公开(公告)号：US10106631B2

公开(公告)日：2018-10-23

申请号：US15319889

申请日：2014-06-20

Applicant: SABIC GLOBAL TECHNOLOGIES B.V. ,  Abderrahman Meddad ,  Mansour Taftaf ,  Hesham Al-Shobilly

Inventor： Abderrahman Meddad ,  Mansour Taftaf ,  Hesham Al-Shobilly

IPC: C08F110/06

Abstract: The invention relates to a process for the preparation of polypropylene having —a molecular weight (Mw) of 450,000-950,000, —a molecular weight distribution of 3-6, —a melt flow in the range of 7-14 dg/min measured with a load of 21.6 kg at 230° C. or 0.05-2 dg/min measured with a load of 2.16 kg at 230° C. and —a xylene soluble content of 2-6 wt % by converting propylene into the polypropylene 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, a co-catalyst and an external donor, wherein the catalyst component is obtained by a process wherein a compound with formula Mg(OAlk)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, and wherein the molar ratio of the co-catalyst to the external donor is 3.3-5.2, preferably 3.8-4.4.

公开(公告)号：US20250019468A1

公开(公告)日：2025-01-16

申请号：US18712084

申请日：2022-11-14

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Byron Smith John Rajarethnam ,  Musaad Al-Sadhan ,  Ravi Ranjan Kumar ,  Retheesh Madhusudanan Vanchiyil ,  Hesham Al-Shobilly ,  Erik René Delsman

IPC: C08F2/01 ,  B01J8/18 ,  B01J8/26 ,  C08F2/34 ,  C08F10/06

Abstract: Process for the polymerization of one or more monomers in a fluidized bed reactor, which reactor comprises a reaction zone which is confined at the underside by a gas distribution plate and at the top side by a virtual end surface, in which a fluidized bed is maintained between the underside and the top side, and in which at least part of the gaseous stream withdrawn from the top of the reactor is cooled to a point where the stream partially condenses into a liquid and in which at least part of the resulting two-phase stream is recycled to the reactor via an inlet which terminates in the reactor below the gas distribution plate, wherein, the reaction zone of the reactor is divided into two compartments by a draft tube extending from a point located above the gas distribution plate such that the area ratio of the circumferential draft tube inlet area (Ahb) to annular area (Aa) is between 0.5 to 3, preferably 2, to a point located below the end surface.

公开(公告)号：US20170129973A1

公开(公告)日：2017-05-11

申请号：US15319889

申请日：2014-06-20

Applicant: Abderrahman Meddad ,  Mansour Taftaf ,  Hesham Al-Shobilly ,  SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Abderrahman Meddad ,  Mansour Taftaf ,  Hesham Al-Shobilly

IPC: C08F110/06

CPC classification number: C08F110/06 ,  C08F2500/01 ,  C08F2500/12 ,  C08F2500/24 ,  C08F4/6565

Abstract: The invention relates to a process for the preparation of polypropylene having —a molecular weight (Mw) of 450,000-950,000, —a molecular weight distribution of 3-6, —a melt flow in the range of 7-14 dg/min measured with a load of 21.6 kg at 230° C. or 0.05-2 dg/min measured with a load of 2.16 kg at 230° C. and —a xylene soluble content of 2-6 wt % by converting propylene into the polypropylene 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, a co-catalyst and an external donor, wherein the catalyst component is obtained by a process wherein a compound with formula Mg(OAlk)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, and wherein the molar ratio of the co-catalyst to the external donor is 3.3-5.2, preferably 3.8-4.4.