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Processing technology of cowhide and degreasing agent used for cowhide

A processing technology and degreasing agent technology, which is applied in leather degreasing, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. , environmental pollution and other problems, to achieve the effect of resource utilization, improve degreasing effect, and reduce pollution

Active Publication Date: 2019-05-24
福建漳州市德昌皮业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degreasing sewage generated in this way has complex components, is not easy to handle, and will pollute the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0034] Take by weighing 3.2kg of shaved dander and ox hair, dissolve 0.192 kg of sodium hydroxide in 2 kg of water to make sodium hydroxide solution, place shaved dander and ox hair in sodium hydroxide solution, and dissolve them at 95 It was condensed and refluxed at ℃ for 8 hours, the hydrolyzate was suction-filtered, and the filtrate was collected. Add 0.2ml of lauroyl chloride dropwise to the filtrate at 60°C, and stir while reacting to maintain the reaction pH at 9, and stir for 3 hours to obtain the product.

preparation example 2

[0036] Take by weighing 3.2kg shavings and ox hair, 0.256kg of sodium hydroxide is dissolved in 2.5kg of water to make sodium hydroxide solution, shavings and ox hair are placed in sodium hydroxide solution, Condensate and reflux at 110°C for 6 hours, filter the hydrolyzate with suction, and collect the filtrate. Add 0.23ml of lauroyl chloride dropwise to the filtrate at 65°C, stir while reacting, keep the reaction pH at 10, and stir for 4 hours to obtain the product.

preparation example 3

[0038] Take by weighing 3.2kg shavings and ox hair, 0.224kg of sodium hydroxide is dissolved in 2.2kg of water to make sodium hydroxide solution, shavings and ox hair are placed in sodium hydroxide solution, Condensate and reflux at 100°C for 7 hours, filter the hydrolyzate with suction, and collect the filtrate. Add 0.21ml of lauroyl chloride dropwise to the filtrate at 63°C, stir while reacting, keep the reaction pH at 9, and stir for 3.5h to obtain the product.

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PUM

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Abstract

The invention relates to a processing technology of cowhide and a degreasing agent used for the cowhide and belongs to the technical field of leather processing. The technology comprises the steps ofpretreatment, degreasing, depilation, tanning and post-finishing, wherein a hydrolyzed-protein type surfactant is adopted for treating the cowhide during degreasing, and sodium hydroxide and hydrogenperoxide are adopted for treating the cowhide. The degreasing agent has the effects that the pollution caused by waste liquid generated by processing is small, treatment is easy, and the degreasing efficiency is high. The provided degreasing agent has the advantages of being environmentally friendly, safe and good in degreasing effect.

Description

technical field [0001] The invention relates to the technical field of leather processing, more specifically, it relates to the processing technology of cowhide leather and its degreasing agent for cowhide. Background technique [0002] Leather is denatured and non-perishable animal skin obtained through physical and chemical processing such as depilation and tanning. Leather is composed of natural protein fibers tightly woven in three-dimensional space. Its surface has a special grain layer, which has natural texture. Grainy and glossy, comfortable to the touch. Cowhide leather is leather made from cowhide by the above method. In the process of preparing cowhide leather, it is necessary to degrease the cowhide. Degreasing is to remove a large amount of fat contained in the raw hide. The result of degreasing will seriously affect the quality of the finished leather. the quality of. At present, degreasing generally needs to remove the meat on the raw material skin, cut off ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C5/00C14C1/08
Inventor 许永芳
Owner 福建漳州市德昌皮业有限公司