Unlock instant, AI-driven research and patent intelligence for your innovation.

Electro-degradation method for furred animal skin or hair

An animal skin and electrolytic cell technology, which is applied in the field of protein chemistry and chemical industry, can solve the problems of difficult product purification, non-recycling, human and equipment damage, etc., achieving high purity of electro-degraded wool protein, eliminating divalent sulfur emissions in wastewater, reducing The effect of wastewater COD

Inactive Publication Date: 2012-06-27
SICHUAN UNIV
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that the pH of the aqueous solution of sulfide is greater than 14, which can quickly dissolve keratin, resulting in rapid hair removal by application, but a large amount of sulfide mixed with the dissolved hair cannot be recovered
Secondly, the COD (chemical oxygen demand), BOD (biological oxygen demand), TSS (total suspended solids) and S2- (sulfide) contents in the discharged wastewater are very high, and a lot of sludge is produced after the waste liquid settles. Difficult to handle, causing serious pollution to the environment
Due to the high content of alkali sulfide and its toxic effect on the biological world, the raffinate produced by the sodium sulfide hair removal process and the hydrogen sulfide volatilized into the air cause damage and corrosion to people and equipment
[0004] Animal hair is the most important source of keratin. A large amount of animal hair cannot be used for textiles, but it is a good raw material for protein feed. The methods of degrading hair mainly use alkali method and reduction method. The purification of the product is relatively difficult, and the waste water is discharged. many

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Electrodegradation of pig hair The graphite plate is used as the negative and positive poles in the electrolytic cell of the wooden chute, and the electrodes are fixed at both ends of the chute. Add 100kg of water at a temperature of 30°C, add NaCl with a concentration of 2g / L as a supporting electrolyte, and then add The pig hair of electrolyte solution 10%wt is put in the electrolytic cell, makes the pig hair all be immersed in electrolyte solution, regulates the voltage of direct current steady voltage power supply so that the electric field voltage in electrolysis process is at 4V, and electric current is maintained at 80mA, degrades 60min under agitation, when After the pig hair is degraded, it is separated and collected by a centrifuge to collect the hair solution.

Embodiment 2

[0021] In the electrolytic cell of the electrolytic degradation wooden chute of goose feathers, the graphite plate is used as the anode, and the titanium plate is used as the cathode. The electrodes are fixed at both ends of the chute and connected to the DC power supply respectively. Add 40°C, 200kg water, add 4g / L NaCl, and then add 10%wt of electrolyte solution. Goose feathers are put into the electrolytic cell, so that all the goose feathers are immersed in the electrolyte solution, and the voltage of the DC stabilized power supply is adjusted to make the electric field during the electrolysis process The voltage was 8V, the current was maintained at 150mA, and the goose feathers were degraded for 80 minutes under stirring. After the goose feathers were degraded, the wool solution was separated and collected by a centrifuge.

Embodiment 3

[0023] In the electrolytic cell of the electrodegradation and depilation epoxy resin clad chute with hairy goatskin, iron is used as the cathode and anode. Add 50℃, 500kg water, add 2g / L Na 2 SO 4 , then add the hairy goatskin of 10% wt of electrolyte solution and put it into the electrolytic cell, so that all the haired goatskins are immersed in the electrolyte solution, adjust the voltage of the DC stabilized power supply so that the electric field voltage in the electrolysis process is at 10V, and the current is maintained at 180mA. Degrade under stirring for 100min, when the goatskin with hair is degraded, separate and collect the goatskin and wool degradation solution with a centrifuge.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an electro-degradation method for furred animal skin or hair. The method is characterized by comprising the following steps: in an electrolytic bath with solid conductive materials as an anode and a cathode, adding NaCl or Na2SO4 with a concentration of 2 to 5 g / L into 100 to 500 parts of water with a temperature of 30 to 50 DEG C as supporting electrolyte, putting furred animal skin or hair accounting for 10 wt% of an electrolyte solution in the electrolytic bath, totally immersing the furred animal skin or hair in the electrolyte solution, adjusting the voltage of a DC stabilized power supply so as to allow electric field voltage in the process of electrolysis to be 4 to 12 V, maintaining a current to be 80 to 220 mA, carrying out degradation under stirring for 60 to 20 min, carrying out separation with a centrifuge after the furred animal skin or hair is fully degraded and respectively collecting a degraded fur solution and degraded animal skin or collecting a degraded hair solution.

Description

technical field [0001] The invention relates to a method for electrodegrading furred animal skin or hair, belonging to the field of protein chemistry and chemical engineering. technical background [0002] Since the 1940s, electrochemistry has been industrialized in various chemical batteries, industrial cells, and electrocorrosion. Over the past half a century, with the in-depth research and understanding of the essence of energy conversion and transfer in the chemical reaction process, electrochemistry has gradually become an important research field and comprehensive technology in chemistry, and it has also promoted electrochemistry in synthetic electrochemistry, Advances in bioelectrochemistry and environmental electrochemistry have provided new approaches to green organic synthesis, new functional development of biological materials, and wastewater treatment, and have played an important role in industrial energy conservation and emission reduction. For synthetic chemi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/00B09B3/00
CPCY02W30/78
Inventor 单志华陈慧冯国涛何炳其杜晓声
Owner SICHUAN UNIV