Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing porous carbon material by utilizing waste in leather making with aldehyde-plant combined tanning method

A porous carbon material combined with tanning technology, which is applied in the field of preparation of porous carbon materials, can solve problems such as solid waste generation, achieve the effects of reducing the application ratio, improving resource allocation, and solving the problem of chromium pollution

Pending Publication Date: 2019-04-26
QILU UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Similar to chrome tanned leather, in the aldehyde-vegetable tanning process, a large amount of solid waste will be generated due to trimming, edge trimming, etc.

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
  • Method for preparing porous carbon material by utilizing waste in leather making with aldehyde-plant combined tanning method
  • Method for preparing porous carbon material by utilizing waste in leather making with aldehyde-plant combined tanning method
  • Method for preparing porous carbon material by utilizing waste in leather making with aldehyde-plant combined tanning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1, a method for preparing porous carbon materials from wastes in the aldehyde-vegetable combined tanning process,

[0062] Including the following steps,

[0063] Firstly, use alkaline protease preparation to pretreat the waste produced in the process of aldehyde-vegetable combined tanning. The pretreatment steps are as follows:

[0064] (1) Enzyme treatment step: carry out in the drum, after the aldehyde-plant waste is collected and weighed dry weight (about 1 kg), the water consumption is 150% of the dry weight; rotate for 15 minutes to completely soak the water; then add alkali Sodium salt or calcium salt, make the pH of the solution reach 10, add 1% alkaline protease, the activity is 5000 U-10000 U, after reacting for 1 hour, the temperature is 40 ℃ - 60 ℃, wash, dry and pulverize;

[0065] Above-mentioned basic sodium salt can adopt sodium chloride or sodium sulfate or sodium carbonate or sodium hydroxide or sodium bicarbonate or sodium acetate.

[0066] ...

Embodiment 2

[0072] Example 2, a method for preparing porous carbon materials using wastes in aldehyde-vegetable combined tanning process,

[0073] Including the following steps,

[0074] Firstly, neutral protease preparation is used to pretreat the waste generated in the aldehyde-vegetable tanning process, and the pretreatment steps are as follows:

[0075] (1) Enzyme treatment: carry out in the drum, after the aldehyde-plant waste is collected and weighed dry weight (about 1 kg), the water consumption is 150% of the dry weight; rotate for 15 minutes to completely soak the water; then add a small amount Sodium bicarbonate, make the pH of the solution reach 7, add 8% neutral protease, activity (5000 U-10000 U), temperature at 40°C-60°C, react for 1.5 h, wash, dry and pulverize;

[0076] (2) Preliminary carbonization step: the pulverized product was reacted at 350 °C for 1.5 h under nitrogen atmosphere, and then heated at 600 °C for 2 h;

[0077] (3) Advanced treatment step: Grind and pul...

Embodiment 3

[0082] Embodiment 3, a kind of method that utilizes the waste in the aldehyde-vegetable combined tanning method to prepare porous carbon material, comprises the following steps:

[0083] (1) Enzyme treatment: carry out in the drum, after the aldehyde-plant waste is collected and weighed dry weight (about 1 kg), the water consumption is 150% of the dry weight; rotate for 15 minutes to completely soak the water; then add a small amount Sodium bicarbonate, make the pH of the solution reach 10, add 0.3% collagenase, activity (50000 U-80000 U), temperature at 40°C-60°C, react for 1.5 h, wash, dry and pulverize;

[0084] (2) Preliminary carbonization step: react the pulverized product at 350 °C for 1.5 h in a nitrogen atmosphere, then raise the temperature to 600 °C for 2 h;

[0085] (3) Advanced treatment step: Grind and pulverize the product after preliminary carbonization, mix it with potassium salt at a mass ratio of 1:2, soak it in water, keep stirring and reacting at 45°C for ...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a porous carbon material by utilizing waste in leather making with an aldehyde-plant combined tanning method. The method comprises the following steps: 1) a pretreatment step: pretreating waste generated in the aldehyde-plant combined tanning process by a protease preparation; and 2) a high-temperature treatment step: performing high-temperature treatment on the product after pretreatment in the step 1) to obtain a porous carbon material. The method has the following beneficial effects: the porous carbon material with the specific surface area being 700 to 1000 m<2> / g; the problem of pollution by leather making solid waste can be effectively solved by the method; and the aldehyde-plant combined tanning solid waste is treated by the protease and an inorganic salt reagent, so that the process is simple and the treatment difficulty that the solid waste is difficult to treat conventionally after tanning in the production process is reduced.

Description

technical field [0001] The invention relates to the field of tanning solid waste treatment, in particular to a method for preparing porous carbon materials from the waste in tanning with aldehyde-vegetable combined tanning. Background technique [0002] In the process of tanning, chrome tanning is currently the main method of tanning leather, but chrome tanning has caused a negative impact on the environment that cannot be ignored. Therefore, a series of new chrome-less chrome-free tanning methods can be developed and utilized. [0003] Aldehyde-vegetable combined tanning method is a tanning method that has received extensive attention in recent years and can replace chrome tanning, and has been applied to a certain scale in actual production. The leather produced by aldehyde-vegetable combined tanning has better physical and chemical properties and sensory properties. [0004] Existing aldehyde-vegetable combined tanning process adopts the following method to carry out: ...

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): C01B32/05
CPCC01B32/05
Inventor 曹珊宋金枝李昊
Owner QILU UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com