Ultrasound-assisted desulfurization of fossil fuels in the...

Upflow reactor system with layered catalyst bed for...

Upgrading asphaltene containing oils

Upgrading fuel fractions in a re-refined oil process

Upgrading heavy gas oils

Upgrading heavy hydrocarbon oils using sodium hypochlorite

Upgrading heavy oil

Upgrading hydrocarbonaceous oils with an aqueous liquid

Upgrading metal-contaminated petroleum oils containing vanadium

Upgrading of aromatic liquids

Upgrading of hydrocarbon feedstock

Upgrading of pre-processed used oils

Upgrading petroleum and petroleum fractions

Use of a metal oxide solid solution for sweetening a sour hydroc

Use of alkanolamines in sweetening sour liquid hydrocarbon strea

Use of caesium-exchanged faujasite type zeolites for intense...

Use of deashed coal as a flushing agent in a coal deashing proce

Use of decahydro pyrazino [2,3-b] pyrazine for the reduction of

Use of dilute aqueous solutions of alkali polysulfides to remove

Use of high ethoxylate low carbon atom amines for simultaneous r