• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Use of substances from the substance group Cx + 1H2X + 3 (C2H4O) yOH where X = | (44y / W-44y + 17 / W-32) / 14 | 1§ys2ooßsswsno as an additive to urea solutions to counteract the risk of catalyst clogging.
    公开号:SE1000404A1
    申请号:SE1000404
    申请日:2010-04-21
    公开日:2011-04-17
    发明作者:Sara Sebelius
    申请人:
    IPC主号:
    专利说明:

    The patent application relates to the use of the following substance group as an additive to urea solutions inpurpose to minimize deposits and clumping in the SCR system:Cx + 1H2x + 3 (C2H40) yOHwherex = | (44y / W-44y + 17 / W- 32) / 14 |15yS200.58 SWS 1.0Experimental partUrea solution 1 consisted of a 32.5% aqueous solution of urea (the largest commercially availablebrand on the market).
    Urea solution 2 consisted of a 32.5% aqueous solution of urea (another commercially availablebrand on the market).
    Urea solution 3 consisted of the 32.5% aqueous solution of urea sold premixed with afillsatsänme (Diaxoö).
    Urea solution 4 consisted of urea solution 1 with <0.1% of an additive from the groupCX + 1H2X + 3 (C2H4O) yOH. The mixing took place at room temperature.
    Urea solution 5 consisted of urea solution 2 with <0.1% of an additive from the groupCX + 1H2x + 3 (C2H4O) yOH. The mixing took place at room temperature.
    The urea solution was dosed in a system of 250 ° C and 350 ° C (commonly used)exhaust gas temperatures during clumping). All attempts were repeated twice.
    TryAfter 16 hours at 250 ° C, decimeter-sized white lumps had formed in both experimentsurea solution 1 and urea solution 2 while the experiments with urea solution 3, urea solution 4 andurea solution 5 barely gave rise to any white deposits. With ureal solution 3 had insteadblack insoluble deposits formed. Both water-based and oil-based solventstested. No black deposits were observed for urea solution 4 and urea solution 5.
    Try BAfter 16 hours at 350 ° C, centimeter-sized white lumps had formed in both experimentsurea solution 1 and urea solution 2 while the experiments with urea solution 3, urea solution 4 andurea solution 5 did not give rise to any white deposits at all. With ureal solution 3 had blacksinsoluble deposits formed. Already after 0.5 hour, the black deposits had begun to form.
    No black deposits were observed for urea solution 4 and urea solution 5.
    The ability to reduce the clumping of urea and its degradation products (the whitesthe lumps) were thus as good for urea solution 4 and urea solution 5 as for urea solution 3.
    Unique for urea solution 4 and urea solution 5 (urea solutions with additivesCX + 1H2X + 3 (C2H4O) yOH) is that they do not (unlike ureal solution 3) give rise to anyblack insoluble deposits.
    We observe the same effect for the additives from the substance group Cx + 1H2X + 3 (C2H4O) yOH when yVaillef '1 - 20. VaIkCII C3H7 (C2H4O) 1OH, C6H13 (C2H40) 4OH, C9H19 (C2H40) 10UH C11Cl'C1gH37 (C2H4O) 200H gave rise to some black deposits and the white urea lumps hadalmost completely eliminated in both Experiment A and Experiment B.
    Comparative experiments have also been performed with the previously known additives diethylene glycoland polyethylene glycol which show that they do not achieve an equally high effect of reducing the formation ofurea lumps. See below.
    When H (C 2 H 4 O) 2 OH (diethylene glycol) and H (C 2 H 4 O) 10 OH (polyethylene glycol) are used asadditives urea lumps form to a lesser extent than the experiments without additives(ureal solution 1 and ureal solution 2) but the ability to reduce lump formation is not as highas the ability of the additives CX + 1H2X + 3 (C2H4O) YOH. When diethylene glycol orpolyethylene glycol is used as an additive to urea solution 1 and urea solution 2 and is dosed in16 hours at 250 ° C (cf. Experiment A) white urea lumps form one third of the size compared towith urea solutions without additives. At 16 hours dosing at 350 ° C Ümf experiment B)white urea lumps of halved size are formed compared to the urea solutions without additives.
    The lump formation is thus eliminated, but not at all to the same extent as with additives fromsubstance group CX + 1H2X + 3 (C2H4O) ,, OH.
    We have also been able to observe the importance of the length of the carbon chain in our subject groupthe additive. A shorter carbon chain has a worse effect against urea lump formation.
    CH _>, (C2H4O) OH gives slightly more white deposits than C3H -, »(C2H4O) OH. In the same wayCH3 (C2H4O) 2OH slightly worse properties than C4H9 (C2H4O) 2OH but both CH3 (C2H4O) 20Hand C4H9 (C2PI4O) 2OH show better reducing ability on urea lump formation than theircorresponding ethylene glycols without carbon chain (diethylene glycol).
    权利要求:
    Claims (1)
    [1]
    Use of the subject group CX + 1Hzx + 3 (C2H4O) yOH where x = (44y / W - 44y + 17 / W- 32) / 14 | 19:20 0.58 swí 1.0 as an additive to urea solutions for catalysts in exhaust gas purification.
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    同族专利:
    公开号 | 公开日
    CN102665873A|2012-09-12|
    CA2776509A1|2011-04-21|
    US20120219485A1|2012-08-30|
    EP2488283A1|2012-08-22|
    EP2488283A4|2013-10-30|
    CN102665873B|2014-12-03|
    BR112012008955A2|2018-11-06|
    SE534217C2|2011-06-07|
    EP2488283B1|2014-12-24|
    CA2776509C|2017-06-06|
    WO2011046491A1|2011-04-21|
    SE534217E|2015-03-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3954660A|1974-07-23|1976-05-04|Continental Oil Company|Anionic surfactant slurry having increased viscosity and method of providing said slurry|
    US5489419A|1992-10-13|1996-02-06|Nalco Fuel Tech|Process for pollution control|
    US20040060229A1|1999-12-10|2004-04-01|Todd Thomas A.|Fuel additive systems|
    DE10154421A1|2001-11-06|2003-05-22|Bosch Gmbh Robert|Method and device for reducing nitrogen oxides in an exhaust gas|
    FR2912932B1|2007-02-23|2011-06-10|Total France|AQUEOUS SOLUTION FOR THE TREATMENT OF EXHAUST GASES FROM DIESEL ENGINES|
    BRPI0920383B1|2008-10-14|2019-12-17|Yara Int Asa|method to minimize the diameter of a urea solution, urea solution and use of a surfactant in urea solution|JP5906637B2|2011-09-28|2016-04-20|いすゞ自動車株式会社|Foreign matter removal method and selective reduction catalyst system|
    CN104226093A|2014-07-17|2014-12-24|赵根华|Composite additive of automobile urea solution|
    FR3044564B1|2015-12-02|2021-01-22|Total Marketing Services|UREA-BASED COMPOSITION FOR THE TREATMENT OF EXHAUST GASES|
    FR3064495B1|2017-03-31|2021-04-02|Total Marketing Services|UREA-BASED COMPOSITION FOR THE TREATMENT OF EXHAUST GASES|
    FR3108529A1|2020-03-30|2021-10-01|Total Marketing Services|Use of a composition comprising a reducing agent, at least one paraffin and a metal compound to prevent deposits in the exhaust lines comprising an SCR catalyst|
    FR3108526A1|2020-03-30|2021-10-01|Total Marketing Services|Use of a composition comprising a reducing agent, a surfactant and a metal compound to prevent deposits in the exhaust lines comprising an SCR catalyst|
    FR3108527A1|2020-03-30|2021-10-01|Total Marketing Services|Use of a composition comprising a reducing agent and a metal compound to prevent deposits in the exhaust lines comprising an SCR catalyst|
    法律状态:
    2015-06-23| RPOP| Patent has been republished in amended form after opposition|
    优先权:
    申请号 | 申请日 | 专利标题
    SE0901329|2009-10-16|
    SE1000404A|SE534217E|2009-10-16|2010-04-21|Substance to add urea solutions|SE1000404A| SE534217E|2009-10-16|2010-04-21|Substance to add urea solutions|
    EP10823687.8A| EP2488283B1|2009-10-16|2010-10-01|Additive to urea solutions|
    CA2776509A| CA2776509C|2009-10-16|2010-10-01|Additive to urea solutions|
    BR112012008955A| BR112012008955A2|2009-10-16|2010-10-01|additive for urea solutions|
    PCT/SE2010/051057| WO2011046491A1|2009-10-16|2010-10-01|Additive to urea solutions|
    US13/501,114| US20120219485A1|2009-10-16|2010-10-01|Additive to urea solutions|
    CN201080046532.9A| CN102665873B|2009-10-16|2010-10-01|Additive to urea solutions|
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