摘要
以苯酚为原料先合成出二羟基二苯基砜 ,再将二羟基二苯基砜与甲醛和氨基酸缩合 ,制备出了一种芳砜羧酸预鞣剂DSCA。通过毛细管电泳和红外光谱分析 ,确认了芳砜羧酸的形成。将DSCA用于预鞣 ,可将裸皮的收缩温度由 5 5℃提高到 72℃ ,可将常规铬鞣废液中的含铬量降低到 0 2 gCr2 O3 /L以下。
Dihydroxydiphenylsulfone was synthesized from phenol,and an aryl sulfone carboxylic acid pretanning agent(DSCA)was prepared by condensing dihydroxydiphenylsulfone with formaldehyde and amino acid.The formation of aryl sulfone carboxylic acid in the pretanning agent was confirmed by capillary electrophoresis and infrared spectroscopy.It was found that the shrinkage temperature of pelt can be increased to 72℃ from 55℃,and the chrome content in effluent can be reduced to below 0.2gCr 2O 3/L by pretanning with DSCA.The physical properties of the leather are not much different from those of conventional chrome leather.
出处
《中国皮革》
CAS
北大核心
2004年第17期11-14,共4页
China Leather
关键词
二羟基二苯基砜
预鞣剂
芳香族合成鞣剂
高吸收铬鞣
dihydroxydiphenylsulfone pretanning agent aryl synthetic tanning agent high exhaustion chrome tanning
