Nickel and cobalt hexamethylentetramine complexes (NO3)2Me(H2O)6(HMTA)2.4H2O (Me = Co2+, Ni2+): new molecular precursors for the preparation of metal dispersions.

Nickel and cobalt hexamethylenetetramine (HMTA) complexes (NO3)2Me(H2O)6(HMTA)2.4H2O were prepared and characterized structurally by single-crystal X-ray diffraction. Both compounds crystallize in the triclinic P1 space group with the same structure.

A new material for selective removal of nitrogen compounds from gasoils towards more efficient HDS processes.

A selective removal of nitrogen compounds from gasoils is proposed, using a recyclable sorbent capable of forming charge-transfer complexes; the selective elimination of nitrogen compounds strongly improves the hydrodesulfurization (HDS) of denitrogenated feed.