摘要 |
A packing material for liquid chromatography is produced by mixing 1.0 part by weight of carbon black, 0.5 to 2.5 parts by weight of one or a mixture of a synthetic resin which can be graphitized by heating and a toluene- or benzene-soluble component of pitches, and an organic solvent to obtain a mixture. The carbon black has a particle diameter of 12 to 40 nm, a specific surface area of 50 to 650 m<2>/g, a DBP oil absorption amount of 50 to 150 ml/100g. The synthetic resin is one selected from phenol resin, furan resin, furfural resin, divinylbenzene resin and urea resin. The pitches are ones selected from petroleum pitches, coal-tar pitches and liquefied coal oil. The mixture is granulated by spray granulation or emulsion granulation to obtain granules whose ratio Lmin/Lmax of a minor axis diameter Lmin to a major axis diameter Lmax is 0.90 to 1.0. The heat treatment of the granules is also made in an inert gas under pressure. |
申请人 |
NIPPON CARBON CO., LTD., TOKIO/TOKYO, JP;TOSOH CORP., SHINNANYO, YAMAGUCHI, JP |
发明人 |
ICHIKAWA, HIROSHI, C/O NIPPON CARBON CO., LTD, CHUO-KU, TOKYO, JP;YOKOYAMA, AKIRA, C/O NIPPON CARBON CO., LTD., CHUO-KU, TOKYO, JP;KAWAI, TAKANOBU, C/O NIPPON CARBON CO., LTD., CHUO-KU, TOKYO, JP;MORIYAMA, HIROYUKI, C/O TOSOH CORPORATION, SHINNANYOU-SHI, YAMAGUCHI-KEN, JP;KOMIYA, KATSUO, C/O TOSOH CORPORATION, SHINNANYOU-SHI, YAMAGUCHI-KEN, JP;KATO, YOSHIO, C/O TOSOH CORPORATION, SHINNANYOU-SHI, YAMAGUCHI-KEN, JP |