(under subclass 257) Processes wherein aluminum oxide or a natural caly is employed.
(1) Note. This subclass contains, for example, manipulative processes of removing gums and gum formers by polymerizing the olefinic constituents using solid contact agents such as alumina or natural clays as the catalyst and then removing the polymer formed from the oil.
SEE OR SEARCH THIS CLASS, SUBCLASS:
245, for processes of desulfurizing mineral oils using a silicon containing treating agent.
248, for processes of desulfurizing mineral oils using aluminum or a compound thereof as the treating agent.
250, for other desulfurizing processes wherein solid contacting agents are used.
297, for other refining processes involving contacting mineral oil with a solid contact agent (catalyst or adsorbent). 299+, for other refining processes involving contacting the mineral oil with solid contact agent (catalyst or adsorbent).
