CN103386329B - The production technology of diesel motor exhaust inorganic agent active carrier - Google Patents
The production technology of diesel motor exhaust inorganic agent active carrier Download PDFInfo
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- CN103386329B CN103386329B CN201310324108.1A CN201310324108A CN103386329B CN 103386329 B CN103386329 B CN 103386329B CN 201310324108 A CN201310324108 A CN 201310324108A CN 103386329 B CN103386329 B CN 103386329B
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Abstract
The present invention relates to a kind of vent gas treatment agent active carrier, be specifically related to a kind of diesel motor exhaust inorganic agent active carrier and production technology thereof, comprise the following steps that 1, select surface area more than or equal to 250 m2/ g, particle diameter D(50)Less than or equal to 2, free acid SO4 2‑Content 2～the metatitanic acid of 4%；2, washing metatitanic acid to Fe2O3Content is less than 50ppm；3, raw material ionized water step 2 obtained solid content of pulling an oar is 25～40%, stirring simultaneously adds the secondary tungsten acid ammonium solution of 200～450g/l, 4, stable calcining, time is 2～5h, temperature is 300～550 DEG C, 5, it is crushed to the product that particle diameter is 0.8～1.5um, use the carrier of technical solution of the present invention, there is not lattice variations at 1000 DEG C in it, therefore has greater catalytic reaction bearing capacity in 6～10h times, preferably temperature tolerance, can work long hours in the diesel motor exhaust environment of condition sternness.
Description
Technical field
The present invention relates to a kind of vent gas treatment agent active carrier, be specifically related to a kind of diesel motor exhaust inorganic agent active carrier and production technology thereof.
Background technology
China's motor vehicles in 2012 reaches 2.33 hundred million, wherein 1.14 hundred million, automobile, 1.03 hundred million, motorcycle.And China's diesel oil vehicle exhaust discharge standard falls behind 10 years than developed country, control exhaust emissions and protect environment, it has also become an important job.
The particularity processed due to diesel oil vehicle exhaust, single gas treatment amount is less, and tail gas flow velocity is fast.This just requires that the carrier of vent gas treatment agent has catalytic reaction bearing capacity more higher than common catalyzed agent carrier, more preferable reactivity.
Summary of the invention
The technical problem to be solved in the present invention is to provide the production technology of the higher diesel motor exhaust inorganic agent active carrier of a kind of catalytic reaction bearing capacity.
To achieve these goals, the present invention provides the production technology of a kind of diesel motor exhaust inorganic agent active carrier, comprises the following steps that
1) raw material metatitanic acid is prepared: its specific surface area is more than or equal to 250 m2/ g, particle diameter D(50)Less than or equal to 2, free acid SO4 2-Content 2～4%；
2) metatitanic acid is handled as follows: hang in sink after first awarding material with leaf filter and carry out once washing, to Fe2O3Content is less than 250ppm, then bleaches, and makes the high ferro not washed away in metatitanic acid be changed into ferrous iron, then carries out secondary washing by diaphragm filter press, to Fe2O3Content is less than 50ppm；
3) raw material ionized water step 2 obtained solid content of pulling an oar is 25～40%, and stirring simultaneously adds the secondary tungsten acid ammonium solution of 200～450g/l, and the amount that ammonium paratungstate adds need to ensure WO in finished product3Content is 10～11%, can calculate according to material total amount；
4) material step 3 obtained is calcined from kiln tail entrance rotary kiln with fluid form, and from kiln hood uniform discharge, combustor is placed in kiln hood stable heating, it is ensured that the thermograde in rotary kiln is consistent, and calcination time is 2～5h, and temperature is 300～550 DEG C；
5) crushing material calcining obtained is to the product that particle diameter is 0.8～1.5um, and index is specific surface area 95～115m2/ g, total SO4 2-
Content 2～4%,
WO3Content 10～11%, Fe2O3Content is less than 100ppm, k2O content is less than 100ppm, Na2O content is less than 100ppm.
The production technology using the diesel motor exhaust inorganic agent active carrier of technique scheme has the advantage that in step 3 that solid content of pulling an oar is 25～40%, be conducive to water resource and the saving of the energy, the amount of ammonium paratungstate and feed postition, make the stabilized metal of product, cohesion molding is easier to, in step 5, the time of material calcining is shorter, be conducive to saving the energy, product can be at 1000 DEG C, lattice variations is there is not in 6～10h times, and diesel motor exhaust temperature about 500～600 DEG C is well below product lattice variations temperature, therefore product has greater catalytic reaction bearing capacity, preferably temperature tolerance, can work long hours in the environment of condition sternness.
Detailed description of the invention
Embodiment 1
1) raw material metatitanic acid is prepared: its specific surface area is equal to 250 m2/ g, particle diameter D(50)Equal to 2, free acid SO4 2-
Content 2～4%；
2) metatitanic acid is handled as follows: hang in sink after first awarding material with leaf filter and carry out once washing, to Fe2O3Content is less than 250ppm, then bleaches, and makes the high ferro not washed away in metatitanic acid be changed into ferrous iron, then carries out secondary washing by diaphragm filter press, to Fe2O3Content is less than 50ppm；
3) raw material ionized water step 2 obtained solid content of pulling an oar is 25～40%, and stirring simultaneously adds the secondary tungsten acid ammonium solution of 450g/l, and the amount that ammonium paratungstate adds need to ensure WO in finished product3Content is 10～11%, can calculate according to material total amount；
4) material step 3 obtained is calcined from kiln tail entrance rotary kiln with fluid form, and from kiln hood uniform discharge, combustor is placed in kiln hood stable heating, it is ensured that the thermograde in rotary kiln is consistent, and calcination time is 5h, and temperature is 550 DEG C；
5) crushing material calcining obtained is to the product that particle diameter is 0.8～1.5um, and index is specific surface area 95～115m2/ g, total SO4 2-
Content 2～4%,
WO3Content 10～11%, Fe2O3Content is less than 100ppm, k2O content is less than 100ppm, Na2O content is less than 100ppm.
Can there is not lattice variations in 6～10h times at 1000 DEG C, and diesel motor exhaust temperature about 500～600 DEG C be well below product lattice variations temperature in the product that step 6 obtains, therefore this product has greater catalytic reaction bearing capacity.
Following table is before and after product is calcined at 1000 DEG C, the situation of change of BET:
| Calcination time | BET m2/g |
| Do not calcine | 67.34 |
| 6h | 66.14 |
| 7h | 66.08 |
| 8h | 66.01 |
| 9h | 65.90 |
| 10h | 65.76 |
Embodiment 2
1) raw material metatitanic acid is prepared: its specific surface area is more than 250 m2/ g, particle diameter D(50)Less than 2, free acid SO4 2-Content 4%；
2) metatitanic acid is handled as follows: hang in sink after first awarding material with leaf filter and carry out once washing, to Fe2O3Content is less than 250ppm, then bleaches, and makes the high ferro not washed away in metatitanic acid be changed into ferrous iron, then carries out secondary washing by diaphragm filter press, to Fe2O3Content is less than 50ppm；
3) raw material ionized water step 2 obtained solid content of pulling an oar is 25%, and stirring simultaneously adds the secondary tungsten acid ammonium solution of 200g/l, and the amount that ammonium paratungstate adds need to ensure WO in finished product3Content is 10～11%, can calculate according to material total amount；
4) material step 3 obtained is calcined from kiln tail entrance rotary kiln with fluid form, and from kiln hood uniform discharge, combustor is placed in kiln hood stable heating, it is ensured that the thermograde in rotary kiln is consistent, and calcination time is 2h, and temperature is 300 DEG C；
5) crushing material calcining obtained is to the product that particle diameter is 0.8～1.5um, and index is specific surface area 95～115m2/ g, total SO4 2-
Content 2～4%,
WO3Content 10～11%, Fe2O3Content is less than 100ppm, k2O content is less than 100ppm, Na2O content is less than 100ppm.
Following table is before and after product is calcined at 1000 DEG C, the situation of change of BET:
| Calcination time | BET m2/g |
| Do not calcine | 65.21 |
| 6h | 64.14 |
| 7h | 64.08 |
| 8h | 63.94 |
| 9h | 63.81 |
| 10h | 63.57 |
Embodiment 3
1) raw material metatitanic acid is prepared: its specific surface area is more than or equal to 250 m2/ g, particle diameter D(50)Less than or equal to 2, free acid SO4 2-Content 2%；
2) metatitanic acid is handled as follows: hang in sink after first awarding material with leaf filter and carry out once washing, to Fe2O3Content is less than 250ppm, then bleaches, and makes the high ferro not washed away in metatitanic acid be changed into ferrous iron, then carries out secondary washing by diaphragm filter press, to Fe2O3Content is less than 40ppm；
3) raw material ionized water step 2 obtained solid content of pulling an oar is 35%, and stirring simultaneously adds the secondary tungsten acid ammonium solution of 350g/l, and the amount that ammonium paratungstate adds need to ensure WO in finished product3Content is 10～11%, can calculate according to material total amount；
4) material step 3 obtained is calcined from kiln tail entrance rotary kiln with fluid form, and from kiln hood uniform discharge, combustor is placed in kiln hood stable heating, it is ensured that the thermograde in rotary kiln is consistent, and calcination time is 2～5h, and temperature is 300～550 DEG C；
5) crushing material calcining obtained to particle diameter is the product of 0.9um, and index is specific surface area 95～115m2/ g, total SO4 2-Content 2～4%, WO3Content 10～11%, Fe2O3Content is less than 100ppm, k2O content is less than 100ppm, Na2O content is less than 100ppm.
Following table is before and after product is calcined at 1000 DEG C, the situation of change of BET:
| Calcination time | BET m2/g |
| Do not calcine | 65.86 |
| 6h | 64.45 |
| 7h | 64.36 |
| 8h | 64.19 |
| 9h | 64.01 |
| 10h | 63.87 |
Above-described is only the certain preferred embodiments of the present invention; it should be pointed out that, for a person skilled in the art, on the premise of without departing from instant component, proportioning and technological parameter; can also make some improvement, these also should be considered as protection scope of the present invention.
Claims (1)
1. the production technology of a diesel motor exhaust inorganic agent active carrier, it is characterised in that comprise the following steps that
1) raw material metatitanic acid is prepared: its specific surface area is more than or equal to 250 m2/ g, particle diameter D(50 )Less than or equal to 2, free acid SO4 2-
Content 2～4%；
2) metatitanic acid is handled as follows: hang in sink after first awarding material with leaf filter and carry out once washing, to Fe2O3Content is less than 250ppm, then bleaches, and makes the high ferro not washed away in metatitanic acid be changed into ferrous iron, then carries out secondary washing by diaphragm filter press, to Fe2O3Content is less than 50ppm；
3) raw material ionized water step 2 obtained solid content of pulling an oar is 25～40%, and stirring simultaneously adds the secondary tungsten acid ammonium solution of 200～450g/l, it is ensured that WO in finished product3Content is 10～11%；
4) material step 3 obtained is calcined from kiln tail entrance rotary kiln with fluid form, and from kiln hood uniform discharge, combustor is placed in kiln hood stable heating, it is ensured that the thermograde in rotary kiln is consistent, and calcination time is 2～5h, and temperature is 300～550 DEG C；
5) crushing material calcining obtained is to the product that particle diameter is 0.8～1.5um, and index is specific surface area 95～115m2/ g, total SO4 2-Content 2～4%, WO3Content 10～11%, Fe2O3Content is less than 100ppm, k2O content is less than 100ppm, Na2O content is less than 100ppm.
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| CN101396656A (en) * | 2008-10-23 | 2009-04-01 | 清华大学 | Power plant flue-gas SCR denitration catalyst capable of preventing sulfur trioxide poisoning and preparation method thereof |
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| CN102416333A (en) * | 2011-11-11 | 2012-04-18 | 中国科学院广州能源研究所 | Special tungsten-containing nano titanium dioxide for flue gas denitration catalyst and manufacturing method thereof |
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| JP4801461B2 (en) * | 2006-02-16 | 2011-10-26 | 三菱重工業株式会社 | Method for producing exhaust gas treatment catalyst |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172647A (en) * | 2007-10-19 | 2008-05-07 | 杨绍泉 | Method for producing gtitanium dioxide with sulphuric acid method |
| CN101396656A (en) * | 2008-10-23 | 2009-04-01 | 清华大学 | Power plant flue-gas SCR denitration catalyst capable of preventing sulfur trioxide poisoning and preparation method thereof |
| CN102294273A (en) * | 2011-07-19 | 2011-12-28 | 四川华铁钒钛科技股份有限公司 | Preparation method for TiO2-WO3 composite powder used as catalyst carrier |
| CN102327783A (en) * | 2011-07-19 | 2012-01-25 | 四川华铁钒钛科技股份有限公司 | Method for preparing denitration catalyst carrier TiO2-WO3 composite powder |
| CN102416333A (en) * | 2011-11-11 | 2012-04-18 | 中国科学院广州能源研究所 | Special tungsten-containing nano titanium dioxide for flue gas denitration catalyst and manufacturing method thereof |
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Effective date of registration: 20210827 Address after: 402660 No.1 Minfeng Road, Guilin sub district office, Tongnan District, Chongqing Patentee after: CHONGQING MINFENG CHEMICAL Co.,Ltd. Address before: 402660 No. 298 Minye street, Guilin sub district office, Tongnan County, Chongqing Patentee before: CHONGQING XINHUA CHEMICAL Co.,Ltd. |