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A method for preparing gelatin from poultry skin and its preparation method

A technology for poultry and gelatin, applied in the field of agricultural product processing, can solve the problems of poor gelatin decolorization effect, cumbersome preparation steps, low yield and the like, and achieves the effects of good application prospect, less energy consumption and high yield

Active Publication Date: 2017-09-29
广州纽缤乐营养科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • A method for preparing gelatin from poultry skin and its preparation method

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Comparison scheme
Effect test

Embodiment 1

[0027] A kind of method using poultry skin as raw material to prepare gelatin, concrete steps are as follows:

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

[0029] 2) One-time ultrasonic acidification: use acetone as solvent, cover the pretreated chicken skin, add phosphoric acid with a concentration of 10%, adjust the pH to 3-4, the ultrasonic oscillation frequency is 20kHz, and the oscillation time is 2h;

[0030] 3) Alkali washing: add triethylamine to the solution obtained in step 2) to make the pH 10, and soak for 5 hours;

[0031] 4) Secondary ultrasonic acidification: the solution in step 3) is concentrated under reduced pressure and washed with water, adding ethanol twice the weight of chicken skin, adding hydrochloric acid with a concentration of 20%, adjusting the pH to 6-7, and the ultrasonic oscillation frequency to 15kHz. The shaking time is 2h;

...

Embodiment 2

[0035] A kind of method using poultry skin as raw material to prepare gelatin, concrete steps are as follows:

[0036] 1) Poultry skin pretreatment: clean the duck skin, depilate, cut into 4×4mm small pieces, soak in 9% salt water for 4 hours, and wash with water;

[0037] 2) One-time ultrasonic acidification: use acetone as solvent, submerge the pretreated duck skin, add phosphoric acid with a concentration of 20%, adjust the pH to 3-4, the ultrasonic oscillation frequency is 25kH, and the oscillation time is 3h;

[0038] 3) Alkali washing: add pyridine to the solution obtained in step 2) to make the pH 11, and soak for 5 hours;

[0039] 4) secondary ultrasonic acidification: the solution in step 3) is concentrated under reduced pressure and then washed with water, adding propanol with 2 times the weight of duck skin, adding hydrochloric acid with a concentration of 20%, adjusting the pH to 6-7, and the ultrasonic oscillation frequency is 15kHz, the oscillation time is 3h; ...

Embodiment 3

[0043] A kind of method using poultry skin as raw material to prepare gelatin, concrete steps are as follows:

[0044] 1) Poultry skin pretreatment: clean the chicken skin, depilate, cut into 5×5mm small pieces, soak in 10% salt water for 5 hours, and wash with water;

[0045]2) One-time ultrasonic acidification: use acetone as solvent, cover the pretreated chicken skin, add phosphoric acid with a concentration of 30%, adjust the pH to 3-4, the ultrasonic oscillation frequency is 20kHz, and the oscillation time is 5h;

[0046] 3) Alkali washing: add KOH to the solution obtained in step 2) to make the pH 12, and soak for 5 hours;

[0047] 4) secondary ultrasonic acidification: the solution in step 3) is concentrated under reduced pressure and washed with water, adding ethylene glycol with a weight twice that of chicken skin, adding hydrochloric acid with a concentration of 20%, adjusting the pH to 6-7, and the ultrasonic oscillation frequency is 15kHz, the oscillation time is ...

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Abstract

The invention discloses a method for preparing gelatin by adopting poultry skin as a raw material. The method comprises: respectively performing one-time acid pickling, one-time alkaline wash and ultrasonic acid pickling for waste and useless poultry skin which is used as a raw material to be neutral, heating and decocting for a certain time to obtain a gelatin solution, and centrifuging and drying to obtain a product gelatin. The preparation method is simple and feasible; by virtue of the ultrasonic acid pickling twice, the fibers can be effectively loosened and can be decolored, and the decoloring step is not needed; and compared with the traditional gelatin production method, the method is short in production period, less in energy consumption, high in yield and good in 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 poultry skin. Background technique [0002] Gelatin is a degradation product of collagen and one of the natural biopolymer materials. It is widely used in food, medicine, daily chemical, photography and other fields. In 2012, the output of edible and medicinal gelatin in the international market reached 320,000 tons. Traditional gelatin production mainly uses the skin and bones of livestock such as cattle and pigs as raw materials. In recent years, due to the impact of zoonotic diseases such as mad cow disease and foot-and-mouth disease, many countries restrict or prohibit the production, import or use of gelatin from cattle and pigs. ; On the other hand, due to religious beliefs, some Jewish and Islamic regions do not accept pig-derived gelatin products. In recent years, gelatin has been developed from aquatic product processing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09H1/04C09H9/00C09H3/02
CPCC09H1/04C09H3/02C09H9/00
Inventor 不公告发明人
Owner 广州纽缤乐营养科技股份有限公司
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