Abstract: The present invention relates to calcium hydroxide particles having a total pore volume greater than 0.18 cm3/g, said total pore volume being calculated with the BJH method for a range of pores having a diameter of between 20 and 1000 ?, said particles being characterized in that the BJH partial pore volume for the range of pores having a diameter of between 20 and 100 ? corresponds to more than 20% of said BJH total pore volume.

Abstract: The present invention relates to calcium hydroxide particles having a total pore volume greater than 0.18 cm3/g, said total pore volume being calculated with the BJH method for a range of pores having a diameter of between 20 and 1000 ?, said particles being characterized in that the BJH partial pore volume for the range of pores having a diameter of between 20 and 100 ? corresponds to more than 20% of said BJH total pore volume.

Abstract: The present invention is related to a method for the removal of noxious components from a gas stream wherein an absorbent composition comprising one or more double salts is contacted with said gas stream at a temperature comprised between 100 and 400° C.

Abstract: The present invention relates to a capture agent for the treatment of gases, having an active phase that comprises a calcium silicate hydrate of (CaO)x(SiO2)y(H2O)z type with a Ca/Si molar ratio between 1.55 and 1.72, preferably between 1.65 and 1,72 and an H2O/Ca molar ratio between 1 and 1.4, preferably between 1.1 and 1.3, “z” being between 0.3 and 0.8, the capture agent having a specific surface area greater than 120 m2/g, preferably greater than 150 m2/g and particularly preferably greater than 200 m2/g and a pore volume greater than 0.4 cm3/g, preferably greater than 0.6 cm3/g and particularly preferably greater than 0.8 cm3/g.

Abstract: A hydrated lime, especially suited for removal of acid gases, such as SO3, from flue gases, is produced by the method of hydrating quicklime while controlling the temperature increase of the reaction, caused by the hydration reaction of the quicklime with water, sufficient to form a hydrated lime having a high pore volume of between about 0.1 to 0.25 cm3/g and a specific surface area of between about 20 to 50 m2/g, and then drying the resultant hydrated lime by indirect heating to provide a residual water content of less than 2.0 weight percent of the hydrated lime product.

Abstract: A method and powder mixture are described for cutting a refractory body. The powder mixture comprises refractory metal oxide particles and fuel particles which burn exothermically by combining with oxygen to form a refractory oxide. The mixture is characterised in that the refractory metal oxide of the powder mixture comprises calcium oxide and/or magnesium oxide. The powder mixture enables refractory bodies to be cut more effectively than hitherto.

Abstract: A process for producing a crystalline siliceous refractory mass includes providing particulate constituents to be projected comprised of (1) solid refractory particles comprising silica in the form of vitreous silica, and (2) solid combustible particles comprising silicon particles; projecting the particulate constituents with gaseous oxygen against a surface under ceramic welding conditions effective to cause a reaction between the solid combustible particles and the gaseous oxygen to occur against the surface, thereby releasing the heat of reaction against the surface so that a coherent refractory mass comprising cristobalite is formed, wherein the surface against which the solid refractory particles are projected is at a temperature of at least 1000.degree. C. The process can be used to manufacture refractory bricks or blocks, to repair furnaces, or to repair worn surfaces of a siliceous refractory material.

Abstract: A method of repairing an oxide-based refractory body by projecting a powder mixture against a hot surface of the body and in the presence of oxygen to provide a refractory repair mass includes providing a powder mixture composed of particles of at least one refractory oxide; fuel particles which react in an exothermic manner with the oxygen to form a refractory oxide and which are particles composed of at least one element selected from the group consisting of magnesium, aluminum, silicon, and mixtures thereof; and particles of silicon carbide present in an amount which is effective to provide a reduced porosity of the refractory repair mass and which does not exceed 10% by weight based on the weight of the powder mixture; and projecting the powder mixture against a hot surface of the oxide-based refractory body and in the presence of oxygen. Preferably, the powder mixture contains at least 1%, most preferably from 1 to 5%, by weight of the particles of silicon carbide.

Abstract: A reflective article such as a mirror or an energy-screening transparent panel comprises a reflective metal coating deposited on a glass substrate. The metal coating comprises a reflective layer of silver and has been treated with a solution containing ions of at least one of the group consisting of: Cr (II); V (II or III); Ti (III or II); Fe (II); In (I or II); Cu (I); and Al (III). Such a treatment affords protection of the reflective coating against corrosion.

Abstract: A reflective article such as a mirror or an energy-screening transparent panel comprises a reflective metal coating deposited on a glass substrate. The metal coating comprises a reflective layer of silver and has been treated with a solution containing ions of at least one of the group consisting of: Cr(II); V(II or III); Ti(III or II); Fe(II); In(I or II); Cu(I); and Al(III). Such a treatment affords protection of the reflective coating against corrosion.

Abstract: A reflective article includes a glass substrate and a reflective metal coating deposited on the glass substrate including a reflective layer of silver and having a surface stratum which has a population of tin atoms which is augmented as compared with the population of tin atoms (if any) in an underlying subsurface stratum by at least one tin atom per hundred metal atoms thereby conferring on the reflective metal coating an enhanced resistance to corrosion. The reflective layer of silver is treated with an acidified aqueous solution of a stannous salt, which solution is free from opalescence, thereby to augment tin atom population in a surface stratum of the reflective metal coating.

Abstract: A mirror comprises a transparent glass sheet having a reflective metal coating deposited on the glass and a protective coating applied to the reflective coating. The protective coating comprises a paint having a residual internal stress S.sub.R equal to or less than 1 MPa, measured by the Cantilever method (as defined) at a temperature above its glass transition temperature. One suitable paint used in coating the mirror has the following composition:50% pigments:10% titanium dioxide45% barium sulphate25% talc15% lead pigment5% coloring pigment and carbon black15% binder100% epoxy resin ester with 45% castor oil35% solvents5% butanol and isobutanol95% xylene.The glass transition temperature of the paint is approximately 10.degree. C., the residual internal stress at 20.degree. C. is approximately 0.05 MPa and the Persoz hardness is approximately 120.

Abstract: A decorative mirror, including a transparent sheet; and at least one reflective silver layer comprised of silver deposited on one face of the transparent sheet, wherein a first silver layer of said at least one reflective silver layer has randomly distributed therein areas containing reaction products including non-metallic silver formed by reacting at least a part of the silver of said first silver layer with a substance which reacts with silver to provide reaction products including non-metallic silver so that the visible light reflectance of the decorative mirror is modified or interrupted.

Abstract: A decorative mirror having a reflective silver layer deposited on a transparent sheet. A substance which reacts with silver is applied to the silver layer to create randomly distributed areas containing reaction products including non-metallic silver where the visible light reflectance of the mirror is modified or interrupted. In order to manufacture the mirror, a transparent sheet is wetted with a silvering solution to form a reflective silver layer, and while the sheet is still wet with the silvering solution the sheet is contacted with randomly distributed droplets of a solution of a substance which reacts with silver, the two solutions being made up using different solvents. The substance which reacts with silver may be a tin compound in an alcoholic solution, the silvering being effected with an aqueous solution. The silver layer whose reflective properties have been modified may be overcoated with a second silver layer, and the whole protected with further layers, for example of copper and paint.