CN101890336B - Activated alumina and activated carbon compounded material and preparation method thereof - Google Patents
Activated alumina and activated carbon compounded material and preparation method thereof Download PDFInfo
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- CN101890336B CN101890336B CN2010102670743A CN201010267074A CN101890336B CN 101890336 B CN101890336 B CN 101890336B CN 2010102670743 A CN2010102670743 A CN 2010102670743A CN 201010267074 A CN201010267074 A CN 201010267074A CN 101890336 B CN101890336 B CN 101890336B
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Abstract
The invention provides an activated alumina and activated carbon compounded material and a preparation method thereof. According to a formula, the material comprises the following raw materials in percentage by mass: 40 to 99 percent of aluminum hydroxide, 1 to 60 percent of activated carbon, and 15 to 35 percent of binder. The material is prepared by uniformly mixing, pelleting, ageing, molding, airing, sintering, rinsing, drying and the like. The invention aims to compound the activated carbon with the activated alumina; on the one hand, the material with a certain shape can be processed, the defects of loose shape, low strength, difficult recovery and the like of the activated carbon are overcome, and the material is easy to recycle; and on the other hand, the adsorption property of the activated alumina material is greatly improved. The method has the advantages of simpleness, practicality, readily available raw materials, low cost and suitability for industrial mass production, and can be widely applied to various fields such as industry, agriculture, environmental protection, air purification, water treatment and the like.
Description
Technical field
The invention belongs to a kind of new function material and field of compound material, be specifically related to a kind of activated alumina composite activated carbon preparation methods.
Background technology
Active carbon has been widely used in separation as the flourishing carbonaceous material of a kind of hole, and is refining, catalyst, and reagent reclaims and other, particularly just is being widely used aspect the public hazards improvement.But Along with people's is to the demand of active carbon, the improving constantly of quality requirement, and active carbon also shows many shortcomings; For example intensity is low, and product is a powdery, granular mostly, and service life is short; The reclaiming cost of use is high, has seriously restricted the development of active carbon, becomes the focus of industry.
Along with the development of chemical industry, many new requirements have been proposed again the catalyst carrier alumina in the process.For example, the hydrodesulfurization of residual oil and demetalization require moderate surface area and a certain proportion of macropore and little pore size distribution; Hydrodenitrogenation catalyst then require can uniform load high tenor high-specific surface area, macropore volume and proper proportion in, small structure etc.
Summary of the invention
The purpose of this invention is to provide a kind of activated alumina composite activated carbon material and preparation method thereof; It closely combines active carbon and two kinds of materials of activated alumina through specific method; Giving full play to them separately on the basis of good characteristic; Can be made into various existing specific functions the multifunctional material of environmental purification function is arranged again; Can be widely used in the numerous areas of industry, agricultural, daily life, this has expanded active carbon and activated alumina material industry development field, has very great economy and social effect.
Activated alumina composite activated carbon material of the present invention, it is characterized in that: described raw material is: according to mass fraction: aluminium hydroxide 40～99%; Active carbon 1～60%; Binding agent 15～35%.
It is raw material that the present invention adopts aluminium glue and active carbon, through mix, granulation, old, moulding, dry, sintering, rinsing, drying steps prepare a kind of activated alumina composite activated carbon material.
Benefit of the present invention and superiority are: the present invention is a raw material with commercially available active carbon; Utilize the formability of alumine hydroxide colloid, active carbon firmly and equably is fixed among the activated alumina, realize the perfect adaptation of active carbon and activated alumina through sintering; Shortcomings such as active carbon intensity is low, service life short, recovery difficulty have been solved; Adaptable across the purified treatment of catalyst, catalyst carrier and water and air, and can be processed into certain shape, be easy to regeneration and use; The preparation method is simple, and raw material is easy to get, and is with low cost, is fit to large-scale industrial production.
Description of drawings
Fig. 1 is a performance of products test data among the embodiment 1.
The specific embodiment
According to mass fraction: aluminium hydroxide 40～99%; Active carbon 1～60%; Binding agent 15～35%.
Described aluminium hydroxide is less than 100 order powders.
Described active carbon is commercially available active carbon powder.
Described binding agent is HNO
3, HCl or H
2SO
4In a kind of.
Concrete preparation process is:
(1) mix: with aluminium hydroxide and active carbon powder by mixing in the input batch mixer after the proportioning weighing.
(2) granulation: add the aqueous solution of an amount of binding agent according to the requirement of moulding process, continue mixing and stirring, obtain powder.
(3) old: as the powder after the granulation to be placed on the sealing of shady and cool place to preserve more than one day.
(4) moulding: be pressed into shapes such as sheet, column with hydraulic press, or directly process spherical (3～10mm).
(5) dry: the sample for preparing is placed under the room temperature dries.
(6) sintering: the sample after will drying is imbedded in the atmosphere protection sand for preparing in advance; Put into kiln; (heating rate with 100 ~ 400 ℃/h rises to 400～650 ℃, carries out sintering processes under the temperature retention time 2～6h) in reduction protection atmosphere and suitable heat-treat condition.
(7) rinsing is with dry: the material behind the sintering is fully washed the back oven dry with distilled water, get final product described activated alumina composite activated carbon material.
The atmosphere protection that uses in the said sintering step uses sand to be: even with any raw material in graphite, charcoal, coal or the coke and dry river sand in 1: 1 ratio ground and mixed, be prepared from behind 20 mesh sieves excessively.
The mass concentration of binder solution is 10～50% in the said granulation step.
Below in conjunction with specific embodiment content of the present invention is specified, but the present invention is not limited only to this:
Embodiment 1:
Utilize aluminium hydroxide and commercially available activated coco nut charcoal following for its composition of raw materials of feedstock production activated alumina composite activated carbon material: 100 purpose aluminium hydroxide powders, 650 grams (65%), activated coco nut charcoal powder 350 grams (35%) are with HNO
3Be binding agent:
Preparation process:
(1) mixing: aluminium hydroxide and cocoanut active charcoal powder by dropping in the batch mixer after the proportioning weighing, were mixed 1 hour.
(2) granulation: the powder behind the mixing is put into comminutor, progressively spray into rare HNO of 13wt%
3Solution 350 grams carry out granulation.
(3) old: as the powder after the granulation to be placed on the sealing of shady and cool place after with plastic bag sealing to deposit 24 hours.
(4) moulding: process 3～10mm spherical particle.
(5) dry: the particle of forming is placed on indoor drying.
(6) sintering: the particle after will drying is imbedded husky (graphite: river sand is 1: the 1) landfill of the atmosphere protection for preparing in advance, and put into kiln and carry out sintering, heating rate: the heating rate with 200 ℃/h rises to 450 ℃, temperature retention time 2h.
(7) rinsing is with dry: the particle behind the sintering is taken out, fully washs the back oven dry with distilled water, get final product described activated alumina composite activated carbon material.
Accompanying drawing 1 is seen in the properties of product test
Embodiment 2:
Utilize aluminium hydroxide and commercially available activated coco nut charcoal following for its composition of raw materials of feedstock production activated alumina composite activated carbon material: 100 purpose aluminium hydroxide powders, 850 grams (85%), activated coco nut charcoal powder 150 grams (15%) are with the HNO of 13wt%
3Be binding agent:
Preparation process:
(1) mixing: aluminium hydroxide and cocoanut active charcoal powder by dropping in the batch mixer after the proportioning weighing, were mixed 1 hour.
(2) granulation: the powder behind the mixing is put into comminutor, progressively spray into rare HNO of 13wt%
3Solution 320 grams carry out granulation.
(3) old: as the powder after the granulation to be placed on the sealing of shady and cool place after with plastic bag sealing to deposit 24 hours.
(4) moulding: process 3～10mm spherical particle.
(5) dry: the particle of forming is placed on indoor drying.
(6) sintering: the particle after will drying is imbedded husky (graphite: river sand is 1: the 1) landfill of the atmosphere protection for preparing in advance, and put into kiln and carry out sintering, heating rate: the heating rate with 200 ℃/h rises to 550 ℃, temperature retention time 4h.
(7) rinsing is with dry: the particle behind the sintering is taken out, fully washs the back oven dry with distilled water, get final product described activated alumina composite activated carbon material.
Performance test: iodine sorption value is 288.62 mg/g, particle mean intensity 35.16N.
Embodiment 3:
Utilize aluminium hydroxide and commercially available activated coco nut charcoal following for its composition of raw materials of feedstock production activated alumina composite activated carbon material: 100 purpose aluminium hydroxide powders, 700 grams (70%), activated coco nut charcoal powder 300 grams (30%) are with the HNO of 13wt%
3Be binding agent:
Preparation process:
(1) mixing: aluminium hydroxide and cocoanut active charcoal powder by dropping in the batch mixer after the proportioning weighing, were mixed 1 hour.
(2) granulation: the powder behind the mixing is put into comminutor, progressively spray into rare HNO of 13wt%
3Solution 410 grams carry out granulation.
(3) old: as the powder after the granulation to be placed on the sealing of shady and cool place after with plastic bag sealing to deposit 24 hours.
(4) moulding: process 3～10mm spherical particle.
(5) dry: the particle of forming is placed on indoor drying.
(6) sintering: the particle after will drying is imbedded husky (graphite: river sand is 1: the 1) landfill of the atmosphere protection for preparing in advance, and put into kiln and carry out sintering, heating rate: the heating rate with 200 ℃/h rises to 550 ℃, temperature retention time 4h.
(7) rinsing is with dry: the particle behind the sintering is taken out, fully washs the back oven dry with distilled water, get final product described activated alumina composite activated carbon material.
Performance: iodine sorption value is 505.81 mg/g, particle mean intensity 24.31N.
Claims (1)
1. activated alumina composite activated carbon material, it is characterized in that: raw material is calculated as according to mass percent: aluminium hydroxide 40～99%; Active carbon 1～60%; Binding agent 15～35%, the mass percent sum of each raw material components is 100%;
Described aluminium hydroxide is homemade or directly adopts commercially available commodity;
Described active carbon is commercially available active carbon powder;
Described binding agent agent is HNO
3, HCl or H
2SO
4In any;
Activated alumina composite activated carbon preparation methods is: adopting aluminium hydroxide and active carbon is primary raw material, through mix, granulation, old, moulding, dry, sintering, rinsing, drying steps be prepared from, specifically preparation process is:
(1) mixes: aluminium hydroxide and active carbon are pressed certain proportioning weighing, drop into stirring and evenly mixing in the batch mixer;
(2) granulation: add the aqueous solution of an amount of binding agent according to the requirement of moulding process, continue mixing and stirring, obtain powder; The mass concentration of the aqueous solution of said binding agent is 10～50%;
(3) old: that the powder after the granulation is placed on shady and cool place sealing 24 to 36 hours;
(4) moulding: be pressed into sheet, columnar shape with hydraulic press, or directly to process diameter be that 3～10mm is coccoid;
(5) dry: the sample for preparing is placed under the room temperature dries;
(6) sintering: the sample after will drying is imbedded in the atmosphere protection sand for preparing in advance; Put into kiln; In reduction protection atmosphere and suitable heat-treat condition, promptly the heating rate with 100 ~ 400 ℃/h rises to 400～650 ℃, carries out sintering processes under temperature retention time 2～6h; Said atmosphere protection sand is: even with any raw material in graphite, charcoal, coal or the coke and dry river sand in 1: 1 ratio ground and mixed, be prepared from behind 20 mesh sieves excessively;
(7) rinsing is with dry: the material behind the sintering is fully washed the back oven dry with distilled water, get final product described activated alumina composite activated carbon material.
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