CN85102191A - Microspheroidal gac and preparation method - Google Patents

Abstract

The invention belongs to special typed active carbon and preparing technical field thereof.

It is raw material that the present invention selects the bituminous coal that the source is wide, price is low for use, grinds 200 or 300 orders that sieve after washing or flotation.Get 100 parts of compounds of coal dust and mix for 20～50 parts and pinch, make ball, after the balling-up 100～200 ℃ of dryings 1～6 hour, charing 2～8 hours in the time of 400～700 ℃ under protective atmosphere then, again in the time of 800～1000 ℃ with steam activation 4～10 hours.When the present invention made ball in granulating disc or thermopnore tablets press, the particle size range by control amount of water, disc tilt angle, the degree of depth, grain speed, baffle plate angle and smooth finish may command microballoon was at 0.3～0.8mm.

Description

Microspheroidal gac and preparation method

The invention belongs to special typed active carbon and preparing technical field thereof

By bituminous coal system ball shape active carbon generally is to add behind the caking agents such as modified lignin that spent pulping liquor tar-bitumen, sulfonation crude anthracene, bird tropine handle in coal dust in the dish pelletizer of garden or balling-up in the thermopnore tablets press; particle diameter＞the 1mm of ball; be 3-7mm, make ball shape active carbon after drying, charing, the activation.This gac is owing to particle diameter is unsuitable for greatly using in fluidized-bed and moving-bed.

By petroleum pitch behind sulfur adding treatment, the fusion balling-up or with the organic polymer bead through the sulfuration after again through charing and the activation can make microsphere active carbon.This method complex process, raw material sources are extensive inadequately, and product cost is higher.

The present invention is intended to select feedstock production more cheap and easy to get to go out the microspheroidal gac of particle diameter less than 1mm.To make it being applicable to that thermopnore and moving-bed are made support of the catalyst and sorbent material is used.

It is raw material that the present invention selects the cheap bituminous coal of wide material sources for use, (is good with the few bituminous coal of ash content).Through washing or carrying out flotation, adopt proportion to be advisable in bituminous coal at the coal of 1.0-1.3.On ball mill, pulverize then and sieve 200 orders or 300 orders.Get 100 parts of above-mentioned coal dusts, compound 20-50 part is mixed and is pinched, and makes ball in garden dish tablets press or thermopnore tablets press.The angle of plate washer and the granularity that smooth finish is controlled microballoon in angle of inclination by control amount of water, garden dish, the degree of depth, rotating speed, the dish.After the balling-up 100-200 ℃ of drying, preferably 130-180 ℃ dry 1-6 hour down, then under protective atmosphere (as nitrogen, coal gas, combustion tail gas, water vapour), when temperature is 400-700 ℃ charing 2-8 hour.In the time of 800-1000 ℃, can make finished product after the charing with steam activation 4-10 hour.The tackiness agent that the present invention uses is coal tar, pitch and derivative thereof, modified lignin, hydroxy propyl cellulose, methylcellulose gum, polyvinyl alcohol etc.Coal tar wherein: pitch: Mierocrystalline cellulose=1-8: 1-5: 0.1-1.0.Its particle size range of microspheroidal gac that adopts the present invention's preparation is at 0.3-0.8mm, and median size 0.5mm, specific surface are 800-1300m ²/ g.The fluidization loss amount is 3%-6%.Adopt carrier (as acetylene and acetic acid synthesizing vinyl acetate) that the microspheroidal gac of the present invention's preparation can be used for fluid catalyst also applicable to making aspect such as sorbent material in the moving-bed.

Below two embodiment can further specify feature of the present invention.

It is standby that example 1. selects for use the bituminous coal of Weiyuan Coal Mine, Sichuan Prov. to cross 200 mesh sieves after washing, oven dry, pulverizing.Get 100 parts of coal dusts, 16 parts in coal tar, 4 parts of pitches, 0.5 part of modified-cellulose, 0.5 part of polyvinyl alcohol.Pinch mixed.Make ball in the dish tablets press of garden, bead 300-600 ℃ of following charing 10 hours, was used steam activation 6 hours at 100 ℃ dry 2 little down again.The microspheroidal gac that obtains can be as follows:

Size-grade distribution φ 1-0.74mm 0.7%

φ0.74-0.56mm 15.8%

φ0.56-0.45mm 75.2%

φ0.45-0.30mm 8.6%

φ＜0.3mm 0.4%

Specific surface 1027m ²/ g

Total pore volume 0.6175ml/g

The pore size distribution size (

) account for the percentage ratio of total pore volume

＞20 33.6

10-20 31.1

＜10 35.3

Iodine absorption 1043mg/g

Zinc acetate pickup 24.2%, 367 milligrams/gram of acetic acid steam absorption gac charcoal

Bulk density 0.52 grams per milliliter benzene absorption 33.8%

605 milligrams/gram of pH value 9.48 tetrachloro charcoals absorption gac

The fluidization loss amount ^*3.5%(is 200 hours a percentage loss amount of 0.19 meter per second fluidisation with microsphere active carbon 50 grams air linear speed in fluidized-bed of φ 0.4-0.6mm.Beijing brilliance factory produces the coconut husk granulated carbon, and the fluidization loss amount is 22.8%)

After example 2 is got Weiyuan Coal Mine, Sichuan Prov.'s bituminous coal proportion and is the flotation of 1.2g/ml liquor zinci chloridi.It is standby to pulverize 300 mesh sieves.Get coal dust and add 17 parts in coal tar for 100 parts.1 part of modified-cellulose, 3 parts of pitches.Pinch mixed back and in the dish tablets press of garden, make ball.Bead was 120 ℃ of dryings 3 hours.300-600 ℃ of following charing 8 hours, use steam activation 8 hours.The product performance that make are as follows:

Size-grade distribution 1.00-0.80mm 1.0%

0.80-0.63 2.7%

0.63-0.40 95.4%

0.40-0.30 0.5%

＜0.30 0.2%

1162 meters of specific surface areas ²/ gram

Bulk density 0.49 grams per milliliter

Total hole volume (0-44

) 0.8405 milliliter/gram

Pore distribution: size (

) pore volume milliliter/gram

＞20 41.5

10-20 50.1

＜10 9.2

1070.4 milligrams/gram of iodine absorption gac

Ash 6.8%

Fluidization loss amount 5.8%

PH 9.3

444 milligrams/gram of acetic acid steam absorption gac

Benzene absorption 44.4%

743 milligrams/gram of tetrachloro charcoal absorption gac

Claims (3)

1, a kind ofly add various additives after the ball shape active carbon of granulation, oven dry, charing, activation preparation in coal dust, the particle diameter that it is characterized in that activated carbon microballon is less than 1mm.

2, a kind of is that raw material adds various additives after granulation, oven dry, charing, activation prepare the microspheric process of active carbon and it is characterized in that with the coal dust

The proportioning of-coal dust and various compounds is 100: 20-50(is 100 parts in coal dust)

-by changing angle of inclination, the degree of depth, the angle of the interior plate washer of tachometer disk and the method for smooth finish control microballoon granularity that amount of water and garden Pan Zaolijiyuan coil.

-descended dry 1-6 hour at 100-200 ℃.

-charing 2-8 hour in the time of 400-700 ℃.

-in the time of 800-1000 ℃ with steam activation 4-10 hour,

3, it is characterized in that according to claim 2 described methods the various tackiness agents that added are coal tar, pitch and derivative thereof, modified lignin, hydroxy propyl cellulose, methylcellulose gum, polyvinyl alcohol, its proportioning is: coal tar: pitch: Mierocrystalline cellulose=1-8: 1-5: 0.1-1.0.