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陕西省西乡县化工厂,充分利用本地盛产五倍子等优势,于1983年10月建起一条年产150吨单宁酸的生产线。1984年4月经陕西省汉中地区科研、大专院校、用户等二十个单位对新产品投产技术、质量进行鉴定,各项技术、质量指标均符合国家标准(附表),现已正式批量生产,上半年已有60吨试制品销往广西桂林、吉林长春和云南、陕西等地。该项产品的生产填补了西北地区固体单宁酸生产的空白。
Xixiang County Chemical Plant in Shaanxi Province made full use of local advantages such as gallnut production. In October 1983, a production line with an annual output of 150 tons of tannic acid was built. In April 1984, 20 units of scientific research institutes, colleges and universities, and users in the Hanzhong District of Shaanxi Province appraised the technology and quality of new product put into operation. The technical and quality indicators were all in compliance with the national standards (schedule), and they have now been mass-produced. In the first half of the year, 60 tons of trial products were sold to Guilin, Guilin, Changchun, Jilin, and Yunnan and Shaanxi. The production of this product fills the gap in the production of solid tannins in the Northwest Territories.