Exxonmobil Chemical Patents Inc.

Keith G Reed

Teng Xu

David T Ferrughelli

Luc R M Martens

Nikolaos Soultanidis

Stephen Harold Brown

John Scott Buchanan

James Harding Beech, Jr

Stephen M Davis

Frank C Wang

James H Beech

S Mark Davis

Christopher M Evans

Cathleen Yung

Ananthakrishnan Bhasker

The invention relates to pyrolysis tar upgrading processes, and in particular for decreasing reactor pressure drop when the upgrading includes converting pyrolysis tar in a reactor. The invention also relates to upgraded pyrolysis tar, and the use of upgraded pyrolysis tar, e.g., as a fuel oil blending component.

Upgrading pyrolysis tar

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 &#x2267;10.0 wt % aromatic and non-aromatic ring compounds and each of the following: (a) &#x2267;1.0 wt % of 1.0 ring class compounds; (b) &#x2267;5.0 wt % of 1.5 ring class compounds; (c) &#x2267;5.0 wt % of 2.0 ring class compounds; and (d) &#x2266;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.

Upgrading hydrocarbon pyrolysis products

The invention relates to upgraded pyrolysis products, hydroconversion processes for upgrading products obtained from hydrocarbon pyrolysis, equipment useful for such processes. In particular the invention provides methods for reducing coke fouling in such equipment.

Preheating feeds to hydrocarbon pyrolysis products hydroprocessing

The invention relates to upgraded pyrolysis products, processes for upgrading products obtained from hydrocarbon pyrolysis, equipment useful for such processes, and the use of upgraded pyrolysis products.

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Houston, TX, United States of America

Keith G Reed