Reversed-phase packing material and method
US4920152A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1986 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | May 13, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Reversed-phase materials and a method for producing such materials are disclosed. In making the materials, first a thin layer of an adsorbate comprising reactive amine groups is adsorbed to a support material such as silica, alumina or titania. A portion of the reactive amine groups of said adsorbed coating are then reacted with an amount of a hydrophobic reagent sufficient to effect crosslinking of said coating. At least one remaining reactive amine group, and preferably all of the reactive amine groups of said crosslinked adsorbed coating, are then reacted, preferably in the presence of a proton scavenger, with an amount of a hydrophobic anhydride sufficient to form an amide bond with said reactive amine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.