초록 ▼

Provided is a method for preparing a fluid containing size-controlled particles that is optimized with respect to use of a target fluid as a matrix fluid under conditions approximating actual conditions. In a preferred embodiment, size-controlled SiO.sub.2 particles are obtained by mixing and disper

Provided is a method for preparing a fluid containing size-controlled particles that is optimized with respect to use of a target fluid as a matrix fluid under conditions approximating actual conditions. In a preferred embodiment, size-controlled SiO.sub.2 particles are obtained by mixing and dispersing SiO.sub.2 starting particles having various sizes in a N.sub.2 carrier gas followed by fractionation with a fractionator. The size-controlled particles are electrostatically collected by a porous member from the carrier gas flow. Ultrasonic vibrations are then applied to the porous member while a HCl matrix fluid flows through the porous member loaded with the size-controlled particles. This causes release of the size-controlled particles from the porous member and their admixture and dispersion into the HCl matrix fluid.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for preparing a fluid that contains size-controlled particles, which comprisesa predispersion process in which starting particles having various sizes and comprising material inert to a matrix fluid are dispersed into a high-purity carrier gas that is inert wit

[ What is claimed is:] [1.]1. A method for preparing a fluid that contains size-controlled particles, which comprisesa predispersion process in which starting particles having various sizes and comprising material inert to a matrix fluid are dispersed into a high-purity carrier gas that is inert with respect to said starting particles,a fractionation process in which size-controlled particles are obtained by fractionating said starting particles by passing a flow of the starting particle-loaded carrier gas through a dry-process fractionator,a collection process in which a flow of the carrier gas loaded with the now size-controlled particles is passed through a porous member in order to collect said size-controlled particles on said porous member, with said porous member comprising a material inert with respect to the matrix fluid and effecting an electrostatic particle collection, anda main dispersion process in which said size-controlled particles are released from the porous member and dispersed into the matrix fluid by passing a flow of said matrix fluid through the porous member loaded with the size-controlled particles while at the same time applying ultrasonic waves to said porous member.