CN101306345A - Impregnated activated carbon and its preparation method - Google Patents

Abstract

The invention discloses an activated carbon, in particular to an impregnated activated carbon which is used for purifying low-concentration ammonia. The invention comprises the technical proposal that the activated carbon is impregnated and absorbed with two active materials of copper salt and inorganic acid. The preparation method thereof comprises the steps that the two active materials are used for preparing an impregnating solution according to the proportion, the equivalent or the excessive dipping method is adopted to uniformly adhere the impregnating solution on the activated carbon, and air which can control the oxygen quantity is used for carrying out drying and activating at the temperature of 70-180 DEG C, thereby obtaining the impregnated activated carbon. The impregnated activated carbon has the advantages that the adsorption capacity is strong, and the purification efficiency is high, especially to the low-concentration ppb ammonia, and is applicable to the deep purification of the low-concentration ammonia in the air of an air conditioning and ventilation system under normal temperature and pressure, a local environment, etc.

Description

A kind of Immesion active carbon and preparation method thereof

One, technical field

The invention discloses a kind of active carbon, particularly a kind of Immesion active carbon that is used for the purifying low-concentration ammonia belongs to active carbon purifying agent technical field.

Two, background technology

Active carbon is used to purify air and the existing long history of water, still adopts active carbon as adsorbent in the air cleaning equipment in a large number; In order to improve the adsorption capacity of active carbon, people often carry out impregnation process to active carbon, in the past, people generally adopt the active carbon or the common active carbon of impregnation of phosphoric acid to the processing of ammonia, but above-mentioned sorbing material to the ammonia decontamination ability of ppb level low concentration a little less than, purify not thoroughly, efficient is low, can not satisfy modern industry and health of people requirement.

Three, summary of the invention

Purpose of the present invention is intended to overcome the deficiency of above-mentioned prior art, discloses Immesion active carbon of a kind of efficient removal low concentration ammonia and preparation method thereof.

For achieving the above object, the technology that the present invention adopts is put case and is: a kind of Immesion active carbon, its special character is that dipping is adsorbed with mantoquita and two kinds of active materials of inorganic acid in active carbon, wherein, active carbon content is the 82.6-95.8% of Immesion active carbon weight, used active carbon is that column, spherical activated charcoal or its grain graininess of broken shaped activated carbon are φ 3-4mm, and granule strength is 80-95%, and water capacity is 40-80%, loading density is 450-550g/L, to carbon tetrachloride adsorption rate 50-80%; The content of mantoquita and inorganic acid is respectively the 3.6-12.8% and the 0.6-4.6% of Immesion active carbon weight.

Used mantoquita is any one or a few the combination in copper sulphate, copper nitrate and the copper chloride.

Used inorganic acid is any one or a few the combination in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid.

The method for preparing above-mentioned Immesion active carbon is prepared from according to following steps successively;

A, preparation maceration extract: load weighted mantoquita and inorganic acid solution in distilled water, are mixed with maceration extract under 40-80 ℃ temperature;

B, Immesion active carbon:, adopt the method for single-steeping or step impregnation to be impregnated on the active carbon equably with equivalent or excessive maceration extract with the water capacity of above-mentioned maceration extract according to active carbon;

C, health: the Immesion active carbon that will obtain after will flooding in air health 4-12 hour;

D, dry activation: the Immesion active carbon after the health is placed drying oven or fluid bed, and under the 70-180 ℃ of temperature and under the condition of control oxygen atmosphere, the employing program heats up slowly that substep is dry, activation 4-8 hour, promptly makes the Immesion active carbon finished product.

More than the pH value of Pei Zhi maceration extract is 1-5.

The good effect that compared with the prior art the present invention has is, high adsorption capacity, the purification efficiency height, especially the ammonia decontamination ability to ppb level low concentration is stronger, purify thoroughly, can be used under the normal temperature and pressure deep purifying of low concentration ammonia in the air such as air conditioner ventilating system, local environment, environmental protection, the healthy space of work and life is provided.

Four, the specific embodiment

For understanding the present invention better, it is done further detailed elaboration below in conjunction with the specific embodiment.

Embodiment 1: take by weighing 2kg copper sulphate and 0.5kg sulfuric acid, put into distilled water, 40-80 ℃ maceration extract is made in dissolving; Press the liquor capacity of active carbon water capacity 40-80%, the maceration extract single-steeping of using equivalent is to the 20kg active carbon; Health is 6 hours in air; In 85 ℃, 135 ℃, 160 ℃ temperature, carry out temperature programming and dry, activate 5 hours step by step, make Immesion active carbon charcoal A.

Embodiment 2: take by weighing 1.5kg copper nitrate, 1.5kg copper chloride and 1kg nitric acid, put into distilled water, 40-80 ℃ maceration extract is made in dissolving; Press the liquor capacity of active carbon water capacity 40-80%, divide with excessive maceration extract to be impregnated into for four times on the 20kg active carbon; Health was removed redundant solution after 4 hours in air; In 70 ℃, 120 ℃, 150 ℃ temperature, carry out temperature programming and dry, activate 5 hours step by step, make Immesion active carbon B.

Embodiment 3: take by weighing 1.2kg copper sulphate, 0.5kg phosphoric acid and 0.3kg sulfuric acid, put into distilled water, 40-80 ℃ maceration extract is made in dissolving; Press the liquor capacity of active carbon water capacity 40-80%, the maceration extract single-steeping of using equivalent is to the 20kg active carbon; Health is 6 hours in air; In 85 ℃, 135 ℃, 160 ℃ temperature, carry out temperature programming and dry, activate 5 hours step by step, make Immesion active carbon C.

Above-mentioned Immesion active carbon A, the B that manufactures, C and the common active carbon E that sells the active carbon D of impregnation of phosphoric acid on the market and do not carry out impregnation process are respectively charged into air cleaner, and at 30m ³Feed a certain amount of ammonia, airtight sealed compartment in the sealed compartment.Adopt " ammonia assay method indophenol blue AAS in the public place air " (GB/T 18204.25-2000) sampling to carry out the analysis of ammonia concentration.Open air cleaner then, restart after 1 hour to sample and carry out the analysis of ammonia concentration, calculate adsorption cleaning efficient, the results are shown in table 1.

Table 1: ammonia decontamination efficient

Adsorbent Ammonia concentration before purifying Purify the back ammonia concentration Purification efficiency ??A ??1724ppb ??45ppb ??97.4％ ??B ??1560ppb ??59ppb ??96.2％ ??C ??1438ppb ??27ppb ??98.1％ ??D ??1635ppb ??191ppb ??88.3％ ??E ??1487ppb ??510ppb ??65.7％

From table 1, can obviously find out, Immesion active carbon high adsorption capacity of the present invention, the purification efficiency height can carry out deep purifying to ppb level low concentration ammonia effectively, and is satisfactory for result.

Claims (5)

1, a kind of Immesion active carbon, it is characterized in that: dipping is adsorbed with mantoquita and two kinds of active materials of inorganic acid in active carbon, wherein, active carbon content is the 82.6-95.8% of Immesion active carbon weight, used active carbon is that column, spherical activated charcoal or its grain graininess of broken shaped activated carbon are φ 3-4mm, and granule strength is 80-95%, and water capacity is 40-80%, loading density is 450-550g/L, to carbon tetrachloride adsorption rate 50-80%; The content of mantoquita and inorganic acid is respectively the 3.6-12.8% and the 0.6-4.6% of Immesion active carbon weight.

2, Immesion active carbon according to claim 1 is characterized in that: mantoquita is any one or a few the combination in copper sulphate, copper nitrate and the copper chloride.

3, Immesion active carbon according to claim 1 is characterized in that: inorganic acid is any one or a few the combination in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid.

4, a kind of method for preparing Immesion active carbon as claimed in claim 1 is characterized in that: be prepared from according to following steps successively;

A, preparation maceration extract: load weighted mantoquita and inorganic acid solution in distilled water, are mixed with maceration extract under 40-80 ℃ temperature;

B, Immesion active carbon:, adopt the method for single-steeping or step impregnation to be impregnated on the active carbon equably with equivalent or excessive maceration extract with the water capacity of above-mentioned maceration extract according to active carbon;

C, health: the Immesion active carbon that will obtain after will flooding in air health 4-12 hour;

D, dry activation: the Immesion active carbon after the health is placed drying oven or fluid bed, and under the 70-180 ℃ of temperature and under the condition of control oxygen atmosphere, the employing program heats up slowly that substep is dry, activation 4-8 hour, promptly makes the Immesion active carbon finished product.

5, the preparation method of Immesion active carbon according to claim 4 is characterized in that: the pH value of the maceration extract of preparation is 1-5.