Production of carbon by eliminating hydrogen halide from polymerized halohydrocarbons
US3960768A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1974 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Jul 5, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Hard abrasion-resistant carbon is obtained from polymerized halohydrocarbons by elimination of hydrogen halide in a two-stage process carried out so that in the first decomposition stage, which is carried out at temperatures within the range from 140.degree. to 250.degree.C, a definite amount (not less than 5% by weight and not more than 50% by weight) of the total amount of hydrogen halide capable of being split off is removed. Appropriately shaped end products can be obtained by using raw materials having a globular, cylindrical or other shape. The carbon obtained is suitable as the stationary phase for chromatographic separation and analysis of mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.