发明名称 |
A PROCESS FOR CRACKING AN OLEFIN-RICH HYDROCARBON FEEDSTOCK |
摘要 |
A process for cracking an olefin-containing hydrocarbon feedstock which is selective towards light olefins in the effluent, the process comprising passing a hydrocarbon feedstock containing one or more olefins through a moving bed reactor containing a crystalline silicate catalyst selected from an MFI -type crystalline silicate having a silicon/aluminium atomic ratio of at least 180 and an MEL-type crystalline silicate having a silicon/aluminium atomic ration of from 150 to 800 which has been subjected to a steaming step, at an inlet temperature of from 500 to 600 DEG C, at an olefin partial pressure of from 0.1 to 2 bars and the feedstock being passed over the catalyst at an LHSV of from 5 to 30h<-1> to produce an effluent with an olefin content of lower molecular weight than that of the feedstock, intermittently removing a first fraction of the catalyst from the moving bed reactor, regenerating the first fraction of the catalyst in a regenerator and intermittently feeding into the moving bed reactor a second fraction of the catalyst which has been regenerated in the regenerator, the catalyst regeneration rate being controlled whereby the propylene purity is maintained constant at a value corresponding to the average value observed in a fixed bed reactor using the same feedstock, catalyst and cracking conditions, for example at least 94 wt%.
|
申请公布号 |
WO0228987(A1) |
申请公布日期 |
2002.04.11 |
申请号 |
WO2001EP11487 |
申请日期 |
2001.10.03 |
申请人 |
ATOFINA RESEARCH;DATH, JEAN-PIERRE;VERMEIREN, WALTER |
发明人 |
DATH, JEAN-PIERRE;VERMEIREN, WALTER |
分类号 |
C10G11/05;C10G11/16;(IPC1-7):C10G11/16 |
主分类号 |
C10G11/05 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|