Method for preparing gelatin by utilizing pigskin as raw material and preparation method

A technology for pigskin and gelatin, applied in the field of agricultural product processing, can solve the problems of poor gelatin decolorization effect, complicated preparation steps, poor gel properties, etc., achieves good application prospects, good gel properties, and improves the removal of residual oil and impurities. The effect of protein efficiency

Active Publication Date: 2016-05-04
威海银河生物技术股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods for preparing gelatin in the prior art all have the defects of poor gelatin decolorization effect, poor gel properties, cumbersome preparation steps, high energy consumption, and low yield.

Method used

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  • Method for preparing gelatin by utilizing pigskin as raw material and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing gelatin with pigskin as a raw material, the specific steps are as follows:

[0028] 1) Pigskin pretreatment: clean the pigskin, depilate, cut into small pieces of 3×3 mm, soak in 8% salt water for 2 hours, and wash with water;

[0029] 2) Pressurized acidification: use ethyl acetate as a solvent, submerge the pretreated pigskin, add phosphoric acid with a concentration of 10%, adjust the pH to 3-4, pressurize at 15 MPa, and pressurize for 2 hours;

[0030] 3) Pressurized alkali washing: the solution obtained in step 2) is concentrated under reduced pressure and washed with water, adding deionized water twice the weight of pigskin, and using triethylamine to adjust the solution obtained in step 2) so that its pH is 6 -7, pressurization pressure is 5MPa, pressurization time is 5h;

[0031] 4) Heating: Concentrate the solution obtained in step 4) under reduced pressure and rinse with water three times, add hydrogen peroxide 0.1 times the weight of p...

Embodiment 2

[0034] 1) Pigskin pretreatment: clean the pigskin, depilate, cut into 4×4mm small pieces, soak in 9% salt water for 4 hours, and wash with water;

[0035] 2) Pressurized acidification: use ethyl acetate as a solvent, submerge the pretreated pigskin, add phosphoric acid with a concentration of 10%, adjust the pH to 3-4, pressurize at 15 MPa, and pressurize for 2 hours;

[0036] 3) Pressurized alkali washing: the solution obtained in step 2) is concentrated under reduced pressure and washed with water, adding deionized water twice the weight of pigskin, and using triethylamine to adjust the solution obtained in step 2) so that its pH is 6 -7, pressurization pressure is 5MPa, pressurization time is 5h;

[0037] 4) Heating: Concentrate the solution obtained in step 4) under reduced pressure and rinse it with water three times, add hydrogen peroxide 0.2 times the weight of pigskin and deionized water 5 times the weight of pigskin, and heat at 40°C for 10 hours to obtain a gelatin ...

Embodiment 3

[0040] 1) Pigskin pretreatment: clean the pigskin, depilate, cut into small pieces of 5×5 mm, soak in 10% salt water for 5 hours, and wash with water;

[0041] 2) Pressurized acidification: use ethyl acetate as a solvent, submerge the pretreated pigskin, add phosphoric acid with a concentration of 10%, adjust the pH to 3-4, pressurize at 15 MPa, and pressurize for 2 hours;

[0042] 3) Pressurized alkali washing: the solution obtained in step 2) is concentrated under reduced pressure and washed with water, adding deionized water twice the weight of pigskin, and using triethylamine to adjust the solution obtained in step 2) so that its pH is 6 -7, pressurization pressure is 5MPa, pressurization time is 35h;

[0043] 4) Heating: Concentrate the solution obtained in step 4) under reduced pressure and rinse it with water three times, add hydrogen peroxide 0.15 times the weight of pigskin and deionized water 5 times the weight of pigskin, and heat at 40°C for 5 hours to obtain a ge...

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Abstract

The invention discloses a method for preparing gelatin by utilizing pigskin as a raw material. The method comprises the following steps of respectively performing acid pickling and alkali washing once on waste useless pigskin utilized as a raw material under a pressurization condition, heating and decocting for a certain time so as to obtain a gelatin solution, centrifuging and freeze-drying to obtain the gelatin product. The preparation method is simple and practical; through twice respectively-performed pressurized acid pickling and alkali washing, not only can fibers be effectively loosened, grease and impure protein are eliminated, decoloration is performed, and other purification steps are not required to be performed. Compared with a traditional gelatin production method, the method disclosed by the invention is high in yield, short in production period and low in energy consumption, and has favorable application prospect.

Description

technical field [0001] The invention relates to the field of agricultural product processing, in particular to a method for preparing gelatin from pigskin. Background technique [0002] Gelatin is a product obtained from collagen contained in animal skin, bone, and white connective tissue, which is purified and processed after primary hydrolysis. Gelatin is light yellow to yellow, translucent and slightly glossy powder or flakes, no special odor, no volatility. Generally, the water content of gelatin is less than 16%. Gelatin is relatively stable in a dry environment, and it is easy to absorb moisture and be decomposed by bacteria in a humid environment to deteriorate. When gelatin is burned, it softens and swells until it is charred, giving off a distinctive smell of burning feathers or ammonia. Gelatin is difficult to dissolve in cold water, but it can absorb water and become soft, and it is very easy to dissolve in hot water. Gelatin is insoluble in common organic solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09H1/04C09H3/00C09H9/00
CPCC09H1/04C09H3/00C09H9/00
Inventor 不公告发明人
Owner 威海银河生物技术股份有限公司
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