Improved coal-tar pitch composition

Claim 1

AN IMPROVED COAL-TAR PITCH COMPOSITION CONSISTING SOLELY OF COAL-TAR DERIVED PRODUCTS, SAID COMPOSITIONS CONSISTING ESSENTIALLY OF A HOMOGENEOUS BLEND OF (1) BETWEEEN ABOUT 20% AND ABOUT 80% BY WEIGHT OF A COALTAR PITCH HAVING A RING AND BALL SOFTENING POINT BETWEEN ABOUT 50*C. AND ABOUT 8/*C. AND (2) BETWEEN ABOUT 80% AND ABOUT 20% BY WEIGHT OF A PITCH-LIKE RESIDUE OBTAINED BY CONTACTING, WITH AN OXYGEN CONTAINING GAS AT TEMPERATURES BETWEEN ABOUT 200*C. AND ABOUT 500*C C., A COAL-TAR DISTILLATE BOILING ABOVE ABOUT 250*C. SELECTED FROM THE GROUP CONSISTING OF LIGHT AND HEAVY TAR OIL FRACTIONS, AND RESIDUES FROM REDISTILLATION OF LIGHTER DISTILLATES, AND MIXTURES THEREOF, SAID CONTACTING BEING CONTINUED FOR A TIME SUFFICIENT TO PROVIDE A PITCH-LIKE RESIDUE CONTAINING BETWEEN ABOUT 15% AND ABOUT 45% OF BENZOL INSOLUBLE COMPOUNDS, AND NOT MORE THAN ABOUT 5% QUINOLINE INSOLUBLES; SAID BLEND HAVING A RING AND BALL SOFTENING POINT BETWEEN ABOUT 50*C. AND ABOUT 90*C. AND HAVING A PENTRATION RATIO (A) 115/50/5 DIVIDED BY 77/100/5 OF BETWEEN ABOUT 5 AND ABOUT 10 WHEN THE BLEND HAS A SOFTENING POINT BETWEEN ABOUT 50* C. AND ABOUT 75*C.; AND (B) HAVING A PENETRATION RATIO 140/100/5 DIVIDED BY 115/100/5 BELOW ABOAUT 5 WHEN THE BLEND HAS A SOFTENING POINT BETWEEN ABOUT 75*C. AND ABOUT 90*C.