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:
Mar. 06, 1984
Filed:
May. 07, 1982
Applicant:
Inventors:
Reinhold Reck, Maintal, DE;
Gerhard Kuhner, Hanau, DE;
Manfred Voll, Erlensee, DE;
Peter Kleinschmit, Hanau, DE;
Assignee:
Degussa Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ; C09C / ;
U.S. Cl.
CPC ...
423461 ; 423445 ; 423449 ; 423460 ; 106307 ;
Abstract
A process for removing extractables from carbon blacks in a fluidized bed, wherein low extractable carbon blacks are treated under relatively mild temperature conditions (320.degree. C.) with an oxygen containing gas and high extractable carbon blacks are treated first at 100.degree.-320.degree. C. with steam and then at 200.degree.-500.degree. C. with an oxygen containing gas. A definition of classification in the 'low extractable' and 'high extractable' categories is given.