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:
Sep. 06, 1977
Filed:
May. 07, 1976
Werner Heimberger, Hanau, DT;
Gerd Schreyer, Hanau, DT;
Deutsche Gold- und Silber-Scheideanstalt vormals Roessler, Frankfurt, DT;
Abstract
Cyanogen chloride or cyanogen bromide is prepared by reaction of hydrogen cyanide with hydrogen chloride or hydrochloric acid (or hydrogen bromide or hydrobromic acid) and hydrogen peroxide in aqueous medium in the presence of cupric and ferric ions under superatmospheric pressure, preferably between 1.5 and 16 bar, and the cyanogen chloride (or cyanogen bromide) recovered separated from oxygen and nitrogen. In a preferred form of the invention, the hydrogen chloride or hydrochloric acid is either partially or entirely formed directly in the recycling catalyst solution of cupric and ferric ions by reaction of chlorine and hydrogen cyanide, either with or without pressure.