China Petroleum Chemical Corporation

Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation

Via Alliance Semiconductor Co., Ltd.

Shanghai Zhaoxin Semiconductor Co., Ltd.

Weili Li

Yuexiang Liu

Xianzhi Xia

Jin Zhao

Renqi Peng

Ping Gao

Yang Tan

Jigui Zhang

Zhihui Zhang

Suzhen Qiao

Yongtai Ling

Futang Gao

Xinsheng Wang

Tianyi Zhang

Ruilin Duan

Maoping Yin

Ying Li

Tao Liu

Long Chen

Qianli Di

Linna Yang

Chunhong Ren

Jie Lin

Xin Gao

Jianbin Wang

Changyou Ma

Xiaoyuan Yu

A carrier for an olefin polymerization catalyst contains a magnesium-containing compound and sulfur. The sulfur is at least one of an elemental sulfur, a complex sulfur, and a compound sulfur. The carrier has good particle morphology and a smooth surface, and has a narrow particle size distribution. The catalyst prepared from the carrier has high activity and good sensitivity to hydrogen regulation, and can improve the density of a polymer stack when being used for olefin polymerization.

Carrier for olefin polymerization catalyst, and preparation method therefor and application thereof

Disclosed are a catalyst component and a catalyst for olefin polymerization, and an olefin polymerization method. The catalyst component comprises magnesium, titanium, a halogen and an internal electron donor, wherein the internal electron donor comprises a monocarboxylic acid ester compound and a diether compound, and the molar ratio of the monocarboxylic acid ester compound to the diether compound is (0.0035-0.7):1. By using the catalyst, a polymer having both a high isotactic index and a high melt flow index can be prepared.

Catalyst component and catalyst for olefin polymerization, and application thereof

A cache memory for a processor including an arbiter, a tag array and a request queue. The arbiter arbitrates among multiple memory access requests and provides a selected memory access request. The tag array has a first read port receiving the selected memory access request and has a second read port receiving a prefetch request from a prefetcher. The tag array makes a hit or miss determination of whether data requested by the selected memory access request or the prefetch request is stored in a corresponding data array. The request queue has a first write port for receiving the selected memory access request when it misses in the tag array, and has a second write port for receiving the prefetch request when it misses in the tag array. The additional read and write ports provide a separate and independent pipeline path for handing prefetch requests.

Processor cache with independent pipeline to expedite prefetch request

A magnesium halide adduct represented by the formula (I): MgX.mROH.nE.pHO, in which X is chlorine, bromine, a C-Calkoxy, a C-Ccycloalkoxy or a C-Caryloxy, with the proviso that at least one X is chlorine or bromine; R is a C-Calkyl, a C-Ccycloalkyl or a C-Caryl; E is an o-alkoxybenzoate compound represented by the formula (II): in which Rand Rgroups are independently a C-Clinear or branched alkyl, a C-Ccycloalkyl, a C-Caryl, a C-Calkaryl or an C-Caralkyl, the Rand Rgroups are identical to or different from the R group; m is in a range of from 1.0 to 5.0; n is in a range of from 0.001 to 0.5; and p is in a range of from 0 to 0.8, is disclosed. A catalyst component useful in olefin polymerization, which comprises a reaction product of (1) the magnesium halide adduct, (2) a titanium compound, and optionally (3) an electron donor compound, is also disclosed. 

Spherical magnesium halide adduct, a catalyst component and a catalyst for olefin polymerization prepared therefrom

A parallelized multiple dispatch ordered queue including an ordered queue, qualify logic, ordered select logic, and dispatch logic. The ordered queue stores candidates in order from oldest to youngest into multiple entries. The ordered queue is divided into N groups in which an i'th group includes every i'th entry of every N entries of the ordered queue, wherein i is an integer less than or equal to N. The qualify logic determines whether any candidate is ready to be dispatched. The ordered select logic respectively determines the oldest candidate in each group that is ready to be dispatched. The dispatch logic dispatches the oldest ready candidates in parallel. The shift logic shifts the stored candidates in the ordered queue to fill any vacant entries between remaining ones of the stored candidates without changing an order of the remaining ones of the stored candidates in the ordered queue. The ordered queue may have any size or depth and N is any suitable integer determining the number of candidates (e.g., instructions) that may be dispatched in parallel.

Parallelized multiple dispatch system and method for ordered queue arbitration

Spherical carriers for an olefin polymerization catalyst, catalyst components, catalysts, and preparation methods therefor are disclosed. The method for preparing the spherical carriers comprises the following steps: (1) reacting, in the presence of at least one polymeric dispersion stabilizer, a magnesium halide with an organic compound containing active hydrogen to form a complex solution; (2) reacting said complex solution with an alkylene oxide-type compound to directly precipitate solid particles; and (3) recovering the solid particles to obtain spherical carriers. When a catalyst prepared by using the present spherical carrier is used in propylene polymerization, said catalyst exhibits high polymerization activity and high stereo-directing ability.

Spherical carriers for olefin polymerization catalyst, catalyst components, catalyst, and preparation methods therefor

The present invention provides a catalyst component for olefin polymerization and a preparation method thereof, and a catalyst for olefin polymerization and an application thereof. The catalyst component for olefin polymerization comprises reaction products of the following components: (1) a solid component; (2) at least one titanium compound; and (3) at least two internal electron donors, wherein the solid component comprises a magnesium compound represented by formula (1) and an epoxide represented by formula (2), wherein Ris a C-Clinear or branched alkyl; Rand Rare identical or different, and are independently hydrogen or unsubstituted or halogen-substituted C-Clinear or branched alkyl; X is halogen; m is in a range of from 0.1 to 1.9, n is in a range of from 0.1 to 1.9, and m+n=2. 

Catalyst component for olefin polymerization, preparation method thereof, and catalyst comprising same

A catalyst component for olefin polymerization is disclosed, which comprises at least one diol ester type electron donor compound (a) and at least one diether type electron donor compound (b) among others, wherein the molar ratio of a to b is 0.55-50. A preparation method of the catalyst component, a catalyst comprising the catalyst component, and an olefin polymerization method using the catalyst which can especially be used for preparation of polypropylenes of low ash contents are also disclosed.

Catalyst component for olefin polymerization and preparation method thereof

A spheric magnesium compound comprises a reaction product of at least the following components: (a) a magnesium halide having a formula of MgXR, wherein X is independently chloride or bromide, R is a C-Calkyl, a C-Caryl, a C-Calkoxy, or a C-Caryloxy, and n is 0 or 1; (b) an alcohol compound; and (c) an epoxy compound having a general formula (I), wherein Rand Rare independently hydrogen, a C-Clinear or branched alkyl, or a C-Clinear or branched haloalkyl. The magnesium compound has characteristic DSC curve and X-ray diffraction pattern, and can be used as a carrier for olefin polymerization catalyst.  

Carrier for olefin polymerization catalyst, preparation method and application thereof

A catalyst component for olefin polymerization is disclosed, which comprises a reaction product of the following components: (1) a spheric carrier; (2) a titanium compound; and optionally, (3) an electron donor, wherein the spheric carrier comprises a reaction product of at least the following components: (a) a magnesium halide represented by a general formula of MgXR, wherein X is independently chloride or bromide, R is a C-Calkyl, a C-Caryl, a C-Calkoxy, or a C-Caryloxy, and n is 0 or 1; (b) an alcohol compound; and (c) an epoxy compound represented by a general formula (I), wherein Rand Rare independently hydrogen, a C-Clinear or branched alkyl, or a C-Clinear or branched haloalkyl. When the catalyst of the invention is used in olefin polymerization, in particular in propylene polymerization, at least one of the following desired effects can be achieved: high polymerization activity of catalyst, high stereospecificity of catalyst, good hydrogen response of catalyst, high stereoregularity of polymer having high melt index, and low content of polymer fines. 

Catalyst component for olefin polymerization and catalyst comprising the same

A magnesium halide adduct is provided, comprising at least one compound of the formula MgXY, at least one compound of the formula ROH, methanol, at least one modifying agent chosen from DOE and o-hydroxy benzoates, and optionally water. Also provided herein are a catalyst component comprising the magnesium halide adduct, a catalyst for olefin polymerization comprising the catalyst component; the respective processes for preparing the magnesium halide adduct and the catalyst component; use of the magnesium halide adduct for preparing the catalyst component, use of the catalyst component in a catalyst for olefin polymerization and use of the catalyst in olefin polymerization; and a process of olefin polymerization.

Growing community of inventors

Beijing, China

Weili Li