发明名称 |
Method of recovering and concentrating an aqueous N-methylmorpholine-N-oxide (NMMO) solution |
摘要 |
This disclosure relates to a method of recovering and concentrating an aqueous N-methylmorpholine-N-oxide (NMMO) solution. |
申请公布号 |
US8932471(B2) |
申请公布日期 |
2015.01.13 |
申请号 |
US201113228946 |
申请日期 |
2011.09.09 |
申请人 |
Acelon Chemicals & Fiber Corporation |
发明人 |
Chou Wen-Tung;Lai Ming-Yi;Huang Kun-Shan;Tsai Hsiao-Chi;Kuo Chih-Chung |
分类号 |
B01D17/00;B01D1/26;D01F13/02 |
主分类号 |
B01D17/00 |
代理机构 |
Fish & Richardson P.C. |
代理人 |
Fish & Richardson P.C. |
主权项 |
1. A method of recovering and concentrating an aqueous N-methylmorpholine-N-oxide (NMMO) solution, comprising the steps of:
(a) introducing an aqueous NMMO solution, which has an NMMO concentration of less than 10 wt %, into a triple effect evaporator that includes serially connected first, second and third evaporation vessels; (b) concentrating the aqueous NMMO solution to obtain a first concentrated aqueous NMMO solution having an NMMO concentration ranging from 10 wt % to 20 wt % using the first evaporation vessel, and transferring the first concentrated aqueous NMMO solution to the second evaporation vessel; (c) concentrating the first concentrated aqueous NMMO solution to obtain a second concentrated aqueous NMMO solution having an NMMO concentration ranging from 22 wt % to 38 wt % using the second evaporation vessel, and transferring the second concentrated aqueous NMMO solution to the third evaporation vessel; and (d) concentrating the second concentrated aqueous NMMO solution to obtain a third concentrated aqueous NMMO solution having an NMMO concentration higher than 50 wt % using the third evaporation vessel. |
地址 |
Changhua Hsien TW |