Abstract: An underwater electrical generating system has an electrical generator and first and second cylinders. Each cylinder has a water inlet and a water outlet. A valve control meters the water flow through the water inlet and water outlet. Each cylinder as a reciprocating piston with a rod that turns the generator to produce electricity. Static water pressure is present in the cylinders when the cylinders are submerged and is used to force the pistons to turn the generator to produce electricity.

Abstract: The mineral acid catalyst is removed from the products of cumene hydroperoxide cleavage by contact with an aqueous solution of an inorganic salt and an excess of an alkali metal hydroxide or phenate in a first zone. Suitably the aqueous solution contains sodium sulphate and sodium hydroxide or phenate. The aqueous layer is removed and the organic layer contacted in a second zone with an aqueous solution comprising an inorganic salt and sufficient weak acid to decompose any phenate carried over from the first zone. Suitable weak acids are oxalic and citric acids but the preferred acid is carbonic acid formed `in situ` by passing carbondioxide into the aqueous inorganic salt solution.