Needle cokes produced from coal tar pitches after removal of nitrogen compounds

Hidehiko Usuba, Taiji Oishi, Yoichi Kawano, Kunio Miura, Isao Mochida, Yozo Koral, Kinya Sakanishi, You Qing Fei

Research output: Contribution to journalConference articlepeer-review


The carbonization of coal tar pitch denitrogenated with nickel and aluminum sulfates was studied to examine whether the the removal of nitrogen compounds in coal tar pitch leads to the reduction of nitrogen content in the resultant coke. Nickel and aluminum sulfates were found to be effective to remove basic nitrogen compounds from coal tar pitch to give the needle cokes of low nitrogen content which are expected to show smaller puffing at the rapid graphitization. The efficiency of combination of extractive fractionation with adsorbing seperation of basic nitrogen species is brieflydiscussed for the practical application.

Original languageEnglish
Pages (from-to)576-577
Number of pages2
JournalExtended Abstracts and Program - Biennial Conference on Carbon
Publication statusPublished - 1991
Event20th Biennial Conference on Carbon - Santa Barbara, CA, USA
Duration: Jun 23 1991Jun 28 1991

All Science Journal Classification (ASJC) codes

  • General Engineering


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