US 9,809,756 B2
Upgrading pyrolysis tar
Nikolaos Soultanidis, Houston, TX (US); Keith G. Reed, Houston, TX (US); Teng Xu, Houston, TX (US); David T. Ferrughelli, Flemington, NJ (US); and Luc R. M. Martens, Meise (BE)
Assigned to ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Filed on Apr. 3, 2015, as Appl. No. 14/678,427.
Claims priority of provisional application 62/005,679, filed on May 30, 2014.
Claims priority of application No. 14181260 (EP), filed on Aug. 18, 2014.
Prior Publication US 2015/0344785 A1, Dec. 3, 2015
Int. Cl. C10C 1/20 (2006.01); C10G 45/72 (2006.01); C10G 47/36 (2006.01); C10G 49/00 (2006.01); C10G 49/26 (2006.01); C10G 75/04 (2006.01)
CPC C10C 1/205 (2013.01) [C10G 45/72 (2013.01); C10G 47/36 (2013.01); C10G 49/002 (2013.01); C10G 49/26 (2013.01); C10G 75/04 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A pyrolysis tar upgrading process, the process comprising:
(a) providing at least
(i) a reactor zone, the reactor zone containing catalyst;
(ii) a utility fluid, the utility fluid comprising ≧90.0 wt. % of aromatics and ≤10.0 wt. % of paraffin;
(iii) a pyrolysis tar;
(iv) an activating fluid, wherein
(A) the activating fluid comprises carrier fluid and ≧5.0 wt. % of at least one activator,
(B) the carrier fluid comprises ≧90.0 wt. % of paraffin and ≤10.0 wt. % of aromatics, and
(v) a treat gas, wherein the treat gas comprises ≧50.0 vol. % of molecular hydrogen;
(b) contacting the treat gas and the activating fluid with the catalyst in the reactor zone under catalyst activation conditions, the catalyst activation conditions including an LHSV ≧0.01 m3 of activating fluid per m3 of the catalyst;
(c) decreasing the activating fluid LHSV to <0.01 m3 of activating fluid per m3 of the catalyst and then contacting the utility fluid with the catalyst in the reactor at a utility fluid LHSV ≧0.1 m3 of utility fluid per m3 of the catalyst;
(d) transferring the pyrolysis tar to the reactor and contacting the pyrolysis tar, treat gas, and utility fluid with the catalyst under conversion conditions to produce a conversion product, the conversion conditions including
(i) an LHSV ≧0.1 m3 of (pyrolysis tar+utility fluid) per m3 of the catalyst,
(ii) a temperature ≧100° C. and a pressure ≧34 bar(g), and
(iii) a utility fluid:pyrolysis tar weight ratio in the range of from about 0.05 to about 4.0,
(e) separating a hydroprocessed product from the conversion product; and
(f) substituting at least a portion of the separated hydroprocessed product for at least a portion of the utility fluid during step (d) to achieve a [(substituted hydroprocessed product+utility fluid):pyrolysis tar] weight ratio in the range of from about 0.05 to about 4.0.