Abstract: This process is carried out in the presence of a solid catalyst comprising an active phase. The catalyst is formulated and the conversion is carried out in a medium essentially free of strong mineral acid.

Abstract: This invention relates to water-soluble polysaccharide-based products that require less time and effort to incorporate into aqueous formulations, compared to existing polysaccharide products. This invention can be applied more particularly to cationic guar products to be used in cosmetic compositions. The product is in the form of granules and comprises a binding and/or dispersing agent and/or wetting agent.

Abstract: The invention concerns a capsule comprising at least a mineral coating (E) and a core (N) comprising at least a polyhydroxylated compound (P), each coat essentially consisting of a single mineral compound. The mineral coating (E) advantageously consisting of a single mineral compound layer. The invention also concerns a method for obtaining said capsules and their use.

Abstract: An agent for removing heavy metals from an aqueous effluent, including at least one compound selected from a silicate or aluminosilicate compound such as an alkali-metal silicate or aluminosilicate, and a carbonate compound such as an alkali-metal carbonate; a sulphur compound; and optionally a carrier, particularly a clay carrier. The agent may also be used to stabilize such metals. Said agent is useful for removing or stabilizing heavy metals, including mercury, that are contained in the water used for scrubbing flue gases from waste incinerators, particularly for household refuse or industrial waste.

Abstract: The invention concerns an agent for eliminating heavy metals contained in an aqueous effluent comprising: an alkaline metal silicate, an alkaline metal carbonate; a phosphate compound, for example a sodium orthophosphate: and optionally a carrier, in particular a clay. Said agent may further contain a sulphur compound. Said agent can constitute an agent stabilizing said metals, and can be used for eliminating or stabilizing heavy metals, in particular cadmium, nickel and lead, contained in industrial aqueous effluents.

Abstract: Pulverulent detergent compositions, particularly suitable for washing and dishwashing machines, include a surfactant and a builder therefor, such builder comprising an alkali metal silicate advantageously having a SiO.sub.2 /M.sub.2 O molar ratio ranging from about 1.6 to 3.5, at least 30% and preferably at least 50% of the silicon atoms of which being in the Q.sub.2 and Q.sub.3 configurations, or such builder comprising said alkali metal silicate sorbed onto a particulate inert support substrate. Also, detergent compositing comprising (a) an aqueous solution of an alkali metal silicate having an SiO.sub.2 /M.sub.2 O molar ratio ranging from about 1.

Abstract: Microporous composites adopted for electrolytic applications, e.g., as cathodes in the electrolysis of sodium chloride, are comprised of a regular, homogeneous and consolidated microporous deposit of monodispersed carbon fibers on a perforated rigid support substrate therefor, said carbon fibers having a distribution by length such that the mean length of at least 80% of the individual fibers, plus or minus 20%, corresponds to the mean length of said fibers.

Abstract: Microporous composites adopted for electrolytic applications, e.g., as cathodes in the electrolysis of sodium chloride, are comprised of a regular, homogeneous and consolidated microporous deposit of monodispersed carbon fibers on a perforated rigid support substrate therefor, said carbon fibers having a distribution by length such that the mean length of at least 80% of the individual fibers, plus or minus 20%, corresponds to the mean length of said fibers.

Abstract: Controlledly microporous shaped articles adopted for use, e.g., as electrodes and diaphragms, are produced by consolidating a fibrous matrix with a latex binder material, notably by deposition onto a rigid perforate substrate, the lattice network of said binder material comprising a silica-based derivative, e.g., a precipitated or pyrogenic silica.