| 发明名称 |
COMPOSITE POLYAMIDE MEMBRANE HAVING PREFERRED AZO CONTENT |
| 摘要 |
A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing an azo (—N═N—) content of from 0.75% to 0.95%, as measured by pyrolysis gas chromatography. |
| 申请公布号 |
US2016303520(A1) |
申请公布日期 |
2016.10.20 |
| 申请号 |
US201415102879 |
申请日期 |
2014.12.15 |
| 申请人 |
DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
Roy Abhishek;Cieslinski Robert C.;Gerhart Bruce B.;Hawn David D.;Paul Mou;Qiu XiaoHua;Rickard Mark A.;Rosenberg Steven;Tomlinson Ian A.;Zu Chengli |
| 分类号 |
B01D71/56;B01D69/12;B01D67/00 |
主分类号 |
B01D71/56 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing an azo (—N═N—) content of from 0.75% to 0.95%, as measured by pyrolysis gas chromatography using ammonium dichromate as a calibration standard and pyrolizing the polyamide layer at 550° C. for 6 seconds; wherein the azo content refers to the amount of diazonium and azo coupling resulting from two aromatic compounds coupled by an azo (—N═N—) group, and wherein the thin film polyamide layer is further characterized by producing a ratio of dimers represented by Formula II and III from 2.0% to 4.0% upon pyrolysis at 650° C. as measured by GS MS. |
| 地址 |
Midland MI US |
