Method of purifying polyacrylonitrile
US5286844A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Nov 20, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There are disclosed a method of purifying a polyacrylonitrile which comprises removing iron compounds or ions thereof and aluminum compounds or ions thereof which can be contained as impurities in a polyacrylonitrile obtained by aqueous suspension polymerization using an inorganic redox initiator, from a solution consisting of said polyacrylonitrile and an organic solvent capable of dissolving said polyacrylonitrile, by the use of a substance having ion-exchanging ability which is insoluble in said organic solvent; a process for producing fiber from the polyacrylonitrile thus purified; and a process for producing carbon fiber from said fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.