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Zirconium-aluminum-titanium complex tanning agent based less-chrome tanning method

A technology of coordinating tanning agents and chrome tanned leather, applied in the field of leather tanning, to achieve the effects of good matching, pollution reduction, and good industrial production basis

Inactive Publication Date: 2012-11-21
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these chromium-less tannings reduce chromium pollution, either the performance of the finished leather has decreased, or a new pollution (such as zinc) has been brought, so they have not really been promoted in industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (4) Stand still: put the horse on the horse and let it stand for 2 to 3 days.

[0030] Example 2:

[0031] (1) Pretreatment: Weigh the goat hides after standardized deliming and softening, and place them in a suspended wooden drum. Next, add 80 parts of water, add 2 parts of ZA compound tanning agent into the drum, and rotate for 30 minutes; the speed is 10rpm.

[0032] (2) Tanning with zirconium-aluminum-titanium compound tanning agent: stop the drum, open the drum door, add a total of 8 parts of DMT-II compound tanning agent and 2 parts of kaolin from the drum door, first add half of the total amount of DMT- Ⅱ with tanning agent and kaolin, rotate for 60 minutes, then add the other half of DMT-Ⅱ with tanning agent and kaolin, continue to rotate for 150 minutes; then add baking soda to raise alkali, adjust the pH to 2.5~3.5.

Embodiment 2

[0034] (4) Stand still: put the horse on the horse and let it stand for 2 to 3 days.

[0035] Example 3:

[0036] (1) Pretreatment: Weigh the bare pigskin skin after standardized deliming and softening, and place it in a suspended wooden drum. The weight of the skin is increased to 150%, and the weight of the skin in the drum is 100 parts; At room temperature, add 100 parts of water, 1 part of DMT-I compound tanning agent and 1 part of ZA compound tanning agent into the drum, and rotate for 30 minutes; the rotation speed is 9 rpm.

[0037] (2) Tanning with zirconium-aluminum-titanium compound tanning agent: stop the drum, open the drum door, add a total of 12 parts of DMT-Ⅱ compound tanning agent and 2.5 parts of kaolin from the drum door, and first add half of the total amount of DMT- Ⅱ with tanning agent and kaolin, rotate for 60 minutes, then add the other half of DMT-Ⅱ with tanning agent and kaolin, continue to rotate for 120~180 minutes; then add baking soda to adjust t...

Embodiment 3

[0039] (4) Stand still: put the horse on the horse and let it stand for 2 to 3 days.

[0040] Application example 4

[0041] (1) Pretreatment: Weigh the standardized softened sheep fur, place it in the trough, increase the weight of the skin to 120%, and the weight of the fur in the drum is 100 parts; at room temperature, add 2000 parts of water, Add 2 parts of DMT-I blended tanning agent and 2 parts of ZA blended tanning agent into the drum, and rotate for 30 minutes; the rotation speed is 9 rpm.

[0042](2) Tanning with zirconium-aluminum-titanium compound tanning agent: stop the groove, add a total of 12 parts of DMT-Ⅱ compound tanning agent and 3 parts of kaolin, first add half of the total amount of DMT-Ⅱ compound tanning agent and kaolin, After turning for 60 minutes, add the other half of DMT-II combined with tanning agent and kaolin, and paddle continuously for 120 minutes; then add baking soda to increase the alkali, and adjust the pH to 2.5.

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Abstract

The invention discloses a zirconium-aluminum-titanium complex tanning agent based less-chrome tanning method which is characterized in that a zirconium-aluminum-titanium complex tanning agent and a chrome tanning agent are combined to tan pigskin, cow leather and sheepskin, wherein the shrinkage temperature of industrially produced crust leather can reach 95 DEG C; the leather can be saved for a long time without detanning; the leather is full, the appearance of the leather is in shallow lake blue, and all physical and mechanical performance indexes can reach the industrial standard; and pickling is avoided so as to avoid chloride ion pollution, phosphorous pollution and the release of formaldehyde. Due to the adoption of the method, the chrome tanning agent can be saved by more than 50 percent, and the Cr2O3 content in the waste tanning liquor is smaller than 50 mg / L, as a result, the pollution for human and environment of the heavy metal chromium in leather waste and in the leather production process is greatly reduced. Therefore, the method opens a new way for tanneries and fur factories to produce less-chrome tanned leather and fur.

Description

technical field [0001] The invention belongs to the field of leather tanning, in particular to a method for tanning leather with less chromium based on a zirconium-aluminum-titanium complex tanning agent. Background technique [0002] In recent years, my country's leather industry has developed rapidly and has gradually developed into a world leather production, processing and trade center. Since Dennis invented the one-bath chrome tanning method in 1883, due to the good comprehensive performance of chrome tanned leather, chrome tanning agent has become the main tanning agent for leather (light leather) tanning, which is almost irreplaceable. With the development of the times and the continuous progress of society, chrome tanning is also facing severe challenges. On the one hand, chromium has limited reserves in the world and is a non-renewable resource. my country is a chromium-poor country, and it is an unavoidable reality that a large amount of chromium will be exhauste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/02
Inventor 但卫华王康建但年华何青陈哲
Owner SICHUAN UNIV
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