Shell Internationale Research Maatschappij, B.v.

Shell Canada Limited

Shell Explorer Limited

Abraham Verhoeff

Kenneth A MacKenzie

An apparatus is provided for removing a floating pollutant such as oil from a liquid such as water by passing the oil and water over the top of a weir and allowing the oil and water to fall between a side of the weir and a baffle closely adjacent to the weir and extending into a pool at the bottom of the weir. Oil collects in a quiet area adjacent the baffle while the water passes over a subsequent weir to removal.

Topological separator

An improved method for preparing clay-based grease compositions is described whereby a clay containing pre-grease is prepared and a water phase separated from the clay-bearing pre-grease prior to the addition of an epoxide which is cured, e.g., simultaneously with the dehydration of the pre-grease. The grease compositions prepared in this manner show improved water resistance over those wherein the epoxide is added prior to separation of the water phase and the grease is also more responsive to the addition of conventional grease additives such as extreme pressure additives, anti-corrosion additives and anti-oxidants.

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Toronto, Canada

Abraham Verhoeff