Encapsulated particulate matters in a sol-gel silica matrix and method of preparation
US10183270B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Nov 21, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2253/25
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A particulate sorbent includes a carbonaceous and/of non-carbonaceous particulate matter encapsulated in sol-gel sorbent matrix where microparticles of a porous sol-gel metal oxide network display a high surface area with small cross-section pores and a nanoparticle or microparticle filler that is a carbonaceous and/or non-carbonaceous particulate matter. The particulate sorbent is prepared by dispersing carbonaceous and/of non-carbonaceous particulate matter in a mixture of a metal oxide precursor, water, catalyst and optionally a solvent and a polymer functionalized to react with the metal oxide precursor. Catalysis is by acid followed by base to separate hydrolysis in the sol with condensation to a gel to give a highly porous gel. The gel is subsequently fractured into sorbent particles. The sorbent particles can be used for sampling or separating analytes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.