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Process of extracting collagen from waste chrome leather scraps

A technology of collagen and process method, which is applied in the field of collagen extraction process, can solve the problems of low yield, poor quality, low viscosity of gelatin, etc., and achieve the effect of improving extraction rate and realizing resource utilization

Inactive Publication Date: 2013-01-23
黄义
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AI Technical Summary

Problems solved by technology

Calcium oxide has a strong effect in the alkali treatment process. Although the extraction rate of collagen is high, the gelatin produced has low viscosity and poor quality; magnesium oxide treatment is gentle, and the viscosity of extracted protein is high, but the yield is not high.

Method used

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  • Process of extracting collagen from waste chrome leather scraps
  • Process of extracting collagen from waste chrome leather scraps
  • Process of extracting collagen from waste chrome leather scraps

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Experimental program
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Embodiment Construction

[0013] The process flow is chrome leather shavings→pretreatment→alkaline hydrolysis→centrifugation, and gelatin and filtrate are obtained after centrifugation; gelatin is desalted and dried, filtrate is hydrolyzed by enzymes→centrifugation, and amino acids, polypeptides and chromium cakes are obtained after centrifugation.

[0014] Chromium leather shavings contain a certain amount of impurities such as inorganic salts, so it is necessary to pretreat them with water. Washing can reduce the ash content, chromium content and free acid in the chrome leather shavings, help to reduce the ash content in the hydrolyzed protein product, and at the same time reduce the impact of these impurities on the later alkaline enzyme hydrolysis.

[0015] The washing pretreatment process is to wash twice with water, each time for 30 minutes, the water consumption is 300% (based on the dry basis of leather shavings), and the nonionic surfactant is 0.5%.

[0016] The main factors affecting the yiel...

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Abstract

A process of extracting collagen from waste chrome leather scraps belongs to the extraction technology of collagen. The invention provides the process of extracting collagen from waste chrome leather scraps. The technological process of the invention includes: pretreating the chrome leather scraps, alkaline hydrolyzing, centrifuging to get gelatin and filtrate, desalting and drying the gelatin, hydrolyzing the filtrate with enzyme, and centrifuging to get amino acids, polypeptides and a chrome cake.

Description

technical field [0001] The invention belongs to the extraction process of collagen. Background technique [0002] According to statistics, in the tanning process, 1 ton of raw hide can only produce 200kg of finished leather, accounting for only 20% of raw hide, but more than 60% of solid waste will be produced. Among the tanning wastes, the annual production of chrome tanning shavings in my country is estimated to be more than 300,000 tons; and in the dry basis of chrome tanning shavings, collagen accounts for about 90%, containing Cr 2 o 3 About 3%-6%. Due to the unique structure and outstanding properties of collagen, it can be used in the production of tanning agents, retanning agents, fatliquoring agents, finishing agents, etc. in the leather industry. In addition, collagen is also widely used in medicine, cosmetics industry, food industry, feed industry and aquaculture industry and so on. Recycling chrome-tanned leather shavings can not only eliminate the pollution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P21/06C12P13/00C07K1/14
Inventor 黄义
Owner 黄义
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