Abstract: What is disclosed is a process for converting polydiorganosiloxanes to cyclopolydiorganosiloxanes with reduced cleavage of organic groups from silicon atoms. The process comprises (A) feeding a mixture of the polydiorganosiloxanes, a catalyst, and an organic solvent to a device in which water is formed as the polydiorganosiloxanes react in the presence of the catalyst and the organic solvent, the water formed being driven out of said device as a two-phase organic solvent/water azeotrope; (B) reacting the polydiorganosiloxane/catalyst/organic solvent mixture from (A), essentially free of water, to convert the polydiorganosiloxanes to the desired product cyclopolydiorganosiloxanes; and (C) recovery of the desired product cyclopolydiorganosiloxanes.

Abstract: Thickened, pourable liquid bleaching compositions which have been thickened with the aid of two different detergent-active materials, e.g. a tertiary amine oxide with a saturated fatty acid soap or an alkali metal sarcosinate often show a decrease in viscosity on storage of the composition.By inclusion of a third, synthetic detergent of the sulphate or sulphonate type, e.g. an alkylethersulphate, compositions are obtained with a significantly reduced decrease of viscosity during storage, particularly over longer periods and at higher storage temperatures.The compositions are useful for bleaching hard surfaces.