Nova Patents
US1850286A

Process for making finely divided metal oxides

Abstract

This record has no abstract on file.

Term

Term ended

Expired 22 March 1949, 77.5 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

2 claims: 2 independent, 0 dependent

  1. 1
    We claim:1. The process of producing finely divided titanic oxid which comprises burning titanium chlorid distributed in an atmosphere of oxidizing gas in a flame produced by a gasified combustible matter.
  2. 2
    The process of producing finely divided titanic oxid which comprises burning titanium chlorid distributed in an atmosphere of oxidizing gas in a flame produced by purified coal gas. In testimony whereof we have hereunto set our hands. The subject matter of this application has been divided out and transferred hereto from our copending application Ser. No. 31,691, filed May 20th, 1925. It has been shown in the said patent application that oxids of metallic elements can be obtained in a state of extremely fine division by burning a volatilizable carbonyl alone or together with a volatilizable halide of a metallic element in the presence of a volatilizable or gaseous combustible matter. The term metallic element is intended to include metals such as iron, chromium, aluminium, titanium and others and also silicon which as an element has a metallic character. We have found that in a manner similar to the process described and claimed in our application Ser. No. 31,691 filed May 20th, 1925, oxids of metallic elements in a state of extremely fine division can be obtained by burning a volatile halide of a metallic element or mixtures of several such halides in the presence of a volatilizable or gaseous combustible matter, which combustible matter may be an inflammable gas or vapor and suitably mixed with the halide. The powders obtained by the process here described are valuable for many purposes. For example they may be used as a mineral pigment coloring matter, or as a polish, or as catalysts, or for the preparation of very finely divided metals, or the like. ——The process according to this invention is applicable for example to ferric chlorid, chromyl chlorid, aluminium chlorid, silicon., tatrachlorid, titanium chlorid or mixtures of such compounds, which may be brought into a I flame in a finely divided condition, into Lwhich flame, besides, nonvolatile powders i!l may be introduced for shading the product. For example, purified coal gas is loaded with titanium chlorid vapors and ignited in the air. Highly dispersed titanic oxid is produced which, owing to its high specific 4:5 volume, is carried along with the gas current co c.> ALWIN MITTASCH. RICHARD LUCAS. ROBERT GRIESSBACH.
Independent claims2