CN102580531A - Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof - Google Patents
Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof Download PDFInfo
- Publication number
- CN102580531A CN102580531A CN2012100080702A CN201210008070A CN102580531A CN 102580531 A CN102580531 A CN 102580531A CN 2012100080702 A CN2012100080702 A CN 2012100080702A CN 201210008070 A CN201210008070 A CN 201210008070A CN 102580531 A CN102580531 A CN 102580531A
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- Prior art keywords
- gas catalytic
- catalytic reducer
- tail gas
- low temperature
- exhaust gas
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 45
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 15
- 235000012501 ammonium carbonate Nutrition 0.000 claims abstract description 15
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 13
- 239000012498 ultrapure water Substances 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 61
- 230000003197 catalytic effect Effects 0.000 claims description 60
- 238000001914 filtration Methods 0.000 claims description 18
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910001424 calcium ion Inorganic materials 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 claims description 3
- 229910001415 sodium ion Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- 239000004721 Polyphenylene oxide Substances 0.000 abstract 1
- 150000001412 amines Chemical class 0.000 abstract 1
- 229920000570 polyether Polymers 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 abstract 1
- 230000008014 freezing Effects 0.000 description 13
- 238000007710 freezing Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 7
- 239000004202 carbamide Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 150000001298 alcohols Chemical class 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 150000003863 ammonium salts Chemical class 0.000 description 3
- 230000009931 harmful effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to a tail gas catalytic reduction agent and a preparation method thereof, and belongs to the technical field of chemical industry. Aiming at the characteristic that due to low-temperature performance, the conventional vehicular tail gas catalytic reduction agent only can be used at the temperature of -11 DEG C, a vehicular low temperature-resistant tail gas catalytic reduction agent which can be used at the low temperature of between -25 and -40 DEG C normally and accords with a selective catalytic reduction (SCR) system is compounded on the basis of the fundamental mechanism of a reduction agent. The tail gas catalytic reduction agent comprises the following components in percentage by weight: 30 to 60 percent of Adblue, 10 to 40 percent of ammonium carbonate, 10 to 40 percent of methanol, 0.02 to 0.2 percent of low-molecular weight polyether amine and 10 to 35 percent of ultrapure water. A blending process comprises the following steps of: dissolving, purifying and filling. The tail gas catalytic reduction agent is suitable to be used at the temperature of -11 DEG C and meets the requirement of the normal operation of the SCR system completely.
Description
Technical field
The present invention relates to a kind of tail gas catalytic reducer and preparation method thereof, belong to chemical technology field.
Background technology
At present; The freezing point that is suitable for the tail gas catalytic reducer-automobile-used tail gas catalytic reducer (AUS32) of SCR technology is-11 ℃; So the temperature in Chinese northern area winter generally all is lower than-11 ℃, to using traditional AUS32 to cause freezing harmful effect as automobile-used tail gas catalytic reducer, vehicle must be earlier through the heating system heating like this; Both increased the cost of SCR system; Again owing to use heating system just can bring into use the SCR system, the OBD of SCR system there is certain adverse effect, cause the rules of state's four dischargings phenomenon in violation of rules and regulations to occur in fulfillment process.Abroad also study for a long time for the anti-low temperature of tail gas catalytic reducer; The applicant recognizes that the prescription of anti-low temperature exhaust gas catalytic reducer mainly passes through the composite of some ammonium class materials; Through the qualified anti-low temperature exhaust gas catalytic reducer of certain mediation prepared; But because the severe corrosive of ammonium class material, the corrosion of metal of exhaust system is also received publicity always, fail to promote the use of on a large scale.Be employed in and add the emphasis that the low-carbon (LC) alcohols material also is research among the qualified Adblue; Because low-carbon alcohols all is to reduce the ability of freezing point; So add the freezing point that an amount of low-carbon alcohols can reduce tail gas catalytic reducer; But because the characteristic of low-carbon alcohols, the transformation efficiency of its NOx will reduce, so also fail to promote on a large scale.Just begin to be paid close attention in recent years owing to the SCR system at home by the people; The tail gas catalytic reducer market that is used for the SCR system is little; Anti-low temperature exhaust gas catalytic reducer is not research especially; But under the low temperature in winter of zone, the China north, vehicle is badly in need of cryophylactic tail gas catalytic reducer and is reduced freezing harmful effect.
Summary of the invention
The present invention wants the technical solution problem to be: be lower than-11 ℃ of icing defectives to domestic existing common tail gas absorption reducing agent; Propose a kind of anti-low temperature exhaust gas catalytic reducer and preparation method thereof, tail gas catalytic reducer can be used under-25 ℃～-40 ℃ low temperature.
The present invention is through following technical scheme technical solution problem: a kind of anti-low temperature exhaust gas catalytic reducer, by weight percentage, composed of the following components:
The Adblue 30%～60% that meets the ISO22241-1 standard
Ammonium carbonate 10%～40%
Methyl alcohol 10%～40%
Polyetheramine 0.02%～0.2%
Ultra-pure water 10%～35%.
Wherein, Adblue is translated into the diesel engine vent gas treatment fluid, and domestic being commonly called as is automobile urea, automobile-used urea, and automobile environment-protection urea is the running stores that must use in the SCR technology.Its constituent is about 32.5% high-purity urea and about 67.5% deionized water, meets the ISO22241-1 standard.
Said ammonium carbonate is pure for analyzing, its calcium ion≤0.5ppm.
Said methyl alcohol is pure for analyzing, its sodium ion, calcium ion all≤0.5ppm.
The molecular weight of said polyetheramine is M=1000-1500.
Said ultrapure resistivity of water is at 13～14M Ω * cm.
The said goods is obtained by following technical scheme: a kind of preparation method of tail gas catalytic reducer may further comprise the steps:
Step 1, dissolving add said Adblue, ammonium carbonate, methyl alcohol in the dissolving tank, mix, stir, and process the tail gas catalytic reducer first product,
Step 2, purification are purified said tail gas catalytic reducer first product through filtering, the tail gas catalytic reducer that obtains filtering separates the tail gas catalytic reducer that obtains separating again through film;
Step 3, process, said polyetheramine is added in the tail gas catalytic reducer that separates, and to use ultra-pure water adjustment mass percentage concentration be 30%～50%, promptly get cryophylactic tail gas catalytic reducer.
Wherein, in the said step 1, solution temperature is 30 ℃～35 ℃.
In the said step 2, bag filter, mechanical filter, the filtering accuracy that filters equipment for purifying and be filtering accuracy and be 10 microns is at least a in 0.45 micron the precision Filter element filter, and filtration flow-rate is controlled at 2m
3/ H～3m
3/ H.
The present invention is directed to the shortcoming of prior art; In the set of dispense ratio, adopted alcohols and ammonium class material to mix; Reduce the freezing point of product, product quality meets standard when practicing thrift cost, and the NOx conversion ratio of the reducing agent system that is composited also significantly increases than alcohols; Through adding polyetheramine, rust-preventing characteristic, dissolubility stability, the atomizing ability of product are strengthened.During preparation, adopt continuous purifying technique of slot type and film process for separating and purifying, make that entire production process is in closed pipeline, to carry out; Avoided the possibility of polluting; Multi-filtering is removed mechanical admixture, metal ion is carried out film separate, and makes that the agent of anti-low temperature exhaust gas absorption reducing obtains purifying.Adopt online control, make whole process of production that the control point all arranged, guaranteed the stability and the controllability of product.Its beneficial effect is: finished product can use under-25 ℃～-40 ℃ low temperature, for the large-scale popularization of domestic northern area SCR system lays the foundation.
The specific embodiment
Raw material of the present invention all can be buied from the market, and wherein Adblue meets the ISO22241-1 standard; Ammonium carbonate is pure for analyzing, the content≤0.5ppm of calcium ion wherein, methyl alcohol is pure for analyzing, wherein the content of sodium ion, calcium ion all≤0.5ppm; Below repeat no more.
Embodiment one
The set of dispense of this instance is such as descending (in weight %):
| Component | Form % |
| Adblue | 55 |
| Ammonium carbonate | 14 |
| Methyl alcohol | 20 |
| Polyetheramine (molecular weight 1010) | 0.1 |
| Ultra-pure water | 10.9 |
The component of said ratio is prepared by following step:
Step 1, dissolving with automobile-used urea, ammonium carbonate, methyl alcohol, join mixing in the dissolving tank, are warming up to 30 ℃, stir 20min, process the tail gas catalytic reducer first product;
The tail gas catalytic reducer first product is filtered in step 2, purification, and filter plant is made up of 10 μ bag filters, activated carbon filtration tower and 0.45 μ precision Filter element filter (PP material), is 2.5m with the flow velocity
3The tail gas catalytic reducer that obtains filtering through filter plant, again through molecular weight at 100,000 ultrafiltration folded membrane, the tail gas catalytic reducer that obtains separating;
Step 3, process, polyetheramine is added the tail gas catalytic reducer that separates, pulse 10min, using ultra-pure water to reconcile into mass percentage concentration is 32% anti-low temperature exhaust gas catalytic reducer.
Embodiment two
The set of dispense of this instance is such as descending (in weight %):
| Material | Form % |
| Adblue | 45 |
| Ammonium carbonate | 30 |
| Methyl alcohol | 10 |
| Polyetheramine (molecular weight 1200) | 0.15 |
| Ultra-pure water | 14.85 |
The component of said ratio is prepared by following step:
Step 1, dissolving with automobile-used urea, ammonium carbonate, methyl alcohol and ultra-pure water, join mixing in the dissolving tank, are warming up to 32 ℃, stir 20min, process the tail gas catalytic reducer first product;
The tail gas catalytic reducer first product is filtered in step 2, purification, and wherein filter plant is made up of 10 μ bag filters, activated carbon filtration tower and 0.45 μ precision Filter element filter (PP material), is 3.5m with the flow velocity
3Tail gas catalytic reducer through filter plant obtains filtering passes through the ultrafiltration folded membrane of molecular weight at 7-8 ten thousand, the tail gas catalytic reducer that obtains separating again;
Step 3, process, polyetheramine is added the tail gas catalytic reducer after filtering, pulse 10min, using ultra-pure water to reconcile into mass percentage concentration is 44.6% anti-low temperature exhaust gas catalytic reducer.
Embodiment three
The set of dispense of this instance is such as descending (in weight %):
| Material | Form % |
| Adblue | 35 |
| Ammonium carbonate | 35 |
| Methyl alcohol | 15 |
| Polyetheramine (molecular weight 1000) | 0.2 |
| Ultra-pure water | 14.8 |
The component of said ratio is prepared by following step:
Step 1, dissolving with automobile-used urea, ammonium carbonate, methyl alcohol and ultra-pure water, join mixing in the dissolving tank, are warming up to 35 ℃, stir 20min, process the tail gas catalytic reducer first product;
The tail gas catalytic reducer first product is filtered in step 2, purification, and wherein filter plant is made up of 10 μ bag filters, activated carbon filtration tower and 0.45 μ precision Filter element filter (PP material), is 2.5m with the flow velocity
3The tail gas catalytic reducer that obtains filtering through filter plant, again through molecular weight at 200,000 ultrafiltration folded membrane, the tail gas catalytic reducer that obtains separating;
Step 3, process, polyetheramine is added the tail gas catalytic reducer that separates, pulse 10min, using ultra-pure water to reconcile into mass percentage concentration is 46.4% anti-low temperature exhaust gas catalytic reducer.
The contrast experiment
Detect the freezing point of the anti-low temperature exhaust gas catalytic reducer that the foregoing description obtains according to conventional method, see table 1 for details:
| Embodiment | Freezing point |
| Embodiment one | -30℃ |
| Embodiment two | -35℃ |
| Embodiment three | -40℃ |
| Adblue | -11℃ |
Table 1
Can know by table 1; The freezing point of anti-low temperature exhaust gas catalytic reducer of the present invention is far below Adblue; Promptly; The anti-low temperature exhaust gas catalytic reducer that the foregoing description is processed can use under-25 ℃～-40 ℃ low temperature, is applicable to the vehicle under the low temperature in winter of China north zone, reduces the freezing harmful effect that vehicle is caused.
Tail gas catalytic reducer in Adblue, only to add alcohols is routine as a comparison, detects NO by conventional method
XConversion ratio, see table 2 for details:
| NO XConversion ratio | Embodiment | Comparative Examples |
| Freezing point is-30 ℃ NO XConversion ratio | 83% | 71% |
| Freezing point is-35 ℃ NO XConversion ratio | 80% | 63% |
| Freezing point be-40 ℃ NO XConversion ratio | 77% | 57% |
Table 2
Can know the NO of anti-low temperature exhaust gas catalytic reducer of the present invention by table 2
XConversion ratio is compared to the NO of the tail gas catalytic reducer that only adds alcohols
XConversion ratio is significantly improved.
Except that the foregoing description, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (8)
1. anti-low temperature exhaust gas catalytic reducer, by weight percentage, composed of the following components:
The Adblue 30%～60% that meets the ISO22241-1 standard
Ammonium carbonate 10%～40%
Methyl alcohol 10%～40%
Polyetheramine 0.02%～0.2%
Ultra-pure water 10%～35%.
2. anti-low temperature exhaust gas catalytic reducer according to claim 1 is characterized in that: said ammonium carbonate is for analyzing pure ammonium carbonate, wherein calcium ion content≤0.5ppm.
3. anti-low temperature exhaust gas catalytic reducer according to claim 1 is characterized in that: said methyl alcohol is for analyzing pure methyl alcohol, wherein sodium ion, calcium ion content all≤0.5ppm.
4. anti-low temperature exhaust gas catalytic reducer according to claim 1 is characterized in that: the molecular weight of said polyetheramine is M=1000-1500.
5. anti-low temperature exhaust gas catalytic reducer according to claim 1 is characterized in that: said ultrapure resistivity of water is between 13～14M Ω * cm.
6. according to the preparation method of the said anti-low temperature exhaust gas catalytic reducer of claim 1, may further comprise the steps:
Step 1, dissolving add said Adblue, ammonium carbonate, methyl alcohol in the dissolving tank, mix, stir, and process the tail gas catalytic reducer first product;
Step 2, purification are purified said tail gas catalytic reducer first product through filtering, the tail gas catalytic reducer that obtains filtering separates the tail gas catalytic reducer that obtains separating again through film;
Step 3, process, said polyetheramine is added in the tail gas catalytic reducer that separates, and to use ultra-pure water adjustment mass percentage concentration be 30%～50%, promptly get cryophylactic tail gas catalytic reducer.
7. according to the preparation method of the said anti-low temperature exhaust gas catalytic reducer of claim 6, it is characterized in that: in the said step 1, solution temperature is 30 ℃～35 ℃.
8. according to the preparation method of the said anti-low temperature exhaust gas catalytic reducer of claim 6; It is characterized in that: in the said step 2; Bag filter, mechanical filter, the filtering accuracy that filters equipment for purifying and be filtering accuracy and be 10 microns is at least a in 0.45 micron the precision Filter element filter, and filtration flow-rate is controlled at 2m
3/ H～3m
3/ H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210008070.2A CN102580531B (en) | 2012-01-12 | 2012-01-12 | Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210008070.2A CN102580531B (en) | 2012-01-12 | 2012-01-12 | Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102580531A true CN102580531A (en) | 2012-07-18 |
| CN102580531B CN102580531B (en) | 2014-01-08 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128090A (en) * | 2014-08-03 | 2014-11-05 | 长春市永畅实业有限责任公司 | Reducing agent satisfying low temperature removal of nitrogen oxides of vehicles |
| CN104147926A (en) * | 2014-08-03 | 2014-11-19 | 长春市永畅实业有限责任公司 | Reducing agent mixture capable of releasing ammonia at low temperature |
| CN104265422A (en) * | 2014-08-03 | 2015-01-07 | 长春市永畅实业有限责任公司 | Low-temperature condition release ammonia reducing agent composition and preparation method thereof |
| CN104307366A (en) * | 2014-10-21 | 2015-01-28 | 张家港迪克汽车化学品有限公司 | Diesel vehicle tail gas catalyst reduction composition |
| CN105688669A (en) * | 2016-03-08 | 2016-06-22 | 江苏可兰素汽车环保科技有限公司 | Comb-shaped polyacrylamide crystal growth disrupting agent, crystallization-resistant type tail gas catalytic reducing agent prepared from disrupting agent and preparation method |
| CN105854603A (en) * | 2016-05-10 | 2016-08-17 | 南宁市夏阳化工科技有限责任公司 | Diesel tail gas treating agent production method |
| CN106745060A (en) * | 2016-12-14 | 2017-05-31 | 河南省化工研究所有限责任公司 | A kind of low form urea for vehicle solution and preparation method thereof |
| CN107198943A (en) * | 2017-05-02 | 2017-09-26 | 山西艾珂灵环境科技有限公司 | A kind of tail gas absorption liquid |
| CN108443000A (en) * | 2018-02-12 | 2018-08-24 | 新疆现代特油科技股份有限公司 | The automobile-used purified treatment liquid of low temperature |
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| DE102006059760A1 (en) * | 2006-12-18 | 2008-06-19 | Skw Stickstoffwerke Piesteritz Gmbh | Preparing pure urea solution, useful as reducing agent for selective catalytic reduction of nitrogen oxides, comprises rinsing urea solution in deaerator, separating urea crystals and re-circulating mother liquor enriched with biuret |
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| CN101811065A (en) * | 2010-04-20 | 2010-08-25 | 江苏可兰素汽车环保科技有限公司 | Production process for tail gas catalytic reducer |
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2012
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| DE102006059760A1 (en) * | 2006-12-18 | 2008-06-19 | Skw Stickstoffwerke Piesteritz Gmbh | Preparing pure urea solution, useful as reducing agent for selective catalytic reduction of nitrogen oxides, comprises rinsing urea solution in deaerator, separating urea crystals and re-circulating mother liquor enriched with biuret |
| CN101560422A (en) * | 2008-11-05 | 2009-10-21 | 戴伟平 | AdBlue composition as reducing agent for diesel engine with SCR technology |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128090A (en) * | 2014-08-03 | 2014-11-05 | 长春市永畅实业有限责任公司 | Reducing agent satisfying low temperature removal of nitrogen oxides of vehicles |
| CN104147926A (en) * | 2014-08-03 | 2014-11-19 | 长春市永畅实业有限责任公司 | Reducing agent mixture capable of releasing ammonia at low temperature |
| CN104265422A (en) * | 2014-08-03 | 2015-01-07 | 长春市永畅实业有限责任公司 | Low-temperature condition release ammonia reducing agent composition and preparation method thereof |
| CN104307366A (en) * | 2014-10-21 | 2015-01-28 | 张家港迪克汽车化学品有限公司 | Diesel vehicle tail gas catalyst reduction composition |
| CN105688669A (en) * | 2016-03-08 | 2016-06-22 | 江苏可兰素汽车环保科技有限公司 | Comb-shaped polyacrylamide crystal growth disrupting agent, crystallization-resistant type tail gas catalytic reducing agent prepared from disrupting agent and preparation method |
| CN105688669B (en) * | 2016-03-08 | 2018-03-09 | 江苏可兰素汽车环保科技有限公司 | Pectination polyacrylamide crystalloid increases agent interfering, the resistive connection crystal formation tail gas catalytic reducer prepared using the agent interfering and preparation method |
| CN105854603A (en) * | 2016-05-10 | 2016-08-17 | 南宁市夏阳化工科技有限责任公司 | Diesel tail gas treating agent production method |
| CN106745060A (en) * | 2016-12-14 | 2017-05-31 | 河南省化工研究所有限责任公司 | A kind of low form urea for vehicle solution and preparation method thereof |
| CN107198943A (en) * | 2017-05-02 | 2017-09-26 | 山西艾珂灵环境科技有限公司 | A kind of tail gas absorption liquid |
| CN108443000A (en) * | 2018-02-12 | 2018-08-24 | 新疆现代特油科技股份有限公司 | The automobile-used purified treatment liquid of low temperature |
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Effective date of registration: 20130621 Address after: 210000, 9 Nanjing Road, economic and Technological Development Zone, Jiangsu, China Applicant after: KELAS ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 210000, 9 Nanjing Road, economic and Technological Development Zone, Jiangsu, China Applicant before: Shi Junfeng |
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| C14 | Grant of patent or utility model | ||
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Application publication date: 20120718 Assignee: JIANGSU LOPAL TECH. Co.,Ltd. Assignor: KELAS ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Contract record no.: 2014320000039 Denomination of invention: Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof Granted publication date: 20140108 License type: Exclusive License Record date: 20140217 |
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| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU LOPAL TECH. CO., LTD. Free format text: FORMER NAME: KLS AUTO ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 210038 No. 6 Hengtong Road, Nanjing economic and Technological Development Zone, Jiangsu Patentee after: JIANGSU LOPAL TECH. Co.,Ltd. Address before: 210000, 9 Nanjing Road, economic and Technological Development Zone, Jiangsu, China Patentee before: KELAS ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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| CI01 | Publication of corrected invention patent application |
Correction item: Patentee name Correct: KLS Auto Environmental Protection Technology Co., Ltd. False: JIANGSU LOPAL TECH. CO., LTD. Number: 15 Volume: 30 |
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Assignee: JIANGSU LOPAL TECH. Co.,Ltd. Assignor: KELAS ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Contract record no.: 2014320000039 Date of cancellation: 20140402 |
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Free format text: CORRECT: NAME OF PATENTEE; FROM: JIANGSU LOPAL TECH. CO., LTD. TO: KLS AUTO ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
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Application publication date: 20120718 Assignee: JIANGSU LOPAL TECH. Co.,Ltd. Assignor: KELAS ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Contract record no.: 2018320000050 Denomination of invention: Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof Granted publication date: 20140108 License type: Exclusive License Record date: 20180309 |
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