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Bio-based leather filler and preparation method thereof

A bio-based, leather technology, applied in small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, waste treatment, etc. The problems of poor ecological sustainability of raw materials, cumbersome preparation process, etc., can achieve the effects of improving permeability and binding ability, good retanning and filling effect, and simple preparation method.

Active Publication Date: 2021-10-08
CHINA LEATHER & FOOTWEAR IND RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of bio-based leather filler, to overcome the cumbersome preparation process, poor ecological sustainability of raw materials used, and comprehensive filling when using chrome-free tanning waste leather scraps as raw materials to prepare leather fillers. Disadvantages such as unsatisfactory performance

Method used

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  • Bio-based leather filler and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] A method for preparing a bio-based leather filler, comprising: using chrome-free tanned waste leather scraps as raw materials, fully mixing it with water, raising the temperature to 60-90 ºC, and then adding a catalyst, an acid and an oxidizing agent to perform a degradation reaction for 0.5- 2 h.

[0034] Wherein, in parts by weight, the chrome-free tanned waste leather scraps are 100 parts, the water is 200-1000 parts, the catalyst is 0.05-0.2 parts, the acid is 0-20 parts, and the oxidizing agent is 20-100 parts.

[0035] The chrome-free tanned waste leather shavings are at least one of chrome-free metal tanning agent tanned waste leather shavings, organic tanned waste leather shavings, and combined tanned waste leather shavings. Preferably, the waste leather shavings tanned by the non-chromium metal tanning agent are at least one of waste leather shavings tanned by zirconium tanning agents, waste leather shavings tanned by aluminum and zirconium; At least one of ve...

Embodiment 2

[0045] A preparation of bio-based leather filler:

[0046] Take 100 parts of zirconium tanned waste leather shavings, add 200 parts of water, mix well, raise the temperature to 90 ºC, add 0.04 parts of ferrous sulfate, 0.01 parts of copper sulfate, 5 parts of sulfuric acid, 50 parts of hydrogen peroxide, and react for 1 h to obtain the first a mixed solution;

[0047] Add 2 parts of formylated carboxymethyl cellulose to the first mixed solution under stirring, after fully mixing, control the temperature to 50 ºC, adjust the pH of the reaction system to 7.0, and react for 2 h to obtain the second mixed solution; and

[0048] Add 2 parts of sodium bisulfite to the second mixed solution, continue the reaction for 0.5 h, and obtain the bio-based leather filler after drying.

Embodiment 3

[0050] A preparation of bio-based leather filler:

[0051] Take 100 parts of alginated sodium alginate tanned waste leather shavings, add 400 parts of water, mix thoroughly, heat up to 60 ºC, add 0.2 parts of sodium tungstate, 10 parts of hydrochloric acid, 100 parts of hydrogen peroxide, and react for 2 hours to obtain the first a mixed solution;

[0052] Control the temperature to 50-80 ºC, adjust the pH of the reaction system to 8.0, and react for 4 h to obtain the second mixed solution; and

[0053] Add 4 parts of sodium sulfite to the second mixed solution, continue to react for 1 h, and obtain bio-based leather filler after drying.

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Abstract

The invention belongs to the technical field of leather solid waste resource utilization, and particularly discloses a bio-based leather filler and a preparation method thereof. The preparation method comprises the steps that chrome-free tanning waste leather scraps serve as raw materials and are fully mixed with water to be uniform, then the temperature is increased to 60-90 DEG C, and then a catalyst, acid and an oxidizing agent are added for a degradation reaction for 0.5-2 h. By adopting the catalytic oxidation method, the tanned waste leather scraps can be quickly degraded, the efficiency is high, and the treatment period of the tanned waste leather scraps is greatly shortened. According to the bio-based leather filler provided by the invention, the modifier used during preparation is bio-based aldehyde, and the raw materials for preparation are wide in source and renewable, so that the bio-based leather filler provided by the invention has good environmental and social benefits.

Description

technical field [0001] The invention relates to the technical field of resource utilization of leather solid waste, in particular to a bio-based leather filler and a preparation method thereof. Background technique [0002] With the traditional tanning process, only about 70% of the raw hide weight will be converted into finished leather, and the remaining about 30% will be converted into leather solid waste. According to statistics, more than 600,000 tanning solid wastes are produced every year in the world, and the main component of these leather wastes is collagen, but they are not well utilized. Most of them are disposed of by incineration or landfill, which not only causes It wastes resources and seriously pollutes the environment. Currently, restricted by relevant national laws and regulations, the chrome tanning method is facing severe challenges. In this context, the chrome-free tanning technology will be developed rapidly, and at the same time, a large amount of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/08B09B3/00
CPCC14C3/08B09B3/00Y02W30/20
Inventor 丁伟刘海腾庞晓燕丁志文
Owner CHINA LEATHER & FOOTWEAR IND RES INST
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