Abstract: The present invention relates to a system and method for avoiding hydrate formation during a shutdown of a deep-water floating production, storage and offloading unit with a long distance tie back. In one embodiment the system is configured such that during a shutdown at least a portion of fluids in the production flow loop are delivered to the one or more wash tanks in the hull. Advantageously, this may allow one to avoid having to oversize the expensive top-side equipment.

Abstract: A method is disclosed for removing impurities such as nitrogen and/or sulfur compounds from a hydrocarbon feed, in which the feed is contacted with an adsorbent including a nitrogen-containing organic heterocyclic salt deposited on a porous support, e.g., a supported ionic liquid. Additionally, a method for hydrotreating a hydrocarbon feed which includes a hydroprocessing step is disclosed, wherein prior to hydroprocessing, the feed is contacted with an adsorbent including a supported ionic liquid. Additionally, a method for producing a lube oil which includes isomerization dewaxing of a base oil fraction is disclosed, wherein prior to the isomerization dewaxing step, the base oil fraction is contacted with an adsorbent including a supported ionic liquid. In one embodiment, the adsorbent is regenerated to restore its treatment capacity.

Abstract: A denitrification method is disclosed for removing nitrogen compounds from a hydrocarbon feed in which the feed is contacted with an adsorbent including an organic heterocyclic salt deposited on a porous support. Additionally, a method for hydrotreating a hydrocarbon feed which includes a hydroprocessing step is disclosed, wherein prior to hydroprocessing, the feed is contacted with an adsorbent including an organic heterocyclic salt deposited on a support. Additionally, a method for producing a lube oil which includes isomerization dewaxing of a base oil fraction is disclosed, wherein prior to the isomerization dewaxing step, the base oil fraction is contacted with an adsorbent including an organic heterocyclic salt deposited on a support.

Abstract: A method is disclosed for removing impurities such as nitrogen and/or sulfur compounds from a hydrocarbon feed, in which the feed is contacted with an adsorbent including a nitrogen-containing organic heterocyclic salt deposited on a porous support, e.g., a supported ionic liquid. Additionally, a method for hydrotreating a hydrocarbon feed which includes a hydroprocessing step is disclosed, wherein prior to hydroprocessing, the feed is contacted with an adsorbent including a supported ionic liquid. Additionally, a method for producing a lube oil which includes isomerization dewaxing of a base oil fraction is disclosed, wherein prior to the isomerization dewaxing step, the base oil fraction is contacted with an adsorbent including a supported ionic liquid. In one embodiment, the adsorbent is regenerated to restore its treatment capacity.

Abstract: A denitrification method is disclosed for removing nitrogen compounds from a hydrocarbon feed in which the feed is contacted with an adsorbent including an organic heterocyclic salt deposited on a porous support. Additionally, a method for hydrotreating a hydrocarbon feed which includes a hydroprocessing step is disclosed, wherein prior to hydroprocessing, the feed is contacted with an adsorbent including an organic heterocyclic salt deposited on a support. Additionally, a method for producing a lube oil which includes isomerization dewaxing of a base oil fraction is disclosed, wherein prior to the isomerization dewaxing step, the base oil fraction is contacted with an adsorbent including an organic heterocyclic salt deposited on a support.

Abstract: Methods for producing a substantially desulfurized hydrocarbon fuel stream, using no substantial amount of hydrogen, at pressures less than 125 psig are described. The process uses two fixed beds in series to remove sulfur and/or other heteroatoms to produce a substantially desulfurized (less than 1 ppm sulfur) hydrocarbon fuel stream. The first fixed bed uses a transition metal catalyst dispersed on an inorganic oxide matrix and the second bed uses a high surface area, porous, amorphous inorganic oxide catalyst or a high surface area porous carbonaceous catalyst. The second fixed bed can additionally comprise one or more metals.