64results about How to "Good hydrogen adjustment performance" patented technology

This invention relates to a catalyst system which is used for alkenes polymerizing or copolymerization, it includes solid catalyst composition A that contains titanium and organic Aluminum compound B, silicoorganic compound C, in the composing process of catalyst composition A, use aldyl ester of aryl group mon-carboxylic acid and aldyl ester of fatty series or multielement carboxylic acid of aryl group for reasonable combination, among them aldyl ester of aryl group mon-carboxylic can play a role of assisting separating agent, it is useful to separate catalyst particle; Meanwhile it is used as electron donor, it also can load on the surface of catalytic agent together with compound of multielement carboxylic esters, improve the surface structure of catalytic agent, thus improve the catalyzing function of catalytic agent. This catalytic agent that is used for propylene polymerizing has high catalytic activity and anti- impurity function, particle appearance of catalytic agent is good, particles distribute narrowly, hydro-adjusting function of catalytic agent is good, it is useful for many polymerizing technology such as seriflux method, noumenon method and gas method, molecular weight distribution of polymer is narrow, particle appearance of polymer is good, fine grits is little; Its fine anti-impurity function can effectively reduce production cost.

The invention relates to a preparation method and applications of an alkoxyl magnesium carrier. The preparation method is used for preparing an olefin polymerization catalyst alkoxyl magnesium carrier. The alkoxyl magnesium carrier comprises the following components: magnesium powder, an initiator, a cross-linking agent, a unitary organic alcohol, a dispersing agent and a dispersing medium according to mole ratio of 1 to (0.00001-0.1) to (0.0001-0.5) to (2-100) to (0.05-50) to (1-100). The involved alkoxyl magnesium carrier is good in particle morphology, high in bulk density, and high in mechanical strength. A catalyst prepared by the carrier is used for preparing an olefin polymerization catalyst, the catalyst is high in activity, good in hydrogen regulation performance and good in copolymerization performance, and the polymer is low in the powder content, low in wax content, and good in particle morphology; the involved catalyst is used for ethylene homopolymerization, copolymerization of ethylene and alpha-olefin, or ethylene and polar alkene monomer, propylene homopolymerization, propylene and alpha-olefin copolymerization or propylene and polar alkene monomer copolymerization.

A main catalyst of an olefin polymerization catalyst comprises the following components: a magnesium compound carrier, transition metal halides, C2-C15 alcohols, and asteroid organic aza-ether compounds. The preparation method of the main catalyst comprises the following steps: (1) dispersing a magnesium compound carrier into an inert organic solvent, adding C2-C15 alcohols into the solvent, and stirring to dissolve the alcohols; (2) cooling the solution obtained in the step (1), and adding asteroid organic aza-ether compounds to carry out reactions; and (3) contacting the system obtained in the step (2) with transition metal halides at a temperature of -25 to 30 DEG C, after reactions, washing the reaction products by toluene or n-hexane, filtering to remove unreacted substances, and carrying out vacuum drying to obtain the main catalyst. An olefin polymerization catalyst comprises the abovementioned main catalyst and an auxiliary catalyst, which is one of trimethyl aluminum, triisobutyl aluminum, tri-n-hexyl aluminum, aluminum diethyl mono-chloride, and methyl aluminoxane (MAO).

The invention provides a preparation method and application of a polyolefin-coated Ziegler-Natta, and belongs to the field of olefin coordination polymerization catalysts and olefin coordination polymerization. The method comprises the steps that a carrier is dispersed in inert organic solvent and makes contact with organic alcohol and a third component to form a mixture, and then the mixture makes contact with TiCl4; olefin monomers are activated by an activating agent for polymerization, and a polyolefin-coated Ziegler-Natta main catalyst is obtained. The stacking density of polyolefin can be obviously increased, static electricity of solid main catalyst particles can be eliminated, and the main catalyst particles and polyolefin particles do not stick to the container wall. The Ziegler-Natta catalyst is good in particle morphology and uniform in particle size distribution; the catalyst is excellent in hydrogen regulation performances, the melt flow rate (MFR) of polyethylene can be adjusted between 0.01 g / 10 min and 600 g / 10 min, and the stacking density of polyolefin ranges from 0.3 to 0.4; the catalyst is high in loading capacity and high in activity, the main catalyst particles and the polyolefin particles do not stick to the container wall, and the polymer is good in particle morphology, high in stacking density and less in fine powder; the preparation technology is simple, low in cost and less in environmental pollution.

The invention relates to the field of olefin polymerization catalysts, and discloses a catalyst for olefin polymerization, wherein the catalyst comprises a catalyst precursor and a polymer with a structural unit represented by a formula (IV), the catalyst precursor contains an alkoxy magnesium carrier represented by a formula (I), an electron donor compound represented by a formula (II), a titanium compound represented by a formula (III) and an organic aluminum compound represented by a formula (V), and the catalyst precursor is coated with the polymer with the structural unit represented by the formula (IV). According to the invention, the catalyst is uniform in particle size distribution; the catalyst component containing the catalyst has the characteristics of high activity and low finepowder content when applied to olefin polymerization, and further has characteristics of less activity attenuation under a normal-temperature storage condition, high isotacticity of a polymer, reduced fine powder content in polymer powder and high stacking density; and the formula (1) is Mg(OEt)2-m(OEHA)m, the formula (II) is defined in the specification, the formula (III) is TiXn(OR<7>)4-n, theformula (IV) is -CH2CHR<8>-, and the formula (V) is AlR<9>nY3-n.

The invention provides an alkene coordination polymerization catalyst as well as a preparation method and an application thereof. The alkene coordination polymerization catalyst consists of a primary catalyst and an auxiliary catalyst, and is characterized in that the primary catalyst consists of a magnesium halide carrier, a transition metal halide, an ethanol with the carbon number of less than 5, an ethanol with the carbon number of greater than 5, an organosilicon compound and a polyhydroxy solid, wherein the mass ratio of the polyhydroxy solid to the magnesium halide carrier is (0.05-20):100. The catalyst solid particle is in a good shape of sphere, the catalyst is high in activity, the hydrogen regulation performance is favorable, and the melt index MFR of polyethylene can be regulated within 0.1g / 10min-600g / 10min. The alkene coordination polymerization catalyst is suitable for slurry-method polymerization process, gas-phase-method polymerization process or combination polymerization process.

The invention provides an olefin efficient polymerization catalyst. The catalyst is composed of a main catalyst and a cocatalyst, the main catalyst is composed of an alkyloxy magnesium carrier, transition metal halide and an alkyloxy organic phosphoric acid ether compound according to a molar ratio of 1:(1-40):(0.01-10); and the cocatalyst is an organic aluminum compound. The catalyst has the advantages of good particle form, high catalysis activity and good hydrogen regulation performance. The invention also provides a preparation method and an application of the olefin efficient polymerization catalyst.

The invention provides a load type Ziegler-Natta catalyst and a preparation method. The main catalyst load type Ziegler-Natta catalyst is prepared from a carrier, transition metallic halide, C2-20 alcohol, organic acid and an ionic compound with the molar ratio of 1:(3-50):(0.01-20):(0.01-20):(0.01-20). The catalyst is excellent in hydrogen regulation performance, high in load amount and high in activity, and main catalyst particles and polyolefin particles are not attached to a container wall. The polymer is good in particle morphology, high in stacking density and small in fine powder amount. The catalyst is applicable to slurry polymerization technology, ring pipe polymerization technology, gas phase polymerization technology or combination polymerization process. The preparation process of the main catalyst is simple, low in cost, low in equipment requirement, small in energy consumption and small in environmental pollution.

The invention relates to the field of olefin polymerization and discloses a catalyst component for olefin polymerization, a preparation method of the catalyst component, a catalyst for olefin polymerization and an olefin polymerization method. The method comprises the following steps: (1) magnesium halide with the general formula of MgXY and an alcohol compound with the general formula of R1OH aremixed and emulsified, obtained emulsion is subjected to a contact reaction with an ethylene oxide compound shown as formula (I) in the description, and solid-liquid separation is performed, wherein Xis halogen, Y is halogen, C1-C14 alkyl, C6-C14 aryl, C1-C14 alkoxy or C6-C14 aryloxy; R1 is C1-C8 alkyl or C1-C8 naphthenic group; R2 and R3 are hydrogen, C1-C5 alkyl or haloalkyl independently; (2)a solid phase obtained by solid-liquid separation is directly mixed with an inert solvent without washing, and temperature of the obtained mixture is adjusted to subzero 50 DEG C-10 DEG C; (3) the mixture obtained in step (2) is subjected to a contact reaction with a titanium compound and an optional internal electron donor compound. The prepared catalyst component has high catalytic activity andbetter hydrogen response sensitivity.

The present invention relates to a preparation method of a solid catalyst component for olefin polymerization, an olefin polymerization catalyst and its application. The preparation method includes 1) dissolving magnesium halide in a solvent system preferably composed of an organic epoxy compound, an organic phosphorus compound and an inert diluent to form a solution; 2) dissolving the solution obtained in step 1) with a precipitation aid and titanium The compounds are contacted to produce a mixture containing a solid precipitate. According to the preparation method of the present invention, a novel catalyst with excellent particle shape and comprehensive performance can be obtained.

The invention relates to a catalyst component preparation method and a catalyst for vinyl polymerization. The method comprises the following step of: after proper chemical modification is performed on a magnesiumhalide alcoholic compound at a certain temperature, directly loading active ingredients such as titanium tetrachloride and the like to prepare the catalyst which can be applied to vinyl slurry polymerization and gas-phase polymerization. The method is simple and is easy to control. When catalyzing vinyl polymerization, the catalyst prepared by the method has high hydrogen regulation sensitivity; catalyst particles are compact, are difficult to crush, have good shapes, are spherical and have relatively high catalytic activity; and the obtained polymer particles are spherical and have a small amount of fine powder.