Method for producing mesophase continuously
US4512874A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1983 |
| Grant date | Apr 23, 1985 |
| Priority date | — |
| Expiry date | Jun 24, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10C3/002
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for producing continuously 100% mesophase composed only of Q.I. component and Q.S. component in which a raw material of petroleum origin pitch is subjected continuously to a heat-treatment step in an amount necessary to produce a 100% mesophase taken out from a mesophase-growing and coalescing step, transferring the heat-formed pitch formed in the heat treatment step to a mesophase growing and coalescing step, taking out a definite amount of a non-mesophase pitch from the mesophase growing and coalescing step after stirring and heating treatment to return it to the heat-treatment step to repeat the stirring and heating treatment, and at the same time to take out 100% mesophase having constant properties from the mesophase growing and coalescing step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.