FIELD: organic chemistry and technology. SUBSTANCE: dinitro-derivative of aromatic compounds is reduced by the known method in the presence of catalyst taken from the group Ni, Pt, Pd followed by cooling to 30-90 C, catalyst removing by filtration, purification at pH = 4.0-6.5 in the presence of sorbent, for example, activated carbon and repeated filtration. After catalyst removing by filtration reaction mass is treated with antioxidant. Obtained an aqueous solution of diamine is used as azocomponent for azodyes synthesis. EFFECT: simplified method, increased yield, increased safety. 3 cl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING TETRACISAZO DYES | 1992 |
|
RU2016024C1 |
| METHOD OF PRODUCING WATER SOLUBLE AZO DYES | 1992 |
|
RU2016025C1 |
| PROCESS FOR PREPARING WATER-SOLUBLE AZODYES | 1992 |
|
RU2005753C1 |
| MONO- AND DISAZO-DERIVATIVES ON THE BASE OF 2,4,6-TRIAMINOTOLUENE AS AZO DYES AND METHOD OR THEIR PRODUCTION | 1994 |
|
RU2102415C1 |
| METHOD OF PRODUCING CHLORINE-SUBSTITUTED PHENYLENEDIAMINES | 2013 |
|
RU2547264C1 |
| METHOD OF PREPARING AZO DYES | 1998 |
|
RU2155782C2 |
| 0 |
|
SU462335A3 | |
| METHOD OF SYNTHESIS OF CEPHEM DERIVATIVES, REACTIVE THIOPHOSPHATE DERIVATIVES OF THIA- (OR DIA)ZOLE ACETIC ACID AND A METHOD OF THEIR SYNTHESIS | 1994 |
|
RU2097385C1 |
| PROCESS FOR PREPARING 4-AND/OR 6-NITRO-2-AMINOPHENOLS | 1992 |
|
RU2068407C1 |
