The isolation and characterization of vanadium porphyrins in Tahe crude oil has been carried out. The vanadium porphyrins were at first isolated by methanol extraction and then purified by column chromatography and th...The isolation and characterization of vanadium porphyrins in Tahe crude oil has been carried out. The vanadium porphyrins were at first isolated by methanol extraction and then purified by column chromatography and thin layer chromatography. Ultraviolet-visible spectrophotometry and laser desorption ionization-time of flight mass spectrometry were employed to characterize the vanadium porphyrins. The vanadium porphyrins in Tahe crude oil are chiefly ETIO homologues(C 26～C 39) with a small amount of DPEP homologues (C 29～C 39) and RHODO-ETIO homologues(C 29～C 39).展开更多
Many specifications of paving asphalts are closely related to their colloidal stability, which is, however, determined by their exact chemical compositions. The Yumen vacuum residue (YVR), the bottoms of a paraffinic...Many specifications of paving asphalts are closely related to their colloidal stability, which is, however, determined by their exact chemical compositions. The Yumen vacuum residue (YVR), the bottoms of a paraffinic crude oil is unfit for the production of highway paving asphalts directly, Neither are the de-oiled asphalts of the YVR. In this research a blending method and an optimal process of solvent de-asphalts are adopted to investigate the feasibility of formulating highway-paving asphalts from YVR. Results show that highway paving asphalts are formulated by blending solvent de-oiled asphalts with one or more of the materials including YVR, decanted oil from FCC process, and furfural extracts from lubricating base stocks. Further investigations indicate that adding oil decanted from FCC process to the solvent de-asphalting process can increase the de-asphalted oil production, improve the de-oiled asphalts quality, and thus optimize the refinery processes. The methodology of this research can be extended even to refineries processing non-paraffinic crude oils.展开更多
文摘The isolation and characterization of vanadium porphyrins in Tahe crude oil has been carried out. The vanadium porphyrins were at first isolated by methanol extraction and then purified by column chromatography and thin layer chromatography. Ultraviolet-visible spectrophotometry and laser desorption ionization-time of flight mass spectrometry were employed to characterize the vanadium porphyrins. The vanadium porphyrins in Tahe crude oil are chiefly ETIO homologues(C 26～C 39) with a small amount of DPEP homologues (C 29～C 39) and RHODO-ETIO homologues(C 29～C 39).
文摘Many specifications of paving asphalts are closely related to their colloidal stability, which is, however, determined by their exact chemical compositions. The Yumen vacuum residue (YVR), the bottoms of a paraffinic crude oil is unfit for the production of highway paving asphalts directly, Neither are the de-oiled asphalts of the YVR. In this research a blending method and an optimal process of solvent de-asphalts are adopted to investigate the feasibility of formulating highway-paving asphalts from YVR. Results show that highway paving asphalts are formulated by blending solvent de-oiled asphalts with one or more of the materials including YVR, decanted oil from FCC process, and furfural extracts from lubricating base stocks. Further investigations indicate that adding oil decanted from FCC process to the solvent de-asphalting process can increase the de-asphalted oil production, improve the de-oiled asphalts quality, and thus optimize the refinery processes. The methodology of this research can be extended even to refineries processing non-paraffinic crude oils.
