专利内容由知识产权出版社提供
专利名称：METHOD FOR TREATING WASTE SALINE
WATER PRODUCED IN PRODUCTIONPROCESS OF DIPHENYLMETHANEDIISOCYANATE (MDI)
发明人：Hongke Zhang,Weiqi Hua,Xiaogao
Liu,Zhenhua Zhao,Shuchang Sun,JianshengDing,Jianfeng Chen,Pengyuan Zhang,HaikuiZou,Guangwen Chu,Limin Xu
申请号：US13496872申请日：20090917
公开号：US20120168375A1公开日：20120705
摘要：The invention relates to a method of circular use of waste brine produced in themanufacture process of MDI, comprising the following steps: (1) the waste brine
produced in the manufacture process of MDI is subjected to a high-gravity extraction andthen to a column extraction, wherein said waste brine contains aniline,
diaminodiphenylmethane and polyamine; (2) the waste brine from step (1) is transmittedto a stripping tower for steam stripping; (3) the waste brine from the stripping tower ofstep (2) and a chemical oxidant are transmitted to an oxidation reactor to which air isblown for aeration; (4) the waste brine after the treatment of step (3) is transmitted to anabsorption tower for absorption. The invention makes the salt water have TOC of lessthan 8 ppm and TN of less than 2.5 ppm and achieves regeneration of resources in thewaste brine such as sodium chloride and water and the like for circular use.
申请人：Hongke Zhang,Weiqi Hua,Xiaogao Liu,Zhenhua Zhao,Shuchang Sun,JianshengDing,Jianfeng Chen,Pengyuan Zhang,Haikui Zou,Guangwen Chu,Limin Xu
地址：Beijing CN,Beijing CN,Beijing CN,Beijing CN,Beijing CN,Beijing CN,Beijing CN,BeijingCN,Beijing CN,Beijing CN,Beijing CN
国籍：CN,CN,CN,CN,CN,CN,CN,CN,CN,CN,CN
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