公开(公告)号：CH602562A5

公开(公告)日：1978-07-31

申请号：CH1119775

申请日：1975-08-29

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TORISU YASUYOSHI ,  KABA SEISHICHIRO ,  MUKAI KEN

IPC: B23H7/26 ,  B23H7/28 ,  B23P1/04 ,  C07C79/37

公开(公告)号：DE2539631A1

公开(公告)日：1976-03-18

申请号：DE2539631

申请日：1975-09-05

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TORISU YASUYOSHI ,  KABA SEISHICHIRO ,  MUKAI KEN

IPC: C07C205/47 ,  C07C67/00 ,  C07C201/00 ,  C07C205/45 ,  C07C79/37

Abstract: Highly pure 5-nitro-1,4,4a,9a-tetrahydroanthraquinone can be obtained by subjecting 6-nitronaphthoquinone-containing crude 5-nitro-1,4-naphthoquinone to Diels-Alder condensation reaction with 1,3-butadiene in a solvent including benzene, an alkylated aromatic hydrocarbon such as toluene, xylene or the like, a halogenated aromatic hydrocarbon such as chlorobenzene, dichlorobenzene, or the like, or a halogenated aliphathic hydrocarbon such as trichloroethylene, perchloroethylene or the like, cooling the resulting reaction solution to crystallize the reaction product, and separating the thus crystallized product by filtration. 5-nitro-1,4,4a,9a-tetrahydroanthraquinone has a relatively small solubility in the above-mentioned solvents, while the solubility of 6-nitro-1,4,4a,9a-tetrahydroanthraquinone in the solvents is rather great, thus the above-mentioned solvents being effective for the separation of these compounds from each other. The oxidation and the subsequent reduction of the thus obtained 5-nitro-1,4,4a,9a-tetrahydroanthraquinone yields 1-aminoanthraquinone with a purity above 98 wt% and a 2-aminoanthraquinone content below 1 wt%. The above-mentioned solvents are also effective for purification of 6-nitro-1,4,4a,9a-tetrahydroanthraquinone-containing 5-nitro-1,4,4a,9a-tetrahydroanthraquinone by recrystallization.

公开(公告)号：JPS5129473A

公开(公告)日：1976-03-12

申请号：JP10191474

申请日：1974-09-06

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TORISU MITSUYOSHI ,  KABA SEISHICHIRO ,  MUKAI TAKESHI

IPC: C07C205/47 ,  C07C67/00 ,  C07C201/00 ,  C07C205/45