The influence of the type of quinoline insolubles on the quality of coal tar binder pitch

✍ Scribed by David R. Ball

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 547 KB
• Volume: 16
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(78)90025-8

✦ Synopsis

Seven pitches containing three types of quinoline insolubles, QI, were produced from a single coke oven coal tar. The tar was centrifuged into QI-rich and QI-lean fractions. A blend of the two fractions yielded a typical graphite electrode binder pitch. The QI content of the pitch derived from the QI-lean tar was increased through the addition of natural QI concentrate, or Ql as a furnace carbon black, or QI as mesophase by means of heat treatment. The pitches were evaluated as binders by measuring the flexural strength of 19 mm di~eter graphite electrodes. The results show that the typical electrode pitch is superior, and that increasing the QI content of the 01-lean material did not unmade it. The results also show that the Hexural strength of the derived graphite is not sjmply related to the cokingvalue of a binder.