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. 31, 1976
Filed:
Jan. 30, 1975
Applicant:
Inventors:
Peter Maruhnic, Pennington, NJ (US);
Ronald Howard Wolk, San Jose, CA (US);
Carmine A Battista, Fairless Hills, PA (US);
Assignee:
Hydrocarbon Research, Inc., Morristown, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C09C / ;
U.S. Cl.
CPC ...
423461 ; 423449 ; 423109 ;
Abstract
Carbon black is recovered from vulcanized waste rubber such as automobile tires or other articles by reacting pieces of the rubber with an aromatic oil solvent in a stirred reactor at 500.degree.-700.degree.F temperature and about 25-100 psig pressure for 0.5-2 hours residence time. The resulting solids-liquid mixture is processed to remove solids, and the resulting solid product is then dried, screened and chemically treated to recover the carbon black in dry powder form. The remaining solvent oil is also recovered and a portion reused in the process.