US 9,809,767 B2
NOx removal method
Larry L. Iaccino, Seabrook, TX (US); Michael Moran, Humble, TX (US); and Silvio Carrettin, Kraainem (BE)
Assigned to ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Appl. No. 14/434,243
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
PCT Filed Nov. 7, 2013, PCT No. PCT/US2013/068831
§ 371(c)(1), (2) Date Apr. 8, 2015,
PCT Pub. No. WO2014/078153, PCT Pub. Date May 22, 2014.
Claims priority of provisional application 61/726,796, filed on Nov. 15, 2012.
Claims priority of application No. 13151521 (EP), filed on Jan. 16, 2013.
Prior Publication US 2015/0267131 A1, Sep. 24, 2015
Int. Cl. C10G 45/00 (2006.01); C07C 5/327 (2006.01); C10G 11/00 (2006.01); C10G 70/02 (2006.01); C10G 70/04 (2006.01); C01B 3/50 (2006.01); B01D 53/04 (2006.01); C10G 70/00 (2006.01); F25J 3/06 (2006.01); F25J 3/02 (2006.01); B01D 53/56 (2006.01); B01D 53/047 (2006.01); B01D 53/14 (2006.01); B01D 53/26 (2006.01)
CPC C10G 70/046 (2013.01) [B01D 53/04 (2013.01); B01D 53/26 (2013.01); B01D 53/56 (2013.01); B01D 53/565 (2013.01); C01B 3/50 (2013.01); C07C 5/327 (2013.01); C10G 11/00 (2013.01); C10G 45/00 (2013.01); C10G 70/00 (2013.01); C10G 70/02 (2013.01); C10G 70/043 (2013.01); C10G 70/047 (2013.01); F25J 3/0223 (2013.01); F25J 3/0233 (2013.01); F25J 3/0238 (2013.01); F25J 3/0252 (2013.01); F25J 3/064 (2013.01); F25J 3/0625 (2013.01); F25J 3/0635 (2013.01); F25J 3/0655 (2013.01); B01D 53/047 (2013.01); B01D 53/0462 (2013.01); B01D 53/1456 (2013.01); B01D 53/261 (2013.01); B01D 2257/40 (2013.01); B01D 2257/80 (2013.01); B01D 2259/402 (2013.01); B01D 2259/40088 (2013.01); B01D 2259/416 (2013.01); C01B 2203/048 (2013.01); C01B 2203/0465 (2013.01); F25J 2205/04 (2013.01); F25J 2205/60 (2013.01); F25J 2205/66 (2013.01); F25J 2210/12 (2013.01); F25J 2215/62 (2013.01); F25J 2220/02 (2013.01); F25J 2270/04 (2013.01); Y02P 30/464 (2015.11)] 24 Claims
OG exemplary drawing
 
1. A separation process, comprising:
(a) providing a first stream, the first stream comprising ≧1.0 wt. % methane, ≧1.0 wt. % molecular hydrogen, and ≧2.0 ppbw of NOx, the weight percents being based on the weight of the first stream;
(b) producing an upgraded first stream by exposing the first stream during a first time interval to a first removal agent to remove ≧50.0 wt. % of the first stream's NOx, based on the weight of the stream's NOx, wherein the first stream contacts the first removal agent at a space velocity (GHSV)≧2.5×104 hr−1, and wherein the upgraded first stream comprises <3 ppbw of NOx;
(c) during a second time interval following the first time interval at least partially regenerating the first removal agent;
(d) exposing the upgraded first stream to a temperature sufficient to condense at least a portion of the first stream's methane;
(e) conducting away a second stream, the second stream comprising at least a portion of the condensed methane; and
(f) conducting away a third stream, the third stream comprising at least a portion of the upgraded first stream's molecular hydrogen.
 
10. A hydrocarbon upgrading process, comprising:
(a) providing a first stream comprising ≧10.0 wt. % methane, ≧1.0 wt. % of molecular hydrogen, ≧2.0 ppbw of NOx, the weight percents being based on the weight of the first stream, and ≧0.05 mole % of water per mole of the first stream; and
(b) during a first time interval exposing the first stream to (i) a second removal agent to remove ≧50.0 wt. % of the first stream's water based on the weight of the first stream's water and (ii) to a first removal agent to remove ≧50.0 wt. % of the first stream's NOx based on the weight of the mixture's NOx to produce a first upgraded mixture, wherein the first stream contacts the first removal agent at a space velocity (GHSV)≧2.5×104 hr−1, and wherein the upgraded first stream comprises <3 ppbw of NOx.