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

Leather dyeing fatting agent and leather retanning dyeing process for reducing dye residue in dyeing wastewater

A fatliquoring agent and leather technology, applied in small raw hide/big raw hide/leather/fur treatment, small raw hide/big raw hide/leather skin/fur chemical treatment, dyeing method, etc., can solve the problem of difficult to meet emission requirements and treatment effects Poor quality, high cost, etc., to enhance the ability to absorb and fix dyes, promote absorption and fixation, and save costs

Inactive Publication Date: 2018-04-20
HENAN PROSPER SKINS & LEATHER ENTERPRISE
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, dyeing wastewater is recognized as one of the more difficult industrial wastewater at home and abroad, and has the characteristics of complex components, poor biodegradability, and difficult treatment.
The main treatment methods of wastewater are mainly divided into three types: physical method, chemical method and biological method. For dye wastewater, if any treatment process is used alone, the treatment effect is poor, and it is difficult to meet the discharge requirements. The comprehensive treatment process has cumbersome processes and high costs. and many other issues

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Leather dyeing fatting agent and leather retanning dyeing process for reducing dye residue in dyeing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] 1. Take 10 British wet blue hides and weigh 1.3KG each

[0134] 2. Peel the blue skin evenly

[0135] 3. Retanning and dyeing according to the following process

[0136] 1) Backwater: Drum the wet blue leather and return it with cold water for 30 minutes

[0137] 2) Neutralization Ⅰ: Beat 26L of 25°C water, add 13g of sodium formate to neutralize, rotate for 30 minutes, the pH is around 4.5 at the end, wash once with water after neutralization.

[0138] 3) Retanning: Beat 13L of water, the inner temperature of the drum is 45°C, add 1.56Kg of liquid chrome tannin TANESCO HN LIQ, rotate for 180 minutes, add 25g of acetic acid to wash twice after finishing.

[0139] 4) Neutralization Ⅱ: Beat 13L of water, the inner temperature of the drum is 45°C, add 325g of modified glutaraldehyde RELUGAN GT-50 and rotate for 120 minutes, then add 260g of anhydrous sodium acetate and rotate for 40 minutes, then add 195g of baking soda and rotate for 90 minutes, At the end, the pH is a...

Embodiment 2

[0156] 1. Take 10 British wet blue hides and weigh 1.3KG each

[0157] 2. Peel the blue skin evenly

[0158] 3. Retanning and dyeing according to the following process

[0159] 1) Backwater: Drum the wet blue leather and return it with cold water for 30 minutes

[0160] 2) Neutralization Ⅰ: Beat 26L of 25°C water, add 13g of sodium formate to neutralize, rotate for 30 minutes, the pH is around 4.5 at the end, wash once with water after neutralization.

[0161] 3) Retanning: Beat 13L of water, the inner temperature of the drum is 45°C, add 1.56Kg of liquid chrome tannin TANESCO HN LIQ, rotate for 180 minutes, add 25g of acetic acid to wash twice after finishing.

[0162] 4) Neutralization Ⅱ: Beat 13L of water, the inner temperature of the drum is 45°C, add 325g of modified glutaraldehyde RELUGAN GT-50 and rotate for 120 minutes, then add 260g of anhydrous sodium acetate and rotate for 40 minutes, then add 195g of baking soda and rotate for 90 minutes, At the end, the pH is a...

Embodiment 3

[0179] 1. Take 10 British wet blue hides and weigh 1.3KG each

[0180] 2. Peel the blue skin evenly

[0181] 3. Retanning and dyeing according to the following process

[0182] 1) Backwater: Drum the wet blue leather and return it with cold water for 30 minutes

[0183] 2) Neutralization Ⅰ: Beat 26L of 25°C water, add 13g of sodium formate to neutralize, rotate for 30 minutes, the pH is around 4.5 at the end, wash once with water after neutralization.

[0184] 3) Retanning: Beat 13L of water, the inner temperature of the drum is 45°C, add 1.56Kg of liquid chrome tannin TANESCO HN LIQ, rotate for 180 minutes, add 25g of acetic acid to wash twice after finishing.

[0185] 4) Neutralization Ⅱ: Beat 13L of water, the inner temperature of the drum is 45°C, add 325g of modified glutaraldehyde RELUGAN GT-50 and rotate for 120 minutes, then add 260g of anhydrous sodium acetate and rotate for 40 minutes, then add 195g of baking soda and rotate for 90 minutes, At the end, the pH is a...

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 provides a leather dyeing fatting agent which comprises the following components in parts by weight: 0.5-1 part of a cation aluminum-zirconium organic metal complexing coupling agent, 2-4 parts of amino resin modified collagen, 1.5-3 parts of sulfonation synthetic oil, 1.5-3 parts of lecithin, 0.5-0.75 part of an emulsifier and 5-7 parts of a dye. The invention discloses a novel leather dyeing fatting agent and a retanning dyeing process, cation coupled type leather dyeing aids are combined with the amino resin modified collagen for one-bath dyeing, absorption and fixation of dyes by leather in the dyeing process are improved, the dyes can be relatively completely absorbed by leather fibers, then dye molecule residues in wastewater are reduced, and the dye wastewater aftertreatment difficulties are reduced. By adopting the technical scheme of the invention, development of modern leather making can be met, urgent requirements of leather plants can be met, the cost is greatly reduced, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of leather treatment and processing, and relates to a leather dyeing and fatliquoring agent and a leather retanning dyeing process, in particular to a leather dyeing and fatliquoring agent and a leather dyeing process for reducing the residual amount of dye in dyeing wastewater. Background technique [0002] Leather processing has a history of thousands of years. After a long period of development, tanning has developed from a simple manual operation to an important industrial technology field. Since the early 1980s, my country's leather industry has developed by leaps and bounds, and it has become one of the most important leather and leather product production centers in the world. my country's cowhide, pigskin, sheepskin and other resources rank first in the world, and its annual output of light leather ranks first in the world, accounting for more than 20% of the world's total. Moreover, the leather indu...

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
IPC IPC(8): D06P1/39D06P1/44D06P3/32C14C3/08
CPCC14C3/08D06P1/39D06P1/445D06P3/3206
Inventor 孙要刚冯献青杨翼杨澍闫欣
Owner HENAN PROSPER SKINS & LEATHER ENTERPRISE