Patent ID: 6090746
Filing Date: 2000-07-18
Classification: B01J,C07C

Abstract:
A process for producing water-soluble, surfactant-stabilized colloids of mono- and bimetals of groups VIII and Ib of the periodic system, said colloids having particles ranging in sizes of from 1 to 10 nm, said process comprising:a) reacting metal salts with a chemical reducing agent in the presence of a strongly hydrophilic surfactant selected from the group consisting of amphiphilic betaines, cationic surfactants, fatty alcohol polyglycol ethers, polyoxyethylene-carbohydrate-fatty alkyl esters, anionic surfactants and amphiphilic sugar surfactants, in water in the absence of an organic solvent, at a temperature between 0.degree. C. and 100.degree. C., at normal pressure, and optionally with the addition of an alkali carbonate and/or ammonium chloride to yield an aqueous solution comprising said colloids; andb) isolating said colloids from said aqueous solution in a concentration of >100 mg atom metal/liter.