公开(公告)号：WO2015187780A1

公开(公告)日：2015-12-10

申请号：PCT/US2015/033904

申请日：2015-06-03

Applicant: SOLVAY SA ,  RAYTHATHA, Rasik H.

Inventor： RAYTHATHA, Rasik H.

IPC: A62D101/08 ,  C22B7/02 ,  B09B3/00 ,  B01D53/73

CPC classification number: A62D3/33 ,  A62D2101/08 ,  A62D2101/24 ,  A62D2101/43 ,  B01D53/40 ,  B01D53/64 ,  B01D53/73 ,  B01D53/78 ,  B01D53/83 ,  B01D2251/304 ,  B01D2251/404 ,  B01D2251/406 ,  B01D2251/606 ,  B01D2257/2045 ,  B01D2257/2047 ,  B01D2257/302 ,  B01D2258/0283 ,  B09B3/00 ,  B09B3/0008 ,  B09B3/0041 ,  B09B2220/06 ,  C04B18/021 ,  C04B18/08 ,  C04B20/1085 ,  C04B2111/00767 ,  C04B2111/00784 ,  F23J15/003 ,  Y02W30/91 ,  Y02W30/92 ,  C04B20/023 ,  C04B14/26 ,  C04B22/124 ,  C04B22/143 ,  C04B22/149 ,  C04B12/04

Abstract: A treatment method for coal fly ash, and in particular sodic fly ash, comprises 1) contacting the coal fly ash with anhydrite, and 2) contacting the coal fly ash in the presence of water with at least one additive. The material obtained from the contacting steps (1) and (2) may be dried. The steps (1) and (2) may be carried simultaneously or sequentially. The additive may comprise at least one component selected from the group consisting of strontium-containing compounds, barium-containing compounds, dolomite, a dolomite derivative such as calcined or hydrated dolomite, water-soluble sources of silicate such as sodium or potassium silicate, iron-containing compounds, and any combinations thereof. A particularly preferred additive comprises sodium silicate. The method may be effective in reducing the sodium content in the fly ash (Na2O), reducing the alkalinity of the fly ash, and/or stabilizing at least one heavy metal such as selenium and/or arsenic to reduce their leachability.

Abstract translation: 煤飞灰，特别是钠粉煤灰的处理方法包括：1）将煤飞灰与无水石膏接触，2）在水存在下与煤飞灰与至少一种添加剂接触。 可以将从接触步骤（1）和（2）获得的材料干燥。 步骤（1）和（2）可以同时或顺序地进行。 添加剂可以包括选自含锶化合物，含钡化合物，白云石，白云石衍生物如煅烧或水合白云石的至少一种成分，水溶性硅酸钠源，例如硅酸钠或硅酸钾，铁 的化合物及其任何组合。 特别优选的添加剂包括硅酸钠。 该方法可以有效地降低飞灰（Na2O）中的钠含量，降低飞灰的碱度，和/或稳定至少一种重金属如硒和/或砷以降低它们的可浸出性。

公开(公告)号：WO2015187778A1

公开(公告)日：2015-12-10

申请号：PCT/US2015/033900

申请日：2015-06-03

Applicant: SOLVAY SA ,  RAYTHATHA, Rasik H. ,  SAVARY, David Jean

Inventor： RAYTHATHA, Rasik H. ,  SAVARY, David Jean

IPC: A62D3/33 ,  B09B3/00 ,  A62D101/24

CPC classification number: A62D3/33 ,  A62D2101/08 ,  A62D2101/24 ,  A62D2101/43 ,  B01D53/508 ,  B01D53/64 ,  B01D53/80 ,  B01D53/83 ,  B01D53/8693 ,  B01D2251/304 ,  B01D2251/402 ,  B01D2251/404 ,  B01D2251/60 ,  B01D2251/602 ,  B01D2251/604 ,  B01D2251/606 ,  B01D2257/302 ,  B01D2257/60 ,  B01D2258/0283 ,  B09B3/0008 ,  B09B3/0041 ,  B09B2220/06 ,  C04B18/08 ,  C04B20/1085 ,  F23J15/003 ,  F23J2215/60 ,  Y02W30/92 ,  C04B20/023

Abstract: A treatment method for stabilizing at least a portion of at least one heavy metal contained in a sodic fly ash to reduce leachability, wherein the sodic fly ash is provided by a process whereby a sodium-based sorbent is injected in a combustion flue gas to remove pollutants therefrom. The treatment method comprises contacting the sodic fly ash with at least one water-soluble source of silicate and at least one additive comprising calcium and/or magnesium. The material obtained from the contacting step is preferably dried. The additive may be selected from the group consisting of lime kiln dust, fine limestone, quicklime, hydrated lime, dolomitic lime, dolomite, selectively calcined dolomite, hydrated dolomite, magnesium hydroxide, magnesium carbonate, magnesium oxide, and any mixture thereof. A particularly preferred additive comprises lime kiln dust and/or dolomitic lime. The heavy metal to be stabilized in the sodic fly ash may comprise selenium and/or arsenic.

Abstract translation: 一种用于稳定包含在钠粉煤灰中的至少一种重金属的至少一部分以降低浸出性的处理方法，其中通过将钠基吸附剂注入燃烧烟道气以去除 污染物。 该处理方法包括使钠粉煤灰与至少一种水溶性硅酸盐源和至少一种包含钙和/或镁的添加剂接触。 从接触步骤获得的材料优选干燥。 添加剂可选自石灰窑灰，细石灰石，生石灰，熟石灰，白云石，白云石，选择性煅烧白云石，水合白云石，氢氧化镁，碳酸镁，氧化镁及其任何混合物。 特别优选的添加剂包括石灰窑灰和/或白云石灰。 在钠粉中稳定的重金属可以包含硒和/或砷。

公开(公告)号：WO2015187781A2

公开(公告)日：2015-12-10

申请号：PCT/US2015/033905

申请日：2015-06-03

Applicant: SOLVAY SA

Inventor： ATWELL, Michael ,  RAYTHATHA, Rasik H.

IPC: F23J15/00 ,  F23J15/02

CPC classification number: F23J15/02 ,  A62D3/33 ,  B01D53/00 ,  B09B3/00 ,  B09B3/0008 ,  C04B18/08 ,  C04B20/1085 ,  Y02W30/92 ,  C04B20/023 ,  C04B14/26

Abstract: A treatment method for stabilizing a sodic fly ash to reduce their leachability which is provided by a combustion process when a sodium-based sorbent comes in contact with a flue gas generated by combustion to remove at least a portion of pollutants contained in the flue gas. The treatment method comprises contacting the sodic fly ash with at least one additive comprising calcium. The material obtained from the contacting step is preferably dried. The material may be selected from the group consisting of lime kiln, dust, fine limestone, quicklime, hydrated lime, dolomitic lime, dolomite, selectively calcined dolomite, hydrated dolomite, and any mixture of two or more thereof. A particularly preferred additive comprises lime kiln dust.

Abstract translation: 一种用于在钠基吸附剂与由燃烧产生的烟道气接触以除去烟道气中所含的至少一部分污染物的情况下，通过燃烧过程来提供的用于稳定苏打粉煤灰以降低其浸出性的处理方法。 该处理方法包括使钠粉与至少一种包含钙的添加剂接触。 从接触步骤获得的材料优选干燥。 该材料可选自石灰窑，灰尘，细石灰石，生石灰，熟石灰，白云石石灰，白云石，选择性煅烧白云石，水合白云石及其两种或多种的任何混合物。 特别优选的添加剂包括石灰窑灰尘。

公开(公告)号：WO2014086921A1

公开(公告)日：2014-06-12

申请号：PCT/EP2013/075651

申请日：2013-12-05

Applicant: SOLVAY SA

Inventor： RAYTHATHA, Rasik H. ,  SAVARY, David Jean Lucien

IPC: B09B3/00 ,  B01D53/73 ,  B01D53/81 ,  C22B7/02 ,  A62D101/24

CPC classification number: A62D3/33 ,  A62D2101/08 ,  A62D2101/24 ,  A62D2101/43 ,  B01D53/40 ,  B01D53/83 ,  B01D2251/304 ,  B01D2251/402 ,  B01D2257/204 ,  B01D2257/302 ,  B01D2257/404 ,  B09B3/0008 ,  B09B3/0041 ,  B09B2220/06

Abstract: A treatment method for reducing the leachability of selenium contained in a sodic fly ash which is provided by a combustion process when a sodium-based sorbent comes in contact with a flue gas generated by combustion to remove at least a portion of pollutants contained in the flue gas. The method comprises: (a) contacting the sodic fly ash with at least one additive in the presence of water; and (b) drying the material (preferably a paste) from step (a) to form a dried matter. The additive may comprise at least one strontium-containing compound, at least one barium-containing compound, dolomite, a dolomite derivative such as calcined or hydrated dolomite, at least one silicate-containing compound, or any combinations of two or more thereof. A particularly suitable additive may comprise strontium chloride, strontium hydroxide, pulverized dolomitic lime, sodium silicate, or any combinations of two or more thereof.

Abstract translation: 一种用于降低由钠基吸附剂与燃烧产生的烟道气接触的燃烧过程中所提供的钠液中的硒的浸出性的处理方法，以除去烟道中所含的至少一部分污染物 加油站。 该方法包括：（a）在水存在下使钠粉与至少一种添加剂接触; 和（b）从步骤（a）中干燥材料（优选糊状物）以形成干物质。 添加剂可以包含至少一种含锶化合物，至少一种含钡化合物，白云石，白云石衍生物如煅烧或水合白云石，至少一种含硅酸盐的化合物，或其两种或多种的任何组合。 特别合适的添加剂可以包括氯化锶，氢氧化锶，粉碎的白云石石灰，硅酸钠或其两种或更多种的任何组合。