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Preparation method of modified Chinese gall tanning extract environmentally-friendly leather tanning agent

A kind of technology of gallia chinensis and quincea quinquefolium, which is applied in the field of preparation of modified quincea gallis extract type green leather tanning agent, can solve problems such as environmental pollution, achieve wide application prospects, improve permeability, and unique process effects

Active Publication Date: 2011-04-06
南通安广美术图案设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is of positive significance to the current green production of leather and to solve the environmental pollution problems generated in the production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: Dissolve 20 grams of pentagon extract, 1.25 grams of sodium p-hydroxybenzenesulfonate and 2 carats of open powder (sodium butylnaphthalenesulfonate) in 72 grams of water, stir evenly and heat to 32 ° C, wherein The molar ratio of sodium p-hydroxybenzenesulfonate and pull open powder is 1: 1; adjust system pH to 7~8 with sodium bicarbonate, add the HRP (horseradish peroxidase (horseradish peroxidase, HRP) that concentration is 0.5 g / liter ) solution, 2.5 grams of hydrogen peroxide solution with a mass fraction of 30% was added dropwise, and the dropwise addition time was 2 hours. After the addition, the reaction was continued for 3.0 hours.

Embodiment 2

[0007] Example 2: Dissolve 21.2 grams of pentagon extract, 2.5 grams of sodium p-hydroxybenzenesulfonate and 40 grams of open powder (sodium butylnaphthalenesulfonate) in 82.5 grams of water, stir evenly and heat to 30 ° C, wherein The molar ratio of sodium p-hydroxybenzenesulfonate and pull open powder is 1: 1; adjust system pH to 7~8 with sodium bicarbonate, add the HRP (horseradish peroxidase (horseradish peroxidase, HRP) that concentration is 0.5 g / liter ) solution 5 milliliters, dropwise addition of 3.7 grams of hydrogen peroxide solution with a mass fraction of 30%, the addition time is 2 hours, after the addition is completed, continue the insulation reaction for 3.0 hours.

Embodiment 3

[0008] Example 3: Dissolve 21.5 grams of pentagon extract, 3.75 grams of sodium p-hydroxybenzenesulfonate and 6 carats of open powder (sodium butylnaphthalenesulfonate) in 98.2 grams of water, stir evenly and heat to 33 ° C, wherein The molar ratio of sodium p-hydroxybenzenesulfonate and pull open powder is 1: 1; adjust system pH to 7~8 with sodium bicarbonate, add the HRP (horseradish peroxidase (horseradish peroxidase, HRP) that concentration is 0.5 g / liter ) solution, 5 grams of hydrogen peroxide solution with a mass fraction of 30% was added dropwise, and the dropwise addition time was 1.5 hours. After the addition, the reaction was continued for 3.0 hours.

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Abstract

The invention relates to a preparation method of a modified Chinese gall tanning extract environmentally-friendly leather tanning agent. Graft modification is performed on a Chinese gall tanning extract with p-hydroxy benzenyl sulfonate sodium and nekal under the catalytic action of horseradish peroxidase / H2O2 so as to obtain the environmentally-friendly leather tanning agent. The nekal is introduced into the leather tanning agent, so that the dissolubility of the Chinese gall tanning extract and the penetrability of the Chinese gall tanning extract in a leather fiber can be improved remarkably; and the p-hydroxy benzenyl sulfonate sodium is introduced, so that the tanning effect of the Chinese gall tanning extract can be enhanced. When the modified Chinese gall tanning extract related bythe invention is applied to major tanning, the shrinkage temperature can be raised to be 70 and 75 DEG C and leather thickening effect is remarkable; when the Chinese gall tanning extract is applied to retanning, the Chinese gall tanning extract has high seepage velocity, the leather body of finished leather is full, has moderate elasticity and fine grain surface, and incision fibers have high dispersibility and light colors; and the product is beneficial to the realization of environmentally-friendly leather production and plays a positive role in reducing pollution caused by leather tanning.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly polymer leather tanning agent, in particular to a preparation method of a green leather tanning agent of a modified sclerophyll extract type. Background technique [0002] Leather tanning agent is a kind of chemical commonly used in leather industry production, including vegetable tannin, metal tannin, synthetic tanning agent and so on. In recent years, due to the environmental pollution caused by leather industry tanning wastewater, as a worker in the leather industry, it is very important to produce a green and environmentally friendly tanning agent. The catalyst HRP used in the preparation of the product of the present invention is a natural biological enzymatic polymerization catalyst with unique properties. It can specifically catalyze monomers such as phenols and anilines and carry out free radical polymerization reactions under mild reaction conditions. (Simona Sgalla, Gi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/12
Inventor 吕生华侯明明闫小亮段建平弓瑞高瑞军马艳芬
Owner 南通安广美术图案设计有限公司
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