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Method for preparing feather protein by alkali hydrolysis of animal hairs

A technology of hair alkali method and feather protein, which is applied in the chemical industry and can solve problems such as low yield and waste liquid discharge

Inactive Publication Date: 2013-06-12
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of amino acids is mainly carried out by hydrolysis with strong acids such as sulfuric acid or hydrochloric acid, but the yield is low and a certain amount of waste liquid will be discharged.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] 1. (1) Feather pretreatment: the waste feathers purchased are rinsed with water and then dried in the sun. The dried feathers are reduced to 0.5-1 cm. (2) Take 100 grams of waste feathers, 10 grams of barium hydroxide, and 100 grams of water respectively according to the ratio of 100:10:100, and add them to a small reactor (1 liter). Under the condition of min, react for 2 hours. (3) Then cool down to 50 degrees, add 10 grams of ammonium bicarbonate, react for about 1 hour, and filter to remove the precipitate. (4) Then put it in a beaker for evaporation and crystallization, and finally dry it in a vacuum oven to obtain high-purity feather protein.

Embodiment 2

[0010] 2. (1) Feather pretreatment: the waste feathers to be purchased are rinsed with water and then dried in the sun. The dried feathers are reduced to 0.5-1 cm. (2) According to the ratio of 100:50:100, take 100 grams of waste feathers after treatment, 50 grams of barium hydroxide, and 100 grams of water, and add them to a small reactor (1 liter). Under the condition of min, react for 2 hours. (3) Then cool down to 50 degrees, add 10 grams of ammonium bicarbonate, react for about 1 hour, and filter to remove the precipitate. (4) Then put it in a beaker for evaporation and crystallization, and finally dry it in a vacuum oven to obtain high-purity feather protein.

Embodiment 3

[0012] 3. (1) Feather pretreatment: the waste feathers purchased are rinsed with water and then dried in the sun. The dried feathers are reduced to 0.5-1 cm. (2) According to the ratio of 100:20:200, take 100 grams of waste feathers after treatment, 20 grams of barium hydroxide, and 200 grams of water, and add them to a small reactor (1 liter). Under the condition of min, react for 2 hours. (3) Then cool down to 50 degrees, add 10 grams of ammonium bicarbonate, react for about 1 hour, and filter to remove the precipitate. (4) Then put it in a beaker for evaporation and crystallization, and finally dry it in a vacuum oven to obtain high-purity feather protein.

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PUM

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Abstract

The invention belongs to the chemical field, and relates to a novel method for preparing feather protein by alkali hydrolysis of animal hairs. A strong alkali substance is used to decompose keratin which can be hydrolyzed into various free amino acids. Waste feathers, alkali and water are used for reaction according to a mass ratio of 100 : 10-300 : 100-500, wherein the waste feathers refer to waste chicken feathers, drake feathers, goose feathers and hairs of various birds and animals; the alkali refers to the barium hydroxide, calcium hydroxide, zinc hydroxide and the like. The hydrolysis is carried out for 0.5-5 hours at a temperature of 80-180 DEG C; then the temperature is reduced to below 500 DEG C; ammonium arbonate, ammonium bicarbonate and the like are added; precipitate is removed by filtration; and a mother solution is concentrated to obtain the feather protein with high purity.

Description

Technical field [0001] The invention belongs to the field of chemical industry, and relates to a new method for preparing feather protein by hydrolyzing animal hair with alkali method. Background technique [0002] Amino acids have a wide range of uses, and can be used in food, feed, industry, agriculture, cosmetics, etc., to make various products. By the 1980s, the nitrogenous acid industry in the world had been relatively developed, but in my country, except for glutamic acid, the nitrogenous acid industry was still a new industry. With the development of the national economy, it is very necessary to use chemical methods to develop amino acid and its chain products. The amino acid produced by this method is extracted from waste keratin. Keratin refers to hard proteins such as animal hair, feathers, hooves, and horns. The building blocks of keratin are still various natural amino acids. These natural keratins are insoluble proteins with a special structure, fibrous shap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K14/465C07K1/12
Inventor 韩冰刘志杰惠志涛冯志明
Owner NANJING INST OF TECH
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