CN112825917A - Goat milk degreasing method suitable for goat milk protein fibers - Google Patents

Goat milk degreasing method suitable for goat milk protein fibers Download PDF

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Publication number
CN112825917A
CN112825917A CN202011620004.1A CN202011620004A CN112825917A CN 112825917 A CN112825917 A CN 112825917A CN 202011620004 A CN202011620004 A CN 202011620004A CN 112825917 A CN112825917 A CN 112825917A
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goat milk
solution
milk protein
milk
goat
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CN202011620004.1A
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Inventor
赵志远
黄金洪
张静
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Yibin Spark New Fiber Co ltd
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Yibin Spark New Fiber Co ltd
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Priority to CN202011620004.1A priority Critical patent/CN112825917A/en
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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23CDAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C7/00Other dairy technology
    • A23C7/04Removing unwanted substances other than lactose or milk proteins from milk
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23CDAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C7/00Other dairy technology
    • A23C7/04Removing unwanted substances other than lactose or milk proteins from milk
    • A23C7/043Removing unwanted substances other than lactose or milk proteins from milk using chemicals in liquid or solid state, e.g. flocculating, adsorbing or extracting agents
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23CDAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C7/00Other dairy technology
    • A23C7/04Removing unwanted substances other than lactose or milk proteins from milk
    • A23C7/046Removing unwanted substances other than lactose or milk proteins from milk by centrifugation without using chemicals, e.g. bactofugation; re-use of bactofugate

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Detergent Compositions (AREA)

Abstract

The invention discloses a goat milk degreasing method suitable for goat milk protein fibers, which solves the problem of high fat residual quantity of the degreased goat milk in the prior art. The invention comprises the following steps: step 1: adding a nonionic surfactant into goat milk, stirring, standing to remove an upper layer substance to obtain a solution A; step 2: adding ethanol into the solution A obtained in the step 1, wherein the mass ratio of the added ethanol to the solution A is 5-60%, preserving the heat, and removing the upper layer substances to obtain a solution B; and step 3: and (3) heating the solution B in the step (2) to boil, pumping to remove the upper layer substance, filtering and drying to obtain the goat milk protein. The mass ratio of the nonionic surfactant added in the step 1 to the goat milk is 2-10%; the nonionic surfactant added in the step 1 is one or more of dodecyl diethanolamide, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and dodecyl alkanolamide phosphate. The invention has the advantages of effectively controlling the residual fat amount and the like.

Description

Goat milk degreasing method suitable for goat milk protein fibers
Technical Field
The invention relates to a protein fiber, in particular to a goat milk degreasing method suitable for goat milk protein fiber.
Background
The goat milk proteins are mainly casein and whey proteins. The ratio of casein to whey protein of goat milk, cow milk and human milk is approximately 75: 25. the milk contains 85: 15. human milk is 60: 40. therefore, the goat milk has lower casein content and higher whey protein content than cow milk, and has the content similar to that in human milk. Casein can form larger coagula under the action of gastric acid, and the higher the content of casein, the lower the protein digestion, so the digestibility of goat milk protein is higher than that of cow milk. The mineral content of goat milk is 0.86% and is 0.14% higher than that of cow milk. The goat milk contains higher elements than cow milk, mainly calcium, phosphorus, potassium, magnesium, chlorine, manganese and the like, and is a high-quality protein source in life.
The regenerated cellulose fiber is a degradable material taking natural cellulose (cotton, hemp, bamboo, trees and shrubs) as a raw material, active hydroxyl of cellulose molecules and other molecules are subjected to graft copolymerization in different production links, the chemical structure of the regenerated cellulose fiber is not changed, and the physical structure of the natural cellulose is only changed, so that the regenerated cellulose fiber with better performance is manufactured. The application of goat milk in spinning in the existing market is still a new application, and the application is less, the preparation method is incomplete, and the product is relatively less. The goat milk protein fiber obtained by applying the goat milk to the textile product has the smoothness of silk and the warmth of wool, so that the application field of the goat milk can be enlarged, more choices are added for textile raw materials, more products are brought to consumers, and the development prospect is wide.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in the prior art, the fat residual quantity of the goat milk degreasing is high, the degreasing effect is poor, and the invention provides the goat milk degreasing method suitable for goat milk protein fibers, which solves the problems.
The invention is realized by the following technical scheme:
a sheep milk degreasing method suitable for sheep milk protein fibers is further optimized, and comprises the following steps:
step 1: adding a nonionic surfactant into goat milk, stirring, standing to remove an upper layer substance to obtain a solution A;
step 2: adding ethanol into the solution A obtained in the step 1, wherein the mass ratio of the added ethanol to the solution A is 5-60%, preserving the heat, and removing the upper layer substances to obtain a solution B;
and step 3: and (3) heating the solution B in the step (2) to boil, pumping to remove the upper layer substance, filtering and drying to obtain the goat milk protein.
By preferably selecting a goat milk degreasing method, the nonionic surfactant is added in the step 1, and the nonionic surfactant contains oleophilic groups and can be combined with fat in the goat milk, so that the goat milk degreasing effect is realized; adding ethanol in the step 2, so that residual partial fatty oil and the like can be separated, and further degreasing treatment is carried out, thereby ensuring the purity of the goat milk protein; in the step 3, the solution is heated to a boiling state, so that substances with light density, such as fat, can float on the surface of the solution, namely the upper-layer substances are residual substances, such as fatty oil and fat; by the sheep milk degreasing method for preferably selecting the sheep milk protein fibers, fat in the sheep milk is effectively removed, so that the fat content is reduced, the residual fat content is effectively controlled, hidden dangers brought to equipment in the subsequent step production are avoided, and the influence on the product quality is reduced.
Further preferably, the mass ratio of the nonionic surfactant added in the step 1 to the goat milk is 2-10%.
More preferably, the nonionic surfactant added in step 1 is one or more of dodecyl diethanolamide, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and dodecyl alkanolamide phosphate.
Further preferably, the nonionic surfactant added in the step 1 is polyoxyethylene fatty alcohol ether and lauryl alkyl amide phosphate ester, and the mass ratio of the mixed mass of the added polyoxyethylene fatty alcohol ether and lauryl alkyl amide phosphate ester to the goat milk is 2-10%.
Further preferably, the nonionic surfactant added in the step 1 is polyoxyethylene fatty alcohol ether and lauryl alkyl amide phosphate, and the mass ratio of the mixed mass of the polyoxyethylene fatty alcohol ether and the lauryl alkyl amide phosphate to the goat milk is 4%.
Preferably, the added dodecyl diethanolamide, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and dodecyl alkanolamide phosphate ester substances have hydrophobic groups such as alkyl, fatty alcohol group, alkylphenol group and the like, and the addition amount of the substances is controlled, so that fat contained in the goat milk can be effectively wrapped, the whole molecule is separated from the aqueous solution due to the repulsive force of water, and is enriched on the surface of the solution, namely the upper layer substance is the fat-based hydrophobic substance separated from the goat milk.
Further preferably, a stirrer is adopted for stirring in the step 1, the rotating speed of the stirrer is set to be 300r/min-600r/min, and the stirring time is 0.5h-2 h. By controlling the stirring speed and time in the step 1 of the degreasing method, substances such as polyoxyethylene fatty alcohol ether and the like can be fully fused with the goat milk, the hydrophobic group can fully wrap the combined fat, and the residual quantity of the fat is reduced.
Further preferably, the concentration of the ethanol added in the step 2 is 20-80%. By controlling the quality and concentration of the added ethanol, the ethanol is fully fused with the mixed solution, so that the removal treatment of fatty oil and the like is achieved, and the residual fat in the step 1 is effectively removed.
Further preferably, the heat preservation time of the solution in the step 2 is set to be 0.5h-1.0h, and the heat preservation temperature is set to be 30-70 ℃.
Further preferably, in the step 3, the lower-layer substances are filtered by a centrifuge, the rotating speed of the centrifuge is set to be 1500-4000 r/min, and the centrifugation time is 5-15 min. Through controlling centrifugation speed and time in step 3, realize effectively getting rid of the fat in the goat milk, carry out centrifugal treatment once more to the remaining fat of earlier stage step, avoid remaining of fat, avoid influencing the hidden danger that causes equipment in the later stage production process, improve the quality of product.
The invention has the following advantages and beneficial effects:
1. the invention provides a goat milk degreasing method suitable for goat milk protein fibers, which is further optimized and comprises the following steps: step 1: adding a nonionic surfactant into goat milk, stirring, standing to remove an upper layer substance to obtain a solution A; step 2: adding ethanol into the solution A obtained in the step 1, wherein the mass ratio of the added ethanol to the solution A is 5-60%, preserving the heat, and removing the upper layer substances to obtain a solution B; and step 3: heating the solution B in the step 2 to boil, removing upper-layer substances, filtering and drying to obtain goat milk protein; fat in the goat milk can be combined by adding the nonionic surfactant in the preferable step 1, so that the fat is removed; step 2, adding ethanol to separate residual partial fatty oil and the like, thereby ensuring the purity of the goat milk protein; heating to a boiling state in the step 3, so that substances with light density such as fat can float on the surface of the solution, namely the upper-layer substances are residual substances such as fat and oil; by adopting the optimized degreasing method, fat in the goat milk can be effectively removed, the fat content is reduced, the residual fat content is effectively controlled, the degreasing effect is improved, the hidden danger brought to equipment in the subsequent steps in production is avoided, and the influence on the product quality is reduced;
2. in the step 1 of the invention, the mass ratio of the added nonionic surfactant to the goat milk is 2-10%; the nonionic surfactant added in the step 1 is one or more of dodecyl diethanolamide, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and dodecyl alkanolamide phosphate; the nonionic surfactant added in the step 1 is polyoxyethylene fatty alcohol ether and lauryl alkyl amide phosphate ester, and the mass ratio of the mixed mass of the polyoxyethylene fatty alcohol ether and the lauryl alkyl amide phosphate ester to the goat milk is 2-10%; the nonionic surfactant added in the step 1 is polyoxyethylene fatty alcohol ether and lauryl alkyl amide phosphate ester, and the mass ratio of the mixed mass of the added polyoxyethylene fatty alcohol ether and lauryl alkyl amide phosphate ester to the goat milk is 4%; the added substances such as polyoxyethylene fatty alcohol ether and the like preferably have hydrophobic groups such as alkyl, fatty alcohol group, alkylphenol group and the like, so that fat contained in the goat milk can be wrapped, the whole molecule is separated from the aqueous solution due to the repulsive force of water and is enriched on the surface of the solution, namely the upper-layer substance is the fat-based hydrophobic substance separated from the goat milk, and the residual quantity of the fat is effectively reduced;
3. stirring by adopting a stirrer in the step 1, wherein the rotating speed of the stirrer is set to be 300r/min-600r/min, and the stirring time is 0.5h-2 h; the concentration of the ethanol added in the step 2 is 20-80%; the heat preservation time of the solution in the step 2 is set to be 0.5h-1.0h, and the heat preservation temperature is set to be 30-70 ℃; filtering the lower-layer substances in the step 3 by adopting a centrifugal machine, wherein the rotating speed of the centrifugal machine is set to be 1500-4000 r/min, and the centrifugation time is 5-15 min; controlling the stirring speed and time to ensure that the added substances such as polyoxyethylene fatty alcohol ether and the like can be fully fused with the goat milk, so that the hydrophobic group can fully wrap the combined fat; by controlling the quality and concentration of the added ethanol, the ethanol is fully fused with the mixed solution to achieve the removal treatment of fatty oil and the like; through control centrifugal speed and time, realize effectively getting rid of the fat in the goat milk, carry out centrifugal treatment once more to the remaining fat of earlier stage step, avoid remaining of fat, avoid influencing the hidden danger that causes equipment in the later stage production process, improve the quality of product.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
A sheep milk degreasing method suitable for sheep milk protein fibers is further optimized, and comprises the following steps:
step 1: weighing 100kg of fresh goat milk, adding polyoxyethylene fatty alcohol ether and lauryl alkyl alcohol amide phosphate ester, wherein the adding amount is 4% of the weight of the goat milk, selecting a magnetic stirrer with the rotation speed of 450r/min for stirring for 1h, standing, and removing an upper layer substance to obtain a solution A;
step 2: adding the solution A obtained in the step 1 into 60% ethanol, wherein the addition amount of the ethanol is 15% of the mass of the solution A, preserving the heat at the temperature of 50 ℃ for 0.5h, and removing upper-layer substances to obtain a solution B;
and step 3: and (3) heating the solution B in the step (2) to boil, extracting to remove the upper layer substance, centrifuging and filtering the lower layer substance in a centrifuge with the rotating speed of 3000r/min for 10min, and evaporating and drying by a spray dryer to obtain the goat milk protein powder.
Example 2
This example differs from example 1 in that the polyoxyethylene fatty alcohol ether and lauryl alkanolamide phosphate are not added in step 1 of the method for sheep milk protein fiber degreasing; the remaining process steps are the same as in example 1.
Example 3
This example differs from example 1 in that polyoxyethylene fatty alcohol ether and lauryl alkyl alcohol amide phosphate are added in step 1 of the method for defatting sheep milk with sheep milk protein fiber, the addition amount is 2% of the weight of sheep milk; the remaining process steps are the same as in example 1.
Example 4
This example differs from example 1 in that polyoxyethylene fatty alcohol ether and lauryl alkyl alcohol amide phosphate are added in step 1 of the method for defatting sheep milk with sheep milk protein fiber, the addition amount is 10% of the weight of the sheep milk; the remaining process steps are the same as in example 1.
Example 5
This example differs from example 1 in that polyoxyethylene fatty alcohol ether and lauryl alkyl alcohol amide phosphate are added in step 1 of the method for defatting sheep milk with sheep milk protein fiber, the addition amount is 1% of the weight of the sheep milk; the remaining process steps are the same as in example 1.
Example 6
This example differs from example 1 in that the amount of ethanol added in step 2 of the method for defatting sheep milk with sheep milk protein fibers is 5% of the mass of solution A; the remaining process steps are the same as in example 1.
Carrying out relevant quality detection on the goat milk protein powder prepared by the goat milk degreasing method of the goat milk protein fiber provided by the embodiment;
1. the detection method of the fat residual quantity comprises the following steps:
the fat content was determined according to the second method of determination of fat in food GB 5009.6-2016 by acid hydrolysis.
2. The method for detecting the protein content of the goat milk comprises the following steps:
the protein content was examined according to GB/T5009.5-2003 for the determination of proteins in food products.
TABLE 1 quality test indexes of goat milk protein powder
Residual fat (%) Sheep milk protein content (%)
Example 1 0.13 92
Example 2 29.0 62
Example 3 7.4 78
Example 4 0.06 95
Example 5 18.0 71
Example 6 9.6 80
As can be seen from the table 1, the fat residue in the goat milk protein powder prepared by the goat milk degreasing method suitable for the goat milk protein fiber provided by the invention is less than or equal to 8%, and the control cost is low, so that the requirements of effectively controlling the fat residue and ensuring the effect are met.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. A goat milk degreasing method suitable for goat milk protein fibers is characterized by comprising the following steps:
step 1: adding a nonionic surfactant into goat milk, stirring, standing to remove an upper layer substance to obtain a solution A;
step 2: adding ethanol into the solution A obtained in the step 1, wherein the mass ratio of the added ethanol to the solution A is 5-60%, preserving the heat, and removing the upper layer substances to obtain a solution B;
and step 3: and (3) heating the solution B in the step (2) to boil, pumping to remove the upper layer substance, filtering and drying to obtain the goat milk protein.
2. The method for defatting sheep milk suitable for sheep milk protein fiber as claimed in claim 1, wherein the mass ratio of the nonionic surfactant added in step 1 to the sheep milk is 2% -10%.
3. The method for defatting sheep milk suitable for sheep milk protein fiber as claimed in claim 1, wherein the nonionic surfactant added in step 1 is one or more of dodecyl diethanolamide, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and dodecyl alkanolamide phosphate.
4. The method for degreasing goat milk suitable for goat milk protein fibers as claimed in claim 1, wherein the nonionic surfactant added in step 1 is polyoxyethylene fatty alcohol ether and lauryl alkyl alcohol amide phosphate, and the mass ratio of the added polyoxyethylene fatty alcohol ether and lauryl alkyl alcohol amide phosphate to the goat milk is 2% -10%.
5. The method for degreasing goat milk suitable for goat milk protein fibers as claimed in claim 4, wherein the nonionic surfactant added in step 1 is polyoxyethylene fatty alcohol ether and lauryl alkyl alcohol amide phosphate, and the mass ratio of the mixture of the polyoxyethylene fatty alcohol ether and the lauryl alkyl alcohol amide phosphate to the goat milk is 4%.
6. The method for degreasing sheep milk suitable for sheep milk protein fibers as claimed in claim 1, wherein a stirrer is adopted for stirring in step 1, the rotating speed of the stirrer is set to be 300r/min-600r/min, and the stirring time is 0.5h-2 h.
7. The method for defatting sheep milk suitable for sheep milk protein fiber as claimed in claim 1, wherein the concentration of ethanol added in step 2 is 20% -80%.
8. The method for degreasing sheep milk suitable for sheep milk protein fibers as claimed in claim 1, wherein the incubation time of the solution in the step 2 is set to 0.5h-1.0h, and the incubation temperature is set to 30 ℃ -70 ℃.
9. The method for defatting sheep milk suitable for sheep milk protein fiber as claimed in claim 1, wherein in step 3, the lower layer material is filtered by a centrifuge, the rotation speed of the centrifuge is set to 1500r/min-4000r/min, and the centrifugation time is 5min-15 min.
CN202011620004.1A 2020-12-30 2020-12-30 Goat milk degreasing method suitable for goat milk protein fibers Pending CN112825917A (en)

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US5780411A (en) * 1995-04-03 1998-07-14 Colgate-Palmolive Company High foaming nonionic surfactant based liquid detergent
CN1592580A (en) * 2001-11-23 2005-03-09 雀巢产品有限公司 Process for the preparation of concentrated milks and milk powders
CN102318684A (en) * 2011-08-11 2012-01-18 安徽达诺乳业有限公司 Cheese powder and its preparation method
CN106702406A (en) * 2016-04-18 2017-05-24 佛山瑞箭体育器材有限公司 Non-phosphorus degreasing agent and preparing method thereof
CN108935704A (en) * 2018-07-16 2018-12-07 陕西科技大学 A kind of probiotics goat milk powder and preparation method thereof
CN110663773A (en) * 2019-01-08 2020-01-10 东北农业大学 Method for separating natural whey protein from fresh milk and application
CN111961164A (en) * 2020-09-18 2020-11-20 宜宾惠美纤维新材料股份有限公司 Cashmere protein and preparation method of cashmere protein fiber

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Publication number Priority date Publication date Assignee Title
US5780411A (en) * 1995-04-03 1998-07-14 Colgate-Palmolive Company High foaming nonionic surfactant based liquid detergent
CN1592580A (en) * 2001-11-23 2005-03-09 雀巢产品有限公司 Process for the preparation of concentrated milks and milk powders
CN102318684A (en) * 2011-08-11 2012-01-18 安徽达诺乳业有限公司 Cheese powder and its preparation method
CN106702406A (en) * 2016-04-18 2017-05-24 佛山瑞箭体育器材有限公司 Non-phosphorus degreasing agent and preparing method thereof
CN108935704A (en) * 2018-07-16 2018-12-07 陕西科技大学 A kind of probiotics goat milk powder and preparation method thereof
CN110663773A (en) * 2019-01-08 2020-01-10 东北农业大学 Method for separating natural whey protein from fresh milk and application
CN111961164A (en) * 2020-09-18 2020-11-20 宜宾惠美纤维新材料股份有限公司 Cashmere protein and preparation method of cashmere protein fiber

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Application publication date: 20210525