The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1977
Filed:
Dec. 17, 1974
Applicant:
Inventors:
Han-Joachim Kotzsch, Rheinfelden, DT;
Hans-Joachim Vahlensieck, Wehr, Baden, DT;
Walter Josten, Rheinfelden, DT;
Assignee:
Dynamit Nobel Aktiengesellschaft, Troisdorf, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423342 ; 423341 ;
Abstract
An improvement in a process for preparing silicon tetrachloride or silicon trichloride wherein elemental silicon is contacted with hydrogen chloride in a fluidized bed, the improvement residing in carrying out the process in the presence of an iron compound, which iron compound is present in an amount such that when calculated as iron, the iron content is 10 to 43 weight percent based on the weight of the total solids in the fluidized bed, at a temperature in the range of 260.degree.-600.degree. C, preferably in the absence of an inert gas.