Method for directly preparing activated carbon in waste acid

An activated carbon, direct technology, applied in the field of comprehensive utilization of resources, can solve the problem of high cost, achieve the effect of low cost, excellent fertilizer retention, and improved air permeability

Active Publication Date: 2015-10-28
赵常然
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The decarbonization regeneration method of organic matter in waste sulfuric acid is to use solvent to extract organic matter or strong oxidant to oxidize, separate or transform the organic matter in waste acid, so that waste acid can be regenerated and reused. Although this technology is feasible, but because of higher cost, Large-scale industrial production has not yet formed

Method used

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  • Method for directly preparing activated carbon in waste acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Crush the peanut shells to 5 meshes to obtain 10g of peanut shell powder, and spray 20g of water for wetting;

[0038] (2) According to step (1) the weight ratio of peanut shell powder and sulfuric acid with a concentration of 98wt% is 1:20, the peanut shell powder obtained in step (1) is mixed with sulfuric acid with a concentration of 98wt%, and heated at 20°C The oscillation frequency is 50 times / min, and the oscillation reaction is carried out for 24 hours to obtain the reactant;

[0039] (3) The reactant obtained in step (2) is separated into solid and liquid to obtain a solid product and a filtrate, and the solid product is repeatedly washed with water until it is neutral and free of sulfate ions, and then dried by suction filtration to obtain activated carbon.

[0040] The filtrate is purified industrial sulfuric acid; the washing water produced by repeated washing is industrial dilute sulfuric acid, which can be used for acid absorption in sulfuric acid work...

Embodiment 2

[0043] (1) Crush the straw to 200 mesh to get 100g of straw powder;

[0044] (2) According to step (1) the weight ratio of rice straw powder and sulfuric acid with a concentration of 93wt% is 1:2, mix the rice straw powder obtained in step (1) with sulfuric acid, and stir once every hour at 22°C, react 36 hour, the reactants were obtained;

[0045] (3) The reactant obtained in step (2) is separated into solid and liquid to obtain a solid product and a filtrate, and the solid product is repeatedly washed with water until it is neutral and free of sulfate ions, and then dried by suction filtration to obtain activated carbon.

[0046] The filtrate is purified industrial sulfuric acid; the washing water produced by repeated washing is industrial dilute sulfuric acid, which can be used for acid absorption in sulfuric acid workshops in conventional production.

[0047] After testing, the water content of rice straw powder is 13.95%, the weight of activated carbon product is 352g, t...

Embodiment 3

[0049] (1) Crush the sawdust to 80 mesh to obtain 40g of sawdust powder; spray 100g of water on the obtained sawdust powder for wetting;

[0050] (2) According to step (1) the weight ratio of wood powder and alkylation waste sulfuric acid with a concentration of 92wt% is 1:100, mix the wood powder obtained in step (1) with alkylation waste sulfuric acid, and place in a microwave oven to 700W, 2450MHz (about 120°C) heating reaction for 15 minutes, take it out and stir it, then place it in a microwave oven and heat it for 15 minutes to obtain the reactant;

[0051] (3) The reactant obtained in step (2) was separated by suction filtration with a Buchner funnel to obtain a solid product and a filtrate, and the solid product was moved into an ultrasonic cleaning machine with a temperature of 80°C for 10 minutes until it was neutral and free of sulfate ions. And then dried by suction filtration to obtain activated carbon.

[0052] The filtrate is purified industrial sulfuric acid; ...

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Abstract

The invention discloses a method for directly preparing activated carbon in waste acid. The method comprises the following steps: biomass raw materials or organic matter raw materials are smashed, the smashed biomass raw materials or organic matter raw materials are mixed with an acid solution, reaction is carried out under a certain temperature, and solid-liquid separation is carried out, so that a solid product and a filtrate are obtained; the solid product is repeatedly washed with water until a neutral property is achieved and sulfate ions do not exist, and suction filtration and drying are carried out, so that the activated carbon is obtained, and the filtrate is purified industrial sulfuric acid. According to the invention, high temperature is not required, the obtained activated carbon is dust-free activated carbon, and the obtained flexible and elastic activated carbon with high water absorbability can be widely applied to the industries of purification, decolorization, adsorption, filtration aiding, carriers, a conditioner and the like. The method is extremely wide in raw material applicability, can be used for purifying waste sulfuric acid, and can purify industrial waste acid into industrial-grade sulfuric acid.

Description

technical field [0001] The invention relates to a method for directly preparing activated carbon from waste acid, belonging to the technical field of comprehensive utilization of resources. Background technique [0002] Activated carbon is made of high-quality coal, wood, biomass and various fruit shells as raw materials, and is processed and manufactured through a series of processes such as crushing, powder making, molding, carbonization, activation, and finished product treatment of raw materials through physical and chemical methods. An excellent adsorbent with developed internal pore structure and huge specific surface area, widely used in metallurgy, textile, national defense, environmental protection and daily life. Activated carbon can be divided into granular, powder, fibrous, etc. according to the shape; according to different raw materials, it can be divided into wood activated carbon, shell activated carbon, coal-based activated carbon and petroleum coke activate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 赵常然
Owner 赵常然
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