制备和表征了在食品及制药业中广泛使用的天然低氯漂白紫胶。
The bleached natural shellac product with low chlorine content was prepared by means of catalytic hydrogenation of the bleached shellac in the presence of Ni-Fe binary-metal catalyst and hydrogen.
介绍了漂白胶的美国市场及广东紫胶生产的概况。
The situations of bleached lac in American market and the outlines of lac production in Guangdong province are introduced.
本文研究了紫胶树脂在漂白和脱氯过程中分子量、热寿命、酸价、碘价、羟基值和氯含量的变化情况。
The changes of molecular weight, life under heat, acid value, hydroxyl value and chlorine content of lac resin during bleaching and de-chlorinating processes have been studied.
应用推荐