Invention Grant
- Patent Title: Process for transitioning between incompatible catalysts
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Application No.: US16063935Application Date: 2016-11-29
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Publication No.: US10822433B2Publication Date: 2020-11-03
- Inventor: Yahya Banat , Abdulaziz Hamad Al-Humydi , Said Fellahi
- Applicant: SABIC GLOBAL TECHNOLOGIES B.V.
- Applicant Address: NL Bergen op Zoom
- Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee Address: NL Bergen op Zoom
- Agency: Cantor Colburn LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@2feb4ad3
- International Application: PCT/EP2016/079099 WO 20161129
- International Announcement: WO2017/108347 WO 20170629
- Main IPC: C08F2/01
- IPC: C08F2/01 ; C08F2/34 ; B01J8/26 ; C08F2/00 ; C08F4/6592

Abstract:
The invention relates to a process for transitioning from a first continuous polymerization in a gas phase reactor conducted in the presence of a metallocene catalyst to a second polymerization conducted in the presence of a Ziegler-Natta catalyst in the gas phase reactor wherein the metallocene catalyst and the Ziegler-Natta catalysts are incompatible, the process comprising: (a) discontinuing the introduction of the metallocene catalyst into the gas phase reactor; (b) introducing an effective amount of cyclohexylamine into the reactor to at least partially deactivate the metallocene catalyst; (c) introducing an organometallic compound into the reactor and reacting the organometallic compound with cyclohexylamine; (d) degas the gas composition of the reactor and build up a new composition inside the reactor for the second polymerization with the Ziegler-Natta catalyst (e) introducing the Ziegler-Natta catalyst into the reactor.
Public/Granted literature
- US20200270373A1 PROCESS FOR TRANSITIONING BETWEEN INCOMPATIBLE CATALYSTS Public/Granted day:2020-08-27
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