基本信息:
- 专利标题： 一种从湿法磷酸生产的稀磷酸中回收碘的方法
- 专利标题（英）：Method for recycling iodine from diluted phosphoric acid for phosphoric acid manufacture with wet-process
- 申请号：CN200810302681.1 申请日：2008-07-10
- 公开(公告)号：CN101318625A 公开(公告)日：2008-12-10
- 发明人： 王景峰 , 陈肖虎 , 刘辉 , 樊囿宇 , 柳玉松 , 陈庆 , 杨丽萍 , 黄光柱 , 查少华 , 杨善志
- 申请人： 贵州大学 , 瓮福(集团)有限责任公司
- 申请人地址： 贵州省贵阳市蔡家关贵州大学科技处
- 专利权人： 贵州大学,瓮福(集团)有限责任公司
- 当前专利权人： 瓮福(集团)有限责任公司
- 当前专利权人地址： 贵州省贵阳市蔡家关贵州大学科技处
- 代理机构： 贵阳中新专利商标事务所
- 代理人： 郭防
- 主分类号： C01B7/14
- IPC分类号： C01B7/14
The invention discloses a method for recovering iodine from dilute phosphoric acid in phosphoric acid production with a wet method; iodine is extracted from the dilute phosphoric acid generated in the iodine-containing phosphorus ore production process, wherein, the content of iodine in the dilute phosphoric acid is 50-110mg/L, the concentration of P2O5 in the dilute phosphoric is 25-30%, compound oxidant is added into the phosphoric acid for oxidation reaction, air is used for blowing molecular iodine out, then SO2-containing acidic solution is used for absorbing, the pH value of absorption liquid is between 1-6, then hydrogen peroxide is added to separate iodine out and filtration and separation are carried out to obtain finished iodine. The compound oxidant obtained from the tests conducted by the applicant can improve the efficiency of oxidant and reduce the dosage of oxidant. Proved by the tests performed by the applicant, after the hydrogen peroxide is added with vanadic oxide, the dosage of oxidant can be reduced by 30%; at present, the actual amount of the hydrogen peroxide used for producing 1 ton iodine is 20 tons.
公开/授权文献:
- CN101318625B 一种从湿法磷酸生产的稀磷酸中回收碘的方法 公开/授权日：2010-06-09