar-coat, microcapsule), foodstuffs industry (jelly, emulsification, stable, sticking and, clarification), fields such as the flotation of photographic chemistry industry (one of three big raw materials of film) and mineral products, printing, electrolysis, rubber.In these Application Areass, the transparency of gelatin is one of important quality index beyond doubt, the transparency of having only abundant raising gelatin, could improve the use class of gelatin, the height of use class is determining the economic worth of gelatin, and for example: the price of food grade gelatin is more than 3 times of technical grade gelatin.How to improve the transparency of gelatin, be the important topic that the gelatin industry is paid close attention to always, but never breakthrough up to the present.Manufacturing of gelatin is the treating processes of long physics of one-period and chemistry.Generally skin and the bone with animal is raw material, technology premenstruum (particle, degreasing, pickling, caustic dip etc.) is handled, after removing inanimate matter and part noncollagen protein and carbohydrate raw material fully being expanded, again through propose glue, filtration, concentrate, freeze forming and drying, obtain the commodity gelatin at last.The difference that has finally caused the difference, particularly level of transparency of the quality of gelatin because of the difference of raw material and technology.To improving this problem of transparency of gelatin, the technician of gelatin industry once did unremitting research.One of them is handled for adding aluminium salt or phosphoric acid salt in glue are warmed to more than 90 ℃ under alkaline condition.The gelatin that obtains in this way, though its aqueous solution has certain transparency, adularescent particle in the dried glue of commodity, the ash height, this is that residual soluble salt causes when handling, this is that a kind of vacation is transparent.In addition, this method is to the viscosity of gelatin and freeze power tangible destruction is arranged, simultaneously the yield also lower (being no more than 70%) of commercially available glue.Therefore, the economic benefit of this method in industrial production is little.It is two for adopting combination ion exchange resin to handle, and to reduce ash very effective though this method is to removing metal ion, for the DeGrain of enhancing the transparency, particularly invalid especially to there not being transparent gelatin.Because influence the major cause of gelatin transparency is insoluble particle.Its three, the someone advocates to utilize hollow-fibre membrane to force to filter and enhances the transparency, this method only has the laboratory meaning, is difficult to carry out large-scale industrial production.How adopting cost-effective method thoroughly to improve the transparency of gelatin in large-scale industrial production, is a current problem that needs to be resolved hurrily.
Summary of the invention
The present invention is exactly a kind of method that designs in order thoroughly to improve the transparency of gelatin, its principle is to utilize the method that " crane span structure " acts on and physical adsorption combines of polyacrylamide flocculation to make the fine particle in the glue be agglomerated into big floc sedimentation, makes the floc sedimentation precipitation then or suspends and thoroughly improve the transparency of gelatin.Particularly the transparency that improves later each the passage glue in two roads had significant effect and tangible economic benefit.
The present invention adopts following method to realize.The adding polyacrylamide is clarified in the gelatin solution after carrying glue (or with commodity gelatin preparation), and the concrete operations step is as follows:
A, in the aqueous gelatin solution of 1%-20%, to add cationic degree be that 1%-80%, molecular weight are the cationic-type polyacrylamide more than 5,000,000 while stir, the weight of adding is the 0.1%-1% of absolute dried glue weight.
B, adjust temperature, stir and stop after 1-30 minute, leave standstill up to abundant precipitation at 35-95 ℃.
After filtering, C, clear glue solution, obtain the commodity gelatin at last through concentrated, freeze forming, drying process.
In aqueous gelatin solution, add before the cationic-type polyacrylamide, add the atlapulgite that weight is no more than contained absolute dried glue weight 50% in the glue while stirring.
After the adding cationic-type polyacrylamide, before the step B, adding degree of hydrolysis again is that 10%-30%, molecular weight are the anion-polyacrylamide more than 5,000,000, and the weight of adding is no more than 0.4% of absolute dried glue weight.
The concentration of above-mentioned aqueous gelatin solution is 1%-10%.
The consumption of above-mentioned atlapulgite is no more than 30% of absolute dried glue weight.
The degree of hydrolysis of above-mentioned anionic polyacrylamide is 10%-30%, and molecular weight is more than 8,000,000, and consumption is to be no more than 0.2% of absolute dried glue weight, and working concentration is 0.1%-0.3%.
This method has the following advantages compared with the prior art:
1, the transparency and the ash of the commodity gelatin that obtains after this method is handled all reach more than the existing national standard A level of edible Gelatinum oxhide, i.e. transparency 〉=300mm, ash≤1%.
2, the performance to gelatin does not have detrimentally affect, particularly to freezing power and viscosity without any destruction.
3, all raw materials of adding with precipitation or floating of the impurity in the gelatin, do not enter glue at last, and the gained gelatin is relatively pure.
4, the beds of precipitation or floating layer are fine and close whole shape, and wherein contained glue is few, separate thoroughly with gelatin solution, so the yield height of commercially available glue, generally about 90%.
5, equipment is simple, operating speed is fast, utilize waste heat need not heat, not influence normal production process.
6, cost is low.The general raw materials cost of handling one ton of commercially available glue is no more than 400 yuans
7, do not change the original pH value of gelatin.
Embodiment
Embodiment 1:
With the alkaline process skin gelatin is example, after cladding enters factory, carries glue (be generally a plurality of passages and carry glue) through washing, liming (alkali) neutralization, washing back dress pot, passes through operations such as freeze forming, drying again, obtains the commodity gelatin at last.Method of the present invention is carried out after carrying glue, and concrete steps are as follows:
At first be 50% with cationic degree, molecular weight is mixed with 0.2% the aqueous solution greater than 1,000 ten thousand food grade cationic-type polyacrylamide; With degree of hydrolysis be 30%, molecular weight is mixed with 0.1% the aqueous solution greater than 1,500 ten thousand food grade anion-polyacrylamide; Above-mentioned two kinds of aqueous solution are prepared under natural room temperature, and temperature should not surpass 45 ℃, while stirring polyacrylamide is sprinkled in the water, and dissolution time is no less than 2 hours.After preparing above-mentioned two kinds of polyacrylamide solutions, get gel content and be 10 tons of 5% extreme trace glues (also can with the preparation of commodity gelatin), adjust temperature to 50 ℃-80 ℃, feed intake while stir by one of following four schemes:
A) add atlapulgite 100KG, add above-mentioned cationic-type polyacrylamide solution 400KG, add above-mentioned anion-polyacrylamide solution 100KG.
B) add atlapulgite 100KG, add above-mentioned cationic-type polyacrylamide solution 600KG.
C) add above-mentioned cationic-type polyacrylamide solution 500KG, add above-mentioned anion-polyacrylamide solution 100KG.
D) add above-mentioned cationic-type polyacrylamide solution 600KG.
After feeding intake and stir according to one of above-mentioned cubic case, stop to stir, left standstill 10-60 minute, the impurity in the glue is thoroughly precipitated, get clear glue solution and filter, both can obtain the good commodity gelatin of transparency through operations such as freeze forming, dryings again.
Embodiment 2:
With the acid system skin gelatin is example, after cladding enters factory, carries glue (be generally a plurality of passages and carry glue) through dress pot after washing, pickling, neutralization, the washing, passes through operations such as freeze forming, drying again, obtains the commodity gelatin at last.Method of the present invention is carried out after carrying glue, and concrete steps are as follows:
At first be 20% with cationic degree, molecular weight is mixed with 0.2% the aqueous solution greater than 1,000 ten thousand food grade cationic-type polyacrylamide; With degree of hydrolysis be 10%, molecular weight is mixed with 0.1% the aqueous solution greater than 1,500 ten thousand food grade anion-polyacrylamide; Above-mentioned two kinds of aqueous solution are prepared under natural room temperature, and temperature should not surpass 45 ℃, while stirring polyacrylamide is sprinkled in the water, and dissolution time is no less than 2 hours.After preparing above-mentioned two kinds of polyacrylamide solutions, get gel content and be 10 tons of 3% extreme trace glues (also can with the preparation of commodity gelatin), adjust temperature to 50 ℃-80 ℃, feed intake while stir by one of following four schemes:
A) add atlapulgite 90KG, add above-mentioned cationic-type polyacrylamide solution 300KG, add above-mentioned anion-polyacrylamide solution 100KG.
B) add atlapulgite 90KG, add above-mentioned cationic-type polyacrylamide solution 400KG.
C) add above-mentioned cationic-type polyacrylamide solution 500KG, add above-mentioned anion-polyacrylamide solution 100KG.
D) add above-mentioned cationic-type polyacrylamide solution 300KG.
After feeding intake and stir according to one of above-mentioned cubic case, stop to stir, left standstill 10-60 minute, the impurity in the glue is thoroughly precipitated, get clear glue solution and filter, both can obtain the good commodity gelatin of transparency through operations such as freeze forming, dryings again.
Embodiment 3:
With the alkaline process bone gelatin(e) is example, and after raw material entered factory, the dress pot was carried glue (be generally a plurality of passages and carry glue) after overbreak bone, degreasing, pickling, caustic dip, neutralization, washing, passes through operations such as freeze forming, drying again, obtains the commodity gelatin at last.Method of the present invention is carried out after carrying glue, and concrete steps are as follows:
At first cationic degree 30%, molecular weight are mixed with 0.2% the aqueous solution greater than 1,000 ten thousand food grade cationic-type polyacrylamide; With degree of hydrolysis be 20%, molecular weight is mixed with 0.1% the aqueous solution greater than 1,500 ten thousand food grade anion-polyacrylamide; Above-mentioned two kinds of aqueous solution are prepared under natural room temperature, and temperature should not surpass 45 ℃, while stirring polyacrylamide is sprinkled in the water, and dissolution time is no less than 2 hours.After preparing above-mentioned two kinds of polyacrylamide solutions, get gel content and be 10 tons of 5% extreme trace glues (also can with the preparation of commodity gelatin), adjust temperature to 50 ℃-80 ℃, feed intake while stir by one of following four schemes:
A) add active 100KG, add above-mentioned cationic-type polyacrylamide solution 400KG, add above-mentioned anion-polyacrylamide solution 100KG.
B) add atlapulgite 100KG, add above-mentioned cationic-type polyacrylamide solution 800KG.
C) add above-mentioned cationic-type polyacrylamide solution 500KG, add above-mentioned anion-polyacrylamide solution 100KG.
D) add above-mentioned cationic-type polyacrylamide solution 600KG.
After feeding intake and stir according to one of above-mentioned cubic case, stop to stir, left standstill 10-60 minute, the impurity in the glue is thoroughly precipitated, get clear glue solution and filter, both can obtain the good commodity gelatin of transparency through operations such as freeze forming, dryings again.
Embodiment four
At first be 50% with cationic degree, molecular weight is mixed with 0.2% the aqueous solution greater than 1,000 ten thousand food grade cationic-type polyacrylamide; With degree of hydrolysis be 30%, molecular weight is mixed with 0.1% the aqueous solution greater than 1,500 ten thousand food grade anion-polyacrylamide; Above-mentioned two kinds of aqueous solution are prepared under natural room temperature, and temperature should not surpass 45 ℃, while stirring polyacrylamide is sprinkled in the water, and dissolution time is no less than 2 hours.
Get the commercially available no transparent technical grade gelatin of 100 grams, adding water, to be configured to concentration be 5% aqueous gelatin solution, in the time of 60-70 ℃, feeds intake while stir by following four schemes:
1, adds atlapulgite 20 grams, cationic-type polyacrylamide solution 100 grams.
2, add cationic-type polyacrylamide solution 60 grams.
3, add atlapulgite 10 grams, cationic-type polyacrylamide solution 80 grams, anion-polyacrylamide. solution 20 grams.
4, add cationic polyacrylamide solution 50 grams, anion-polyacrylamide solution 10 grams.
After feeding intake and stir according to one of above-mentioned cubic case, stop to stir, left standstill 10-60 minute, the impurity in the glue is thoroughly precipitated, get clear glue solution and filter, both can obtain the good commodity gelatin of transparency through operations such as freeze forming, dryings again.
Adopting different schemes and consumption mainly is how much deciding with use different model polyacrylamide according to impurities in the gelatin.In general, if impurities can not add carclazyte more for a long time in the gelatin, the molecular weight of polyacrylamide is big more, and cationic degree is high more, and consumption is few more.In addition, also will be according to the raw material difference of different manufacturers, the technology difference waits to determine best embodiment.In a word, technical scheme of the present invention is sophisticated to implementing large-scale commercial production.This proves by pilot scale.8 tons of certain factory batch acid system extreme trace liquid, gel content 3% is pressed and is got 220 kilograms of commercially available glues after this method is handled, 350 millimeters of transparencies, 5 ° of E of Engler degree freeze power 97Bloomg, and color and luster is orange-yellow.And the Engler degree of the acid system extreme trace glue of another batch of handling without this method is 5.2 ° of E, and freezing power is 95Bloomg, no transparency, and color and luster is a reddish-brown.
In sum, technique effect of the present invention is significant, and has tangible economic benefit and social benefit, is a kind of novel method that is worthy to be popularized.
Claims (9)
1, a kind of method that improves the gelatin transparency is characterized in that adding polyacrylamide and clarifies in gelatin solution, the concrete operations step is as follows:
A, in the aqueous gelatin solution of 1%-20%, to add cationic degree be that 1%-80%, molecular weight are the cationic-type polyacrylamide more than 5,000,000 while stir, the weight of adding is the 0.1%-1% of absolute dried glue weight;
B, adjust temperature, stir and stop after 1-30 minute, leave standstill up to abundant precipitation at 35-95 ℃;
After filtering, C, clear glue solution, obtain the commodity gelatin at last through concentrated, freeze forming, drying process.
2, according to the said a kind of method that improves the gelatin transparency of claim 1, it is characterized in that in aqueous gelatin solution, adding before the cationic-type polyacrylamide, add the atlapulgite that weight is no more than contained absolute dried glue weight 50% in the glue while stirring.
3, according to claim 1 or 2 said a kind of methods that improve the gelatin transparency, it is characterized in that adding after the cationic-type polyacrylamide, before the step B, adding degree of hydrolysis again is that 10%--30%, molecular weight are the anion-polyacrylamide more than 5,000,000, and the weight of adding is no more than 0.4% of absolute dried glue weight.
4, according to claim 1 or 2 said a kind of methods that improve the gelatin transparency, the concentration that it is characterized in that aqueous gelatin solution is 1%-10%.
5, according to the said a kind of method that improves the gelatin transparency of claim 3, the concentration that it is characterized in that aqueous gelatin solution is 1%-10%.
6, according to the said a kind of method that improves the gelatin transparency of claim 2, it is characterized in that the consumption of atlapulgite is no more than 30% of absolute dried glue weight.
7, according to the said a kind of method that improves the gelatin transparency of claim 3, it is characterized in that the consumption of atlapulgite is no more than 30% of absolute dried glue weight.
8, according to claim 1 or 2 said a kind of methods that improve the gelatin transparency, the cationic degree that it is characterized in that cationic-type polyacrylamide is 20%-50%, molecular weight is more than 8,000,000, and consumption is the 0.2%-0.6% of absolute dried glue, and working concentration is 0.1%-0.5%.
9, according to the said a kind of method that improves the gelatin transparency of claim 3, the degree of hydrolysis that it is characterized in that the anionic polyacrylamide is 10%-30%, molecular weight is more than 8,000,000, and consumption is to be no more than 0.2% of absolute dried glue weight, and working concentration is 0.1%-0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 03112541 CN1215139C (en) | 2003-06-14 | 2003-06-14 | Method for increasing gelatin transparency |
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| CN 03112541 CN1215139C (en) | 2003-06-14 | 2003-06-14 | Method for increasing gelatin transparency |
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| CN1470585A CN1470585A (en) | 2004-01-28 |
| CN1215139C true CN1215139C (en) | 2005-08-17 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102059021B (en) * | 2010-11-03 | 2012-12-05 | 安徽丰原集团有限公司 | Method for improving glutin transparency |
| CN102848798A (en) * | 2012-10-11 | 2013-01-02 | 向国忠 | Manufacturing method of clean chalk |
| CN103788171A (en) * | 2014-01-30 | 2014-05-14 | 方琴 | Decoloration method of dyed gelatin soft capsule shell waste |
| CN103819711A (en) * | 2014-01-30 | 2014-05-28 | 方琴 | Decoloring method of dye gelatin hard capsule shell waste |
| CN106480141A (en) * | 2015-08-28 | 2017-03-08 | 海南盛美诺生物技术有限公司 | A kind of preparation method of collagen |
| CN107296261A (en) * | 2016-04-14 | 2017-10-27 | 宋永升 | A kind of processing method of gelatine leaves |
| CN109370446B (en) * | 2018-12-19 | 2021-09-10 | 潍坊学院 | Method for clarifying gelatin solution by comprehensively utilizing waste residues |
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