Abstract:
A method for packing and/or mixing particulate materials, e.g., aerogel particles, includes combining materials having different particle sizes and applying a negative pressure differential in the presence of a sound field. A negative pressure differential in the presence of vibration also can be used. The method increases mixing and packing density.
Abstract:
A process of producing a blanket is described and can involve forming an aqueous slurry of hydrophobic aerogels, fibers, and at least one wetting agent, drying the aqueous slurry to form a substantially dried product, and calendaring the substantially dried product to form the blanket. The blanket can be used in a variety of applications, including windows.
Abstract:
A mineral binder composition having incorporated therein a carbon black product comprising a carbon black having attached an organic group containing an ionic or an ionizable group.
Abstract:
Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbonate in air to convert the refractory metal values to MoO.sub.4.sup.=, VO.sub.4.sup..ident., WO.sub.4.sup.=, and CrO.sub.4.sup.= and the base metals to water insoluble oxides. A leach of the calcined materials produces a pregnant liquor rich in refractory metals which, after separation of the vanadium, molybdenum and tungsten values, is treated with CO, CHOO.sup.-, CH.sub.3 OH, or HCHO to reduce Cr.sup.+6 to Cr.sup.+3. The carbonate and bicarbonate salts produced as a byproduct of the reduction are recycled to the calcination stage.As a result of the V, W, and Mo partition, a mixed solid comprising CaO.nV.sub.2 O.sub.5, CaMoO.sub.4, and CaWO.sub.4 is produced. This is treated with carbonated water or formic acid to selectively dissolve vanadium values which are subsequently recovered by precipitation or extraction. The remaining mixed CaWO.sub.4 and CaMoO.sub.4 solid is treated with H.sub.2 O.sub.2 and sulfuric acid to reject a Mo and W-free CaSO.sub.4 precipitate, and to produce a concentrated solution of tungsten and molybdenum. The W values are selectively precipitated from this solution by decomposing the peroxy complexes. The process has the advantages that a wide variety of different feed materials can be treated, no energy intensive pyrometallurgy is involved, reagent consumption is minimized, and no aqueous effluents are produced.
Abstract:
Treated carbonaceous compositions comprising a carbonaceous material, preferably a carbon black, and an ester polymer treating agent. Also disclosed are polymer compositions incorporating the treated carbonaceous compositions and articles of manufacture formed from the polymer compositions.
Abstract:
An adsorbent composition containing a modified carbonaceous material capable of adsorbing an adsorbate is disclosed, wherein at least one organic group is attached to the carbonaceous material. Furthermore, methods to increase the adsorption capacity of a carbonaceous material capable of adsorbing an adsorbate and methods to adsorb an adsorbate using the above-described adsorbent composition are also disclosed.
Abstract:
A treated carbon black may be produced by treating carbon black with at least one polyethylene glycol having a molecular weight of from about 1,000 to about 1,000,000. The treated carbon black may be used in forming polymeric compositions, such as semi-conductive and insulating compounds, for example for use in electrical cables.
Abstract:
Binder compositions are provided which include a mineral binder and a silicon-containing carbon black. The silicon-containing carbon black can have attached an ionic or ionizable organic group or can be oxidized. Silicon-containing carbon blacks may be prepared by a furnace method. The binder compositions of the present invention have improved coloring and weathering properties in comparison to binder compositions prepared with conventional carbon blacks. Furthermore, the binder compositions that incorporate silicon-containing carbon blacks having ionic or ionizable organic groups attached exhibit excellent dispersibility, even in pelletized form. Articles such as roofing tiles can be prepared from the binder compositions. Also contemplated is a method of improving the color stability of a mineral binder composition. Silicon-containing carbon blacks as described above are added to the mineral binder composition.
Abstract:
The disclosure relates to carbon black pellets containing 10 to less than 48 weight % organic compound, formed by agglomerating a carbon black with an organic compound having specified characteristics. Also disclosed is the use of such pellets as a masterbatch or a concentrate.
Abstract:
Binder compositions are provided which include a mineral binder and a silicon-containing carbon black. The silicon-containing carbon black can have attached an ionic or ionizable organic group or can be oxidized. Silicon-containing carbon blacks may be prepared by a furnace method. The binder compositions of the present invention have improved coloring and weathering properties in comparison to binder compositions prepared with conventional carbon blacks. Furthermore, the binder compositions that incorporate silicon-containing carbon blacks having ionic or ionizable organic groups attached exhibit excellent dispersibility, even in pelletized form. Articles such as roofing tiles can be prepared from the binder compositions. Also contemplated is a method of improving the color stability of a mineral binder composition. Silicon-containing carbon blacks as described above are added to the mineral binder composition.