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

Sulfydryl modified charcoal based on agricultural wastes, preparation method and application thereof

A technology of agricultural waste and biochar, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as non-environmental protection, complicated process, etc., achieve short adsorption time, simple preparation process, and good social benefits and environmental benefits

Inactive Publication Date: 2018-06-19
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of preparing biochar from agricultural waste has the disadvantages of complicated process and unenvironmental protection

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
  • Sulfydryl modified charcoal based on agricultural wastes, preparation method and application thereof
  • Sulfydryl modified charcoal based on agricultural wastes, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] A method for preparing agricultural waste-based mercapto-modified biochar provided by an embodiment of the present invention includes:

[0017] Take an appropriate amount of agricultural waste, crush it, dry it and grind it, so that the agricultural waste is granular. Under the condition of anaerobic or anoxic, 300-700°C, the agricultural waste particles are heated to obtain biochar. The product is a crude product. In order to obtain biochar with uniform particles and easy processing, the biochar is passed through a 50-70 mesh sieve, and the biochar under the sieve is taken as the first sieve, and is set aside. In the present invention, agricultural waste mainly includes fruit skins, peanut skins, waste leaves and the like.

[0018] Take the first sieve, add concentrated nitric acid, stir magnetically at 40-70°C for 24-48 hours to oxidize the biochar under the sieve with concentrated nitric acid, filter the mixed solution with water, wash the filter residue with water,...

Embodiment 1

[0027] This example provides a mercapto-modified biochar based on agricultural waste, which is mainly made by the following steps:

[0028] Take an appropriate amount of agricultural waste, crush it, dry it and grind it, so that the agricultural waste is granular. Under the condition of limited oxygen and 300°C, the agricultural waste particles were heated to obtain biochar. The biochar is passed through a 50-mesh sieve, and the biochar under the sieve is taken as the first sieve.

[0029] Take the first sieve, add concentrated nitric acid, stir magnetically at 40°C for 24 hours to oxidize the biochar under the sieve with concentrated nitric acid, filter the mixture with suction, wash the filter residue with water, and then dry to obtain oxidized biochar. The mass ratio of the first undersize to concentrated nitric acid is 1:2. Pass the oxidized biochar through a 70-mesh sieve, take the oxidized biochar under the sieve as the second sieve, and save it for future use.

[003...

Embodiment 2

[0032] This example provides a mercapto-modified biochar based on agricultural waste, which is mainly made by the following steps:

[0033] Take an appropriate amount of agricultural waste, crush it, dry it and grind it, so that the agricultural waste is granular. Under the condition of limited oxygen and 700°C, the agricultural waste particles were heated to obtain biochar. The biochar is passed through a 70-mesh sieve, and the biochar under the sieve is taken as the first sieve.

[0034] Take the first sieve, add concentrated nitric acid, stir magnetically at 70°C for 48 hours to oxidize the biochar under the sieve with concentrated nitric acid, filter the mixed solution with suction, wash the filter residue with water, and then dry to obtain oxidized biochar. The mass ratio of the first undersize to concentrated nitric acid is 1:5. Pass the oxidized biochar through a 90-mesh sieve, take the oxidized biochar under the sieve as the second sieve, and save it for future use. ...

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 sulfydryl modified charcoal based on agricultural wastes, a preparation method and application thereof, and relates to the technical field of environmental protection. The preparation method of the sulfydryl modified charcoal based on agricultural wastes comprises the following steps: carrying out pyrolysis on raw materials of the agricultural wastes under anaerobic or anoxic condition so as to obtain charcoal; sieving the charcoal through a sieve of 50 to 70 meshes, taking a first screen underflow to be mixed with concentrated nitric acid for oxidation to obtain oxidized charcoal; sieving the oxidized charcoal through a sieve of 70 to 90 meshes, taking a second screen underflow to be mixed with a sulfhydryl compound for ultrasonic treatment, and then carrying outsuction filtration and drying. The preparation method is simple in technology and high in controllability, and is easy for industrial production. The sulfydryl modified charcoal prepared by using thepreparation method of the sulfydryl modified charcoal based on the agricultural wastes is good in adsorption performance, high in stability and short in adsorption time.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and in particular to mercapto-modified biochar based on agricultural waste and its preparation method and application. Background technique [0002] Agricultural waste refers to organic substances that are discarded during the entire agricultural production process, mainly including: plant residue waste generated in the process of agricultural and forestry production, animal residue waste generated in the process of animal husbandry and fishery production, agricultural processing process Residual waste from processing and domestic waste from rural and urban areas. China is the country with the largest output of agricultural waste in the world, with an annual output of more than 4 billion tons. With the continuous development of the agricultural economy, the output of crops has increased, and the number of livestock and poultry breeding has also gradually increased, resulting in ...

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): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20C02F1/283C02F2101/20
Inventor 李保庆罗维龚嘉欣
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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