公开(公告)号：CA2281656A1

公开(公告)日：1998-08-27

申请号：CA2281656

申请日：1998-02-18

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： WILLIAMS CLARK CURTIS ,  RAMAMURTHY ARAKALGUD VENKATAPA ,  GOODE MARK GREGORY

IPC: B05B1/02 ,  B01J8/00 ,  B01J8/24 ,  B01J10/00 ,  B01J19/24 ,  B01J19/26 ,  B05B7/04 ,  C08F2/01 ,  C08F2/34 ,  C08F10/00 ,  C08F210/16

Abstract: The present invention teaches the use of an effervescent nozzle to deliver liquid catalyst to a gas phase polymerization system.

公开(公告)号：GR3029597T3

公开(公告)日：1999-06-30

申请号：GR990400684

申请日：1999-03-05

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： WAGNER BURKHARD ERIC ,  RAMAMURTHY ARAKALGUD VENKATAPA

IPC: C08F2/00 ,  C08F2/34 ,  C08F4/60 ,  C08F4/658 ,  C08F10/00 ,  C08F10/02 ,  C08F210/16 ,  C08L23/04 ,  C08L23/08 ,  C08F4/654

公开(公告)号：CA2163467C

公开(公告)日：1999-04-13

申请号：CA2163467

申请日：1995-11-22

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： WAGNER BURKHARD ERIC ,  RAMAMURTHY ARAKALGUD VENKATAPA

IPC: C08F2/00 ,  C08F2/34 ,  C08F4/60 ,  C08F4/658 ,  C08F10/00 ,  C08F10/02 ,  C08F210/16 ,  C08L23/04 ,  C08L23/08

Abstract: A process for the production of an in situ particulate polyethylene blend comprising contacting a magnesium/titanium based catalyst system including a particulate precursor with one or more alpha-olefins in each of two reactors connected in series, in the gas phase, with the provisos that: (a) the particulate precursor has a particle size distribution span of no greater than about 1.5; and (b) a high molecular weight polymer is formed in one reactor and a low molecular weight polymer is formed in one other reactor wherein the ratio of molecular weights of the high molecular weight polymer to low molecular weight polymer in the final product is at least about 8:1.

公开(公告)号：DE69507436D1

公开(公告)日：1999-03-04

申请号：DE69507436

申请日：1995-11-22

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： WAGNER BURKHARD ERIC ,  RAMAMURTHY ARAKALGUD VENKATAPA

IPC: C08F2/00 ,  C08F2/34 ,  C08F4/60 ,  C08F4/658 ,  C08F10/00 ,  C08F10/02 ,  C08F210/16 ,  C08L23/04 ,  C08L23/08 ,  C08F4/654

公开(公告)号：ZA9801300B

公开(公告)日：1998-08-28

申请号：ZA9801300

申请日：1998-02-17

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： WILLIAMS CLARK CURTIS ,  GOODE MARK GREGORY ,  RAMAMURTHY ARAKALGUD VENKATAPA

IPC: B05B1/02 ,  B01J8/00 ,  B01J8/24 ,  B01J10/00 ,  B01J19/24 ,  B01J19/26 ,  B05B7/04 ,  C08F2/01 ,  C08F2/34 ,  C08F10/00 ,  C08F210/16 ,  C08F ,  B01J ,  B05B

CPC classification number: B01J8/1827 ,  B01J8/0015 ,  B01J19/26 ,  B01J2208/00672 ,  B01J2219/00164 ,  B01J2219/00182 ,  B01J2219/00186 ,  B05B7/0433 ,  B05B7/0466 ,  C08F10/00 ,  C08F210/16 ,  Y10S526/901 ,  Y10S526/904 ,  Y10S526/943 ,  C08F2/34 ,  C08F210/14 ,  C08F2500/18 ,  C08F2500/08 ,  C08F2500/24

公开(公告)号：AU1148495A

公开(公告)日：1996-01-18

申请号：AU1148495

申请日：1995-01-31

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： DANIELL PAUL THEODORE ,  TILSTON MICHAEL WILLIAM ,  SPRIGGS THOMAS EDWARD ,  WAGNER BURKHARD ERIC ,  RAMAMURTHY ARAKALGUD VENKATAPA

IPC: C08J5/18 ,  C08F2/00 ,  C08F2/34 ,  C08F4/60 ,  C08F4/654 ,  C08F10/00 ,  C08F210/02 ,  C08F297/08 ,  C08L23/08 ,  C08L23/16

Abstract: 1. A gas phase process for the production of a polyethylene blend comprising contacting ethylene and at least one alpha-olefin comonomer having 3 to 8 carbon atoms with a magnesium/titanium based catalyst system including an activator and a cocatalyst in each of two fluidized bed reactors connected in series, under polymerization conditions, with the provisos that:(a) the mixture of ethylene copolymer matrix and active catalyst formed in the first reactor in the series is transferred to the second reactor in the series;(b) other than the active catalyst referred to in proviso (a) and the cocatalyst referred to in proviso (e), no additional catalyst is introduced into the second reactor;(c) in the first reactor in which a low melt index copolymer is made:(1) the alpha-olefin is present in a ratio of from 0.01 to from 0.4 mole of alpha-olefin per mole of ethylene;(2) optionally, hydrogen is present in a ratio of from 0.001 to from 0.3 mole of hydrogen per mole of ethylene; and(3) the ethylene partial pressure is at least from 40 pounds per square inch; and(d) in the second reactor in which a high melt index copolymer is made:(1) the alpha-olefin is present in a ratio of from 0.005 to from 0.6 mole of alpha-olefin per mole of ethylene;(2) hydrogen is present in a ratio of from 1 to from 3 moles of hydrogen per mole of ethylene; and(3) diethyl zinc is added in an amount of from 2 to from 40 moles of diethyl zinc per mole of titanium; and(e) additional hydrocarbyl aluminum cocatalyst is introduced into the second reactor in an amount sufficient to restore the level of activity of the catalyst transferred from the first reactor to from the initial level of activity in the first reactor.

公开(公告)号：ES2215571T3

公开(公告)日：2004-10-16

申请号：ES00304435

申请日：2000-05-25

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： RAMAMURTHY ARAKALGUD VENKATAPA ,  WILLIAMS CLARK CURTIS

IPC: C08F2/00 ,  B01J8/00 ,  B01J8/18 ,  B01J8/20 ,  B01J8/40 ,  B01J19/26 ,  C08F2/34 ,  C08F10/00 ,  C08F10/02

Abstract: Liquid catalyst composition is fed to a fluidized bed olefin polymerization reactor through an ultrasonic nozzle, enabling improved control over average catalyst composition droplet size and size distribution, which provides better control over resin particle size. The spray may be surrounded by a shroud of gas which creates a particle lean zone, thus reducing the likelihood of contact by the catalyst composition with existing product particles already suspended in the fluid bed.

公开(公告)号：DE60008314D1

公开(公告)日：2004-03-25

申请号：DE60008314

申请日：2000-05-25

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： RAMAMURTHY ARAKALGUD VENKATAPA ,  WILLIAMS CLARK CURTIS

IPC: C08F2/00 ,  B01J8/00 ,  B01J8/18 ,  B01J8/20 ,  B01J8/40 ,  B01J19/26 ,  C08F2/34 ,  C08F10/00 ,  C08F10/02

Abstract: Liquid catalyst composition is fed to a fluidized bed olefin polymerization reactor through an ultrasonic nozzle, enabling improved control over average catalyst composition droplet size and size distribution, which provides better control over resin particle size. The spray may be surrounded by a shroud of gas which creates a particle lean zone, thus reducing the likelihood of contact by the catalyst composition with existing product particles already suspended in the fluid bed.

公开(公告)号：AT259672T

公开(公告)日：2004-03-15

申请号：AT00304435

申请日：2000-05-25

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： RAMAMURTHY ARAKALGUD VENKATAPA ,  WILLIAMS CLARK CURTIS

IPC: C08F2/00 ,  B01J8/00 ,  B01J8/18 ,  B01J8/20 ,  B01J8/40 ,  B01J19/26 ,  C08F2/34 ,  C08F10/00 ,  C08F10/02

Abstract: Liquid catalyst composition is fed to a fluidized bed olefin polymerization reactor through an ultrasonic nozzle, enabling improved control over average catalyst composition droplet size and size distribution, which provides better control over resin particle size. The spray may be surrounded by a shroud of gas which creates a particle lean zone, thus reducing the likelihood of contact by the catalyst composition with existing product particles already suspended in the fluid bed.

公开(公告)号：AU768842B2

公开(公告)日：2004-01-08

申请号：AU3647200

申请日：2000-05-26

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： RAMAMURTHY ARAKALGUD VENKATAPA ,  WILLIAMS CLARK CURTIS

IPC: C08F2/00 ,  B01J8/00 ,  B01J8/18 ,  B01J8/20 ,  B01J8/40 ,  B01J19/26 ,  C08F2/34 ,  C08F10/00 ,  C08F10/02 ,  C08F4/642

Abstract: Liquid catalyst composition is fed to a fluidized bed olefin polymerization reactor through an ultrasonic nozzle, enabling improved control over average catalyst composition droplet size and size distribution, which provides better control over resin particle size. The spray may be surrounded by a shroud of gas which creates a particle lean zone, thus reducing the likelihood of contact by the catalyst composition with existing product particles already suspended in the fluid bed.