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

Preparation method of coal-based composite chelating agent

A chelating agent, coal-based technology, applied in the direction of chemical instruments and methods, other chemical processes, etc., can solve the problems of unsatisfactory effect, high cost, limited source of matrix, etc., and achieve excellent chelating performance, good mechanical properties and low price cheap effect

Active Publication Date: 2014-04-30
陕西科博优超节能环保科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the inventors found in the research and development process that the current research on chelating adsorbents still has problems such as limited matrix sources, high costs, and unsatisfactory effects.

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
  • Preparation method of coal-based composite chelating agent
  • Preparation method of coal-based composite chelating agent
  • Preparation method of coal-based composite chelating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Taking 10g of raw coal powder as an example, the method for preparing a coal-based composite chelating agent consists of the following steps:

[0026] (1) Take 10g of coal powder with a particle size of 0.075mm, add 0.6g of γ-aminopropyltriethoxysilane and mix well for 3h. The mass ratio of coal powder to γ-aminopropyltriethoxysilane is 1:0.06 to obtain modified coal powder particles.

[0027] (2) Weigh 10g of the modified coal particles prepared in step (1) and place them in 12mL of acrylic acid, react at 75°C for 4 hours, wash twice with water, and dry to constant weight in a thermostat at 80°C to obtain aminopropyl Basicized pulverized coal particles;

[0028] (3) Dissolve 10g sodium carbonate in 10g hydroxylamine hydrochloride, add 10g aminopropylated coal powder, the mass ratio of aminopropylated coal powder to sodium carbonate and hydroxylamine hydrochloride is 1:1:1, mix well , Keep constant temperature reaction under 90℃ water bath condition for 4 hours, wash twice w...

Embodiment 2

[0030] Taking 10g of raw coal powder as an example, the method for preparing a coal-based composite chelating agent consists of the following steps:

[0031] (1) Take 10g of coal powder with a particle size of 0.075mm, add 0.4g of γ-aminopropyltriethoxysilane and mix well for 3h. The mass ratio of coal powder to γ-aminopropyltriethoxysilane is 1:0.04 to obtain modified coal powder particles.

[0032] (2) Weigh 10g of the modified coal particles prepared in step (1) and place them in 10 mL of acrylic acid, react at 75°C for 4 hours, wash twice with water, and dry to constant weight in a thermostat at 80°C to obtain aminopropyl Basicized pulverized coal particles;

[0033] (3) Dissolve 6g sodium carbonate in 6g hydroxylamine hydrochloride, add 10g aminopropylated coal powder, the mass ratio of aminopropylated coal powder to sodium carbonate and hydroxylamine hydrochloride is 1:0.6:0.6, mix well , Keep constant temperature reaction under 90℃ water bath condition for 4 hours, wash twic...

Embodiment 3

[0035] Taking 10g of raw coal powder as an example, the method for preparing a coal-based composite chelating agent consists of the following steps:

[0036] (1) Take 10g of coal powder with a particle size of 0.075mm, add 0.8g of γ-aminopropyltriethoxysilane and mix well for 3h. The mass ratio of coal powder to γ-aminopropyltriethoxysilane is 1:0.08 to obtain modified coal powder particles.

[0037] (2) Weigh 10 g of the modified coal particles prepared in step (1) and place them in 15 mL of acrylic acid, react at 75°C for 4 hours, wash twice with water, and dry to constant weight in a thermostat at 80°C to obtain aminopropyl Basicized pulverized coal particles;

[0038] (3) Dissolve 16g sodium carbonate in 16g hydroxylamine hydrochloride, add 10g aminopropylated coal powder, the mass ratio of aminopropylated coal powder to sodium carbonate and hydroxylamine hydrochloride is 1:1.6:1.6, mix well , Keep constant temperature reaction under 90℃ water bath condition for 4 hours, wash t...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a coal-based composite chelating agent. The method comprises the steps that powdered coal particles are taken as a substrate; the powdered coal particles are subjected to surface modification by a coupling agent, namely r-aminopropyl triethyl silane; polyacrylic acid is coupled and grafted on the surfaces of the powdered coal particles; amine oximation is conducted on the powdered coal particles; and then the coal-based composite chelating agent having good mechanical properties and high heavy metal ion chelation and adsorption capacity is prepared. Powdered coal is relatively cheap and has better mechanical strength, rich pore structure, large specific surface area and good adsorptive property. According to the preparation method, rich active functional groups such as -OH, -COOH and -CO- contained on a macromolecule skeleton of the powdered coal are utilized, the coal is taken as the substrate, and the coal-based composite chelating agent having good mechanical strength and excellent chelation property can be prepared.

Description

Technical field [0001] The invention belongs to the research technical field of chelating adsorbents, and particularly relates to a preparation method of a coal-based composite chelating agent. Background technique [0002] Chelation precipitation method is to use polymer heavy metal chelating agent to chelate with heavy metal ions in water to form water-insoluble flocculent heavy metal complex precipitation, remove heavy metal ions in wastewater, and apply it to waste incineration power generation. It also has unique effects in the treatment of gray heavy metals. The chelating precipitation method has high removal efficiency, wide pH application range, and good treatment effect, especially for low-concentration wastewater. The formed complex has stable properties and will not precipitate heavy metals under strong acid or strong alkaline conditions. Ion, heavy metal chelate is also very stable in the temperature range of -100℃-300℃. It can maintain polymer stability for hundred...

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 Patents(China)
IPC IPC(8): B01J20/22B01J20/30
Inventor 刘转年
Owner 陕西科博优超节能环保科技有限公司