Method for forming carbon fibers
US5374415A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Feb 3, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/1272
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a preferred embodiment, an apparatus and method for forming carbon fibers in a gas phase reaction is disclosed wherein a reactor defines a reaction chamber with a closed end and an outlet, and a reactant feed tube which extends generally axially therewithin. Gaseous reactants are injected into the reactor through an opening of the feed tube. Preferred reactants include methane, natural gas, hydrogen sulfide, ammonia, and an iron-containing compound dispersed in a carrier gas. The apparatus includes purge means for intermittently and forcibly moving any fibers clogging the reactor out of the reactor; and means for intermittently oxidizing carbonaceous material in the reactor. In use, a period of fiber formation is followed by one or more purge steps to essentially cleanse the reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.