公开(公告)号：US3756996A

公开(公告)日：1973-09-04

申请号：US3756996D

申请日：1971-02-25

Applicant: NAT DISTILLERS CHEM CORP

Inventor： PUGH D ,  PALMER W ,  HORNEY R ,  SPOMER R ,  WOLFENBERGER C

IPC: B01F7/00 ,  B01F15/00 ,  B01J3/04 ,  B01J19/00 ,  B01J19/18 ,  B01J19/20 ,  C08F2/00 ,  C08F10/00 ,  C08F1/60 ,  C08F3/04

CPC classification number: B01F7/0025 ,  B01F7/00141 ,  B01F7/00908 ,  B01J3/042 ,  B01J19/002 ,  B01J19/18 ,  B01J19/20 ,  B01J2219/00063 ,  B01J2219/00094 ,  B01J2219/00155 ,  B01J2219/00159 ,  B01J2219/00779 ,  B01J2219/185 ,  C08F10/00 ,  C08F4/28

Abstract: A PROCESS AND APPARATUS FOR THE PRODUCTION OF ETHYLENE POLYMERS AT HIGH PESSURES WITHIN A MODIFIED, STIRRED AUTOCLAVE-TYPE REACTION SYSTEM SUBDIVEDED INTO THREE ZONES, INTO THE FIRST OF WHICH A FIRST, LOW TEMPERATURE FREE RADICAL, CHAIN-INITATING CATALYST IS FED, AND INTO THE SECOND OF WHICH A SECOND, INTERMEDIATE TEMPERATURE FREE RADICAL, CHAIN-INITATING CATALYST AND A THIRD, HIGH TEMPERATURE FREE RADICAL, CHAIN-INITIATING CATALYST ARE INTRODUCED. THE FIRST ZONE IS SO AGITATED AS TO PRODUCE BOTH RADIAL AND END-TOEND MIXING THEREIN TO THEREBY ESTABLISH A SIBSTANTIALLY UNIFORM REACTION TEMPERATURE THEREIN, WHEREAS THE SECOND ZONE IS SO AGITATED AS TO PRODUCE RADIAL MIXING THEREIN, WITH THE DEGREE OF END-TO-END MIXING DECREADING LONGITUDINALLY OF THE ZONE TO THEREBY ESTABLISH A TEMPERATURE DIFFERENTIAL LONGITUDINALLY THEREOF. BOTH RADIAL AND ENDTO-END MIXING ARE ESTABLISHED WITHIN THE THIRD ZONE IN A MANNER SUCH AS TO INCREASE BACK MIXING OF THE REACTION MIXTURE THEREIN, AND THEREBY CONTROL THE TEMPERATURE OF THE REACTION MIXTURE LEAVING SUCH ZONE AND EXITING FROM THE REACTION SYSTEM.

公开(公告)号：US3708410A

公开(公告)日：1973-01-02

申请号：US3708410D

申请日：1970-02-13

Applicant: NAT DISTILLERS CHEM CORP

Inventor： PLATZ G ,  PALMER W ,  MAUCK J

IPC: B01F7/00 ,  B01F15/00 ,  B01J19/08 ,  C08F2/00 ,  C08F10/00 ,  G21K5/02 ,  B01J1/00 ,  B01J1/10

CPC classification number: B01F7/00008 ,  B01J19/082 ,  B01J2219/00063 ,  B01J2219/00094 ,  B01J2219/00164 ,  B01J2219/00189 ,  B01J2219/182 ,  B01J2219/185 ,  C08F10/00 ,  G21K5/02 ,  Y10T137/6866 ,  C08F2/48

Abstract: A polymerization reactor having a hollow stirrer drum which is an elongated drum having apertures therethrough with paddles extending across the apertures. The stirrer drum is concentrically disposed about an elongated source of gamma radiation which serves as the energy source for a polymerization reaction of material introduced into the reactor. The stirrer drum divides the reactor into two concentric and approximately equal volumes, one internal of the stirrer drum and one external of the stirrer drum, with the material being stirred and inter-mixed between the two chambers through the paddle apertures by rotation of the stirrer drum.

公开(公告)号：US3820960A

公开(公告)日：1974-06-28

申请号：US19609971

申请日：1971-11-05

Applicant: NAT DISTILLERS CHEM CORP

Inventor： PLATZ G ,  PALMER W ,  MAUCK J

IPC: B01F7/00 ,  B01F15/00 ,  B01J19/08 ,  B01J19/18 ,  B01J19/20 ,  C08F2/00 ,  C08F2/46 ,  C08F10/00 ,  G21K5/02 ,  G21K5/10 ,  C08F1/98

CPC classification number: B01F7/0025 ,  B01J19/082 ,  B01J19/18 ,  B01J19/20 ,  B01J2219/00063 ,  B01J2219/00094 ,  B01J2219/00164 ,  B01J2219/00189 ,  B01J2219/182 ,  B01J2219/185 ,  G21K5/02 ,  G21K5/10

Abstract: A polymerization reactor having a hollow stirrer drum which is an elongated drum having apertures therethrough with paddles extending across the apertures. The stirrer drum is adapted to be concentrically disposed about an elongated source of gamma radiation which serves as the energy source for a polymerization reaction of material introduced into the reactor. The stirrer drum divides the reactor into two concentric and approximately equal volumes, one internal of the stirrer drum and one external of the stirrer drum, with the material being stirred and intermixed between the two chambers through the paddle apertures by rotation of the stirrer drum.