【摘要】 五倍子主产我国,年产量近4000吨,是生产单宁酸、没食子酸、连苯三酚的原料。不仅国内需要,而且可出口创汇。目前五倍子单宁已在医药、冶金、合成纤维印染固色、石油钻井、金属防锈蚀等方面得到了广泛的应用,供不应求,发展我国五倍子生产在国民经济中具有重要意义。更多还原

【Abstract】 China is mainly origin of gall nut and its output is about 4000 tons every year.The gall nut contains more than 60%tannin,which is raw materials of producing tannic acid,gallic acid and pyrogallol.The gallotan- nins have been widely used in industries shch as medical industry,metallur- gical industry,ect.更多还原