Cabot Corporation

About: Cabot Corporation is a company organization based out in Boston, Massachusetts, United States. It is known for research contribution in the topics: Carbon black & Carbon. The organization has 1279 authors who have published 1399 publications receiving 36736 citations.

Process for partitioning Mo and W from a mixed CaMoO4 -CaWO4 precipitate

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 MoO4.sup.═, VO4.sup..tbd., WO4.sup.═, and CrO4.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-, CH3 OH, or HCHO to reduce Cr+6 to Cr+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.nV2 O5, CaMoO4, and CaWO4 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 CaWO4 and CaMoO4 solid is treated with H2 O2 and sulfuric acid to reject a Mo and W-free CaSO4 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.

The use of modified carbon black in gas-phase polymerizations

Abstract: A process for the production of a polymer is disclosed wherein the polymerization occurs in a fluidized bed reactor or a reactor for the gas-phase production of a polymer and in the presence of a catalyst and a modified carbon black. Also disclosed are the polymer particles resulting from this process of the present invention and products made from the polymer particles of the present invention including hoses, such as radiator hoses, tires, and roofing material.

Method of bonding sputtering target materials

Abstract: A method of forming a sputtering target is described that involves bonding a backing plate onto a casement having one or more recesses that contain target material to form a bonded target. During the bonding process, the bonded target is optionally vacuum sealed within the recess. The bonded target is then optionally annealed while under vacuum to form an annealed sputtering target. The sputtering target can then be retrieved by removing at least a portion of the casement from the sputtering target in one or several steps. Also described is a casement having one or more recesses containing bonded target material that is optionally vacuum sealed in the casement. The casement, as well as the backing plate that is optionally bonded onto the casement, are further described as well as other options and methods.

A method for quantifying the texture homogeneity of a polycrystalline material

Abstract: A method for quantifying the texture homogeneity of a polycrystalline material is described. The method involves selecting a reference pole orientation; scanning in increments a cross-section of the polycrystalline material having a thickness with scanning orientation imaging microscopy or other measuring technique to obtain actual pole orientations of a multiplicity of grains throughout the cross-section of the polycrystalline material. The orientation differences between the reference pole orientation and actual pole orientations of a multiplicity of grains is then determined. A value of misorientation from the reference pole orientation at each grain measured throughout the thickness is then assigned. The average misorientation of each measured increment throughout the thickness is then determined. A texture gradient and/or texture banding can then be obtained by determining the first and/or second derivative, respectively, of the average misorientation of each measured increment through the thickness of the sample used for evaluation. A method to predict the sputtering efficiency of a target is also described as well as a system for quantifying the texture homogeneity of a polycrystalline material.

Elastomer composite with silica-containing filler and methods to produce same

Abstract: An elastomer composite with silica-containing filler is described, along with methods to make the same. The advantages achieved with the elastomer composite and methods are further described.