Ultrasonic emulsifying degreasing method for animal skin

A phacoemulsification, animal skin technology, applied in leather degreasing, small raw hide/large raw hide/leather hide/fur chemical treatment, small raw hide/large raw hide/leather/fur treatment, etc., can solve the loss of collagen and low degreasing rate , troublesome operation and other problems, to achieve the effect of small loss of collagen, high degreasing rate and easy operation

Inactive Publication Date: 2013-07-24
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkaline degreasing method is low in cost, but it can only remove the fat on the surface, it is difficult to remove the lipids inside the animal skin, and it will cause a large loss of collagen; the organic solvent degreasing method is based on the principle of similar compatibility, using organic Solvents dissolve the lipids in the skin, commonly used are ethanol, isopropanol, acetone, petroleum ether, etc., but this method has problems such as expensive organic solvents, poisonous, flammable, high equipment investment, troublesome operation, and environmental pollution. ; Enzymatic degreasing has the characteristics of mild conditions, easy control, safety and specificity, but this method also has problems such as high cost and troublesome operation
In conclusion, the degreasing methods currently used have defects such as low degreasing rate, long processing time, high cost, cumbersome operation, environmental pollution, collagen loss or denaturation, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this example, 10g of pig skin is taken (the collagen content in pig skin is 1.924g), and then processed by the method of efficient degreasing of animal skin, which specifically includes the following steps:

[0023] a. Pretreatment: Remove the pig hair on the surface of the pigskin, and wash it three times with water to wash away visible impurities, and then scrape off the surface fat; then cut the pigskin into small pieces of 4mm×4mm to pretreat the pigskin;

[0024] b. Ultrasonic degreasing: Add 0.75% sodium dodecylbenzene sulfonate (SDBS) emulsion to the pretreated pig skin obtained in step a at a ratio of 1:2 (g / mL), and then at a temperature of Ultrasonic emulsification and defatting for 2 hours at 25°C and a power of 120W to obtain crude defatted pig skin;

[0025] c. Post-treatment: the crude defatted pig skin obtained in step b is rinsed 3 times with pure water at a temperature of 29°C, filtered, and then treated at a temperature of 102°C for 3 hours and dried to a ...

Embodiment 2

[0041] In this example, 10g of pig skin is taken (the collagen content in pig skin is 1.924g), and then processed by the method of efficient degreasing of animal skin, which specifically includes the following steps:

[0042] a. Pretreatment: Remove the pig hair on the surface of the pigskin, and wash it three times with water to wash away visible impurities, and then scrape off the surface fat; then cut the pigskin into small pieces of 4mm×4mm to pretreat the pigskin;

[0043] b. Ultrasonic degreasing: Add 1% mass fraction of sodium dodecylbenzene sulfonate (SDBS) emulsion to the pretreated pigskin obtained in step a at a ratio of 1:2.5 (g / mL), and then at a temperature of Ultrasonic emulsification and defatting for 2 hours at 25°C and a power of 120W to obtain crude defatted pig skin;

[0044] c. Post-treatment: the crude defatted pig skin obtained in step b is rinsed 3 times with pure water at a temperature of 31°C, filtered, and then treated at a temperature of 104°C for 3 hours,...

Embodiment 3

[0048] In this example, 10g of pig skin is taken (the collagen content in pig skin is 1.924g), and then processed by the method of efficient degreasing of animal skin, which specifically includes the following steps:

[0049] a. Pretreatment: Remove the pig hair on the surface of the pigskin, and wash it three times with water to wash away visible impurities, and then scrape off the surface fat; then cut the pigskin into small pieces of 4mm×4mm to pretreat the pigskin;

[0050] b. Ultrasonic degreasing: Add 0.75% sodium dodecylbenzene sulfonate (SDBS) emulsion to the pretreated pig skin obtained in step a at a ratio of 1:2.5 (g / mL), and then at a temperature of Ultrasonic emulsification and defatting for 2 hours at 25°C and a power of 120W to obtain crude defatted pig skin;

[0051] c. Post-treatment: the crude defatted pig skin obtained in step b is rinsed with pure water at 30°C for 3 times, filtered, and then treated at 103°C for 3 hours, and dried to constant weight to obtain def...

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Abstract

The invention discloses an ultrasonic emulsifying degreasing method for an animal skin. The ultrasonic emulsifying degreasing method comprises the steps of: removing impurities on the surface of an animal skin and washing the animal skin through clean water, and cutting the animal skin for later use; adding a surfactant to the animal skin, implementing ultrasonic emulsifying degreasing, rinsing the animal skin by pure water at 29-31 DEG C after the ultrasonic treatment, filtering, and drying to constant weight at 102-104 DEG C to obtain the degreased animal skin. The method disclosed by the invention, in treating a mammal skin or a fishskin, can achieve degreasing rates greater than 68% and 80% respectively, and is low in collagen loss rate, wherein the collagen loss rate of the mammal skin is lower than 10% and the collagen loss rate of the fishskin is lower than 6%; and the degreased animal skin has a high collagen content, and after being further processed, can be widely applied to food, cosmetics, medicine and other fields.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of animal product resources and relates to a ultrasonic emulsification and degreasing method for animal hides. Background technique [0002] my country is rich in edible animal resources, but the current utilization of edible animal resources is mostly limited to meat, and a large number of animal skin resources have not been fully utilized. Animal skins are rich in protein resources, especially collagen. For example, the collagen content in pig skin is as high as 87.8%, and the collagen content in fish skin is also more than 80%. Therefore, animal skin is an ideal raw material for collagen, but both pig skin and fish skin contain a lot of fat. If it is not fully removed, it will have a negative impact on the extraction and further processing of collagen. If fat is mixed in the collagen, it cannot be removed by neutral or acidic extraction, and only an milky collagen solution can be obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C5/00
Inventor 张宇昊刘轶马良
Owner SOUTHWEST UNIV
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