Production of a stable anionic aqueous colloidal silica suspension with a neutral pH, e.g. useful for clarifying beer, comprises mixing a basic suspension with an acidic suspension

摘要

Production of an anionic aqueous colloidal silica suspension (I) with a neutral pH comprises mixing an anionic aqueous colloidal silica suspension having a basic pH with an anionic aqueous colloidal silica suspension having an acidic pH, where the suspensions comprise individual colloidal silica particles unconnected by siloxane linkages. An Independent claim is also included for a method for clarifying unfiltered beer, comprising adding (I), allowing flocculation to occur, and separating the sediment.