Hydrotreated hydrocarbon tar, fuel oil composition, and process for making

Abstract

Provided is a hydrocarbon tar. The tar has 75 wt % or more of aromatics of 10 carbons to 75 carbons based on the total weight of the tar. The aromatics exhibit 40% to 80% aromaticity. The tar has a boiling point of from 300° F. to 1350° F. There is also a fuel oil composition having the tar therein. There are also processes for making the hydrocarbon tar.

What is claimed is: 
     
         1 . A hydrocarbon tar, comprising: 75 wt % or more of aromatics of 10 carbons to 75 carbons based on the total weight of the tar, wherein the tar is of 40% to 80% aromaticity and a boiling point of from 300° F. to 1350° F. 
     
     
         2 . The tar of  claim 1 , wherein the tar has a sulfur concentration of 0.5 wt % or less. 
     
     
         3 . The tar of  claim 1 , wherein the hydrocarbon tar is of 50% to 65% aromaticity. 
     
     
         4 . The tar of  claim 1 , wherein the hydrocarbon tar is of 40% to 68% aromaticity. 
     
     
         5 . The tar of  claim 1 , wherein the hydrocarbon tar is of 50% to 70% aromaticity. 
     
     
         6 . The tar of  claim 1 , wherein density of the tar is 0.90 to 1.06 grams/cubic centimeter. 
     
     
         7 . The tar of  claim 1 , wherein viscosity of the tar is 40 centistokes to 400 centistokes at 40° C. 
     
     
         8 . The tar of  claim 1 , wherein viscosity of the tar is 100 centistokes to 400 centistokes at 40° C. 
     
     
         9 . The tar of  claim 1 , wherein the tar exhibits 100% solubility in 75 wt % toluene/25 wt % heptanes at 100° C. 
     
     
         10 . The tar of  claim 1 , wherein the tar exhibits a carbon residue of 0.3 wt % or less. 
     
     
         11 . The tar of  claim 1 , wherein the aromatics are of 25 carbons to 29 carbons. 
     
     
         12 . The tar of  claim 1 , wherein the aromatics are of 18 carbons to 23 carbons. 
     
     
         13 . A fuel oil composition, comprising: a blend of 10 wt % to 100 wt % of aromatics of 10 carbons to 75 carbons and 90 wt % to 0 wt % of non-aromatic hydrocarbons of 10 or more carbons, wherein the aromatics exhibit 40% to 80% aromaticity, wherein the aromatics and the non-aromatic hydrocarbons are 95 wt % or more of the total weight of the composition. 
     
     
         14 . The composition of  claim 13 , wherein the aromatics cs are of 40% to 68% aromnaticity. 
     
     
         15 . The composition of  claim 13 , wherein the composition has a sulfur concentration of 1.0 wt % or less. 
     
     
         16 . The composition of  claim 13 , wherein the aromatics are 10 wt % to 30 wt % and the hydrocarbons are 90 wt % to 70 wt % based on the total weight of the composition. 
     
     
         17 . The composition of  claim 13 , wherein the aromatics are of 25 carbons to 29 carbons. 
     
     
         18 . The composition of  claim 13 , wherein the aromatics and the hydrocarbons are 99 wt % or more of the total weight of the composition. 
     
     
         19 . A process for making a hydrogenated tar, comprising:
 a) refining a first stream of hydrocarbons in a vacuum or atmospheric distillation tower to produce a tower stream;   b) cracking the tower stream in a steam cracker to produce a cracker stream of 75 wt % or more of aromatics of 10 carbons to 75 carbons and 60% to 80% aromaticity based on the total weight of the tower stream; and   c) partially hydrogenating the cracker stream to form a hydrocarbon tar of an aromaticity of 40% to 80% and a boiling point of from 300° F. to 1350° F.   
     
     
         20 . The process of  claim 19 , further comprising blending into a second stream of non-aromatic hydrocarbons of 10 or more carbons the hydrocarbon tar to form a fuel oil composition. 
     
     
         21 . The process of  claim 19 , wherein the cracker stream is partially hydrogenated to form a hydrocarbon tar of an aromaticity of 40% to 68%. 
     
     
         22 . A process for making a hydrocarbon tar, comprising:
 a) refining a crude oil or a natural gas liquid stream to produce an aromatic stream of at 75 wt % or more of aromatics of 10 carbons to 75 carbons and 60% to 80% aromaticity based on the total weight of the composition;   b) partially hydrogenating the aromatic stream to form a hydrocarbon tar of an aromaticity of 40% to 80% and a boiling point of from 300° F. to 1350° F.   
     
     
         23 . The process of  claim 22 , further comprising: blending 10 wt % to 95 wt % of the hydrocarbon tar into 90 wt % to 5 wt % of a stream of non-aromatic hydrocarbons of 10 or more carbons to form a fuel oil composition based on the total weight of the composition, wherein the aromatic stream and the hydrocarbon stream together are 95 wt % or more of the total weight of the fuel oil composition. 
     
     
         24 . The process of  claim 22 , wherein the aromatic stream is partially hydrogenated to form a hydrocarbon tar of an aromaticity of 40% to 68%.