Chromatographic packings comprising metal oxide/hydroxide reacted with phosphonic acid
US4786628A · kind A · utility
13Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1987 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Mar 9, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y40/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A chromatographic packing material is disclosed comprising a metal oxide/hydroxide particle having chemically bonded to reactive sites on a surface thereof, a monolayer of one or more phosphonic acids. The bond to the metal oxide/hydroxide surface is formed by reaction of the phosphorous-containing group of the phosphonic acid with the metal oxide/hydroxide surface, so that the carbon-containing or non-polar group of the phosphonic acid is oriented away from the metal oxide/hydroxide surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.