Method of reclaiming carbonaceous materials from scrap tires and products derived therefrom
The invention relates a pyrolytic carbon black produced from pyrolyzed rubber, the pyrolytic carbon black having an ash content ranging between 9-15%, a toluene discoloration at 425 mu of between 80-90% transmission, an iodine adsorption between 30 and 45 mg/g; and, an n-dibutyl phthalate absorption number of or to 65 cc/100 gm.
1. A pyrolytic carbon black having; in combination
a) an ash content ranging between 9-15%;
b) a toluene discoloration at 425 mu of between 80-90% transmission;
c) an iodine adsorption between 30 and 45 mg/g;
d) a pour density of between 24-26 lb/ft 3 ;
e) an n-dibutyl phthalate absorption number of up to 65 cc/100 gm; and,
when produced from a continuous recycling process for rubber tires comprising the steps of:
a) shredding cleaned rubber tires into shreds less than 2″ long;
b) pyrolyzing the shreds in a reaction chamber of a thermal processor in a first anaerobic environment to produce a char; wherein the temperature within the reaction chamber is between 450-550° C.;
c) drawing off volatile organics from the reaction chamber;
d) removing the char from the reaction chamber;
e) cooling: the char in a second anaerobic environment;
f) removing metal and textile components from the char to obtain pyrolytic carbon black; and,
g) milling and sizing the pyrolytic carbon black so obtained into particles of 325 mesh size or less.
2. A pyrolytic carbon black according to claim 1 , wherein the temperature within the reaction chamber is between 450-500° C.
3. A pyrolytic carbon black according to claim 2 , wherein the temperature within, the reaction chamber is 500° C.
4. A pyrolytic carbon black according to claim 1 , wherein the process further comprises, after step g) the step of pelletizing the pyrolytic, carbon black into pellets of 60 to 100 mesh size.
5. A pyrolytic carbon black according to claim 1 wherein the shreds are less than 1.5″ long.
6. A pyrolytic carbon black according to claim 1 , wherein the process further comprises, prior to step b), lubricating and cleaning the shreds.
7. A pyrolytic carbon black produced from pyrolyzed rubber, said pyrolytic carbon black having:
a) an ash content ranging between 9-15%;
b) a toluene discoloration at 425 mu of between 80-90% transmission;
c) an iodine adsorption between 30 and 45 mg/g;
d) a pour density of between 24-26 lb/ft 3 ; and,
e) an n-dibutyl phthalate absorption number of up to 65 cc/100 gm.
8. A pyrolytic carbon black according to claim 7 , which, when used to make rubber, produces a rubber having a minimum tensile strength between 2500-3100 psi.
9. A pyrolytic carbon black according to claim 8 , wherein the rubber is styrene-butadiene copolymer rubber and the minimum tensile strength is 2500 psi.
10. A pyrolytic carbon black according to claim 8 , wherein the rubber is natural rubber and the minimum tensile strength is 3100 psi.