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Method for preparing modified collagen polypeptide leather making filler from chrome-free polymetal tanning leather meal

A collagen peptide, multi-metal technology, applied in leather impregnation, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. Molecular weight, saving tanning cost, high hydrolysis rate

Active Publication Date: 2019-06-07
宏兴汽车皮革(福建)发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, in view of the above-mentioned problems, the present invention proposes a method for preparing a modified collagen polypeptide tanning filler from chrome-free multi-metal tanned leather shavings. The method of tannery can reduce the environmental pollution of tanning, solve the problem of difficult leather shavings processing in enterprises, and can also save resources, save tanning costs, and improve the economic benefits of enterprises; the modified collagen polypeptide tannery prepared by the method The filler has a moderate molecular weight, high hydrolysis yield, positive electricity, antibacterial and antifungal properties, and can avoid leather discoloration when used in the tanning process. It can also promote the absorption of other anionic materials in the tanning process and endow the leather with mildew resistance.

Method used

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  • Method for preparing modified collagen polypeptide leather making filler from chrome-free polymetal tanning leather meal

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A method for preparing a modified collagen polypeptide tanning filler from chromium-free multi-metal tanned leather shavings, comprising the steps in turn:

[0021] Step (1) Hydrolysis of leather shavings: take a certain amount of leather shavings and place them in a reactor, based on the quality of leather shavings, add 1% surfactant, 0.5% degreasing agent, 10 times of water, soak and stir the leather shavings for 2 hours, Drain the water, then wash with water twice; add 15% oxalic acid, 7.5 times water, stir and react at 90°C for 8 hours, filter and dry to obtain collagen polypeptide;

[0022] Step (2) Collagen polypeptide modification: Take a certain amount of collagen polypeptide and add it to the reactor. Based on the quality of the collagen polypeptide, add 3 times of water to dissolve it, add 100% absolute ethanol while stirring, add 20% triethylamine, add 40% tetrakis hydroxymethyl quaternary phosphonium salt, adjust the pH to 7, stir and react at 30°C for 6 hou...

Embodiment 2

[0024] A method for preparing a modified collagen polypeptide tanning filler from chromium-free multi-metal tanned leather shavings, comprising the steps in turn:

[0025] Step (1) leather shavings hydrolysis: take a certain amount of leather shavings and place them in a reactor, based on the quality of leather shavings, add 2% surfactant, 0.2% degreasing agent, 15 times of water, soak and stir the leather shavings for 5 hours, Drain the water, then wash with water twice; add 20% oxalic acid, 10 times of water, stir and react at 80°C for 5 hours, adjust the temperature, stir and react at 60°C for 5 hours, filter and dry to obtain collagen polypeptide;

[0026] Step (2) Collagen polypeptide modification: Take a certain amount of collagen polypeptide and add it to the reactor. Based on the quality of the collagen polypeptide, add 5 times of water to dissolve it; take 100% vinyl-containing quaternary ammonium salt in the container, add vinyl-containing quaternary ammonium salt 10...

Embodiment 3

[0028] A method for preparing a modified collagen polypeptide tanning filler from chromium-free multi-metal tanned leather shavings, comprising the steps in turn:

[0029] Step (1) Hydrolysis of leather shavings: take a certain amount of leather shavings and place them in a reactor, based on the quality of leather shavings, add 0.5% surfactant, 1% degreasing agent, 8 times the water, soak and stir the leather shavings for 1 hour, Drain the water, then wash with water twice; add 10% oxalic acid, 15 times water, stir at 70°C for 4 hours, 50°C for 6 hours, and 30°C for 8 hours, filter and dry to obtain collagen polypeptide;

[0030] Step (2) Collagen polypeptide modification: Take a certain amount of collagen polypeptide and add it to the reactor. Based on the quality of the collagen polypeptide, add 5 times the water to dissolve it; take 50% of the vinyl-containing quaternary ammonium salt in the container, and add the vinyl-containing quaternary ammonium salt. 100% water of qua...

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Abstract

The invention relates to the technical field of leather making chemistry and engineering and provides a method for preparing a modified collagen polypeptide leather making filler from chrome-free polymetal tanning leather meal. According to the method for preparing the modified collagen polypeptide leather making filler from the chrome-free polymetal tanning leather meal, the pollution to environments caused by leather making can be reduced, the problem that leather meal of enterprises is difficult in treatment is solved, meanwhile, resources can be saved, the leather making cost is reduced, and meanwhile, the economic benefit of the enterprises is improved; the modified collagen polypeptide leather making filler prepared by the method is moderate in molecular weight and high in hydrolysisyield and has electropositivity and antibacterial and mildewproof properties; and when the modified collagen polypeptide leather making filler is applied to leather making procedures, an off shade phenomenon of leather can be avoided, the absorption of other anionic materials in the leather making procedures can be promoted, and the leather is endowed with mildew resistance.

Description

technical field [0001] The invention relates to the technical field of tanning chemistry and engineering, in particular to a method for preparing a modified collagen polypeptide tanning filler from chrome-free multi-metal tanned leather scraps. Background technique [0002] Disposal of tanning shavings is one of the major difficulties faced by tanning enterprises. According to the traditional tanning process, nearly 30% of the raw hide quality in the tanning process will be transformed into leather solid waste such as leather shavings, including chromium-containing solids Waste and chrome-free solid waste, about 600,000 leather wastes are generated every year in the world. These leather wastes are rich in collagen, but they are not well utilized, and most of them are disposed of by incineration and landfill, which wastes resources and pollutes the environment. The preparation of leather shavings into tanning fillers, which are obtained from leather and used in leather, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/08C14C9/02
Inventor 孙辉永梁永贤姚庆达杨义清温会涛但卫华
Owner 宏兴汽车皮革(福建)发展有限公司
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