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Method for preparing sulfonated coal in closed cycle

A closed-loop, sulfonated coal technology, used in chemical instruments and methods, other chemical processes, chemical/physical processes, etc.

Inactive Publication Date: 2012-05-02
张建旺 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are many literatures and patent reports on the production method of sulfonated coal, that is, research on the production method of sulfonated coal in terms of coal type, coal particle size, acid coal ratio, reaction temperature, reaction time, etc. The method of obtaining sulfonated coal has not been reported

Method used

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  • Method for preparing sulfonated coal in closed cycle
  • Method for preparing sulfonated coal in closed cycle
  • Method for preparing sulfonated coal in closed cycle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Break the moderately metamorphic bituminous coal with a volatile content greater than 20% from Pingshuo Coal Mine in Shanxi into granules with a particle size of 2.0-4.0mm, dry the water, weigh it, put it into a temperature-controlled stirring reaction device, and press acid coal Weight ratio (4~5): 1, add concentrated sulfuric acid;

[0025] Step 2: Stir and heat to 120°C to 160°C, stop heating after the reaction is in progress, pass the hot steam generated in the reaction device into the condenser to obtain dilute sulfuric acid, send it to the sulfuric acid mixer, and react at constant temperature for 9 to 11 hours;

[0026] Step 3: Cool the reactant and filter to obtain filtrate and solid matter. The filtrate is residual sulfuric acid, which is sent to a sulfuric acid mixer. Sulfuric acid, sent to the sulfuric acid mixer;

[0027] Step 4: Add NaOH solution of 0.3 times the amount of the solid to the above solid product to neutralize it until it is close to n...

Embodiment 2

[0029] Step 1: Break the moderately metamorphic bituminous coal with a volatile content greater than 20% from Pingshuo Coal Mine in Shanxi into granules with a particle size of 2.0-4.0mm, dry the water, weigh it, put it into a temperature-controlled stirring reaction device, and press acid coal Weight ratio (5~6): 1, add sulfuric acid mixed solution;

[0030] Step 2: Stir and heat to 120°C to 160°C, stop heating after the reaction is in progress, pass the hot steam generated in the reaction device into the condenser to obtain dilute sulfuric acid, send it to the sulfuric acid mixer, and react at constant temperature for 9 to 11 hours;

[0031] Step 3: Cool the reactant and filter to obtain filtrate and solid matter. The filtrate is residual sulfuric acid, which is sent to a sulfuric acid mixer. Sulfuric acid, sent to the sulfuric acid mixer;

[0032] Step 4: Add NaOH solution of 0.3 times the amount of the solid to the above solid product to neutralize it until it is close to...

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Abstract

The invention relates to a method for preparing sulfonated coal, in particular to a method for preparing the sulfonated coal in a closed cycle. The method comprises the following steps of: filling dried raw material coal with particle diameter of 2.0-4.0 mm into a controlled-temperature stirring reaction device; adding sulfuric acid mixed solution according to a weight part ratio of acid to coal as (4-6):1; stirring and heating to 120-160 DEG C and reacting at a constant temperature for 9-11 hours; cooling and filtering to obtain filtrate and solid substances; washing the solid substances with a proper amount of distilled water; then adding into 10 percent NaOH solution and neutralizing to be close to neutral; and standing for 2-6 hours and then filtering to obtain filtrate and the sulfonated coal. In the method, concentrated sulfuric acid, diluted sulfuric acid obtained by introducing hot steam produced in the reaction device into a condenser, residual sulfuric acid obtained by filtering and cooling the reactant and the diluted sulfuric acid obtained by washing the solid substance with the distilled water are all used in the closed cycle through a sulfuric acid mixer without causing resource waste; and the hot steam produced in the reaction device is converted into diluted sulfuric acid through the condenser and is used in the closed cycle without producing environmental pollution.

Description

technical field [0001] The invention relates to a method for preparing sulfonated coal, in particular to a closed-loop method for preparing sulfonated coal. Background technique [0002] Sulfonated coal is a sulfonation reaction of concentrated sulfuric acid with bituminous coal and lignite, which introduces sulfonic acid groups (-SO3H) into the aromatic ring of the coal structure; at the same time, due to the oxidation of concentrated sulfuric acid, the alkyl group on the side chain of the aromatic ring is also Oxidized to carboxyl (-COOH) and hydroxyl (-OH), the hydrogen on these groups can be replaced by some metal ions. The appearance of sulfonated coal is black dull particles, the particle size is generally controlled at 2.0-4.0mm, and it has a loose structure. It is a strong acidic cation exchange adsorbent with multiple functional groups. Its chemical structure can be expressed as: [0003] [0004] Sulfonated coal has the characteristics of large specific surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01J39/16
Inventor 张建旺张立航
Owner 张建旺