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Acid softening and degreasing compound enzyme preparation and application thereof to tanning process

A compound enzyme preparation, softening enzyme technology, applied in application, leather degreasing, small raw hide/large hide/leather/fur treatment, etc., can solve the problem of inconsistent degree of fiber dispersion, surface residue and uneven tanning of acid hide or wet blue hide. problems, to achieve the effect of reducing grain defects, reducing stiff edges, and making up for inconsistencies

Inactive Publication Date: 2016-12-07
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the deficiencies of the prior art and provides an acid softening and degreasing compound enzyme preparation and its application in tanning process, so as to solve the problem of inconsistency in fiber dispersion of acid leather or wet blue leather that can not be completely solved by single acid enzyme treatment at present. Technical problems such as unevenness, residual dirt on the surface, residual scale and fat in the skin

Method used

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  • Acid softening and degreasing compound enzyme preparation and application thereof to tanning process
  • Acid softening and degreasing compound enzyme preparation and application thereof to tanning process
  • Acid softening and degreasing compound enzyme preparation and application thereof to tanning process

Examples

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Embodiment 1

[0046] The optimum pH value is 3-3.5, the enzyme activity is 100,000 units / g AP-050 acid protease 0.8kg produced by Jiangsu Boli Biological Products Co., Ltd., and the enzyme activity is 50,000 units / g Yangshao Biochemical Engineering Co., Ltd. 0.1kg of Yssh-lipase produced, 0.15kg of glucoamylase ASP-G produced by Jiangsu Boli Biological Products Co., Ltd. with an enzyme activity of 50,000 units / g, 0.25kg of enzyme penetration enhancer, 1kg of calcium formate, dihydrogen phosphate 1 kg of sodium, 2 kg of ammonium sulfate, and 4.8 kg of anhydrous sodium sulfate were uniformly mixed to obtain the acid softening and degreasing compound enzyme preparation in this embodiment.

[0047] Put 100kg of goat’s sour skin into the drum, add 50kg of water, adjust the temperature to 35°C, add 5kg of NaCl, turn it on for 20 minutes, add 0.5kg of formic acid in portions until the pH is adjusted to about 3.0, turn it for 30 minutes; add 0.8kg The acid softening degreasing compound enzyme prepa...

Embodiment 2

[0055] The most suitable pH value is 3-3.5, the enzyme activity is 100,000 units / g, and the acid AP-050 protease produced by Jiangsu Boli Biological Products Co., Ltd. is 1.1kg, and the enzyme activity is 50,000 units / g Yangshao Biochemical Engineering Co., Ltd. 0.2kg of Yssh-lipase produced by the company, 0.15kg of glucoamylase ASP-G produced by Jiangsu Boli Biological Products Co., Ltd. with an enzyme activity of 50,000 units / g, 0.3kg of enzyme penetration enhancer JFC, 1kg of calcium chloride, and phosphoric acid 1 kg of sodium dihydrogen, 2 kg of ammonium sulfate, and 4.25 kg of kaolin were evenly mixed to prepare the acid softening and degreasing compound enzyme preparation in this embodiment.

[0056] Put 100kg of yellow cattle wet blue hide into the drum, add 100kg of water, and adjust the temperature to 35°C. Dilute 0.5kg of formic acid and add in portions until the pH is adjusted to about 3.0; add 1kg of acid softening and degreasing compound enzyme preparation to so...

Embodiment 3

[0067] The most suitable pH value is 3-3.5, the enzyme activity is 100,000 units / g, and the acid AP-050 protease produced by Jiangsu Boli Biological Products Co., Ltd. is 1.2kg, and the enzyme activity is 50,000 units / g Yangshao Biochemical Engineering Co., Ltd. 0.3kg of Yssh-lipase produced by the company, 0.2kg of glucoamylase ASP-G produced by Jiangsu Boli Biological Products Co., Ltd. with an enzyme activity of 50,000 units / g, 0.3kg of enzyme penetration enhancer T0.3kg, 1kg of calcium formate, diphosphate 1 kg of sodium hydrogen, 2 kg of ammonium sulfate, and 4.0 kg of rice bran were uniformly mixed to obtain the acid softening and degreasing compound enzyme preparation in this embodiment.

[0068] Put 100kg of pig wet blue skin into the drum, add 100kg of water, adjust the temperature to 35°C, dilute with 0.5kg of formic acid and add in portions until the pH is adjusted to about 3.0; add 1kg of acid softening and degreasing compound enzyme preparation to soften, transfer ...

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Abstract

The invention discloses an acid softening and degreasing compound enzyme preparation and an application thereof to a tanning softening process. The compound enzyme preparation is characterized by being prepared from 1-20 parts by weight of protease, 1-15 parts by weight of an enzyme permeation promoter, 1-30 parts by weight of a pH regulating agent, 1-10 parts by weight of an enzyme activator and 1-60 parts by weight of a diluent. The compound enzyme preparation has the relatively high acid resistance, has the optimal pH value ranging from 3 to 6 and is applicable to separate softening and degreasing of pickled skin and softening and degreasing of blue leather or re-tanned crust leather. The compound enzyme preparation can loosen leather fibers uniformly and mildly, reduce stiff edges, rigid wrinkles and fiber hardening of the pickled skin or the blue leather and avoid loose sides of skirting parts. Pollutants on surfaces of the leather and residual leather scale in the leather, particularly redundant residual fat, can be removed, and the preparation can have obvious effects on making up the inconsistency of pre-treatment procedures, reducing grain side defects and improving the product quality.

Description

technical field [0001] The invention belongs to the technical field of clean production of leather, and more specifically relates to an acid softening and degreasing compound enzyme preparation and its application in the softening process of leather leather or blue leather. Background technique [0002] In recent years, due to the increasingly stringent environmental protection laws, in order to comply with the general trend of energy conservation and emission reduction, many tanneries are buying blue leather or sour leather for production. Wet blue leather or acid leather produced by different manufacturers has many quality problems such as inconsistent fiber dispersion and uneven tanning. process can be removed. In addition, the stiff edges, dead wrinkles, fiber hardening and other grain defects caused by acid hides or wet blue hides piled up for a long time, there is still no way to fundamentally solve these problems. [0003] Studies have shown that acid protease has a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C5/00
CPCC14C5/00
Inventor 刘彦宋勇峰刘晓文张东方朱玲
Owner SICHUAN UNIV
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