Addition of Spent Activated Carbon to Asphalt Compositions and to Coking Units as Feedstock or Quencher

Abstract

An asphalt mastic is prepared by combining spent activated carbon, that has not been regenerated, with liquid asphalt to achieve a composition that is useful for a variety of applications for which asphalt is used, including aggregate compositions and roofing materials. The activated carbon can also serve as a foaming initiator for the production of foamed asphalt. Still further, the activated carbon can be used as coking unit feedstock and as a quencher for a delayed coking unit.

1 . A process for disposing of spent, unregenerated activated carbon, said process comprising introducing a slurry of said spent, unregenerated activated carbon comminuted to particles whose longest dimension is a maximum of about 250 microns into a petroleum refinery coking unit under coking conditions in the presence of a coker hydrocarbon feedstock to form coke. 
   
   
       2 . The process of  claim 1  wherein said slurry is a slurry of said particles in an aqueous liquid. 
   
   
       3 . The process of  claim 1  wherein said slurry is a slurry of said particles in an oil. 
   
   
       4 . The process of  claim 1  wherein said particles constitute from about 1% to about 40% of said slurry. 
   
   
       5 . The process of  claim 1  wherein said slurry comprises said particles, a member selected from the group consisting of clays and gums in a particle-suspending amount, and water. 
   
   
       6 . The process of  claim 1  wherein said slurry is so introduced at an amount relative to said coker hydrocarbon feedstock ranging from about 0.5% to about 20%. 
   
   
       7 . The process of  claim 1  wherein said longest dimension of said particles is a maximum of about 100 microns. 
   
   
       8 . The process of  claim 1  wherein said longest dimension of said particles is a maximum of about 50 microns.