A method for high absorption chrome tanning using cross-linking enzyme preparation
By pretreating the proteins in the hide with a cross-linking enzyme preparation before chrome tanning, the problem of insufficient absorption of chrome tanning agents was solved, achieving efficient absorption and clean production of chrome tanning agents.
CN118813875BActive Publication Date: 2026-06-02QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
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Patent Information
- Application Number
- CN202411219124.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2026-06-02
- Estimated Expiration
- 2044-09-02
AI Technical Summary
Technical Problem
Existing chrome tanning methods have insufficient absorption rates of chrome tanning agents, leading to environmental pollution and resource waste. Furthermore, traditional chemical auxiliaries are complex to operate in practice, and the activity of enzyme preparations is easily affected, making them difficult to use effectively.
Method used
Pretreatment with cross-linking enzymes before tanning promotes the binding of chrome tanning agents to skin collagen and increases the absorption rate of chrome tanning agents by pre-acting on the functional groups of proteins in the skin.
Benefits of technology
It increases the absorption rate of chromium tanning agents by 5%-15%, reduces waste emissions, achieves clean production, is simple to operate, and is easy to apply in practice.
✦ Generated by Eureka AI based on patent content.
Abstract
The present application belongs to the field of leather industry production, and particularly relates to a method for high absorption chrome tanning by using cross-linking enzyme preparation. The method comprises the following steps: water immersion, unhairing and liming, deliming, softening, enzyme-assisted tanning, and acid immersion tanning. The enzyme-assisted tanning is assisted by using cross-linking enzyme preparation. The cross-linking enzyme preparation is not used in combination with the hydrolytic enzyme in the softening step. The cross-linking enzyme comprises glutamine transaminase (TG enzyme). The comprehensive activity of the cross-linking enzyme is controlled to be 1-30 U / ml in the application process, and the activity of the TG enzyme is controlled to be 1-20 U / ml. The process in the present application meets the environmental protection requirements. Firstly, the tanning agent absorption rate in the tanning process is successfully improved, and the waste discharge amount in the tanning process is reduced. Secondly, the cleaner cross-linking enzyme preparation is successfully used to replace the chemical auxiliary agent to improve the tanning agent absorption rate. Thirdly, the process operation is simplified.
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