402results about How to "Good hydrogen sensitivity" patented technology

This invention relates to a method for preparing catalyst for ethylene homopolymerization or copolymerization with other alpha-olefins. The catalyst comprises at least one Mg composite, at least one Ti compound, at least one organic alcohol compound, and at least one Si compound. The general formula of the Si compound is R1xR2ySi (OR3) z, where R1 and R2 are alkyl or halogen; R3 is alkyl; x is 0-2; y is 0-2; z is 0-4; x + y + z = 4. The catalyst has such advantages as high catalytic activity, high hydrogen sensitivity and narrow particle size distribution of polymer. The catalyst is suitable for slurry polymerization of ethylene, and combined polymerization process where catalyst with high activity is needed.

The invention relates to a catalyst for ethene polymerization, and comprises the following components: A, a titanium containing solid catalyst component, which is prepared by the following steps: magnesium halide, organic epoxy compounds, organic phosphorous compounds, organic alcohol compounds are reacted for forming a uniform solution; and the solution, aromatic ester compounds, halide compounds of transition metallic titanium or derivatives thereof are mixed, and thereby obtaining the solid catalyst component; B. organic aluminium compound, whose general formula is AlRnX3-n, wherein, R is an alkyl which contains 1-20 hydrogen or carbon atoms, X is a halogen atom, and n is an integer which is less or equal to 3 and more than 0. The catalyst has the advantages of high catalytic activity and good hydrogen response, and the polymer has high bulk density, and the catalyst is suitable for homopolymerization of ethylene or copolymerization of ethylene and other alpha-alkenes.

The invention provides a spherical magnesium halide adduct and a preparation method thereof. The method comprises the following steps of: (1) mixing magnesium halide and alcohols except methanol with optional inert liquid media and heating the obtained mixture under stirring until a melt of the magnesium halide adduct is formed; (2) adding the melt of the magnesium halide adduct to cooling media after shearing and dispersing the melt to form spherical solid particles; and (3) carrying out contact reaction on the spherical solid particles and dimethoxy propane in the inert dispersion media. The invention also provides application of the magnesium halide adduct as a catalyst carrier. The magnesium halide adduct has the following beneficial effects: the morphology of particles of the magnesium halide adduct is more regular and is basically spherical; the particle size distribution is more concentrated; basically special-shaped particles do not exist; and the catalyst prepared by adopting the spherical magnesium halide adduct as the catalyst carrier has better hydrogen regulation sensitivity in propylene polymerization reaction.

The invention provides a spherical magnesium halide adduct and a preparation method and application thereof. The method comprises the following steps of: (1) mixing magnesium halide, alcohol except methanol, and an optional inert liquid medium, and heating the obtained mixture with stirring to form a magnesium halide adduct melt; (2) performing shear dispersion on the magnesium halide adduct melt, and adding into a cooling medium to form spherical solid particles; (3) performing contact reaction on the spherical solid particles and dimethoxy propane in an inert dispersion medium; and (4) performing contact reaction on a product obtained in the step (3) and a polyol ester compound in the inert dispersion medium. The magnesium halide adduct has a good particle shape, a smooth surface and high liquidity, and special-shaped particles do not exist; and a catalyst prepared by taking the magnesium halide adduct as a catalyst carrier has high hydrogen regulation sensitivity when used for olefin polymerization.

The invention relates to a catalyst component used for ethylene polymerization reaction and a catalyst thereof. The catalyst component contains magnesium composite, titanium compound, organic alcoholic compound and boron compound. The organic boron compound is selected from at least one of structural formula 1, structural formula 2 and structural formula 3. The catalyst of the invention is quite applicable for a slurry polymerization process of ethylene, and the catalyst has better hydrogen regulation sensitivity and higher catalytic activity.

The invention provides a preparation method of solid catalyst used in olefinic polymerization catalyst, the method synthetizes the solid catalyst of olefinic polymerization continuously by magnesium powder, simplifies the technology of preparing magnesium compounds solid firstly then preparing the solid catalyst of olefinic polymerization, reduces quantity of equipment needed in industrialization, has advantages of simple technics, easy operation, low industrializing installation cost, low production cost, easy controlled product quality. The ball solid catalyst of olefinic polymerization which D(50) is in range of 10-80 mum is produced through the method of the invention, the catalyst has particle sphericity height L/W<1.4 (L expresses the longest axle of the particle, W is the minimum axle of the particle), has advantages of high polymerization activity, hydrogen regulating sensibility, high isotacticity of the polymer, centralized particle-size distribution.

The invention relates to a catalyst component for olefin polymerization, a catalyst and application of the catalyst in olefin homopolymerization and polymerization. By using a composite internal electronic donor compound which contains an alpha-cyanosuccinate compound A and a single-functional group or double-functional group compound B which is selected from ester, ether, ketone and ketal exceptfor the compound A as the catalyst of internal electronic donor synthesis, the catalyst has the characteristics of high catalytic activity, high hydrogen adjusting sensitivity, high isotactic index of polymerized products, wide molecular weight distribution and high weight-average molecular weight when being used for propylene polymerization. The favorable performance of the catalyst is beneficial to the preparation of polypropylene and the brand development of products.

The invention provides a catalyst component for olefin polymerization. The catalyst component is prepared by: dispersing an alcohol adduct melt of magnesium halide in a dispersing agent system of white oil and silicone oil to form an emulsion, discharging the emulsion into a cooling liquid to perform cooling shaping, thus forming a magnesium halide alcohol adduct microsphere, washing and drying the magnesium halide alcohol adduct microsphere to form a spherical carrier; and then treating the spherical carrier through a titanium compound, raising the temperature gradually, adding an internal electron donor during treatment, and after treatment, carrying out washing with an inert solvent, and performing drying, thus obtaining the spherical catalyst component. Specifically, a phosphorus-containing compound is added during the steps, and the phosphorus content in the catalyst component is 0.2-3.0wt%. The internal electron donor compound contains at least one diol ester compound selected from the following general formula (I). When the catalyst is used for olefin polymerization, especially propylene polymerization, a polymer with a high isotactic index and a high melt flow rate can be obtained. Particularly under a high hydrogen concentration, a polymer with a high melt flow rate and a high isotactic index can be obtained.

The invention relates to a preparation method of a catalyst component for ethylene polymerization or copolymerization and a catalyst thereof. The method comprises the following steps: (1) at a temperature of 50-90DEG, dissolving magnesium halide in a solvent system containing an organic epoxy compound and an organic phosphorus compound to form a uniform solution; adding an organic alcohol compound during or after the solution formation and leaving them to react for certain time so as to obtain a reaction solution; (2) in the presence of an organic titanium compound and at a temperature of -30DEG C-0DEG C, subjecting the solution and a titanium compound to a contact reaction, or adding the organic titanium compound after the contact reaction of the solution obtained in step (1) and the titanium compound, and raising the temperature of the mixture slowly to 50-120DEG C, leaving solids to precipitate gradually and form particles, after certain period of reaction, removing the unreacted material and the solvent, and conducting washing with an inert diluent so as to obtain a solid component; and (3) suspending the solid component in certain amount of the inert diluent, performing a contact reaction with an organic aluminium compound under a temperature of 0DEG C-50DEG C, and after certain reaction time, removing the inert diluent, thus obtaining the catalyst component. The catalyst provided in the invention has high catalytic activity and good hydrogen response.

A catalyst for polymerization or copolymerization of ethylene is prepared through dissolving magnesium halide in organic epoxy compound, organic phosphorus compound or inertial diluent, adding alkane educing aid, porous inertial carrier and halide of Ti, and educing. It is possible to add alcohol compound and/or electron donor. Its advantages are high activity and copolymerizing performance, and high sensitivity to hydrogen regulation.

The invention provides components of a catalyst used for CH2=CHR olefin polymerization, wherein R is hydrogen or a C1-C12 alkyl or aryl group. The components of the catalyst include magnesium, titanium, halogen and an electron donor. The electron donor is at least one compound selected from groups represented by a general formula (I); and in the general formula (I), R1 and R2 may be same or different and are respectively selected from the group consisting of a straight-chain or branched-chain C1-C10 alkyl or cycloalkyl group, a C6-C20 aryl or aralkyl group, hydrogen, halogen, an acyl group, an ester group, an amido group and an amino group.

The invention discloses a high isotactic polypropylene alloy material and a preparation method thereof. The material contains 5-98.9 parts by weight of polybutylene, 1-80 parts by weight of polypropylene and 0.1-15 parts by weight of propylene-butene copolymer; the isotacticity of the high isotactic polypropylene is larger than 85%, and the smelting point of the high isotatic polypropylene is 115-129 DEG C; the isotacticity of the high isotactic polypropylene is larger than 85%, and the smelting point of the high isotactic polypropylene is 155-169 DEG C; the propylene-butene copolymer contains a random copolymer and a segmented copolymer of propylene-butene. The preparation method uses a titanium/vanadium supported catalyst and adopts a multistage sequential polymerization manner and specifically comprises the steps of carrying out propylene polymerization or butane-1 polymerization, then initiating butane-1 polymerization or propylene polymerization, and respectively carrying out propylene polymerization or butane-1 polymerization, and so on to synthesize the high isotactic polypropylene alloy material. The material is a powdery or spherical product, and has the advantages of excellent impact resistance, thermal creep resistance and low shrinking percentage of polybutylene, high modulus, high surface hardness and fast setting of polypropylene, and the like.

The invention provides a catalyst component for olefin polymerization and a preparation method and application thereof. The catalyst contains the reaction product of at least one type of organomagnesium compound, at least one type of liquid titaniferous compound, at least one type of hydroxyl compound, at least one type of chloric organophosphorus compound and at least one type of formation-assisting precipitation agent, and the formation-assisting precipitation agent is polystyrene block polybutadiene polymer. The prepared catalyst has good hydrogen-regulating performance and good particle morphology and distribution, which is more favorable for the application of the catalyst in polymerization process apparatuses of gaseous phase, slurry and the like.

The invention provides a catalyst ingredient for olefin polymerization, its preparation method and application. The ingredient comprises at least one organic magnesium compound, at least one liquid titaniferous compound, at least one hydroxyl compound, at least one chlorine-containing organosilicon compound, and at least one reaction product of a forming and precipitating aid, wherein, the forming and precipitating aid is a polystyrene block polybutadiene polymer. The prepared catalyst has good hydrogen regulation performance, good particle shape and distribution, which is advantageous for the use of the catalyst in gas phase, slurry and other polymerization devices.

The invention provides a catalyst component for olefin polymerization. The catalyst component is prepared by: mixing a magnesium compound, an organic alcohol compound and an inert solvent, and adding an assistant precipitation agent to obtain an alcohol adduct; contacting the alcohol adduct with a titanium compound solution, then adding an internal electron donor compound and leaving them to react, conducting filtration to separate solid particles; adding the solid particles into the titanium compound solution, carrying out stirring and leaving them to react, and conducting filtration to separate solid particles; washing the solid particles by the inert solvent, and performing drying. Specifically, a phosphorus-containing compound is added during the steps. And the phosphorus content of the catalyst component is 0.2-3.0wt%. The internal electron donor compound contains at least one diol ester compound selected from the following general formula (I). When the catalyst is used for olefin polymerization, especially propylene polymerization, a polymer with a high isotactic index and a high melt flow rate can be obtained. Particularly under a high hydrogen concentration, a polymer with a high melt flow rate and a high isotactic index can be obtained.

The invention provides a catalyst component for olefin polymerization. The catalyst component contains the reaction product of a magnesium compound, a titanium compound, a phosphorus-containing compound and a phosphorus-free internal electron donor compound. The phosphorus-containing compound is added in a step except the step of magnesium compound dissolution, and the catalyst component has a phosphorus content of 0.4-3.0wt%. The involved catalyst has strong stereospecificity and good hydrogen regulation sensitivity. When the catalyst is used for olefin polymerization, especially propylene polymerization, a product with a high isotactic index, a high melt flow rate and a low dimethylbenzene soluble substance content can be obtained simultaneously. Especially when the catalyst is used for propylene polymerization under a high hydrogen concentration condition, the obtained polymer can have a high melt flow rate, a high isotactic index and a low dimethylbenzene soluble substance content, and at the same time, the polymer has a relatively narrow molecular weight distribution.

The invention provides a catalyst component for olefin polymerization and application of the catalyst component. The catalyst component contains a product obtained by reacting a magnesium halide adduct, a titanium compound and at least one optional internal electron donor compound, wherein the magnesium halide adduct is shown as MgX<1>Y-mEtOH-n(LB1)-k(LB2)-p(LB3). The invention also provides a catalyst system for olefin polymerization and application of the catalyst system. The catalyst system contains the catalyst component and one or more organic aluminum compounds. The invention also provides an olefin polymerization method. The method comprises the following step of: contacting one or more olefins and the catalyst system under the condition of olefin polymerization. The catalyst system has high hydrogen regulation sensitivity and stereospecificity in olefin polymerization, and good balance between the hydrogen regulation sensitivity and the stereospecificity of the catalyst system is achieved.

The invention provides a titanium-containing solid catalyst component for ethylene polymerization in a slurry process. The solid catalyst component is prepared by dissolving magnesium halide in an organic epoxy compound and an organic phosphorous compound, adding electrons to form uniform solution, reacting the solution and halide of transition metal titanium or derivative solution of the halide, and after the catalyst solid is separated out, adding a halogenated alcohol compound for modification and thus obtaining the solid catalyst component. The catalyst system consisting of the titanium-containing solid catalyst component is applied to the ethylene polymerization and has high activity and high bulk density. At the same time, the obtained polymer has a relatively good particle form.

The present invention provides a catalyst component for olefin polymerization, a preparation method and an application thereof. The catalyst component is a reaction product, which contains at least an organic magnesium compound, at least a liquid titanium-containing compound, at least a hydroxyl-containing compound, at least a chlorine-containing silicone compound, and at least a modified additive, wherein the modified additive is a polybutadiene-polyethylene oxide block copolymer. The prepared catalyst has good hydrogen regulation performance, and good particle morphology and distribution, such that the catalyst is easily used on the gas phase, the slurry, and other polymerization process devices.

The present invention relates to the field of olefin polymerization, and discloses a catalyst system, which comprises a titanium-containing solid catalyst component, an alkyl aluminum compound and an external electron donor compound, wherein the titanium-containing solid catalyst component comprises at least two internal electron donor compounds such as a diol ester compound and a carboxylic acid ester, and the external electron donor compound is the combination of an ether ester compound and alkyl dialkoxysilane. The present invention further provides applications of the catalyst in olefin polymerization reactions. According to the present invention, when the solid catalyst component using the diol ester compound and the carboxylic acid ester as the internal electron donors is subjected to the olefin polymerization reaction, the compounding of the ether ester compound and the alkyl dialkoxysilane is added and used as the external electron donor used in the olefin polymerization reaction, such that the catalyst can maintain the high activity, and the melt index of the obtained polymer can be improved.

The invention relates to the field of olefin polymerization and discloses application of an external electron donor containing an ether ester compound as shown in a formula (I), i.e., R<5>-O-R<4>(R<3>(COOR<1>)COOR<2>), to an olefin polymerization reaction. Moreover, the invention also discloses a catalyst containing the ether ester compound as shown in the formula (I) and application of the same to the olefin polymerization reaction. According to the invention, the ether ester compound is applied as the external electron donor to the olefin polymerization reaction, and in particular, a composition of the ether ester compound and a dialkoxysilane compound is applied to the olefin polymerization reaction; so the catalyst can maintain high activity and has improved hydrogen response, a finally prepared polymer has high activity and isotacticity, and a polymerization method is simple.