99results about How to "High insertion rate" patented technology

The invention discloses a domino catalyzing system of a primary metallocene catalyst, which takes ethane as a sole monomer to prepare branched polyethylene, and the application thereof, which relates to vinyl copolymer. the catalyzing system is a compound catalyzing system consisting of the single primary metallocene catalyst and two different catalyst promoters, wherein, the primary catalyst is a metallocene catalyst with a structural formula of Cp<1>MR<1>R<2>R<3>, Cp<1>Cp<2>MR<1>R<2> or Cp<1>-D-Cp<2>MR<1>R<2>; alkyl aluminium acts as an oligomerization catalyst promoter; methylaluminoxane or triisobutyl aluminium or triethyl aluminum that is not used together with the oligomerization catalyst promoter acts as a copolymerization catalyst promoter; the mole ratio between the oligomerization catalyst promoter and the primary catalyst is 10-1000 to 1, and the mole ratio between the copolymerization catalyst promoter and the primary catalyst is 20-1000 to 1. The catalytic activity of the metallocene domino catalyzing system for preparing the branched polyethylene is 5 multiplied by 10<5> to 5 multiplied by 10<7>gPE / (molM per hour), the degree of branching is 10-200 / 1000C, the molecular weight of the branched polyethylene prepared under the effect of the catalyzing system ranges from 1 multiplied by 10<5> to 4 multiplied by 10<5> and the melting point is below 120 DEG C or even no melting point exists.

The invention provides a bi-metal semi-metallocene catalyst for olefin polymerization, and a preparation method and an application thereof. The bi-metal semi-metallocene catalyst has the structure of the general formula (1) shown in the specification. The invention further provides a catalyst for olefin polymerization. The catalyst contains the bi-metal semi-metallocene catalyst. The bi-metal semi-metallocene catalyst has low cost and high activity at the temperature of 30-200 degrees centigrade; co-monomer insertion amount is high, and polyolefin has low density and excellent performance.

The invention discloses a non-metallocene tridentate binuclear titanium complex, a preparation method and purpose thereof in catalysis of ethylene homopolymerization and catalysis of copolymerization of ethylene and alpha-olefin and cycloolefin or dialkene. The non-metallocene tridentate binuclear titanium complex prepared by the method of the invention has the advantages of novel design, simple preparation method, mild reaction conditions, low cost of catalyst and high ethylene polymerization activity, and the activity for catalysis of ethylene polymerization is higher than 106g PE / molTi.h; and compared with a corresponding mononuclear catalyst, the complex has the advantages of good stability, long service life, less cocatalyst amount, and wide molecular weight distribution width of the obtained polymer.

The invention relates to a cyclic olefin copolymer with polar group and a preparation method thereof. The cyclic olefin copolymer comprises the components by molar percent: 20-79.5% of cyclic olefin monomer with general formula I and / or general formula II, 20-79.5% of non-cyclic-olefin monomer with general formula III, and 0.5-20% of polar non-cyclic-olefin monomer with general formula IV. The preparation method of the cyclic olefin copolymer adopts a solution polymerization method; the cyclic olefin monomer, the non-cyclic-olefin monomer and the polar non-cyclic-olefin monomer protected by triisobutyl aluminium are added into a reaction kettle under the condition that metallocene main catalyst and alkyl aluminium catalyst accelerator exist, and then are stirred for polymerization reaction at the temperature of 30-100 DEG C under the atmospheric pressure of 1-100. The prepared cyclic olefin copolymer which has high content of cyclic olefin and the polar group has high heat resistance and cohesive property as well as good compatibility of organic matters.

The invention relates to an olefinic polymerization non-metallocene metal catalyst system and preparation and application thereof. A main catalyst is shown as a structural formula (1), wherein M represents Ti, Zr, Hf, Sc, Y, La, Nd or Sm; methylaluminoxane or modified methylaluminoxane is taken as a cocatalyst; and the molar ratio of the main catalyst to the cocatalyst is 1:100-5,000. The catalyst has high activity and high polymer molecular weight; when the catalyst is applied to copolymerization of ethylene and alpha-olefin or a polar alkene monomer, the insertion rate of the alpha-olefin or the polar alkene monomer is high; and the main catalyst has high stability and small monoamine oxidase (MAO) using amount.

A display device includes a display that includes display elements arranged in lines of a matrix. Each display element is configured to emit light based on a video signal that is received by the display. A proportion determiner is configured to determine, for each line, a proportion of a single frame period during which each display element of a corresponding line is not to emit the light. A signal converter is configured to convert an amplitude of the video signal for each line according to the proportion determined for each line. A signal output is configured to output the video signal converted by the signal converter to the display as a converted video signal. A scanner is configured to output a scanning signal to the display for each line for inputting the converted video signal to the display elements of each line based on the proportion determined for each line.

The invention is a distribution method integrating the integrated circuit distribution plan and the buffer plan, the invention belongs to computer aided design for integrated circuit field. The character lies in: it introduces the feasible area calculation when the buffer is inserted in, and simplifies the complexity of the buffer distribution through distribution of the blank area in the plan result, the design is carried on pointing to the solution procedure to the simulated quenching by the buffer distribution, the distribution of the buffer is integrated in the solution of the distribution plan. The buffer distribution is leaded in the optimization process of the wiring plan, realizes the optimization to the delay performance.

Embodiments include a carton feeding system for feeding a plurality of cartons to a conveyor track, comprising a plurality of feeding devices, where each feeding device comprises a pick-up head with a plurality of vacuum cups, and an erecting finger pivotally suspended at the pick-up head, where the pick-up head has a pick-up position (P1) in which the holding plane of the pick-up head is positioned parallel to the folded carton blank that is to be picked up, and an insertion position (P2) in which the erecting finger is pivoted with respect to the holding plane of the pick-up head in such a way that the carton is opened, and where at least two cartons are inserted simultaneously into the conveyor track.

The present invention provides a catalyst containing mono schiff base and monocyclopentadiene gliand. The said catalyst is used in polymerization of olefine and can be used to obtain polymer with high molecular weight and high copolymerized monomer inserting rate.

The present invention relates to a vanadium-based catalyst system for olefin polymerization, wherein the vanadium-based catalyst system comprises a vanadium compound main catalyst, an organoaluminum compound auxiliary catalyst and a compound regulator containing a carbon-halogen chemical bond. According to the present invention, the vanadium-based catalyst system for olefin homopolymerization and copolymerization of ethylene with other olefins or diolefins has high catalytic activity so as to reduce the catalyst consumption; and the random sequence distribution content in the prepared copolymer is increased, and the comonomer insertion rate is significantly improved.

The invention relates to a copolymerization method of ethane / alpha-alkene, which is characterized in that: a mixture of constrained geometry carbon-bridged single metallocene is used as catalyst to catalyze ethane / alpha-alkene copolymerization; constrained geometry carbon-bridged single metallocene catalyst comprises a constrained geometry carbon-bridged single metallocene compound which is represented by the following structural general formula (I): R represents H or tertiary butyl or allyl containing 1-10 carbon atoms; R1, R2 respectively represents H or alkyl or aromatic base containing 1-10 carbon atoms; M represents Ti or Zr; Cp represents cyclopentadienyl, substituted cyclopentadienyl, indenyl or substituted indenyl; the molo ratio of the constrained geometry carbon-bridged single metallocene compound to the other compounds is 5-7:1; fulvene and amido are subject to a lithium reaction and then followed by a complexation with metal, thereby that the mixture of constrained geometry carbon-bridged single metallocene containing different substituents is obtained. The method disclosed in the invention can be used in the copolymerization of ethane / 1-hexane, ethane / 1-octene and ethane / 1-decene, and the insertion rate of long-chain alpha-alkene is high.

The invention provides an aniline anthraquinone late transition metal compound and a preparation method and application thereof. The preparation method includes following steps: dissolving chloroanthraquinone and substituted aniline in a solvent, and reacting at certain temperature and under catalytic action to generate aniline anthraquinone ligand; dissolving the aniline anthraquinone ligand in an organic solvent, and adding a hydrogen pulling agent for reaction at proper temperature to pull off amino hydrogen to form a ligand salt compound; adding a metal precursor for reaction to obtain the aniline anthraquinone late transition metal compound. The aniline anthraquinone late transition metal compound can be used for homopolymerization or copolymerization of allyl monomer. A catalytic system is used for allyl polymerization, and both high polymer and low polymer can be obtained by selecting different co-catalysts.

The invention discloses a preparation method of a lithium extraction adsorbent. The preparation method comprises the following steps: preparing a mixed salt solution containing 1-2mol / L of aluminum salt, 2-4mol / L of lithium salt and 0-2mol / L of third salt MX; preparing an aqueous solution containing 1-3 mol / L of alkali; adding the alkali-containing aqueous solution into the mixed salt solution ina stirring state, carrying out stirring, and carrying out solid-liquid separation on the reaction mixture to obtain a reaction mother solution and an active body; drying the active body and crushing the active body into powder; uniformly kneading the powder with a polymer and a solvent, and then carrying out extrusion molding; and carrying out drying, crushing, and screening particles with the particle size of 0.6-2.0 mm to obtain an adsorbent finished product. According to the method, the aluminum-based lithium extraction adsorbent with excellent performance can be prepared on the premise ofcontrollable cost.

The invention relates to an electron donor catalyst and preparation and application thereof. A main catalyst consists of carrier, transition metal halide, organic alcohol compound, organic siloxane and organic silicon amine in a molar ratio of 1: (0.01-20): (0.1-6): (0.01-5): (0.01-5); a co-catalyst is an organic aluminum compound; and the molar ratio of the transition metal halide in the main catalyst to the co-catalyst is 1: (30-500). The catalyst has the advantages of high catalytic activity, high polymer molecular weight, wide polymer molecular weight distribution, good copolymerization property of copolymerization monomers, suitability for a slurry packing method, a gas-phase polymerization process or a combined polymerization process, simple preparation method, low equipment requirement and low environmental pollution.

The invention discloses a non-metallocene bidentate double-vanadium complex as well as a preparation method thereof and an application of the non-metallocene bidentate double-vanadium complex in catalyzing homopolymerization of ethylene and catalyzing copolymerization of ethylene and alpha-olefin, cycloolefin, acyclic diene or a polar monomer. The non-metallocene bidentate double-vanadium complexprovided by the invention has novel design, a simple synthetic method, mild reaction conditions and lower catalyst costs; double metal vanadium has a synergistic effect, the complex has extremely highactivity when being used for catalyzing polymerization of the ethylene, wherein the highest activity is higher than 107g / molV*h, and the catalyst has good stability and can maintain higher activity in a wider temperature range for a longer time; and the complex has extremely high activity when being used for catalyzing copolymerization of the ethylene and other olefins, especially the polar monomer, the insertion rate of a comonomer is high and can be regulated and controlled, and therefore the performance of a polymer can be effectively regulated and controlled.

The invention relates to a large-steric-hindrance neutral nickel catalyst, a preparation method and an application in preparation of an ethylene / polar monomer copolymer. A phenol-phosphorous mono-anionic ligand with different substituents of R1, R2 and R3 is dissolved in a good solvent and added to a good solvent of a metal nickel source for a reaction, and the catalyst is obtained, and X-ray single crystal diffraction indicates that an obtained complex adopts a plane quadrangle structure. The synthesized catalyst single component is used for triggering ethylene polymerization. An obtained polymer is a high-molecular-weight linear polymer with the molecular weight up to 770 kg / mol. Copolymerization of polar monomers such as ethylene, methyl acrylate and the like is realized, the copolymer with different polar monomer insertion rates is obtained, and the polar monomer insertion rate is up to 8mol%. Experimental results indicate that the polar monomers are inserted in polymer chain tails and molecular chains, which is the major breakthrough of the neutral nickel catalyst in the olefin polymerization history.

The invention provides a constrained-configuration dinuclear metallocene, and a preparation method and application thereof. The metallocene has a two-center CGC (Critical Grid Current), so that not only is the activity of a single-site catalyst realized, but also electronic environments and space environments of the two metal centers are conveniently controlled through adjusting the length of a carbon bridge, the molecular weight distribution of a polymer is further regulated and controlled, and wide-distribution polyolefin is produced. The technical scheme provided by the invention has the advantages of short synthetic route, simple synthetic process and low industrial cost.

The invention discloses a biobased micro-porous polyurethane material and a preparation method thereof. The method comprises a component A preparation process, a component B preparation process and a component A and component B mixing process, wherein the component A preparation process comprises the following steps: stirring 20 to 41 parts by weight of polyether polyol, 3 to 11 parts by weight of chain extender, 0.01 to 0.52 part by weight of water, 0.15 to 0.59 part by weight of silicone oil, and 0.12 to 0.33 part by weight of catalyst for not less than 5 minutes; and degassing under a negative pressure condition until the degree of vacuum does not change any more, and sealing for storage. Compared with the prior art, according to the invention, a pre-polymer method is adopted, MDI (diphenylmethane diisocyanate) with low price, good prepolymer stability and short production period and biobased polyether polyol with environmental friendliness and regenerability are preferably used for preparing a micro-porous elastic body, thus environmental friendliness and use performance are taken into consideration, and the market developing space is great.

The invention relates to a heterogeneous polymerization reaction catalyst and application of the heterogeneous polymerization reaction catalyst to preparing a homopolymer and a copolymer. The heterogeneous polymerization reaction catalyst mainly comprises a supported catalyst promoter A and a catalyst B, the structure of the catalyst B is shown in the formula (I) or the formula (II), R1-R5 are respectively independently chosen from hydrogen, alkyl group, substituendum of the alkyl group, alkoxy group, alkyl sulphanyl, halogen, nitryl, aryl group or substituendum of the aryl group in the formula, the adjacent groups in the R1-R5 form a ring and the number of the formed ring structures is less than 4, R6 is the alkyl group or the aryl group, and L is alkyl group substituted phosphine or allyl. The heterogeneous polymerization reaction catalyst can be used to prepare the homopolymer and the copolymer, the activity is relatively high, the tolerance of the polar functional group is relatively good, the molecular weight of the prepared polymer is relatively large, the distribution of the molecular weight is relatively narrow, the morphology is controllable, no subsequent processing is needed, and the phenomenon of adhesion on a kettle is effectively improved.

The invention relates to a bridge non-metallocene and preparation and application thereof. The structure of the bridge non-metallocene is shown in a general formula (1), wherein in the general formula (1), M is Ti, Zr, Ni, Nd, Y, Rh, Hf, Sc, La or Sm; X is Cl or Br; R is H, C1-C10 aliphatic groups, and C6-C20 arene groups; and R'1, R'2, R'3, R'4, R1, R2, R3 and R4 are H or C1-C10 aliphatic groups, wherein any two substituents can be the same or different. The bridge non-metallocene is used for catalyzing non-polar olefin polymerization or copolymerization, or non-polar olefin and polar olefin copolymerization; and the bridge non-metallocene is high in catalytic activity, good in stability and less in application amount of a catalyst promoter, the molecular weight of an obtained copolymer is high, and an insertion rate of monomers is high.

The invention relates to a keto-imidazoline-2-imine [N,O] bidentate nickel and palladium complex as well as a preparation method and application thereof. The preparation method comprises the followingsteps: reacting a keto-imidazoline-2-imine ligand with a hydrogen withdrawing reagent and a metal precursor in sequence to prepare a keto-imidazoline-2-imine [N,O] bidentate nickel and palladium complex; and the structural formula of the prepared complex is one of formulas shown in the specification. The complex and a cocatalyst form a catalyst composition, the complex or the catalyst compositionis used for catalyzing homopolymerization or copolymerization of olefin monomers, and the specific process is as follows: under the protection of nitrogen, firstly dissolving the complex or the catalyst composition in a solvent, then adding an olefin monomer, and conducting reacting for a period of time at a certain temperature and under a certain pressure to prepare the olefin polymer. The complex and the catalyst composition provided by the invention have relatively high catalytic activity, high tolerance to polar monomers and relatively low application cost.

The invention provides an asymmetric constrained-geometry dinuclear metallocene compound, a preparation method of the asymmetric constrained-geometry dinuclear metallocene compound and application of the asymmetric constrained-geometry dinuclear metallocene compound. The dinuclear metallocene compound has an asymmetric double-site CGC (constrained geometry complex), which has the advantages that not only is the activity of a single-site catalyst obtained, but also the electronic environment and spatial environment of two metal centers are controlled conveniently through the modification of a substituent group on a bridge base C and the adjustment of the length of a carbon bridge, therefore the molecular weight distribution of a polymer is regulated, and widely-distributed polyolefin is produced. The technical scheme provided by the invention has the advantages of short synthetic route, simple synthesis technology and low industrial cost.

The invention relates to an ethylene polymerization catalyst, preparation and application thereof. The catalyst consists of a carrier, transition metal halides, organic alcohol compounds, organic silicone compounds and an organic thiols in a molar ratio of 1:(0.01-20):(0.1-6):(0.01-5):(0.001-5). The organic thiols is one or a mixture of two or more of the compounds with a general formula of HS-R1, wherein the R1 is an alkyl group of which the carbon atom number is 1 to 20, a cycloalkyl group of which the carbon atom number is 3 to 20, an aryl group of which the carbon atom number is 6 to 30, an organic silyl group of which the carbon atom number is 1 to 30, an organic cycloalkyl group of which the carbon atom number is 3 to 30, an organic aryl group of which the carbon atom number is 6 to40 or an organic siloxy group of which the carbon atom number is 1 to 30. The catalyst has high activity; a polymer has high molecular weight and wide molecular weight distribution; and the preparation method has the characteristics of simple method, low requirement on equipment and low pollution to environment.

The invention relates to an olefin polymerization catalyst and a preparation method thereof. A main catalyst consists of a carrier, a transition metal halide, an organic alcohol compound, an organo-siloxane compound and organic silanol according to a molar ratio of 1:(0.01-20):(0.1-6):(0.01-5):(0.01-5). The molar ratio of the transition metal halide in the main catalyst to a cocatalyst is 1:(30-500); the organic silanol is one or a mixture of two or more of compounds with a general formula of HO-SiR1R2R3; and the carrier is an inorganic oxide carrier, a halide carrier or a polymer carrier. The catalyst has the advantages of good spherical grain shape, high activity, high polymer molecular weight, wide distribution of polymer molecular weight, and suitability for a slurry process, gas-phase polymerization technology or combined polymerization technology; and the preparation method has the advantages of simpleness, low equipment requirement and small environmental pollution.

The invention relates to a naphthol skeleton phenol-phosphine neutral nickel catalyst preparation method and application in preparing an ethylene / vinyl polar monomer co-polymer. Naphthol-phosphine ligands containing different R and Ar substituent groups and a metal nickle source are subjected to coordination reaction to obtain a series of phenol-phosphine complexes with the different substituent groups. The phenol-phosphine complexes can be used as a high-activity neutral catalyst single component for triggering vinyl polymerization, wherein vinyl homopolymerization activity is up to 2.9*107 g / (molNi.h). By means of the type of catalysts, efficient copolymerization of ethylene and vinyl polar monomer is achieved, the copolymerization activity can reach 1.4*105 g / (molNi.h). Through nuclearmagnetic spectroscopy calculation, the methyl acrylate insertion rate can be up to 6.5 mol%; the methyl methacrylate insertion rate can be up to 4.4 mol%.

A control rod is used to control the reaction of a nuclear reactor. The control rod comprises one or more internal rodlet(s) and a hafnium skin that serves as the outermost layer, rather than a stainless steel cladding. Several variations on rodlets are contemplated. The rodlets are made of hafnium or Ag—In—Cd. The resulting control rod, due to the lack of a stainless steel cladding, has a greater rod reactivity worth, increased weight, and high flexibility.

The invention relates to a palladium-containing catalyst and a preparation method thereof, a composition prepared from the palladium-containing catalyst, and application of the composition. The structural formula of the palladium-containing catalyst is described in the description. The preparation method of the palladium-containing catalyst comprises the following steps: firstly, dissolving 2-hydroxy-1,4-naphthoquinone and substituted aniline into an organic solvent for carrying out a reaction so as to obtain an aniline naphthoquinone ligand; dissolving the aniline naphthoquinone ligand into an organic solvent, and adding a hydrogen extraction reagent for carrying out a reaction so as to obtain a ligand salt compound; adding a palladium precursor into the ligand salt compound for carryingout a reaction so as to obtain an intermediate metal complex; finally, adding a pyridine reagent into the intermediate metal complex for carrying out a reaction to obtain the catalyst. The compositioncan be prepared from the palladium-containing catalyst and a catalyst promoter. The palladium-containing catalyst uses palladium as a metal center, is higher in activity of catalyzing homopolymerization of ethylene and copolymerization of olefin and a polar monomer, also can reach a certain activity without needing a catalyst promoter, and is good in economical efficiency and high in polarity / functional monomer insertion rate. The composition prepared from the palladium-containing catalyst has higher catalytic activity when a very small amount of the catalyst promoter is used.

The present invention discloses a catalyst system used for the preparation of a cycloolefin copolymer. The catalyst system comprises a main catalyst and an auxiliary catalyst, the main catalyst is a metallocene compound which has a structural formula of (I), and the auxiliary catalyst is an aluminum alkyl compound which has a structure of (II) or a structure of (III). A cycloolefin monomer of the cycloolefin copolymer which is prepared by the catalyst system for the preparation of cycloolefin copolymer has high insertion rate, the mole fraction can achieve 90 percent, and the heat-resistance of the cycloolefin copolymer is improved.

The invention discloses a limited geometric configuration metallocene catalyst as well as a preparation method and application thereof. The preparation method comprises the steps of taking 2-pyrrole formaldehyde or a complex derivative thereof as a raw material, synthesizing fulvene with indene, preparing a ligand through lithium aluminum hydride reduction, and then obtaining a high-yield catalysttaking titanium as an active center by using an amine elimination method. The catalyst can catalyze olefin homopolymerization and copolymerization. Pyrrole N heterocycle replaces tert-butylamine to serve as an electron donor, the molecular structure of the catalyst is symmetrical, and the insertion rate of alpha-olefin in the polymer is increased. The catalyst disclosed by the invention is simplein synthetic route, easily available in raw materials and low in cost, the yield of the catalyst is greatly improved, and the catalyst has good olefin polymerization catalytic activity.