US 9,809,506 B2
Hydrocarbon conversion to ethylene
Frank Hershkowitz, Basking Ridge, NJ (US); Paul F. Keusenkothen, Houston, TX (US); and Ian J. Laurenzi, Hampton, NJ (US)
Assigned to ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Filed on Oct. 17, 2016, as Appl. No. 15/294,898.
Application 15/294,898 is a division of application No. 14/942,287, filed on Nov. 16, 2015, granted, now 9,499,457.
Claims priority of provisional application 62/093,003, filed on Dec. 17, 2014.
Claims priority of application No. 15153727 (EP), filed on Feb. 4, 2015.
Prior Publication US 2017/0036971 A1, Feb. 9, 2017
Int. Cl. G05B 17/00 (2006.01); C07C 2/00 (2006.01); C07C 4/02 (2006.01); C07C 4/04 (2006.01); B01J 19/24 (2006.01); C07C 5/327 (2006.01); B01J 8/04 (2006.01); C07C 11/04 (2006.01); C10G 9/26 (2006.01); C07C 5/32 (2006.01)
CPC C07C 4/04 (2013.01) [B01J 8/04 (2013.01); B01J 8/0438 (2013.01); B01J 8/0496 (2013.01); B01J 19/24 (2013.01); B01J 19/2415 (2013.01); B01J 19/2485 (2013.01); C07C 5/32 (2013.01); C07C 5/327 (2013.01); C07C 11/04 (2013.01); C10G 9/26 (2013.01); B01J 2208/00513 (2013.01); B01J 2208/00548 (2013.01); B01J 2219/00076 (2013.01); B01J 2219/00087 (2013.01); B01J 2219/00164 (2013.01); B01J 2219/24 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A tubular, regenerative, reverse-flow thermal reactor for pyrolyzing hydrocarbon, the reactor comprising:
(a) first and second zones, and a reaction zone located between the first and second zones,
(b) first and second thermal masses, at least a portion of the first thermal mass being located in the first zone, and at least a portion of the second thermal mass being located in the second zone,
(c) at least one combustion feed conduit comprising a fuel channel and a separate oxidant channel, the feed conduit being adapted for introducing a combustion feed comprising a fuel and an oxidant into the reactor proximate to the first zone and conveying the combustion feed to the reaction zone, wherein the fuel and oxidant channels are located within the portion of the first thermal mass that is located in the first zone,
(d) at least one pyrolysis feed conduit for introducing a pyrolysis feed into the reactor proximate to the second zone and conveying pyrolysis feed to the reaction zone, and
(e) one or more valves for (i) establishing during a first time interval a flow of the combustion feed in a forward direction through the first zone to the reaction zone for combustion and (ii) establishing during a second time interval a flow of the pyrolysis feed in a reverse direction through the second zone to the reaction zone for the pyrolysis, wherein
the first zone is configured to transfer heat from the first thermal mass to the fuel and to the oxidant during the first time interval and to transfer heat from pyrolysis products to the first thermal mass during the second time interval,
the reaction zone is configured to combust the combustion feed during the first interval and to expose the pyrolysis feed to a peak pyrolysis temperature in the range of from 850° C. to 1200° C., at a hydrocarbon pressure ≧7 psia (0.48 bara), for a residence time ≤1.0 seconds during the second time interval, and
the second zone is configured to transfer heat from combustion products to the second thermal mass during the first time interval and to transfer heat from the second thermal mass to the pyrolysis feed during the second time interval.