Abstract: An improvement in the process of granulating bleach activator using an organic binder selected from starch and cellulose derivatives polyacrylates, polymaleates and polyvinyl pyrrolidone, the process comprising dry mixing particulate activator and at least a portion of the binder in particulate form and then moistening the mixture with a granulating liquid, comprises using as granulating liquid an aqueous solution of a granulating aid which is a sequestrant optionally combined with a water-soluble inorganic salt. The granules are then dried. The product has improved activity in laundry detergents especially in low temperature wash and cold fill conditions.

Abstract: An extruded particulate body comprises a binder, usually having a melting point in the range 20.degree.-80.degree. C., with particulate bleach activator and particulate water-soluble disintegration aid substantially uniformly distributed throughout the body. The bleach activator is a mixture of a relatively non-surface active bleach activator, preferably tetra-acetylethylene diamine, and a relatively surface active activator, usually a C.sub.6-10 alkanoyloxy benzene sulphonate. The disintegration aid is usually a bleach stabilizor preferably a phosphonic acid or salt thereof. The extruded bodies are for incorporation into a particulate detergent formulation which contains a peroxy bleach component.

Abstract: Fluid loss control additives for oil-based well-working fluids comprise a solubilized lignite derivative and an oil-swellable or oil-soluble polymer. The solubilized lignite derivative may be oil-solubilized (e.g. a lignite/amine complex) or water-solubilized (e.g. causticized lignite) and may be incorporated in a polymer matrix or added to a dispersion of a polymer in an aqueous medium.