Upgrading Hydrocarbon Pyrolysis Products

摘要

The invention relates to a utility fluid, such as a fluid containing aromatic and non-aromatic ringed molecules, useful as a diluent when hydroprocessing pyrolysis tar, such as steam cracker tar. The specified utility fluid comprises ≧10.0 wt % aromatic and non-aromatic ring compounds and each of the following: (a) ≧1.0 wt % of 1.0 ring class compounds; (b) ≧5.0 wt % of 1.5 ring class compounds; (c) ≧5.0 wt % of 2.0 ring class compounds; and (d) ≦0.1 wt % of 5.0 ring class compounds. The invention also relates to methods for producing such a utility fluid and to processes for hydroprocessing pyrolysis tar.

主权项

1. A utility fluid for pyrolysis tar hydroprocessing, the utility fluid comprising ≧10.0 wt % aromatic and non-aromatic ring compounds and each of the following:
(a) ≧1.0 wt % of 1.0 ring class compounds which are compounds comprising only one moiety selected from the group consisting of
(i) one aromatic ring, and(ii) two non-aromatic rings; (b) ≧5.0 wt % of 1.5 ring class compounds which are compounds comprising only one moiety selected from the group consisting of
(i) one aromatic ring and one non-aromatic ring, and(ii) three non-aromatic rings; (c) ≧5.0 wt % of 2.0 ring class compounds which are compounds comprising only one moiety selected from the group consisting of
(i) two aromatic rings,(ii) one aromatic ring and two non-aromatic rings, and(iii) four non-aromatic rings; and (d) ≦0.1 wt % of 5.0 ring class compounds which are compounds comprising only one moiety selected from the group consisting of
(i) five aromatic rings,(ii) four aromatic rings and two non-aromatic rings,(iii) three aromatic rings and four non-aromatic rings,(iv) two aromatic rings and six non-aromatic rings,(v) one aromatic ring and eight non-aromatic rings and(vi) ten non-aromatic rings,where, in each case, the weight percents are based on the weight of the utility fluid.