发明名称 |
Integrated dimethyl ether recovery from an oxygenate-to-olefins process and production of polypropylene |
摘要 |
Provided is a method of producing polypropylene comprising contacting an oxygenate stream with a molecular sieve to form an olefin stream comprising propane, propylene and dimethylether; introducing the olefin stream into a propylene rectification tower possessing from less than 200 theoretical stages; withdrawing from the propylene rectification tower a bottom stream comprising dimethylether, a sidestream comprising propane, and an overhead stream comprising propane and propylene; introducing the overhead to a condenser to accumulate a propylene-rich stream; passing the propylene-rich stream to a splitter to produce (i) a first propylene stream that is introduced into a polypropylene reactor to contact a polyolefin catalyst, and (ii) a second propylene stream that is re-introduced into the rectification tower, the first and second propylene streams introduced at a desirable ratio; and recirculating the dimethylether stream to contact the molecular sieve. |
申请公布号 |
US8207387(B2) |
申请公布日期 |
2012.06.26 |
申请号 |
US20100772276 |
申请日期 |
2010.05.03 |
申请人 |
MCGLAMERY, JR. GERALD G.;SMITH LAWRENCE C.;BANCROFT JENNIFER L.;EXXONMOBIL CHEMICAL PATENTS INC. |
发明人 |
MCGLAMERY, JR. GERALD G.;SMITH LAWRENCE C.;BANCROFT JENNIFER L. |
分类号 |
C07C2/06;C07C1/207 |
主分类号 |
C07C2/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|