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:
Feb. 22, 1977
Filed:
Nov. 14, 1973
Walter Deucker, Neuenhain, Taunus, DT;
Ernst Spietschka, Oberauroff, Taunus, DT;
Dieter Steidl, Sulzbach, Taunus, DT;
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Abstract
A continuous process for preparing copper phthalocyanines by caking a mixture of phthalodinitrile, and a copper salt which comprises carrying out the reaction in a continuously working, heatable, tubular vibration mill, which contains iron or steel bars in the grinding room. In comparison with the continuous processes hitherto known this process requires a considerably smaller amount of thermal energy from outside, since the amount of heat formed in the strongly exothermic condensation process is, to a considerable extent conducted away from the reaction zone, with the aid of heat-conducting grinding bars, and is used in order to heat up the freshly introduced starting product to room temperature.