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Alkaline compound dehairing enzyme preparation for tanning and its application process

A depilatory enzyme and alkaline technology, applied in the field of leather cleaning production, can solve the problems of endless depilation, damage, and long depilation time, and achieve the effects of eliminating pollution, reducing pollution load, and improving reuse value.

Inactive Publication Date: 2018-01-05
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an alkaline compound enzyme preparation composed of multiple enzymes and auxiliary agents to assist in the enzyme depilation, aiming at the deficiency of the current enzymatic hair removal technology, and to eliminate the disadvantages of single enzyme depilation by utilizing the synergistic effect between the components , to solve technical problems such as large amount of enzyme and long time of hair removal, excessive hydrolysis of collagen by enzyme, easy to cause loose leather or even grain damage, endless hair removal, and small hairs

Method used

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  • Alkaline compound dehairing enzyme preparation for tanning and its application process
  • Alkaline compound dehairing enzyme preparation for tanning and its application process
  • Alkaline compound dehairing enzyme preparation for tanning and its application process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: There is warm and bath depilation in the yellow cowhide drum

[0040] The optimum pH value is 7.6-12, and the enzyme activity is 100,000 units / g. Keratinase AK 3kg produced by Heben Biotechnology Co., Ltd.; the optimum pH value is 3-12, and the enzyme activity is 100,000 units / g 1kg of lipase LP-1000 produced by Jiangsu Boli Biological Products Co., Ltd.; 1kg of 2709 protease with optimum pH value of 9-12 and enzyme activity of 50,000 units / g; calcium phosphate 1kg; osmotic agent T 3kg; carbonic acid Sodium hydrogen 30kg; sodium carbonate 15.5kg; sodium dihydrogen phosphate 5kg; sodium tripolyphosphate 2kg; kaolin 4kg; starch 1.5kg;

[0041] Take 100kg of animal skins soaked in water and de-fleshed according to the conventional method, put them into the drum, adjust the temperature to 30-35°C, add 100kg of water at the same temperature, adjust the pH value to 8.5-10.5, first add 0.2kg of lipase ZG, and degrease Process for 90-120 minutes. Without changin...

Embodiment 2

[0042] Embodiment 2: Water immersion depilation in yellow cowhide drum (slotted)

[0043] The optimum pH value is 7.6-12, and the enzyme activity is 100,000 units / g. Keratinase AK 3kg produced by Heben Biotechnology Co., Ltd.; the optimum pH value is 3.0-12, and the enzyme activity is 100,000 units / g 1kg of lipase LP-1000 produced by Jiangsu Boli Biological Products Co., Ltd.; 1kg of 2709 protease with optimum pH value of 9-12 and enzyme activity of 50,000 units / g; calcium chloride 1kg; Pingpingjia 3kg; carbonic acid Sodium hydrogen 30kg; sodium carbonate 15.5kg; sodium dihydrogen phosphate 5kg; sodium tripolyphosphate 2kg; kaolin 4kg; starch 1.5kg;

[0044] Take 100kg of salted yellow cowhide and put it into the drum, add 300kg of warm water (30-34°C), wash for 20 minutes, and discard the waste water; add 300kg of warm water (30-34°C), wash for 20 minutes, and discard the waste water. Add 100kg of water to adjust the temperature to 34-35°C, adjust the pH value to 9.0-9.5 wit...

Embodiment 3

[0045] Embodiment 3: pigskin rolling enzyme, coating enzyme stacking depilation

[0046] The optimum pH value is 7.6-12, and the enzyme activity is 100,000 units / g. Keratinase AK 6kg produced by Heben Biotechnology Co., Ltd.; the optimum pH value is 3.0-12, and the enzyme activity is 100,000 units / g 2kg of lipase LP-1000 produced by Jiangsu Boli Biological Products Co., Ltd.; 1kg of 2709 protease with optimum pH value of 9-12 and enzyme activity of 50,000 units / g; calcium chloride 1kg; JFC 1kg; twelve 2kg of sodium alkyl sulfate; 30kg of sodium bicarbonate; 15.5kg of sodium carbonate; 5kg of sodium dihydrogen phosphate; 2kg of sodium tripolyphosphate; 5.5kg of wood flour;

[0047] Take 100 parts of pigskin after soaking in water, removing meat and degreasing according to the conventional method, put it into the drum, adjust the temperature to 32 ° C, control the water, add 6 kg of sodium chloride, 0.2 kg of bactericidal preservative into the drum, and rotate for 40 minutes Ad...

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PUM

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Abstract

The invention discloses an alkaline complex unhairing enzyme preparation for tanning and an application process of the alkaline complex unhairing enzyme preparation. The unhairing enzyme preparation comprises a complex unhairing enzyme and an assistant, wherein the complex unhairing enzyme comprises, by weight, 1-20 parts of alkaline keratinase, 1-10 parts of 2709 protease and 0.5-10 parts of lipase. The complex unhairing enzyme preparation can be suitable for unhairing through a yarding unhairing method and an inner drum(paddle) bathing unharing method in the manufacturing process of various kinds of common animal skin and tan with various functions. According to the alkaline complex unhairing enzyme preparation, due to the synergistic effect between the protease, the lipase, an saccharifying enzyme and the assistant, the ideal unhairing effect is achieved, the technological problems that an unhairing enzyme preparation in the prior art is long in unhairing time, large in collagen loss, poor in safety, prone to causing tan grain side damage and tan looseness, unable to completely remove hairs and the like are solved, and pollution of sulfide is fundamentally eliminated; and meanwhile, an enzyme method achieves hair saving unhairing, and the reusing value of recovered hairs is improved.

Description

technical field [0001] The present invention relates to the depilation technology of leather animal skin, more specifically, relates to a kind of animal skin depilation agent containing compound hair depilation enzyme and auxiliary agent, in order to realize sulfide-free bio-enzyme depilation of tanning raw material skin, suitable for all The depilation of animal skin belongs to the field of leather cleaning production. Background technique [0002] Dehairing is the main step in the pre-tanning process of tanning. Main depilation method in the industrialized production of tannery is the ash-alkali method depilation based on sulfide (sodium sulfide and sodium hydrosulfide) and lime at present. Because of its advantages of easy availability of raw materials, low cost, simple operation and easy control, and high hair removal efficiency, it has been used until now. This method is to remove hair by dissolving hair with a large amount of sulfide. The waste liquid produced by dep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C1/06
CPCC14C1/065
Inventor 刘彦张东方刘晓文宋勇峰朱玲
Owner SICHUAN UNIV
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