Method for manufacture of activated carbon fiber
US4412937A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1982 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Apr 23, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/382
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for manufacturing activated carbon fibers is disclosed. The method is comprised of the steps of: PA0 (1) causing an acrylic fiber to contain therein a treating agent selected from the group consisting of phosphorus and boron compounds in a concentration of 0.01 to 0.3% by weight as phosphorus or boron based on the weight of the fiber; PA0 (2) preoxidizing the acrylic fiber in an oxidizing atmosphere at a temperature exceeding 200.degree. C. and giving a core ratio of 18% until the amount of bonded oxygen becomes not less than 15% by weight based on the weight of the fiber thereby producing a preoxidized fiber; PA0 (3) adjusting the concentration of the treating agent in the preoxidized fiber to a level in the range of 0.04 to 1% by weight based on the thus obtained preoxidized fiber; and PA0 (4) thereafter activating the fiber at a temperature in the range of 900.degree. to 1,300.degree. C. The resulting fiber has improved high strength, high adsorbing ability and high processibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.