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.

Method of forming sputtering acticles by multidirectional deformation

Abstract: A method of producing a valve metal mill form having dimensions sufficient to be divided to form a plurality of sputter targets is described. The method includes multidirectional deformation of an ingot to form a mill form having a preferred average grain size of about 100 microns or less and/or a texture substantially void of textural bands.

Recovery of metal values from process residues

Abstract: A process for recovering metal (17) and acid values (48) from a source material (22) containing metallic fluorides comprises digesting (10) the source material in sulfuric acid (20) to form a slurry, separating (12) a fluoride containing solid phase (39) and a metal containing first liquid phase (26). The solid phase is subjected to pyrohydrolysis (14), sulfuric (40) and hydrofluoric acids (42) are recovered, and the first liquid phase is processed to recover the metal values by solvent extraction (16) or ion exchanges (18). The tantalum values are extracted from the first liquid aqueous phase by a water immiscible organic extractant such as methylisobutyl ketone to form a first liquid organic phase containing tantalum and a second liquid aqueous phase. The tantalum is stripped from the first organic phase using water (33). The process includes the additional steps of heating the separated solid phase from about ambient temperature to an elevated temperature in the presence of water vapor to evolve sulfuric acid (44) and render the gangue chemically inert (52). When the source material contains uranium the digestion step reduces the amount of gangue present in the radioactive source. The process can include the additional steps of removing uranium (34) from the second liquid aqueous phase by either an ion exchange resin or by solvent extraction using a water immiscible organic extractant to yield a uranium depleted aqueous phase (50) which can be treated with an aqueous solution of calcium oxide (66). Sulfuric acid and the organic extractant for extracting uranium can be recycled if desired (20).

Modified pigment products and black matrixes comprising same

Abstract: The present invention describes modified pigment products comprising a pigment having attached at least one photopolymerizable group and at least one ionic or ionizable group. Dispersions, black matrixes, and resin compositions comprising these modified pigment products are also disclosed.

Cylindrical metal fibers made from tantalum, columbium, and alloys thereof

Abstract: A method of making a tantalum capacitor of improved specific capacitance (and volumetric efficiency) is described. Short tantalum fibers are precipitated out of a carrier liquid to form a felt, or tumbled to form fiber containing particles, and in either case subsequently bonded so as to form a felt or particles containing the fibers in random orientation in substantially non-aligned array. These particles or felt are heated to bond the fibers together, purify and (optionally) cylindricalize them. The felt or particles can be processed in conventional fashion thereafter to form the capacitor. Cylindricalized fibers and pellets of increased surface area are also described.