公开(公告)号：US20180230251A1

公开(公告)日：2018-08-16

申请号：US15750960

申请日：2016-07-27

Applicant: SABIC Global Technologies B.V.

Inventor： Yahya Banat ,  Ahmad Abdullah Alshaiban ,  Osamah Maidan

IPC: C08F10/06 ,  B01J8/20 ,  B01J8/18

CPC classification number: C08F10/06 ,  B01J8/08 ,  B01J8/1836 ,  B01J8/1863 ,  B01J8/20 ,  B01J2208/00168 ,  B01J2208/00938 ,  C08F2/01 ,  C08F2/34 ,  C08F110/06 ,  C08F210/06 ,  C08F2500/04 ,  C08F2500/17 ,  C08F4/6465 ,  C08F4/6546

Abstract: The present invention relates to a process for the continuous preparation of polypropylene in a reactor from propylene and optionally ethylene and/or at least one other oolefin monomer, wherein the reactor comprises a fluidized bed, an expanded section located at or near the top of the reactor, a distribution plate located at the lower part of the reactor and an inlet for a recycle stream located under the distribution plate, wherein the process comprises—feeding a polymerization catalyst to the fluidized bed in the area above the distribution plate—feeding the propylene and the optional at least one other oolefin monomer to the reactor—withdrawing the polypropylene from the reactor—circulating fluids from the top of the reactor to the bottom of the reactor, wherein the circulating fluids are compressed using a compressor and cooled using a heat exchanger, resulting in a cooled recycle stream comprising liquid, and wherein the cooled recycle stream is introduced into the reactor using the inlet for the recycle stream wherein an alkane chosen from the group of iso-butane, n-butane, cyclopropane and mixtures thereof is added to the reactor and wherein the molar composition of the components in the recycle stream is chosen such that the dew temperature of the recycle stream at the reactor pressure is at least 0.10° C. below the temperature of the reactor

公开(公告)号：US09988474B2

公开(公告)日：2018-06-05

申请号：US15320040

申请日：2015-06-16

Applicant: SABIC Global Technologies B.V.

Inventor： Hesham A. Al-Shobilly ,  Ahmad Abdullah Alshaiban ,  Abdulrahman Albeladi ,  Abderrahman Meddad ,  Riyadh A. Al Humoud

IPC: C08F210/06

CPC classification number: C08F210/06 ,  C08F4/6565 ,  C08F4/651 ,  C08F210/16 ,  C08F2500/01 ,  C08F2500/12 ,  C08F2500/24 ,  C08F2500/18

Abstract: The invention relates to a process for the preparation of ethylene-propylene copolymers having —a weight average molecular weight of 800,000-1,800,000, —a molecular weight distribution of 3-8, —an ethylene content of 1-10 wt %, preferably 1.5 to 5.5 wt %. —a melt flow in the range of 1.5-8 dg/min measured with a load of 21.6 kg at 230° C. and —a xylene soluble content of 2-15 wt % by converting propylene into the UHMWEP copolymer without pre-polymerization in the presence of a polymerization catalyst under a condition where the volume ratio of H2 to propylene is at most 0.0020, wherein the catalyst comprises a catalyst component and a co-catalyst, wherein the catalyst component is obtained by a process wherein a compound with formula Mg(OAIk)xCly wherein x is larger than 0 and smaller than 2, y equals 2−x and each Alk, independently, represents an alkyl group, is contacted with a titanium tetraalkoxide and/or an alcohol in the presence of an inert dispersant to give an intermediate reaction product and wherein the intermediate reaction product is contacted with titanium tetrachloride in the presence of an internal donor.