CN102327783A - Method for preparing denitration catalyst carrier TiO2-WO3 composite powder - Google Patents
Method for preparing denitration catalyst carrier TiO2-WO3 composite powder Download PDFInfo
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- CN102327783A CN102327783A CN201110201646A CN201110201646A CN102327783A CN 102327783 A CN102327783 A CN 102327783A CN 201110201646 A CN201110201646 A CN 201110201646A CN 201110201646 A CN201110201646 A CN 201110201646A CN 102327783 A CN102327783 A CN 102327783A
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Abstract
The invention discloses a method for preparing denitration catalyst carrier TiO2-WO3 composite powder, which comprises the following steps of: pulping and dispersing a metatitanic acid raw material; adjusting until the concentration of the slurry, calculated in terms of the titanium dioxide TiO2, is 15-25% by mass; adding ammonium paratungstate to the slurry according to a proportion, wherein calculated by the mass of tungsten trioxide WO3, the additive proportion of the ammonium paratungstate is 4.0%-10.0% of the sum of the TiO2 and the WO3; adding ammonia water to the slurry to adjust the pH to 6.5-9.0; filtering and dewatering to obtain a blocky filter cake; crushing the filter cake mechanically; drying and roasting the crushed filter cake at 200 DEG C to 580 DEG C for 6 hours; and crushing the roasted material falling in the kiln to obtain a TiO2-WO3 composite powder product serving as the denitration catalyst carrier. The method disclosed by the invention is low in manufacturing cost and simple in process; and the prepared product has the advantages of high specific surface area, high surface chemical activity, high catalytic efficiency and good processability.
Description
Technical field
The present invention relates to the chemical products preparing technical field, concrete, relate to a kind of preparation denitration catalyst agent carrier TiO
2-WO
3The method of composite powder.
Background technology
The high-temp combustion emission gases---contain a large amount of NOx (nitrogen oxide) in the flue gas, nitrogen oxide is one of main atmosphere pollution.With nitric oxide and nitrogen dioxide is that master's nitrogen oxide is a major reason that forms photochemical fog and acid rain; Simultaneously nitrogen oxide also is a kind of important greenhouse gases, and its influence that causes greenhouse effects is that tens times of carbon dioxide are to hundred times under the equal number.Therefore, the denitration of flue gas improvement is the extremely important of environmental protection and very urgent task.SCR (SCR) gas denitrifying technology is the effective technology of the solution Pollution Index in Air Nitric Oxides that generally adopts in the world at present.Under the effect of catalyst; Through reducing agents such as ammonia, urea; Nitrous oxides selectivity harmful in the flue gas is catalysed and reduced into clean harmless nitrogen G&W; Realize qualified discharge, its denitration efficiency (removal of nitrogen oxide rate) can reach more than 90%, and denitrating catalyst is the key and the core of implementing this technology.
Denitrating catalyst mainly adopts nano titanium oxide etc. as active carrier, be major catalyst with the vanadic anhydride with tungstic acid and titanium dioxide be co-catalyst as the catalytic activity composition, through ammonia nitrogen oxide is reduced into the nitrogen G&W.Titanium dioxide-tungstic acid composite powder material is owing to titanium dioxide and tungstic acid is compound; The structure and the surface nature of carrier have been changed; Also make tungstic acid more even distribution in carrier, improved the processing characteristics of carrier, be beneficial to batch mixing in the Preparation of Catalyst, extrude, process such as drying; Guaranteed the Preparation of Catalyst high rate of finished products, so the preparation of carrier is the emphasis of denitrating catalyst technology.
Publication number is CN1724149; The Chinese patent document that open day is on January 25th, 2006 discloses the preparation method of the low temperature multicomponent catalyst in a kind of denitrating flue gas; Employing titanium dioxide is carrier; Oxide with manganese is an active component, adds variable valency metal iron, copper, vanadium etc. and makes a kind of low-temperature denitration catalyst product.This invention is a technological core with the activity of such catalysts component mainly, does not relate to the technology of preparing of catalyst carrier titanium dioxide product.Publication number is CN1451475; Open day be that the Chinese patent document on October 29th, 2003 discloses and a kind ofly does the preparation of carried catalyst with titanium dioxide, this invention is addressed catalyst titanium dioxide and is characterised in that: the crystallite particle diameter of 1) Detitanium-ore-type crystallization (101) face is 8～22nm scope; 2) contain the sulfate radical of 0.3～5.0wt%.Said proterties depends primarily on the chemical constituent and the calcining heat condition of preparation raw material, does not relate to the technology of preparing that improves titanium dioxide application performance on catalyst.
ZL200810045530.2 discloses the preparation method of several kinds of denitrating catalysts.This method is to be raw material with the metatitanic acid, and slurry is added some additives, carry out a series of processing after, 300 ℃ ~ 530 ℃ calcinings 5 hours, pulverize the back and obtain the titania powder product.This method technology is complicated, and the adding additive component is more, and cost also compares higher.
Japan Patent JP59035026, JP54082392, JP55008846, JP02241543 disclose the technology of preparing of several kinds of denitrating catalysts; And the preparation method of titanium dioxide raw material; Specific as follows: as to get a certain amount of metatitanic acid;, after 20 hours the material of drying was calcined 5 hours down at 509 ℃ 110 ℃ of dryings, pulverized the back and obtain the titania powder product.This method is not carried out modification to metatitanic acid and is handled; Through control to the metatitanic acid calcining heat; Control the titanium dioxide product of certain grain size, can not obtain high performance titanium dioxide product, and this method does not relate to the preparation of titanium dioxide and tungstic acid composite granule.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method for preparing denitration catalyst agent carrier TiO2-WO3 composite powder; The inventive method low cost of manufacture, technology are simple; The product for preparing has the specific area height, chemical mobility of the surface is high, the advantage of catalytic efficiency height and good processability.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of method for preparing denitration catalyst agent carrier TiO2-WO3 composite powder comprises the steps:
1) the raw material metatitanic acid disperses through making beating, is adjusted to titanium dioxide TiO
2The mass fraction of meter is 15 ~ 25% concentration of slurry;
2) ratio in 4.0% ~ 10.0% adds ammonium paratungstate in slurries, and said ratio is calculated with respect to titanium dioxide and tungstic acid sum with tungstic acid; Be quality/(quality of the quality+tungstic acid of titanium dioxide)=4.0% ~ 10.0% of tungstic acid, for example tungstic acid can be 4:96,5:95,10:90 etc. with the ratio of titanium dioxide;
3) to through step 2) handle in the resulting slurries in back and add ammoniacal liquor, adjust pH value to 6.5 ~ 9.0; Can improve the calcining performance with the compound and metatitanic acid of tungstic acid, obtain an amount of acid position characteristic; Be that the pH value is controlled at 6.5 ~ 9.0 and can guarantees that finished product keeps a certain amount of hydroxyl, thereby have an amount of L acid and B acid;
The dope filtration dehydration that 4) will after step 3) is handled, obtain at block filter cake, and making block filter cake titanium dioxide mass fraction is 40%～55%;
5) with resultant block filter cake Mechanical Crushing behind the step 4) filtering means dehydration, the filter cake after the fragmentation was 200 ℃～350 ℃ dryings 2.5 hours, and the filter cake after the oven dry was 350 ℃～580 ℃ calcinings 3.5 hours.
6) calcining falls the kiln material after crushed, promptly makes denitration catalyst agent carrier TiO
2-WO
3Composite powder.
The further technical scheme of the present invention is: described raw material metatitanic acid is the hydrated titanium dioxide that contains 5%～9% sulfuric acid.
The further technical scheme of the present invention is: described raw material metatitanic acid is to be obtained after concentrated, hydrolysis, washing and bleaching by intermediate product titanyl sulfate in the sulfate process titanium dioxide production.
The further technical scheme of the present invention is: WO in the ammonium paratungstate said step 2)
3Content is 88% ~ 91%.
The further technical scheme of the present invention is: said step 2), ammonium paratungstate joins in the slurries with the form of pressed powder.
The further technical scheme of the present invention is: raw material metatitanic acid making beating dispersion is to adopt resistivity greater than 1.0 * 10 in the said step 1)
6The deionized water of Ω .cm or pure water.
The further technical scheme of the present invention is: the ammoniacal liquor in the said step 3) prepares through following method: for ammonia, it is 23%～30% concentrated ammonia liquor that ammonia is fed the concentration for preparing in the pure water to liquefied ammonia through decompression.
The further technical scheme of the present invention is: the ammoniacal liquor in the said step 3) is to reach the commercial ammoniacal liquor of analyzing pure standard.
The further technical scheme of the present invention is: the filter cake described in the said step 5) specifically is meant 350 ℃～580 ℃ calcinings 3.5 hours: 0.8 hour, 400 ℃～580 ℃ calcinings of 350 ℃～400 ℃ calcinings 2.7 hours.
The present invention's technical scheme further is: the kiln material that falls of the calcining described in the said step 6) adopts shearing pulverizer to pulverize.
In sum, the present invention compared with prior art has following advantage:
1,, adopt the present invention can not bring impurity into to final products because the present invention has the advantage that low cost of manufacture, technology are simple, the product specific area is high, chemical mobility of the surface is high; Simultaneously, the present invention and existing publication number are that the Chinese patent document of CN1724149 and CN1451475 is compared, and are different from above-mentioned two pieces of technical schemes fully and have adopted new preparation method, make the present invention have higher novelty; Compared to ZL200810045530.2, process route is simplified more, and cost is also cheaper, and properties of product are more efficient, steady quality; In addition; The present invention compares with existing Japan Patent JP59035026, JP54082392, JP55008846, JP02241543: technology of the present invention is through having carried out the modification processing to metatitanic acid; Add ammonium paratungstate with appropriate method subsequently, cooperate suitable calcination condition, guarantee to form between Ti-O-W the bridge-type complex; The titanium dioxide product performance that obtains better, i.e. high, high, the good processability of chemical mobility of the surface of product specific area.
2, the raw material metatitanic acid of the present invention's employing is an intermediate product during sulfate process titanium dioxide is produced, and is not only cheap, and conveniently is easy to get, and production cost is further reduced; Adopt the deionized water beating results good; The branch time period different temperatures calcining manners of filter cake help further forming have high-specific surface area, particle diameter is little, epigranular, good dispersion are beneficial to processing titanium dioxide product.
3, the present invention is directed to and contain a large amount of sulfuric acid in the metatitanic acid; Because " bridge formation " of sulfuric acid effect; Make that the viscosity of metatitanic acid is big, in the processing of low temperature drying and calcining, harden easily, reduced physics, the chemical index such as specific area and chemical mobility of the surface of calcining back titanium dioxide product.Therefore; The present invention carries out modification processing as additive to metatitanic acid through adding ammoniacal liquor and pure water/deionized water; Through handling the viscosity can greatly reduce metatitanic acid, improve the calcining performance of metatitanic acid, can obtain to loosen, many micropores, the calcined product of an amount of L acid and B acid position arranged; The specific area of final products is high, and chemism is high, good processability; Through measuring, the acid position of final products is equivalent to contain the sulfate radical SO of 1.0%～4.0% (in mass fraction)
4 2-The technology of this invention processing metatitanic acid is simple, cost is lower: ammonium paratungstate has in the metatitanic acid slurry of higher concentration after joining improvement with pressed powder, because the interaction between Ti-O-W only needs stirring a little can make whole slurry even; The ammonium paratungstate that adds is transformed into Sulfated TiO after calcining
2-WO
3Composite not only makes the catalytic efficiency of final products improve a lot, but also can from spent catalyst, recycle.
4, select for use cut mode to pulverize the kiln material, can make that the final products granularity is thinner, particle size distribution is narrower, and the number cells of product is more, porosity is high, the good processability of product.
The specific embodiment
Below in conjunction with embodiment, the present invention is done further detailed description, but embodiment of the present invention is not limited thereto.
Embodiment 1
Preparation ammoniacal liquor: liquefied ammonia is ammonia through decompression, ammonia is fed prepare concentrated ammonia liquor in the pure water, and is subsequent use.
Take by weighing the 10Kg metatitanic acid and (press TiO
2Meter), joins in the reactor of band agitating device, add a certain amount of deionized water, adjustment concentration of slurry 15～25wt%; After stirring, in slurry, add ammonium paratungstate (APT), tungstic acid with respect to titanium dioxide and tungstic acid weight and ratio be 5wt%; In slurry, add ammoniacal liquor adjustment pH value to 8.5; Filter through fully stirring the back, filtering the gained filtrate is block metatitanic acid; With the filter cake that obtains after the block metatitanic acid Mechanical Crushing 200 ℃～350 ℃ dryings 2.5 hours; Filter cake after the oven dry was 0.8 hour, 400 ℃～580 ℃ calcinings of 350 ℃～400 ℃ calcinings 2.7 hours; The calcining that calcining the is obtained kiln material that falls is pulverized with shearing pulverizer, is prepared into pulverous titanium dioxide-tungstic acid composite granule product.
Present embodiment, described raw material metatitanic acid are meant the water and the titanium dioxide that contain 5%～9% (in mass fraction) sulfuric acid that the intermediate product titanyl sulfate obtains in the sulfate process titanium dioxide production after concentrated, hydrolysis, washing and bleaching.Form with pressed powder during ammonium paratungstate joins in the slurries, and WO in the ammonium paratungstate that is added
3Content is 88% ~ 91%.
The technology that the present invention handles metatitanic acid is simple, cost is lower.The final products that present embodiment acquired are as the TiO of catalyst carrier
2-WO
3The specific area of composite powder is high, and chemism is high, good processability; And catalytic efficiency also improves a lot.
Embodiment 2
Take by weighing the 10Kg metatitanic acid and (press TiO
2Meter), joins in the reactor of band agitating device, add a certain amount of pure water, adjustment concentration of slurry 15～20wt%; After stirring, in slurry, add ammonium paratungstate (APT), tungstic acid with respect to titanium dioxide and tungstic acid weight and ratio be 4wt%; In slurry, add analytically pure commercial ammoniacal liquor adjustment pH value to 6.5～7.5; Filter through fully stirring the back, filtering the gained filter cake is block metatitanic acid; 200 ℃～350 ℃ dryings after 2.5 hours, the filter cake after the oven dry was 0.8 hour, 400 ℃～580 ℃ calcinings of 350 ℃～400 ℃ calcinings 2.7 hours with the filter cake that obtains after the block metatitanic acid Mechanical Crushing; The calcining that calcining the is obtained kiln material that falls is pulverized with shearing pulverizer, is prepared into pulverous titanium dioxide-tungstic acid composite granule product.
Present embodiment, described raw material metatitanic acid are meant water that contains 5%～9% sulfuric acid and the titanium dioxide that the intermediate product titanyl sulfate obtains in the sulfate process titanium dioxide production after concentrated, hydrolysis, washing and bleaching.Form with pressed powder during ammonium paratungstate joins in the slurries, and WO in the ammonium paratungstate that is added
3Content is 88% ~ 91%.
Embodiment 3
Preparation ammoniacal liquor: liquefied ammonia is ammonia through decompression, ammonia is fed prepare concentrated ammonia liquor in the pure water, and is subsequent use.
Take by weighing the 10Kg metatitanic acid and (press TiO
2Meter), joins in the reactor of band agitating device, add a certain amount of deionized water, adjustment concentration of slurry 20～25wt%; After stirring, in slurry, add ammonium paratungstate (APT), tungstic acid with respect to titanium dioxide and tungstic acid weight and ratio be 5.0wt%; In slurry, add ammoniacal liquor adjustment pH value to 8.0～9.0; Filter through fully stirring the back, filtering the gained filtrate is block metatitanic acid; 200 ℃～350 ℃ dryings 2.5 hours, dried filter cake was calcined in calciner with the filter cake that obtains after the block metatitanic acid Mechanical Crushing, comprised 0.8 hour, 400 ℃～580 ℃ calcinings of 350 ℃～400 ℃ calcinings 2.7 hours; The calcining that calcining the is obtained kiln material that falls is pulverized with shearing pulverizer, is prepared into pulverous titanium dioxide-tungstic acid composite granule product.
Present embodiment, described raw material metatitanic acid are meant water that contains 5%～9% sulfuric acid and the titanium dioxide that the intermediate product titanyl sulfate obtains in the sulfate process titanium dioxide production after concentrated, hydrolysis, washing and bleaching.Form with pressed powder during ammonium paratungstate joins in the slurries, and WO in the ammonium paratungstate that is added
3Content is 88% ~ 91%.
Embodiment 4
Preparation ammoniacal liquor: liquefied ammonia is ammonia through decompression, ammonia is fed prepare concentrated ammonia liquor in the pure water, and is subsequent use.
Take by weighing the 10Kg metatitanic acid and (press TiO
2Meter), joins in the reactor of band agitating device, add a certain amount of deionized water, adjustment concentration of slurry 18～20wt%; After stirring, in slurry, add ammonium paratungstate (APT), tungstic acid with respect to titanium dioxide and tungstic acid weight and ratio be 7.0wt%; In slurry, add ammoniacal liquor adjustment pH value to 7.5～8.5; Filter through fully stirring the back, filtering the gained filtrate is block metatitanic acid; With the filter cake that obtains after the block metatitanic acid mechanical disintegration 200 ℃～350 ℃ dryings 2.5 hours, the calcining 3.5 hours in calciner again of the filter cake after the oven dry; Said calcining specifically comprised 0.8 hour, 400 ℃～580 ℃ calcinings of 350 ℃～400 ℃ calcinings 2.7 hours in 3.5 hours, and the calcining that calcining the is obtained kiln material that falls is pulverized with shearing pulverizer, is prepared into pulverous titanium dioxide-tungstic acid composite granule product.
Present embodiment, described raw material metatitanic acid are meant water that contains 5%～9% sulfuric acid and the titanium dioxide that the intermediate product titanyl sulfate obtains in the sulfate process titanium dioxide production after concentrated, hydrolysis, washing and bleaching.Form with pressed powder during ammonium paratungstate joins in the slurries, and WO in the ammonium paratungstate that is added
3Content is 88% ~ 91%.
Embodiment 5
Preparation ammoniacal liquor: liquefied ammonia is ammonia through decompression, ammonia is fed prepare concentrated ammonia liquor in the pure water, and is subsequent use.
Take by weighing the 10Kg metatitanic acid and (press TiO
2Meter), joins in the reactor of band agitating device, add a certain amount of deionized water, adjustment concentration of slurry 20～22wt%; After stirring, in slurry, add ammonium paratungstate (APT), tungstic acid with respect to titanium dioxide and tungstic acid weight and ratio be 9.0wt%; In slurry, add ammoniacal liquor adjustment pH value to 8.5; Filter through fully stirring the back, filtering the gained filtrate is block metatitanic acid; With the filter cake that obtains after the block metatitanic acid mechanical disintegration 200 ℃～350 ℃ dryings 2.5 hours; Filter cake after the oven dry was calcined in calciner 3.5 hours, wherein calcined specifically to be meant 0.8 hour, 400 ℃～580 ℃ calcinings of 350 ℃～400 ℃ calcinings 2.7 hours in 3.5 hours; The calcining that calcining the is obtained kiln material that falls is pulverized with shearing pulverizer, is prepared into pulverous titanium dioxide-tungstic acid composite granule product.
Present embodiment, described raw material metatitanic acid are meant water that contains 5%～9% sulfuric acid and the titanium dioxide that the intermediate product titanyl sulfate obtains in the sulfate process titanium dioxide production after concentrated, hydrolysis, washing and bleaching.Form with pressed powder during ammonium paratungstate joins in the slurries, and WO in the ammonium paratungstate that is added
3Content is 88% ~ 91%.
Embodiment 6
Preparation ammoniacal liquor: liquefied ammonia is ammonia through decompression, ammonia is fed prepare ammoniacal liquor in the pure water, and is subsequent use.
Take by weighing the 10Kg metatitanic acid and (press TiO
2Meter), joins in the reactor of band agitating device, add a certain amount of deionized water, adjustment concentration of slurry 20wt%; After stirring, in slurry, add ammonium paratungstate (APT), tungstic acid with respect to titanium dioxide and tungstic acid weight and ratio be 10.0wt%; In slurry, add ammoniacal liquor adjustment pH value to 8.0; Filter through fully stirring the back, filtering the gained filtrate is block metatitanic acid; With the filter cake that obtains after the block metatitanic acid mechanical disintegration 200 ℃～350 ℃ dryings 2.5 hours, with the filter cake after the oven dry 0.8 hour, 400 ℃～580 ℃ calcinings of 350 ℃～400 ℃ calcinings 2.7 hours.The calcining that calcining the is obtained kiln material that falls is pulverized with shearing pulverizer, is prepared into pulverous titanium dioxide-tungstic acid composite granule product.
Present embodiment, described raw material metatitanic acid are meant water that contains 5%～9% sulfuric acid and the titanium dioxide that the intermediate product titanyl sulfate obtains in the sulfate process titanium dioxide production after concentrated, hydrolysis, washing and bleaching.Form with pressed powder during ammonium paratungstate joins in the slurries, and WO in the ammonium paratungstate that is added
3Content is 88% ~ 91%.
The proterties result of the foregoing description gained catalyst carrier is reflected in the following table:
| WO 3/ TiO 2Weight ratio | Particle diameter/nm | Grinding particle size D50 (μ m) | Product purity % | Specific area m 2/ g | Denitration efficiency % | Pore volume mL/g | 10% suspension pH value | Extrusion molding rate % | Scasoning check rate % | |
| Embodiment 1 | 5:95 | 16.8 | 1.08 | 91.7 | 91.2 | 88.9 | 1.25 | 2.1 | 93.2 | 8.2 |
| Embodiment 2 | 4:96 | 17.5 | 1.07 | 92.5 | 85.4 | 85.3 | 1.18 | 2.3 | 91.0 | 8.6 |
| Embodiment 3 | 5:95 | 17.0 | 1.09 | 91.8 | 88.3 | 90.3 | 1.27 | 2.0 | 95.5 | 7.0 |
| Embodiment 4 | 7:93 | 16.5 | 1.11 | 89.5 | 93.0 | 92.5 | 1.15 | 1.9 | 90.0 | 9.7 |
| Embodiment 5 | 9:91 | 16.2 | 1.13 | 87.8 | 97.9 | 93.8 | 1.13 | 1.8 | 87.6 | 12.3 |
| Embodiment 6 | 10:90 | 15.8 | 1.15 | 86.9 | 100.5 | 95.6 | 1.09 | 1.7 | 85.7 | 14.1 |
In the last table, " denitration efficiency " is meant the denitration efficiency of the denitrating catalyst that the catalyst carrier processing and preparing of utilizing the present invention to prepare obtains.
As stated, just can realize the present invention preferably.
Claims (10)
1. one kind prepares denitration catalyst agent carrier TiO
2-WO
3The method of composite powder is characterized in that, comprises the steps:
1) the raw material metatitanic acid disperses through making beating, is adjusted to titanium dioxide TiO
2The mass fraction of meter is 15 ~ 25% concentration of slurry;
2) ratio in 4.0% ~ 10.0% adds ammonium paratungstate in slurries, and said ratio is calculated with respect to titanium dioxide and tungstic acid sum with the quality of tungstic acid
3) to through step 2) handle in the resulting slurries in back and add ammoniacal liquor, adjust pH value to 6.5 ~ 9.0;
The dope filtration dehydration that 4) will after step 3) is handled, obtain at block filter cake, and making block filter cake titanium dioxide mass fraction is 40%～55%;
5) with resultant block filter cake Mechanical Crushing behind the step 4) filtering means dehydration, the filter cake after the fragmentation was 200 ℃～350 ℃ dryings 2.5 hours, and the filter cake after the oven dry was 350 ℃～580 ℃ calcinings 3.5 hours;
6) calcining falls the kiln material after crushed, promptly makes denitration catalyst agent carrier TiO
2-WO
3Composite powder.
2. a kind of preparation denitration catalyst agent carrier TiO according to claim 1
2-WO
3The method of composite powder is characterized in that, described raw material metatitanic acid is the hydrated titanium dioxide that contains 5%～9% sulfuric acid.
3. a kind of preparation denitration catalyst agent carrier TiO according to claim 2
2-WO
3The method of composite powder is characterized in that, described raw material metatitanic acid is to be obtained after concentrated, hydrolysis, washing and bleaching by intermediate product titanyl sulfate in the sulfate process titanium dioxide production.
4. a kind of preparation denitration catalyst agent carrier TiO according to claim 3
2-WO
3The method of composite powder is characterized in that, said step 2) in ammonium paratungstate in WO
3Content is 88% ~ 91%.
5. a kind of preparation denitration catalyst agent carrier TiO according to claim 4
2-WO
3The method of composite powder is characterized in that, said step 2) in, ammonium paratungstate joins in the slurries with the form of pressed powder.
6. according to each described a kind of preparation denitration catalyst agent carrier TiO of claim 1-5
2-WO
3The method of composite powder is characterized in that, raw material metatitanic acid making beating dispersion is to adopt resistivity greater than 1.0 * 10 in the said step 1)
6The deionized water of Ω .cm or pure water.
7. a kind of preparation denitration catalyst agent carrier TiO according to claim 6
2-WO
3The method of composite powder is characterized in that, the ammoniacal liquor in the said step 3) prepares through following method: for ammonia, it is 23%～30% concentrated ammonia liquor that ammonia is fed the concentration for preparing in the pure water to liquefied ammonia through decompression.
8. a kind of preparation denitration catalyst agent carrier TiO according to claim 6
2-WO
3The method of composite powder is characterized in that, the ammoniacal liquor in the said step 3) is to reach the commercial ammoniacal liquor of analyzing pure standard.
9. a kind of preparation denitration catalyst agent carrier TiO according to claim 7
2-WO
3The method of composite powder is characterized in that, the filter cake described in the said step 5) specifically is meant 350 ℃～580 ℃ calcinings 3.5 hours: 0.8 hour, 400 ℃～580 ℃ calcinings of 350 ℃～400 ℃ calcinings 2.7 hours.
10. a kind of preparation denitration catalyst agent carrier TiO according to claim 9
2-WO
3The method of composite powder is characterized in that, the kiln material that falls of the calcining described in the said step 6) adopts shearing pulverizer to pulverize.
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| CN102896002A (en) * | 2012-10-10 | 2013-01-30 | 浙江海亮环境材料有限公司 | Method for preparing titanium dioxide-tungsten trioxide (TiO2-WO3) composite powder |
| CN102921472A (en) * | 2012-09-11 | 2013-02-13 | 河南佰利联化学股份有限公司 | Preparation method for titanium-tungsten composite powder as denitrification catalyst carrier |
| CN103349991A (en) * | 2013-07-30 | 2013-10-16 | 重庆新华化工有限公司 | Carrier for denitration catalyst |
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| CN104437469A (en) * | 2014-11-18 | 2015-03-25 | 郭燏 | Nanometer titanium dioxide powder for flue gas deodorization/denitration catalyst and preparation method and application thereof |
| CN107356634A (en) * | 2017-05-22 | 2017-11-17 | 江苏时瑞电子科技有限公司 | A kind of preparation method of tungsten oxide nitrogen-containing oxide gas sensitive |
| CN113735164A (en) * | 2021-08-18 | 2021-12-03 | 安徽迪诺环保新材料科技有限公司 | Nano titanium dioxide for high-sulfur and high-plasticity denitration and preparation method thereof |
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| CN102764662B (en) * | 2012-07-13 | 2014-09-10 | 重庆普源化工工业有限公司 | Preparation method of special titanium-tungsten powder for SCR (selective catalytic reduction) denitrification catalyst |
| CN102764662A (en) * | 2012-07-13 | 2012-11-07 | 重庆普源化工工业有限公司 | Preparation method of special titanium-tungsten powder for SCR (selective catalytic reduction) denitrification catalyst |
| CN102921472A (en) * | 2012-09-11 | 2013-02-13 | 河南佰利联化学股份有限公司 | Preparation method for titanium-tungsten composite powder as denitrification catalyst carrier |
| CN102896002A (en) * | 2012-10-10 | 2013-01-30 | 浙江海亮环境材料有限公司 | Method for preparing titanium dioxide-tungsten trioxide (TiO2-WO3) composite powder |
| CN103349991B (en) * | 2013-07-30 | 2015-04-08 | 重庆新华化工有限公司 | Carrier for denitration catalyst |
| CN103349991A (en) * | 2013-07-30 | 2013-10-16 | 重庆新华化工有限公司 | Carrier for denitration catalyst |
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| CN104117351A (en) * | 2013-11-20 | 2014-10-29 | 广西美之峰科技有限责任公司 | Preparation method of denitrification ceramic catalyst carrier |
| CN104117351B (en) * | 2013-11-20 | 2016-04-27 | 广西美之峰科技有限责任公司 | The preparation method of denitration ceramic catalyst carrier |
| CN104437469B (en) * | 2014-11-18 | 2016-08-17 | 郭燏 | A kind of nano-titanium dioxide powder for flue gas deodorize/denitrating catalyst and its preparation method and application |
| CN104437469A (en) * | 2014-11-18 | 2015-03-25 | 郭燏 | Nanometer titanium dioxide powder for flue gas deodorization/denitration catalyst and preparation method and application thereof |
| CN107356634A (en) * | 2017-05-22 | 2017-11-17 | 江苏时瑞电子科技有限公司 | A kind of preparation method of tungsten oxide nitrogen-containing oxide gas sensitive |
| CN113735164A (en) * | 2021-08-18 | 2021-12-03 | 安徽迪诺环保新材料科技有限公司 | Nano titanium dioxide for high-sulfur and high-plasticity denitration and preparation method thereof |
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