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1. 发明公开

EP1294781A1 PROCESS FOR THE POLYMERISATION OF ISOBUTENE 有权
标题翻译：聚合方法异丁烯
公开(公告)号：EP1294781A1
公开(公告)日：2003-03-26
申请号：EP01940724.6
申请日：2001-06-14
申请人： BP Chemicals Limited , BP Chemicals S.N.C.
发明人： SAIT, Christian , BENAZZOUZ, Gacem
IPC分类号： C08F110/10 , C08F2/00 , G05B13/00
CPC分类号： C08F110/10 , Y10T436/12 , C08F2/00
摘要： A process for maintaining a property P of a polyisobutene around a target value V during a continuous polymerisation of isobutene in a reactor containing a boiling liquid reaction phase in equilibrium with a gas phase above the liquid phase. The process comprises continuously introducing, into the reactor, a catalyst and a C4 hydrocarbon feed and continuously withdrawing, from the reactor, the liquid reaction phase which is subsequently subjected, continuously, to at least one purification step to isolate the polyisobutene. The property P is chosen amongst the viscosity and the average molecular mass of the polyisobutene. The property P is maintained around the target value V (i) by measuring the isobutene partial pressure (PiC4) in the gas phase of the reactor, (ii) by calculating the isobutene concentration (CiC4 R2 ) in the boiling liquid reaction phase by means of a first model predicting the value of CiC4 R2 from the measured value of PiC4 and being based on liquid/vapor equilibrium law, (iii) by calculating an instantaneous value Pinst of the property P by means of a second model predicting the value of Pinst from the calculated value of CiC4 R2 and including at least one function of the isobutene polymerisation kinetics, and (iv) by varying at least one process parameter so as to make the instantaneous value Pinst tend towards the target value V.

2. 发明授权

EP1169363B1 ISOBUTENE POLYMERISATION PROCESS 有权
标题翻译：异丁烯聚合
公开(公告)号：EP1169363B1
公开(公告)日：2004-05-12
申请号：EP00907867.6
申请日：2000-03-09
申请人： BP Chemicals Limited , BP Chemicals S.N.C.
发明人： HERITIER, Jacques , PINEDE, Alain , SAIT, Christian
IPC分类号： C08F10/10 , C08F2/00
CPC分类号： C08F10/10 , C08F110/10 , G01N11/00 , G01N33/44 , C08F2/00 , C08F2500/17
摘要： The present invention relates to a process for the continuous polymerisation of isobutene while maintaining at a constant desired value a property P (viscosity or average molecular mass) of the polymer produced. The polymerisation is conducted in a reactor comprising a boiling liquid reaction phase which contains the monomer and the polymer being formed, in equilibrium with a gas phase on top of the said liquid phase, by continuous introduction into the reactor of a catalyst and of a C4 hydrocarbon feed mixture comprising the monomer, and by continuous withdrawal from the reactor of the liquid reaction phase, which is subsequently subjected continuously to at least one purification step which is intended to isolate the polyisobutene produced. The process comprises the determination of a target value V of the partial pressure piC4 of the isobutene in the gas phase of the reactor corresponding to the property P, by virtue of an empirical relationship established beforehand between the property P of the polyisobutene produced and piC4. During the polymerization, piC4 is measured and held constant at around the target value V by acting on the flow rate Qc of the catalyst introduced into the reactor and/or on the flow rate Qh of the C4 hydrocarbon feed mixture.

3. 发明授权

EP1294781B1 PROCESS FOR THE POLYMERISATION OF ISOBUTENE 有权
标题翻译：方法聚合异丁烯
公开(公告)号：EP1294781B1
公开(公告)日：2004-11-24
申请号：EP01940724.6
申请日：2001-06-14
申请人： BP Chemicals Limited , BP Chemicals S.N.C.
发明人： SAIT, Christian , BENAZZOUZ, Gacem
IPC分类号： C08F110/10 , C08F2/00 , G05B13/00
CPC分类号： C08F110/10 , Y10T436/12 , C08F2/00
摘要： A process for maintaining a property P of a polyisobutene around a target value V during a continuous polymerisation of isobutene in a reactor containing a boiling liquid reaction phase in equilibrium with a gas phase above the liquid phase. The process comprises continuously introducing, into the reactor, a catalyst and a C4 hydrocarbon feed and continuously withdrawing, from the reactor, the liquid reaction phase which is subsequently subjected, continuously, to at least one purification step to isolate the polyisobutene. The property P is chosen amongst the viscosity and the average molecular mass of the polyisobutene. The property P is maintained around the target value V (i) by measuring the isobutene partial pressure (PiC4) in the gas phase of the reactor, (ii) by calculating the isobutene concentration (CiC4 R2 ) in the boiling liquid reaction phase by means of a first model predicting the value of CiC4 R2 from the measured value of PiC4 and being based on liquid/vapor equilibrium law, (iii) by calculating an instantaneous value Pinst of the property P by means of a second model predicting the value of Pinst from the calculated value of CiC4 R2 and including at least one function of the isobutene polymerisation kinetics, and (iv) by varying at least one process parameter so as to make the instantaneous value Pinst tend towards the target value V.

4. 发明公开

EP1169363A1 ISOBUTENE POLYMERISATION PROCESS 有权
标题翻译：异丁烯聚合
公开(公告)号：EP1169363A1
公开(公告)日：2002-01-09
申请号：EP00907867.6
申请日：2000-03-09
申请人： BP Chemicals Limited , BP Chemicals S.N.C.
发明人： HERITIER, Jacques , PINEDE, Alain , SAIT, Christian
IPC分类号： C08F10/10 , C08F2/00
CPC分类号： C08F10/10 , C08F110/10 , G01N11/00 , G01N33/44 , C08F2/00 , C08F2500/17
摘要： The present invention relates to a process for the continuous polymerisation of isobutene while maintaining at a constant desired value a property P (viscosity or average molecular mass) of the polymer produced. The polymerisation is conducted in a reactor comprising a boiling liquid reaction phase which contains the monomer and the polymer being formed, in equilibrium with a gas phase on top of the said liquid phase, by continuous introduction into the reactor of a catalyst and of a C4 hydrocarbon feed mixture comprising the monomer, and by continuous withdrawal from the reactor of the liquid reaction phase, which is subsequently subjected continuously to at least one purification step which is intended to isolate the polyisobutene produced. The process comprises the determination of a target value V of the partial pressure piC4 of the isobutene in the gas phase of the reactor corresponding to the property P, by virtue of an empirical relationship established beforehand between the property P of the polyisobutene produced and piC4. During the polymerization, piC4 is measured and held constant at around the target value V by acting on the flow rate Qc of the catalyst introduced into the reactor and/or on the flow rate Qh of the C4 hydrocarbon feed mixture.

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