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:
Jul. 29, 2014
Filed:
Mar. 28, 2012
Applicants:
Grazyna Petela, Calgary, CA;
Leslie Wilfred Benum, Red Deer, CA;
Inventors:
Grazyna Petela, Calgary, CA;
Leslie Wilfred Benum, Red Deer, CA;
Assignee:
Nova Chemicals (International) S. A., Fribourg, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 19/00 (2006.01); C07C 4/02 (2006.01); C10G 9/20 (2006.01); B01J 19/24 (2006.01); B01J 19/02 (2006.01);
U.S. Cl.
CPC ...
C10G 9/20 (2013.01); C10G 9/203 (2013.01); B01J 19/2415 (2013.01); B01J 19/0013 (2013.01); B01J 19/02 (2013.01); B01J 2219/00087 (2013.01); C10G 2300/1044 (2013.01); C10G 2300/1081 (2013.01); C10G 2400/20 (2013.01); Y10S 585/92 (2013.01); Y10S 585/922 (2013.01); Y10S 585/924 (2013.01); Y10S 585/925 (2013.01); Y10S 585/926 (2013.01);
Abstract
The efficiency of heat transfer to a furnace tube or coil in a furnace for cracking ethane, propane or naphtha feedstocks, or a mixture thereof may be improved by providing protuberances on the surface of the tube or coil having i) a maximum height from 3 to 15% of the coil outer diameter, ii) a contact surface with a coil, or a base, which area is 0.1%-10% of the coil external cross section area, and iii) a geometrical shape which has a relatively large external surface containing a relatively small volume.