Fluorinated silica catalyst and preparation of aromatic/aliphatic nitriles in the presence thereof
US4504595A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | May 14, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C253/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved fluorinated siliceous catalyst, well adapted for the catalytic synthesis of aromatic/aliphatic nitriles from their corresponding formamides, formanilides or amides, is comprised of a plurality of silica particulates, the specific surface of which ranging from about 200 to about 300 m.sup.2 /g, having a total pore volume ranging from about 1 to about 1.5 cm.sup.3 /g, with an average pore diameter ranging from about 100 to about 200 .ANG., having an exchange pH of less than about 3, and with the fluorine content thereof bonded to the silica, expressed in F.sup.-, ranging from about 0.05 to about 2% by weight based upon the silica, and the sodium content thereof, expressed as Na.sub.2 O, being less than about 1% by weight, also based upon the silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.