[특허]Composition of and process for forming polyalphaolefin drag reducing agents

Composition of and process for forming polyalphaolefin drag reducing agents 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08L-023/00
출원번호	US-0619840 (1996-03-19)
발명자 / 주소	Eaton Gerald B. Monahan Michael J.
출원인 / 주소	Energy & Environmental International, L.C.
대리인 / 주소	Tobor & Goldstein, L.L.P.
인용정보	피인용 횟수 : 8 인용 특허 : 51

초록 ▼

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.

대표청구항 ▼

[ What is claimed:] [1.] A liquid phase polymerization process for forming a liquid polyalphaolefin drag reducing agent, comprising:contacting alpha olefin monomers with catalyst particles in a liquid phase polymerization mixture comprising a hydrocarbon solvent, wherein said hydrocarbon solvent is selected from the group consisting of aromatic, alicyclic and aliphatic hydrocarbons; andpolymerizing said alpha olefin monomers to provide a liquid polyalphaolefin having an inherent viscosity of at least 10 deciliters per gram; reinduring said liquid phase polymerization at least a portion of said alpha olefin monomers polymerize in said liquid phase polymerization mixture to form localized micelles comprising high molecular weight liquid polyalphaolefin polymer in micellar zones around said catalyst particles; andsaid liquid phase polymerization is conducted in the presence of a viscosity reducing agent comprising a substantially hydrophobic dispersant, said viscosity reducing agent being present in an amount sufficient to reduce the viscosity of the liquid phase polymerization mixture and disperse said localized micelles.

이 특허에 인용된 특허 (51)

Samsel Edward G. (Baton Rouge LA) Eisenberg David C. (Baton Rouge LA), Actinide catalyzed chain growth process.
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Aubanel Marie-Line (Saint Mitre-les-Ramparts FRX) Bailly Jean C. (Martigues FRX), Amorphous high molecular weight copolymers of ethylene and alpha-olefins.
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Mack Mark P. (Ponca City OK), Catalyst and method for preparation of drag reducing substances.
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Mack Mark P. (Ponca City OK), Catalyst and method for preparation of drag reducing substances.
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Welch M. Bruce (Bartlesville OK) Barbee Paul (Dewey OK), Catalyst compositions and olefin polymerization.
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Inahara Kiyoshi (Mie JPX) Yano Akihiro (Mie JPX), Catalyst for polymerization of olefin and process for production of olefin polymer.
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Hlatky Gregory G. (Houston TX) Turner Howard W. (Webster TX), Catalyst system of enhanced productivity.
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Collette Herve (Namur BEX) Pamart Sabine (Mons BEX), Catalytic system which may be used for the polymerization of alpha-olefins and process for this polymerization.
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Gessell Donald E. (Friendswood TX) Washecheck Paul H. (Friendswood TX), Composition and method for friction loss reduction.
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Gessell Donald E. (Friendswood TX) Hosman Donald P. (Ponca City OK), Composition and process for friction loss reduction.
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Pomeroy John M. (Jackson NJ), Dissolution performance by injection through a die-type nozzle.
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Johnston Ray L. (Ponco City OK) Fry Larry G. (Ponco City OK), Drag reducers for flowing hydrocarbons.
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Coleman ; III William M. (Lake Jackson TX) Schmidt Gregory F. (Midland MI) Campbell ; Jr. Richard E. (Midland MI) Delaney Mark S. (Midland MI), Heterogeneous organometallic catalysts containing a supported titanium compound and at least one other supported organom.
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Supcoe Robert F. (Annapolis MD) Evans Allan P. (Annapolis MD), High concentration slurry-formulation and application.
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Ewen John A. (Houston TX), Isotactic-stereoblock polymers of alpha-olefins and process for producing the same.
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Miyake Shigenobu (Oita JPX) Kibino Nobuyuki (Oita JPX) Monoi Takashi (Oita JPX) Ohira Hiroyuki (Oita JPX) Inazawa Shintaro (Oita JPX), Metallocene and process for producing polyolefin using the same.
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Jejelowo Moses O. (Kingwood TX), Metallocene catalysts and their production and use.
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Baxter Steven L. (Ponca City OK) Lewis Max H. (Waverly TN), Method for improving the performance of highly viscous concentrates of high molecular weight drag reducing polymers.
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Mack Mark P. (Ponca City OK), Method for producing solutions of drag reducing substances.
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Ubels Sibrand A. (Waterloo OK BEX) Baxter Steven L. (Ponca City OK), Method for reducing pressure drop in the transportation of drag reducer.
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Gustafsson Bill (Porvoo FIX) Kostiainen Arja (Porvoo FIX) Sormunen Pekka (Porvoo FIX), Method for the preparation of a polymerizing catalyst component, a polymerizing catalyst component prepared by the metho.
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Mack Mark P. (Ponca City OK) Decker ; Jr. Lewis B. (Lake Charles LA) Wallace Adrian L. (Lake Charles LA), Method for the preparation of non-crystalline polymers of high molecular weight.
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Shamshoum Edwar S. (Houston TX) Elder Michael J. (Friendswood TX) Reddy Baireddy R. (Baytown TX) Rauscher David J. (Webster TX), Method of making a homogeneous-heterogenous catalyst system for olefin polymerization.
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Yamazaki Isamu (Tokyo JA) Toyama Yoichi (Tokyo JA) Hirota Kiwami (Yokohama JA) Takeuchi Hisashi (Tokyo JA), Method of polymerizing a 상세보기

IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Composition of and process for forming polyalphaolefin drag reducing agents 원문보기

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Composition of and process for forming polyalphaolefin drag reducing agents 원문보기

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