METHOD OF PREPARING BROWN SULFUROUS DYE Russian patent published in 1998 - IPC

Abstract RU 2114137 C1

FIELD: chemical industry. SUBSTANCE: brown sulfurous dye is prepared by reacting 2,4,6-trinitrotolulene (trotyl) with sodium polysulfide in aqueous medium at 110-112 C for 23-24 h. Method makes it possible to produce intensive coloring which is resistant to physical and chemical effects. EFFECT: simplified technology. 1 tbl

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RU 2 114 137 C1

Authors

Salov B.V.

Shner V.F.

Artamonova N.N.

Belkin A.I.

Dates

1998-06-27—Published

1996-06-10—Filed