皮革青莲5B合成工艺研究

Synthesis of Leather Brilliant Violet 5B

将α（Ｎ乙基苯胺基）间苯磺酸和甲醛在８５～９０℃反应２ｈ，然后在Ｋ２ＭｎＯ４、Ｈ２ＳＯ４存在下与Ｎ，Ｎ二乙基苯胺缩合反应２ｈ，再成盐，过滤，干燥，所得染料再与酸性艳红Ｂ拼混，即得皮革青莲５Ｂ。该染料用于皮革染色具有着色丰实、艳丽、遮盖性好的特点，并且与其它染料有较好的配伍性，在碱性还原条件下不会产生致癌芳香胺。表１。

Abstract α-(N-ethyl phenyl amino)m-benzene sulfonic acid is reacted with formaldehyde at 85～90℃ for 2 hr. In the presence of KM_nO_4, H_2SO_4 , the mixture is carried out the condensation reaction with N, N-diethyl aniline for 2 hr to give sodium salt which will be filtered and dried. The obtained dyestuff is matched with acid Brilliant B to produce Leather Brilliant Violet 5 B. It has, when used in dyeing leathers, many excellent properties, such as better dyeability, brilliant color, good coverage and good compatibility with other dyestuffs. It doesn't crack into aromatic amine causing cancer under the alkali reduction condition.