发明授权
- 专利标题: Composition of and process for forming polyalphaolefin drag reducing agents
- 专利标题(中): 形成聚α-烯烃减阻剂的组成和工艺
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申请号: US619840申请日: 1996-03-19
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公开(公告)号: US5869570A公开(公告)日: 1999-02-09
- 发明人: Gerald B. Eaton , Michael J. Monahan
- 申请人: Gerald B. Eaton , Michael J. Monahan
- 申请人地址: TX Houston
- 专利权人: Energy & Environmental International, L.C.
- 当前专利权人: Energy & Environmental International, L.C.
- 当前专利权人地址: TX Houston
- 主分类号: C08F2/08
- IPC分类号: C08F2/08 ; C08F2/44 ; C08F4/642 ; C08F10/00 ; C08F110/00 ; C08F210/00 ; C08F210/16 ; C08L23/00 ; C09K3/00 ; C10L1/16 ; C10M143/08 ; F17D1/16
摘要:
A composition including polyalphaolefins that function as drag reducing agents and a process for the preparation of polyalphaolefins that function as drag reducing agents are disclosed. The process includes contacting alphaolefin monomers with catalyst particles in a polymerization mixture that includes a hydrocarbon solvent. The polymerization of the alphaolefin monomers produces polyalphaolefin drag reducing agents having an inherent viscosity of at least 10 dL/g. During polymerization of the polyalphaolcfin monomers, localized micelles compromising high molecular weight polyalphaolefin polymer are formed in micellar zones around the catalyst particles. The polymerization is conducted in the presence of a viscosity reducing agent that includes a substantially hydrophobic dispersant. The viscosity reducing agent is present in an amount sufficient to reduce the viscosity of the reaction mixture and disperse the localized micelles. The addition of the dispersant during the polymerization process provides for high molecular weight polyalphaolefin and a more uniform molecular weight distribution of the resulting polyalphaolefin. A process of forming a polyalphaolefin drag reducing agent in one or more polymerization reactors and a process for reducing drag in a conduit are also disclosed.
公开/授权文献
- US4596400A Non-slipping device for skis 公开/授权日:1986-06-24
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