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a technology of titanium alloys and titanium halides, which is applied in the direction of improving process efficiency, etc., can solve the problems of uncontrollable and sporadic reaction, uncontrolled reaction, and contamination opportunities, and achieve the effect of capital and operating costs
Inactive Publication Date: 2008-08-07
CRISTAL US INC
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[0008]Accordingly, an object of the present invention is to provide a method and system for producing non-metals or metals or
Problems solved by technology
However, current commercial methods use batch processing which requires significant material handling with resulting opportunities for contamination and gives quality variation from batch to batch.
For both processes, the reaction is uncontrolled and sporadic and promotes the growth of dendritic titanium metal.
The processing of the titanium sponge into a usable form is difficult, labor intensive, and increases the product cost by a factor of two to three.
The processes discu
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[0022]The process of the invention may be practiced with the use of any alkali or alkaline earth metal depending upon the metal or non-metal to be reduced. In some cases, combinations of an alkali or alkaline earth metals may be used. Moreover, any halide or combinations of halides may be used with the present invention although in most circumstances chlorine, being the cheapest and most readily available, is preferred. Of the alkali or alkaline earth metals, by way of example, sodium will be chosen not for purposes of limitation but merely purposes of illustration, because it is cheapest and preferred, as has chlorine been chosen for the same purpose.
[0023]Regarding the non-metals or metals to be reduced, it is possible to reduce a single metal such as titanium or tantalum or zirconium, selected from the list set forth hereafter. It is also possible to make alloys of a predetermined composition by providing mixed metal halides at the beginning of the process in the required molecul...
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Abstract
A titanium powder or alloy powder produced by introducing a TiCl4 vapor into a continuum or flowing stream of sodium metal at a velocity not less than sonic velocity of the vapor wherein the sodium is present in an amount greater than stoichiometric sufficient to maintain substantially all the reaction products below the sintering temperature thereof and wherein said Ti powder has a packing fraction in the range of from about 4% to about 11%. The powders without fines have a particle diameter in the range of from about 3.3 to about 1.3 microns based on a calculated size of a sphere from a BET surface area in the range of from about 0.4 to about 1.0 m2/g.
Description
RELATED APPLICATIONS[0001]This application is a continuation of Ser. No. 08 / 691,423 filed Aug. 2, 1995, now U.S. Pat. No. 5,797,761 and this application is a continuation of the file wrapper continuation application of our previously filed co-pending application Ser. No. 09 / 264,577 filed Mar. 8, 1999, now U.S. Pat. No. 6,409,979 issued Jul. 25, 2002, which was a continuation-in-part of Ser. No. 08 / 782,816, filed Jan. 13, 1997, now U.S. Pat. No. 5,958,106 issued Sep. 28, 1999, which was a continuation-in-part of Ser. No. 08 / 691,423, filed Aug. 2, 1995, now U.S. Pat. No. 5,779,761 issued Jul. 14, 1998. The disclosures of each of U.S. Pat. Nos. 5,779,761 and 5,958,106 are incorporated by reference.BACKGROUND OF THE INVENTION[0002]This invention relates to the production of elemental material from the halides thereof and has particular applicability to those metals and non-metals for which the reduction of the halide to the element is exothermic. Particular interest exists for titanium ...
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