Process for the preparation of 1,4-diaminoanthraquinone-2-sulfon

Details Process for the preparation of 1,4-diaminoanthraquinone-2-sulfon Process for the preparation of 1,4-diaminoanthraquinone-2-sulfon

1986-01-13

1987-10-13

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C143665

Patent

active

046997350

ABSTRACT:
The invention relates to a process for the preparation of 1,4-diaminoanthraquinone-2-sulfonic acid by sulfonating 1,4-diaminoanthraquinone or leuco-1,4-diaminoanthraquinone, which comprises carrying out the sulfonation at elevated temperature with oleum as sulfonating agent, with or without the addition of a Lewis base. The 1,4-diaminoanthraquinone-2-sulfonic acid is used in particular for synthesizing anthraquinoid disperse dyes for dyeing hydrophobic fibre materials.

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