Method for preparing organics by strengthening electrolysis of coal slurry under alkaline system

A technology of organic matter and coal slurry, applied in the direction of electrolytic organic production, electrolytic process, electrolytic components, etc., can solve the problem of low organic matter output, achieve the effect of small investment, strong controllability, and mild operating conditions

Inactive Publication Date: 2012-10-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, organic chemicals can be obtained by oxidizing and degrading the organic structure of coal by controlling the appropriate coal slurry electrolysis conditions. However, the output of organic substances produced by coal slurry electrolysis and anodic oxidation is relatively small, generally 200-300mg / L

Method used

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  • Method for preparing organics by strengthening electrolysis of coal slurry under alkaline system
  • Method for preparing organics by strengthening electrolysis of coal slurry under alkaline system
  • Method for preparing organics by strengthening electrolysis of coal slurry under alkaline system

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The coal quality analysis of the coal sample is shown in Table 1. The coal was crushed to below 74 microns and dried. Prepare an effective area of ​​9cm with an iron plate 2 The square is coated with silica gel to ensure the insulation of other parts; and NaOH solution is prepared, and [BP y ] Br. Place the iron electrodes in the anode / cathode compartments of the square electrolytic cell respectively, add electrolyte, and add coal powder into the anode compartment to ensure that the concentration of coal slurry is 50g / L, [BP y ] The concentration of Br is 0.1mol / L, and the concentration of NaOH is 1mol / L. Use a constant voltage and constant current power supply to control the current at 1A, and conduct constant current electrolysis at 30°C for 6 hours. After the reaction, the total organic carbon concentration value of the primary filtrate is 1128mg / L.

Embodiment 2

[0056] The coal quality analysis of the coal sample is shown in Table 1. The coal was crushed to below 74 microns and dried. Draw the iron plate with an effective area of ​​9cm 2 The other parts were coated with silica gel, dried for later use, and NaOH solution was prepared, and then [OMim]Br was added. Place the iron electrodes in the cathode / anode compartments of the square electrolytic cell respectively, add electrolyte, and add coal powder into the anode compartment to ensure that the concentration of coal slurry is 40g / L, the concentration of [OMim]Br is 0.2mol / L, NaOH The concentration is 2mol / L, and the current is controlled by a constant voltage and constant current power supply at 1A, and the constant current is electrolyzed at 30°C for 6h. After the reaction, the total organic carbon concentration of the primary filtrate is 1210mg / L.

Embodiment 3

[0058] The coal quality analysis of the coal sample is shown in Table 1. The coal was crushed to below 74 microns and dried. Draw the iron plate with an effective area of ​​9cm 2 The other parts were coated with silica gel, dried for later use, and NaOH solution was prepared, and [BMim]Cl was added. Place the iron electrodes in the cathode / anode chambers of the square electrolytic cell respectively, add electrolyte, and add coal powder into the anode chamber to ensure that the concentration of coal slurry is 20g / L, the concentration of [BMim]Cl is 0.1mol / L, NaOH The concentration is 1mol / L, and the constant current is electrolyzed at 1A at 85°C for 6 hours with a constant voltage and constant current power supply. After the reaction, the total organic carbon concentration value of the primary filtrate is 1717mg / L.

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Abstract

The invention relates to a method for preparing organics by strengthening electrolysis, oxidation and degradation of coal slurry with strong oxidizing mediums generated by an anode in a water-electrolyzed hydrogen production process under an alkaline system, belonging to the field of high-value coal conversion technology. The method comprises the following steps: preparing the coal slurry with coals and alkaline liquid, and strengthening oxidation and degradation process of the coal slurry by adding catalysts and/or applying to external field to realize anode electrolysis and oxidation process of the coal slurry, and significantly increase electrolysis and oxidation efficiency of the coal slurry. The method has the advantages of high yield of organics, simple processes and controllable operation conditions.

Description

technical field [0001] The invention belongs to the technical field of high-value conversion of coal, and in particular relates to a method for preparing organic matter by using coal slurry electrolytic anodic oxidation reaction. Background technique [0002] Coal is a very important fossil resource as a power fuel, but converting it directly into chemicals is an inevitable way to achieve high-value utilization. At present, the industrialized coal conversion process often needs to be operated under high temperature and high pressure conditions, which requires high material performance of the equipment, and the target product often requires secondary synthesis, resulting in increased energy consumption. Therefore, direct conversion of coal to chemicals under milder conditions has significant economic value. [0003] Coal can be directly converted into organic chemicals by oxidative degradation of coal slurry. Studies have shown that humic acid, benzene polycarboxylic acid, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/02C25B3/23
Inventor 公旭中王志王明涌汪玉华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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