Recracking of cat naphtha for maximizing light olefins yields

Recycle of oily refinery wastes

Recycle of oily refinery wastes

Recycle of unconverted hydrocracked residual to hydrocracker aft

Recycle of waste streams

Red mud as a first-stage catalyst in a two-stage, close-coupled

Reduced chaos cyclone separation

Reduced gas holdup in an ebullated bed reactor

Reduced gas holdup in ebullated reactor

Reduced NOx combustion promoter for use in FCC processes

Reduced puffing needle coke from decant oil

Reducing CO2 levels in CO2-rich natural gases converted into...

Reducing hydrogen consumption in hydrotreating petroleum fractio

Reducing NO.sub.x emissions from FCC regenerators by segregated

Reducing NO.sub.x emissions with antimony additive

Reducing NO.sub.x emissions with group IIIB compounds

Reducing NO.sub.x emissions with zinc catalyst

Reducing sulfur trioxide concentration in regeneration zone flue

Reducing undesired polymerization in the basic wash unit of...

Reduction of benzene in gasoline