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公开(公告)号：US20230303933A1
公开(公告)日：2023-09-28
申请号：US18023480
申请日：2021-07-30
Applicant: SHOWA DENKO K.K.
Inventor： Yutaro ISHIKAWA , Nobuhiro NISHI , Keisuke OTA
Abstract: The present invention provides pitch for manufacturing carbon materials, the pitch having a high fixed carbon content and low viscosity and being obtained by using a petroleum-based heavy oil as a material. Pitch is produced by a method comprising: a step for preparing a material oil containing a petroleum-based heavy oil and an indene compound represented by general formula (1) (step 1); a step for thermally treating the material oil (step 2); and a step for distilling the thermally treated product and obtaining pitch as a high-boiling-point component (step 3). (In general formula (1), Ar represents an aromatic ring having 1 to 3 rings; R1 to R4 each independently represent a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an alkenyl group having 2 to 3 carbon atoms; R5 represents an alkyl group having 1 to 3 carbon atoms or an alkenyl group having 2 to 3 carbon atoms; m represents an integer from 1 to 3; n represents an integer from 0 to 4 (when the number of rings of Ar is 1), an integer from 0 to 6 (when the number of rings of Ar is 2), or an integer from 0 to 8 (when the number of rings of Ar is 3); adjacent R5s may be bonded together to form an alicyclic ring; and a hydrogen atom is bonded to Ar which is not substituted by R5.)
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公开(公告)号：US20220220387A1
公开(公告)日：2022-07-14
申请号：US17595653
申请日：2021-01-21
Applicant: SHOWA DENKO K.K.
Inventor： Nobuhiro NISHI , Keisuke OTA , Yoshikuni OKUMURA
IPC: C10C3/00 , C10C3/06 , C01B32/205 , H05B7/085
Abstract: Provided is impregnated pitch having a high fixed carbon content despite being petroleum-based pitch. The method for producing impregnated pitch for graphite electrode production according to one embodiment includes heat treatment of ethylene bottom oil and distillation of the heat-treated product to remove low-boiling-point compounds.
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