N,N′-二-(4,6-二氯-[1,3,5]-三嗪基)-2,6-二氨基己酸的合成与鞣制性能

Synthesis and Tanning Properties of N, N'-bis- (4,6-dichloro -[1,3,5]- triazin-2-yl) -2,6-diaminohexanic acid

摘要:

在水为介质的条件下，以三聚氯氰(TCT)与赖氨酸(Lys)为原料，经缩合反应制备N,N′-二-(4,6-二氯-[1,3,5]-三嗪基)-2,6-二氨基己酸(简称DTDHA)，利用FTIR和1HNMR对其结构进行了表征。通过正交实验考察了原料物质的量之比、缚酸剂种类、反应时间对反应的影响，得出较适宜的反应条件为：n(三聚氯氰)：n(赖氨酸)=3.0:1.0，KOH做缚酸剂，反应时间6h，在该条件下DTDHA产率为91%。并将产物应用于生皮鞣制，以鞣制坯革的收缩温度为考察指标，采用单因素实验对鞣制工艺条件进行了优化。得到适宜的鞣制工艺条件为：鞣剂用量20%（以灰皮质量为基准，下同），温度从25℃开始每隔2h阶梯上升15℃，最终达到55℃，鞣制总时间8h，在此条件下，坯革的收缩温度为85.6℃。此鞣制工艺下合成产物具有良好的鞣制效应，是一种新型的有机合成鞣剂

Abstract:

N,N'-bis-(4,6-dichloro-[1,3,5]-triazin-2-yl)-2,6-diaminohexanic acid(DTDHA for short) have been synthesized by reacting cyanuric chloride(TCT) with lysine under water-mediated conditions. The orthogonal test was carried out on the three factors of molar ratio of reaction raw material, type of acid-binding agent and reaction time, and the suitable reaction conditions were raw material molar ratio n (cyanuric chloride): n (lysine) = 3: 1, KOH as acid binding agent, the reaction time 6h, the yield was 91%. The product was applied to the tanning of raw hides. The shrinkage temperature of the tanning leather was used as the inspection index. The single factor test method was used to optimize the technical conditions of the tanning process. The results showed that the optimum tanning process conditions were as follows: tanning agent dosage 20%, temperature rising from 25°C, stepwise control rising by 15°C every 2 hours, finally reaching to 55°C, total tanning for 8 hours, Under these conditions, the shrinkage temperature of the crust leather is 85.6℃. The synthetic product has a good tanning effect and belongs to a new type of organic synthesis tanning agent.