公开(公告)号：US20170113085A1

公开(公告)日：2017-04-27

申请号：US15315860

申请日：2015-06-03

Applicant: SOLVAY SA

Inventor： Rasik H. RAYTHATHA

IPC: A62D3/33 ,  B01D53/83 ,  F23J15/00 ,  B01D53/78 ,  B09B3/00 ,  B01D53/40 ,  B01D53/64

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.

公开(公告)号：US20170100618A1

公开(公告)日：2017-04-13

申请号：US15315858

申请日：2015-06-03

Applicant: SOLVAY SA

Inventor： Rasik H. RAYTHATHA ,  David Jean Lucien SAVARY

IPC: A62D3/33 ,  F23J15/00 ,  B01D53/80 ,  B09B3/00 ,  B01D53/50 ,  B01D53/64

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.

公开(公告)号：US20170089573A1

公开(公告)日：2017-03-30

申请号：US15315863

申请日：2015-06-03

Applicant: SOLVAY SA

Inventor： Michael ATWELL ,  Rasik H. RAYTHATHA

IPC: F23J15/02 ,  A62D3/33

CPC classification number: F23J15/02 ,  A62D3/33 ,  B01D53/00 ,  B01D53/508 ,  B01D53/64 ,  B01D53/685 ,  B01D53/73 ,  B01D53/83 ,  B01D2251/304 ,  B01D2251/404 ,  B01D2251/606 ,  B01D2251/608 ,  B01D2257/2045 ,  B01D2257/2047 ,  B01D2257/302 ,  B01D2258/0283 ,  B01D2259/128 ,  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.

公开(公告)号：US20150314155A1

公开(公告)日：2015-11-05

申请号：US14646546

申请日：2013-12-05

Applicant: SOLVAY SA

Inventor： Rasik H. RAYTHATHA ,  David Jean Lucien SAVARY

IPC: A62D3/33 ,  B09B3/00

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。