摘要:
The invention relates to a dialkoxyl magnesium carrier, which is a product produced by a reflux reaction of magnesium, an alcohol and mixed halogenated agents under an inert atmosphere. The mixed halogenated agents are iodine and magnesium chloride, and the weight ratio between iodine and magnesium chloride is 0.05:1-1:0.01. The dialkoxyl magnesium carrier is spheroid with uniform particle size distribution, excellent particle morphology and high bulk density. A solid catalyst component and a catalyst based on this carrier for olefin polymerization are also provided, and olefin polymers having a wide molecular weight distribution, good stereoregularity, excellent particle morphology and a low content of fine powders can be obtained.
摘要:
Disclosed is a solid catalyst component for olefin polymerization. The catalyst component comprises a dialkoxy magnesium carrier, a titanium compound, and a product from an internal electron donor reacting in an inert solvent. The internal electron donor compound comprises a 2,3-di-non-linear-alkyl-2-cyano succinic acid diester compound as presented in formula I.
摘要:
Disclosed is a solid catalyst component for olefin polymerization. The catalyst component comprises a dialkoxy magnesium carrier, a titanium compound, and a product from an internal electron donor reacting in an inert solvent. Said internal electron donor compound comprises a 2,3-di-non-linear-alkyl-2-cyano succinic acid diester compound as presented in formula I: as in formula I, R1 and R2 radicals are independently chosen from linear or branched C1-C4 alkyl groups; R is chosen from C3-C6 iso-alkyl, sec-alkyl, or cycloalkyl groups. Also disclosed is another solid catalyst component. The catalyst component comprises a dialkoxy magnesium carrier, a titanium compound, and a product from an internal electron donor reacting in an inert solvent. In addition to a 2,3-di-non-linear-alkyl-2-cyano succinic acid diester compound as presented in formula I, the internal electron donor compound can also comprise 2-isopropyl-2-(3-methylbutyl)-1,3-dimethoxy propane and/or a carboxylic ester compound. Also disclosed is a catalyst containing the solid catalyst component. The catalyst is used for olefin polymerization, particularly propylene polymerization, and is relatively active during polymerization. The obtained polymer has the advantages of wide molecular weight distribution, high molecular bulk density, good hydrogen regulation sensitivity, good stereospecificity, good particle shape, and small fine powder content.
摘要:
A catalyst component (A) for olefin polymerization is prepared by contacting a solid component (a) containing magnesium, titanium, halogen and an internal electron donor compound with an organosilicon compound (b), wherein the organosilicon compound (b) is one or more selected from a Si—H functional group containing chainlike polysiloxane (b1) represented by formula (Ix), a cyclic polysiloxane (b2) represented by formula (Iy) and a Si—H functional group containing organosilicon compound (b3) represented by formula (Iz). In addition, a process for preparing the catalyst component and the corresponding catalyst is described. The catalyst component and its catalyst have high catalytic activity, good hydrogen response, and good stereospecificity, the catalyst can release its activity more evenly, and the obtained polymer has significantly increased bulk density. The definitions of R1 to R10, n and z in the formulae (Ix), (ly) and (Iz) are as described in the specification.
摘要:
A catalyst component (A) for olefin polymerization is prepared by contacting a solid component (a) containing magnesium, titanium, halogen and an internal electron donor compound with an organosilicon compound (b), wherein the organosilicon compound (b) is one or more selected from a Si—H functional group containing chainlike polysiloxane (b1) represented by formula (Ix), a cyclic polysiloxane (b2) represented by formula (Iy) and a Si—H functional group containing organosilicon compound (b3) represented by formula (Iz). In addition, a process for preparing the catalyst component and the corresponding catalyst is described. The catalyst component and its catalyst have high catalytic activity, good hydrogen response, and good stereospecificity, the catalyst can release its activity more evenly, and the obtained polymer has significantly increased bulk density. The definitions of R1 to R10, n and z in the formulae (Ix), (ly) and (Iz) are as described in the specification.
摘要:
A process for preparing a solid particle-type catalyst component used for olefin polymerization which contains magnesium, titanium, a halogen and an electron donor as essential ingredients, a catalyst component obtained by said process, and a catalyst containing the catalyst component are disclosed.
摘要:
An uplink synchronization processing method, a User Equipment (UE), and a base station are provided. The method includes: receiving a component carrier (CC) uplink synchronization indication message sent by a base station, where the uplink synchronization indication message carries identification information of one or multiple newly configured CCs; sending synchronization signaling to the base station when knowing that the uplink synchronization needs to be executed on all or a part of the one or multiple newly configured CCs corresponding to the identification information; and receiving a time advanced (TA) adjusting message that is sent by the base station according to the synchronization signaling, and applying a TA value carried in the TA adjusting message to the CC on which the uplink synchronization needs to be executed.
摘要:
Embodiments of the present invention disclose a handover method, User Equipment (UE), and a network side device, which can shorten a handover delay of a control plane and an interrupt delay of user plane data. A handover method includes: obtaining, by a UE, a Time Advance (TA) of a target cell before a handover; and obtaining an Uplink Grant (UL Grant) sent by the target cell; and then sending a Handover Complete message to the target cell with the TA on a resource that is corresponding to the UL Grant.
摘要:
A method, a system, and equipment for information processing are provided. The method includes receiving information sent by a source eNodeB of UE, where the information includes processing status information and data information which are obtained after the source eNodeB processes data transmitted by the UE, or data information in at least two user plane protocol stacks of the source eNodeB, or data information in user plane protocol stacks except PDCP in the source eNodeB; and correspondingly, transmitting data with the UE according to the processing status information and data information, or the data information in the at least two user plane protocol stacks, or the data information in user plane protocol stacks except PDCP.
摘要:
A method, device and system for sending and acquiring information is provided, which relates to the field of communication, for solving the problem that user equipment (UE) cannot judge whether information transmitted in a time-frequency resource block is pilot measurement information or not that result in inaccurate detection on signal quality of a neighboring cell by the UE. A technical solution according to the present invention includes: acquiring antenna configuration information of the neighboring cell; and sending a message carrying the antenna configuration information of the neighboring cell to the UE. The embodiments of the present invention can be applied in a wireless communication network.