C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
182/1
C10G 25/00 (2006.01) C10G 53/08 (2006.01) C10G 67/14 (2006.01)
Patent
CA 1323841
ABSTRACT OF THE DISCLOSURE Basic nitrogen compounds (BNC) are selec- tively removed from solvent extracted oils by adsorp- tion of said BNC's by solid acidic polar adsorbents. The oils are extracted using any of the common extrac- tion solvents, such as furfural, phenol, SO2, N- methyl-2-pyrrolidone (NMP), preferably NMP. The resulting raffinate, which contains the desirable oil fraction, has the BNC's present therein removed by adsorption thereof onto an adsorbent, characterized as being a solid, polar acidic adsorbent, exemplified by silica-alumina, a high alumina base amorphous cracking catalyst (such as manufactured by Ketjen/Akzo) and crystalline zeolite (such as H-Y zeolites) are effec- tive adsorbents. The adsorbents may additionally con- tain fluorine or may contain up to 30 weight percent water. The adsorbents are regenerated by either purg- ing with hydrogen at elevated temperature and pressure, or by washing the BNC saturated adsorbent with extrac- tion process extraction solvent, such as NMP. Extracted oil raffinate treated with the adsorbent to remove BNC exhibit superior uninhibited oxidation stability as compared to untreated conven- tional hydrofined oil.
556851
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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