Method for preparing high-specific-surface-area activated carbon from blend coal of coke powder and/or quenched coke powder

A technology for preparing activated carbon and using coke powder, which is applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc. It can solve the problems of cumbersome post-treatment process, large amount of activator used, and low product quality. Achieve the effects of shortening production time, low ash content, and reducing environmental pollution

Inactive Publication Date: 2018-10-09
BEIJING RISUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of these methods are that the product yield is low and the cost is high; the alkali consumption in the process is large, easy to explode, and pollutes heavily.
[0006] To sum up, the use of coke powder and coke quenching powder to prepare activated carbon still has the problems of excessive use of activator, low product quality, cumbersome post-treatment process, and a large amount of three wastes.

Method used

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  • Method for preparing high-specific-surface-area activated carbon from blend coal of coke powder and/or quenched coke powder
  • Method for preparing high-specific-surface-area activated carbon from blend coal of coke powder and/or quenched coke powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare high specific surface area powdered activated carbon as follows:

[0038] (1) Coal blending: compound coke powder, lean coal and potassium hydroxide in a weight ratio of 2:1:1;

[0039] (2) Pulverization: pulverize the above-mentioned mixture to 120 mesh and 70% pass;

[0040] (3) Carbonization and activation: carbonize and activate the above pulverized mixture, the carbonization temperature is 550° C., and the carbonization time is 1 h. Subsequently, the temperature of the furnace was raised to 950° C., and activated for 1 h.

[0041] (4) Post-treatment: The carbonized and activated materials are washed with sulfuric acid and water until neutral, and then dried to obtain the product.

[0042] In addition, the activator-containing wastewater obtained after washing can be further treated to recycle potassium hydroxide. Potassium hydroxide can be recovered by subjecting activator-containing wastewater to evaporation, concentration, causticization, filtration an...

Embodiment 2

[0045] Prepare high specific surface area granular activated carbon according to the following steps:

[0046] (1) Coal blending: compound coke powder, low ash gas coal and potassium hydroxide in a weight ratio of 3:1:1;

[0047] (2) Pulverization: pulverize the above-mentioned mixture to 120 mesh and 70% pass;

[0048](3) Molding: transfer into the mixed powder and account for the tar of 3% of the gross weight of coke powder and low ash gas coal, the water of 5% and account for the dodecane of 0.05% of the gross weight of coke powder and low ash gas coal Sodium phenyl sulfonate, mixed uniformly and sent to the equipment to extrude;

[0049] (4) Drying: Dry the formed strips at 80°C to 90°C for 6 hours;

[0050] (5) Carbonization and activation: carbonize and activate the above pulverized mixture, the carbonization temperature is 600° C., and the carbonization time is 2.0 h. Subsequently, the furnace temperature was raised to 850° C., and activated for 1.2 h.

[0051] (6) ...

Embodiment 3

[0055] Prepare high specific surface area powdered activated carbon as follows:

[0056] (1) Coal blending: compound with coke quenching powder, lignin, sodium hydroxide and sodium carbonate in a weight ratio of 4:2:1:1;

[0057] (2) Pulverization: pulverize the above-mentioned mixture to 120 mesh and 70% pass;

[0058] (3) Carbonization and activation: carbonize and activate the above pulverized mixture, the carbonization temperature is 600° C., and the carbonization time is 2.0 h. Subsequently, the furnace temperature was raised to 850° C., and activated for 1.2 h.

[0059] (4) post-treatment: the material after being discharged from the oven is washed with dilute hydrochloric acid and water to neutrality in turn, and the product can be obtained after drying.

[0060] After testing, the activated carbon products produced by this process have a BET specific surface area greater than 1900m 2 / g, well-developed mesopores, and ash content below 1%.

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Abstract

The invention relates to utilization processes for coking by-products, i.e., coke powder and quenched coke powder, especially a method for preparing high-specific-surface-area activated carbon from blend coal of coke powder and / or quenched coke powder. The method comprises the following steps: (a) batching: compounding coke powder and / or quenched coke powder, other carbon-containing materials andan activator; (b) crushing: putting a mixture obtained in the step a) in a crusher for crushing to a powder form, wherein the desired particle size of the powder allows the powder to pass through 70%or more of mesh holes in a 120-mesh sieve; (c) carbonization and activation: subjecting a material obtained in the previous step to carbonization at 500 to 650 DEG C for 1 to 3 h, and then to activation at 750 to 950 DEG C for 0.5 to 4 h; and (d) post-treatment: subjecting the activated material to pickling and / or washing to remove ash and carrying out drying so as to obtain an active carbon product, wherein a weight ratio of the total weight of the coke powder and / or quenched coke powder and the other carbon-containing materials to the activator is 1: 1 to 6: 1, and a weight ratio of the cokepowder and / or quenched coke powder to the other carbon-containing materials is 1: 1 to 6: 1.

Description

technical field [0001] The invention relates to a utilization process of coking by-product coke powder and coke quenching powder, in particular to a method for preparing activated carbon with high specific surface area by blending coke powder and / or coke quenching powder with coal. Background technique [0002] Coke powder and coke quenching powder are inevitable by-products of coke, metallurgy and other production enterprises. Because the particle diameter is small, the utilization effect is poor, and it is difficult to find a reasonable use. And long-term, large quantities of coke powder and coke quenching powder piled in the open air will generate dust pollution and have a bad impact on the environment. Simply burning it as fuel is a waste of precious resources, which will easily cause the production cost of related enterprises to rise. [0003] It has been determined that the fixed carbon content of coke powder and coke quenching powder itself can reach 70-80%, and aft...

Claims

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Application Information

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IPC IPC(8): C01B32/348B01J20/20B01J20/28C02F1/28
CPCB01J20/20B01J20/28066C01P2006/12C01P2006/80C02F1/283
Inventor 张英伟张捷张新志孟祥孙艳锐殷州
Owner BEIJING RISUN TECH CO LTD
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