Cleanup of hydrocarbon-conversion system

Cleanup of oily wastes

Closed cyclone FCC catalyst separation method and apparatus

Closed cyclone FCC catalyst separation method and apparatus

Closed cyclone FCC catalyst separation method and apparatus

Closed cyclone FCC catalyst separation with stripping gas inject

Closed cyclone FCC system with provisions for surge capacity

Closed FCC cyclone process

Closed reactor FCC system with provisions for surge capacity

Closed-loop vacuum fractionation process

CO oxidation promoters for use in FCC processes

CO oxidation promoters for use in FCC processes

Co-generation system for co-producing clean, coal-based fuels an

Co-processing of carbonaceous solids and petroleum oil

Co-processing of residual oil and coal

Co-processing of residual oil and coal

Co-processing of straight run vacuum resid and cracked residua

CO.sub.2 Pretreatment prevents calcium carbonate formation

CO.sub.2 treatment to remove +2 ionic metal from crude

Co2 treatment to remove organically bound metal ions from crude