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:
Dec. 02, 2008
Filed:
Oct. 28, 2004
Daniel E. Resasco, Norman, OK (US);
Boonyarach Kitiyanan, Pantunwan, TH;
Walter E. Alvarez, Norman, OK (US);
Leandro Balzano, Norman, OK (US);
Daniel E. Resasco, Norman, OK (US);
Boonyarach Kitiyanan, Pantunwan, TH;
Walter E. Alvarez, Norman, OK (US);
Leandro Balzano, Norman, OK (US);
The Board of Regents of the University of Oklahoma, Norman, OK (US);
Abstract
A process and apparatus for catalytic production of single walled carbon nanotubes. Catalytic particles are exposed to different process conditions at successive stages wherein the catalytic particles do not come in contact with reactive (catalytic) gases until preferred process conditions have been attained, thereby controlling the quantity and form of carbon nanotubes produced. The reaction gas is preferably provided at a high space velocity to minimize CObuild-up. The process also contemplates processes and apparatus which recycle and reuse the gases and catalytic particulate materials, thereby maximizing cost efficiency, reducing wastes, reducing the need for additional raw materials, and producing the carbon nanotubes, especially SWNTs, in greater quantities and for lower costs.