Mineral oils: processes and products – Refining – Metal contaminant removal
Reexamination Certificate
2005-06-14
2005-06-14
Griffin, Walter D. (Department: 1764)
Mineral oils: processes and products
Refining
Metal contaminant removal
C208S252000, C208S253000
Reexamination Certificate
active
06905593
ABSTRACT:
A calcium-containing hydrocarbonaceous material is treated with an aqueous mixture, comprising acetate ion and an alkaline material and having a pH in the range of 3.0 to 5.0, in order to extract at least a portion of the calcium from the hydrocarbonaceous material into the aqueous phase. Acetic acid is a suitable source of acetate ion. Ammonium hydroxide, sodium hydroxide and potassium hydroxide are example alkaline materials.
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Hawker Lisa P.
Kramer David C.
Kuehne Donald L.
Chevron U.S.A.
Ellinwood Steven R.
Griffin Walter D.
Klaasen Alan
Nguyen Tam M.
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