The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 1980
Filed:
Jun. 28, 1978
Wilhelm Bruening, Rio de Janeiro, BR;
Inai M Bruening, Rio de Janeiro, BR;
Petroleo Brasileiro S.A.-Petrobas, Rio de Janeiro, BR;
Abstract
This invention relates to a process for the preparation of silicious polymeric materials and their use in the separation of fluids in the gaseous phase, wherein the materials are obtained through three basic procedures: (a) polymerization of monomeric substances in the presence of high purity submicroscopic silica particles in which the polymerization of the monomers can be followed by a deactivation reaction with silylating agent; (b) addition of high purity submicroscopic silica particles to monomeric substances, and coupling regents, which will react with surface hydroxyl groups on the silica and a polymer or monomers which are forming a polymer in the reaction medium; (c) through dispersion of the high purity submicroscopic particles in plymeric organic substances. The materials obtained in this invention are solid, usually white, highly porous, of relatively high surface area, thermally stable and have good mechanical strength, and when used as a packing material in a gas chromatographic column provide excellent results with respect to permeability, efficiency, and selectivity.