Production of hard asphalts by ultrafiltration of vacuum residua

Details Production of hard asphalts by ultrafiltration of vacuum residua Production of hard asphalts by ultrafiltration of vacuum residua

1991-08-19

1992-12-22

Myers, Helane

Mineral oils: processes and products

Asphalts, tars, pitches and resins; making, treating and...

208 22, 208 44, 1062731, C10C 100

Patent

active

051731720

ABSTRACT:
Hard asphalts exhibiting acceptable penetration and low temperature properties can be produced from vacuum residua from which such hard asphalts are not normally obtainable via typical vacuum distillate such as that derived from Arab Light crude and/or feeds substantially comprising Arab Light-type crudes by ultrafiltering the residua through a membrane.

REFERENCES:
patent: 4411790 (1983-10-01), Arod et al.
patent: 4797200 (1989-01-01), Osterhuber
patent: 4816140 (1989-03-01), Trambouze et al.
patent: 4874523 (1989-10-01), LaFreniere
"Colloidal Nature of Petroleum" Witherspoon, Trans. N.Y. Acad. Sci. 24, Ser. 2, No. 4, 344-61 (1962).
"Hindered Diffusion of Asphaltenes Through Microporous Membranes" Baltus, et al, Chem. Eng. Sci. vol. 38, No. 12 pp. 1959-1969 (1983).

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