公开(公告)号：GB2184736A

公开(公告)日：1987-07-01

申请号：GB8629668

申请日：1986-12-11

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  ITO MITSURU ,  ITO KANEO ,  FUNAKOSHI YOSHIYUKI ,  NAKAJIMA AKAHIKO

IPC: B01J19/00 ,  C08F2/00 ,  C08F2/02 ,  C08F110/06 ,  C08F10/00

Abstract: Disclosed herein is a method for controlling the polymerization temperature in a polymerization apparatus equipped with a cooling system in which steam, which has occurred in the presence of a volatile liquid medium in a reaction system, is condensed in a reflux condenser and the resulting noncondensable gas and condensate are then returned to the reaction system, thereby removing the polymerization heat. A portion of the noncondensable gas is recirculated to the cooling system. The flow rate of the noncondensable gas to be recirculated and the flow rate of a cooling medium to be introduced into the reflux condenser are controlled in accordance with the temperature of the reaction system.

公开(公告)号：FI864953A

公开(公告)日：1987-06-12

申请号：FI864953

申请日：1986-12-03

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  ITO MITSURU ,  ITO KANEO ,  KIMURA SHIGERU ,  UCHIKAWA MOBUTAKA ,  FUJIO ICHIRO

IPC: B23Q39/02 ,  C08F2/00 ,  C08F297/08 ,  C08F

Abstract: A block copolymer of propylene is produced by using propylene itself as a liquid medium, conducting continuous polymerization (former-stage polymerization) of propylene alone or propylene and a small amount of ethylene at first and then conducting batchwise copolymerization (latter-stage polymerization) of ethylene and propylene. The amount of an activity improver to be added to a polymerization tank for the latter-stage polymerization and/or the polymerization time of the latter-stage polymerization are controlled in accordance with the amount of a slurry transferred from a polymerization tank for the former-stage polymerization to the polymerization tank for the latter-stage polymerization so as to maintain the ratio of the amount of the polymer polymerized by the former-stage polymerization to the amount of the polymer polymerized by the latter-stage polymerization constant in the block copolymer.

公开(公告)号：MX154183A

公开(公告)日：1987-06-03

申请号：MX18100380

申请日：1980-01-29

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE

IPC: C08F4/00 ,  C08F4/02 ,  C08F4/60 ,  C08F4/64 ,  C08F10/00

Abstract: Stereospecific polymerization of alpha -olefins is carried out with use of a catalyst comprising an activated titanium component obtained by treating copulverized products of magnesium halide, an organosilicon compound having at least one alkoxyl group and a halogenated hydrocarbon with titanium halide, an organoaluminum compound and an electron donative compound.

公开(公告)号：IT8622855D0

公开(公告)日：1986-12-23

申请号：IT2285586

申请日：1986-12-23

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  ITO MITSURU ,  ITO KANEO ,  FUNAKOSHI YOSHIYUKI ,  NAKAJIMA AKIHIKO

IPC: B01J19/00 ,  C08F2/00 ,  C08F2/02 ,  C08F110/06 ,  G01K

Abstract: Disclosed herein is a method for controlling the polymerization temperature in a polymerization apparatus equipped with a cooling system in which steam, which has occurred in the presence of a volatile liquid medium in a reaction system, is condensed in a reflux condenser and the resulting noncondensable gas and condensate are then returned to the reaction system, thereby removing the polymerization heat. A portion of the noncondensable gas is recirculated to the cooling system. The flow rate of the noncondensable gas to be recirculated and the flow rate of a cooling medium to be introduced into the reflux condenser are controlled in accordance with the temperature of the reaction system.

公开(公告)号：FI865277A0

公开(公告)日：1986-12-22

申请号：FI865277

申请日：1986-12-22

Applicant: MITSUI TOATSU CHEMICALS

Inventor： FUJIO ICHIRO ,  ITO KANEO ,  ASANUMA TADASHI

IPC: C08F293/00 ,  B01J19/18 ,  C08F2/00 ,  C08F2/01 ,  C08F297/08 ,  C08F

Abstract: A block copolymer of propylene is obtained with its quality kept uniform by first conducting continuous polymerization of propylene in a polymerization system (A, B), discharging a polymer slurry continuously from the polymerization system (A, B) into a batchwise polymerization tank (C, or C 2 ), and by feeding ethylene to the tank for conducting batchwise polymerization therein of ethylene and propylene. Subsequently, a copolymer slurry formed by the preceding batchwise polymerization is discharged, leaving at least a predetermined amount of unreacted ethylene in the tank (C 1 or C 2 ). Into the tank with the unreacted ethylene still left therein, are simultaneously charged polymer slurry from the polymerization system (A, B) and a deactivator, without supplying ethylene, and the deactivator charging rate is controlled in such a way that the partial pressure of ethylene in the vapor phase of the tank always reaches a predetermined value at the time point of completion of reception of the polymer slurry therein. After batch polymerization, a polymer slurry is fed to a flash tank (E) which functions to provide the block copolymer in powder form for collection in a receiver (F).

公开(公告)号：FR2578438A1

公开(公告)日：1986-09-12

申请号：FR8603012

申请日：1986-03-04

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  OHOKA TATUO ,  HINO MINORU ,  UCHIKAWA NOBUTAKA

IPC: C08F2/00 ,  B01D3/40 ,  C08F6/00 ,  C08F6/06 ,  C08F10/00

Abstract: A process for purifying a solvent suitable for use in the polymerization of an olefin in the presence of a Ziegler-Natta catalyst, which comprises feeding the polymerization solvent to a stage lower than a chimney tray of a multi-stage distillation column, said chimney tray being provided at a height between the top and bottom of the column, feeding an organoaluminum compound to a stage higher than the chimney tray, drawing out a condensate from the chimney tray, heating the condensate to produce heated vapor, introducing the heated vapor to the chimney tray or to a stage higher than the chimney tray but lower than the stage to which the organoaluminum compound has been fed, and drawing the solvent in a purified state from the top.

公开(公告)号：AU4107185A

公开(公告)日：1985-10-24

申请号：AU4107185

申请日：1985-04-12

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  OHOKA TATUO ,  UCHIKAWA NOBUTAKA

IPC: C08F6/00 ,  C08F6/24 ,  B01D43/00

Abstract: A process is provided herein wherein a solid polymer slurry diluted with a specific diluent is continuously discharged under controlled conditions from a high pressure zone to a low pressure zone substantially maintained at atmospheric pressure and the slurry is then separated into said diluent and dried polymer, the improvement wherein the discharged amount of the solid polymer slurry is strictly controlled by varying the heat in the second zone and simultaneously adding a diluent which is gaseous under normal temperature and pressure so that by the control of these two perimeters a continuous slurry discharge can be maintained at predetermined levels.

公开(公告)号：DE3513523A1

公开(公告)日：1985-10-17

申请号：DE3513523

申请日：1985-04-16

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  OHOKA TATUO ,  UCHIKAWA NOBUTAKA

IPC: C08F6/00 ,  C08F6/24 ,  C08G85/00

Abstract: A process is provided herein wherein a solid polymer slurry diluted with a specific diluent is continuously discharged under controlled conditions from a high pressure zone to a low pressure zone substantially maintained at atmospheric pressure and the slurry is then separated into said diluent and dried polymer, the improvement wherein the discharged amount of the solid polymer slurry is strictly controlled by varying the heat in the second zone and simultaneously adding a diluent which is gaseous under normal temperature and pressure so that by the control of these two perimeters a continuous slurry discharge can be maintained at predetermined levels.

公开(公告)号：ZA8103551B

公开(公告)日：1982-08-25

申请号：ZA8103551

申请日：1981-05-27

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  TADASHI ASANUMA ,  UCHIKAWA NOBUTAKA ,  NOBUTAKA UCHIKAWA ,  SHIOMURA TETSUNOSUKE ,  TETSUNOSUKE SHIOMURA

IPC: C08F4/00 ,  C08F4/02 ,  C08F4/50 ,  C08F4/60 ,  C08F4/64 ,  C08F4/642 ,  C08F10/00 ,  C08F10/02 ,  C08F

CPC classification number: C08F4/022 ,  C08F10/00 ,  C08F4/6543

公开(公告)号：DE3121470A1

公开(公告)日：1982-05-06

申请号：DE3121470

申请日：1981-05-29

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  UCHIKAWA NOBUTAKA ,  SHIOMURA TETSUNOSUKE

IPC: C08F4/00 ,  C08F4/02 ,  C08F4/50 ,  C08F4/60 ,  C08F4/64 ,  C08F4/642 ,  C08F10/00 ,  C08F10/02 ,  C08F4/52

Abstract: Stereospecific polymerization of alpha -olefins is carried out with use of a catalyst system comprising an activated titanium compound, an organoaluminum compound and an electron donative compound. The activated titanium compound is obtained by copulverizing magnesium halide, a halongenated hydrocarbon and an orthocarboxylic acid ester and then treating the copulverized product with titanium halide.