104results about How to "High viscosity average molecular weight" patented technology

The invention relates to a supported non-metallocene catalyst and a preparation method thereof. The supported non-metallocene catalyst is characterized by a simple and practical preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to an application of the supported non-metallocene catalyst in olefin homopolymerization / copolymerization. The application is characterized in that compared with the prior art, the dosage of the catalyst is lower.

The invention relates to a loaded non-metallocene catalyst and a preparation method and application thereof. The loaded non-metallocene catalyst has the characteristics of simple and practicable preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to the application of the loaded non-metallocene catalyst to the homopolymerisation / copolymerization of olefin. Compared with the prior art, the application has the characteristic of small using amount of a cocatalyst.

The invention relates to a loaded non-metallocene catalyst and a preparation method and application thereof. The loaded non-metallocene catalyst has the characteristics of simple and practicable preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to the application of the loaded non-metallocene catalyst to the homopolymerisation / copolymerization of olefin. Compared with the prior art, the application has the characteristic of small using amount of a cocatalyst.

The invention relates to a loaded non-metallocene catalyst and a preparation method and application thereof. The loaded non-metallocene catalyst has the characteristics of simple and practicable preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to the application of the loaded non-metallocene catalyst to the homopolymerisation / copolymerization of olefin. Compared with the prior art, the application has the characteristic of small using amount of a cocatalyst.

The invention relates to a loaded non-metallocene catalyst and a preparation method and application thereof. The loaded non-metallocene catalyst has the characteristics of simple and practicable preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to the application of the loaded non-metallocene catalyst to the homopolymerisation / copolymerization of olefin. Compared with the prior art, the application has the characteristic of small using amount of a cocatalyst.

The invention relates to a loaded non-metallocene catalyst and a preparation method and application thereof. The loaded non-metallocene catalyst has the characteristics of simple and practicable preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to the application of the loaded non-metallocene catalyst to the homopolymerisation / copolymerization of olefin. Compared with the prior art, the application has the characteristic of small using amount of a cocatalyst.

The invention discloses an acrylamide copolymer, and a preparation method and an application thereof. The acrylamide copolymer contains a constitutional unit A, a constitutional unit B, a constitutional unit C and a constitutional unit D, wherein the constitutional unit A is a constitutional unit represented by formula (1) and / or a constitutional unit represented by formula (2), the constitutional unit B is one or more of constitutional units represented by formula (3), formula (4), formula (5) and formula (6) respectively, the constitutional unit C is a constitutional unit represented by formula (7) and / or a constitutional unit represented by formula (8), and the constitutional unit D is a constitutional unit represented by formula (9) and / or a constitutional unit represented by formula (10); and the viscosity average molecular weight of the acrylamide copolymer is 2,000,000-25,000,000. The acrylamide copolymer has the advantages of high drag reduction rate, high heat and salt resistance, good high-shear resistance, good water solubility, good compatibleness with clay inhibitors (alcohol), and small damages to the stratum.

The present invention provides a modified AMPS / AM / acrylate ternary copolymer and a preparation method thereof. The method comprises: (1) purifying an AMPS crude product to achieve a content of an impurity MPS of less than or equal to 100 ppm, (2) preparing acrylamide and the purified AMPS monomer aqueous solution, and adopting an inorganic basic compound to adjust the pH value to 5-10 to obtain an AM / AMPS salt aqueous solution, (3) under an aqueous solution polymerization condition, in the presence of an initiation system and under the protection of an inert gas, carrying out polymerization on the AM / AMPS salt aqueous solution, and (4) carrying out granulation on the reaction product obtained from the step (3) to obtain colloidal particles, and carrying out contacting of the colloidal particles, sodium hydroxide and carbon disulfide, wherein the initiation system comprises a water-soluble azo initiator, an amine reducing auxiliary agent, a sulfite reducing agent and an oxidizing agent. The invention further relates to applications of the modified ternary copolymer. The modified ternary copolymer has high apparent viscosity and high apparent viscosity retention rate.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of processing the supported non-metallocene catalyst by a chemical treatment agent and precipitating a mixed slurry formed by a magnesium compound, alcohol and a solvent, loading a non-metallocene complex and directly drying. The preparation method is simple and feasible, and the load capacity of the non-metallocene ligand is adjustable. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, substantial copolymerization effect, high bulk density of polymer, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.

The invention discloses a method for preparing a polyacrylamide emulsion. The method comprises the following steps: mixing an acrylamide monomer, a double-bond-containing anionic monomer, a polymerizable emulsifier as shown in a formula 1 in the specification (n is an integer from 1-30, and m is an integer of 5-30), a chelating agent, an azo initiator, an oxidant and water to form an aqueous solution, and regulating the pH value of the aqueous solution to be 7-9; (2) mixing the emulsifier and an organic solvent to form an oil solution; (3) mixing the aqueous solution of which the pH value is 7-9 and the oil solution to form a water-in-oil emulsion; and (4) removing oxygen from the water-in-oil emulsion, and adding a reducing agent to react the water-in-oil emulsion sequentially at a first temperature and a second temperature, wherein the second temperature is higher than the first temperature. By adopting the method, the polyacrylamide emulsion which can be quickly dissolved in water, is good in stability of long-time storage, and has a relatively low content of monomer remained can be prepared, and the polyacrylamide has a relatively high viscosity-average molecular weight.

The invention discloses an acrylamide copolymer, and a preparation method and an application thereof. The acrylamide copolymer contains a constitutional unit A, a constitutional unit B, a constitutional unit C and a constitutional unit D, wherein the constitutional unit A is a constitutional unit represented by formula (1) and / or a constitutional unit represented by formula (2), the constitutional unit B is at least one of constitutional units represented by formula (3), formula (4), formula (5) and formula (6) respectively, the constitutional unit C is a constitutional unit represented by formula (7), and the constitutional unit D is a constitutional unit represented by formula (5) and / or a constitutional unit represented by formula (9); and the viscosity average molecular weight of the acrylamide copolymer is 5,000,000-18,000,000. The acrylamide copolymer has the advantages of high drag reduction rate, high heat and salt resistance, good high-shear resistance, good water solubility, good compatibleness with clay inhibitors (alcohol), and low damages to the stratum.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of dissolving a non-metallocene ligand in a magnesium compound solution, performing an in-situ reaction with a chemical treatment agent, and dipping a solution of a non-metallocene complex. The preparation method is simple and feasible, the ingredients content of the non-metallocene is adjustable, and the copolymerization effect is substantial. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the polymerization activity by catalysis of alkene is high, the bulk density of the polymer is high, and the molecular weight distribution is narrow and controllable.

The invention provides a terpolymer, characterized in that the terpolymer comprises a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A is a structural unit of formula (1), the structural unit B is at least one of the structural units of formula (2)-(4), the structural unit C is at least one of the structural units of formula (5)-(9), and the viscosity-average molecular weight of the terpolymer is 18,000,000-28,000,000. The invention further provides a polymer and its preparation method and application. According to the invention, the polymer of the invention has the advantages of high viscosity, good dissolvability, good high-speed shearing resistance, good injection and good advancing value of recovery efficiency.

The invention discloses an acrylamide polymer, its preparation method and its application, the method is characterized that under the condition of aqueous solution polymerization, under the protection of inert gas, an acrylamide-containing monomer aqueous solution and an initiator are contacted, wherein, the aqueous solution polymerization condition comprises: the polymerization initial temperature is -10-15 DEG C, the polymerization time is 4-15 hours, and the temperature difference of the highest temperature and the lowest temperature in a polymerization process is 10-50 DEG C. The product performance of the polyacrylamide polymer is greatly better than that of the current products.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of performing in-situ loading on a non-metallocene complex and dipping a solution. The preparation method is simple and feasible, the ingredients capacity of the non-metallocene is adjustable, and the copolymerization effect is substantial. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the polymerization activity by catalysis of alkene is high, the bulk density of the polymer is high, and the molecular weight distribution is controllable.

The invention provides an acrylamide terpolymer, characterized in that the acrylamide terpolymer comprises a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A is a structural unit of formula (1), the structural unit B is at least one of the structural units of formula (2)-(4), the structural unit C is a structural unit of formula (5) or (6), and the viscosity-average molecular weight of the acrylamide terpolymer is 18,000,000-25,000,000. The invention further provides a polymer and its preparation method and application. According to the invention, the polymer of the invention has the advantages of high viscosity, good dissolvability, good high-speed shearing resistance, good injection and good advancing value of recovery efficiency.

The invention relates to a supported non-metallocene catalyst, a preparation method and an application. The supported non-metallocene catalyst is prepared by the steps of introducing a first non-metallocene complex in a magnesium compound solution, processing by a chemical treatment agent and then reacting with a second non-metallocene complex. The method of the invention has the characteristics of simple and feasible process, controllable content of non-metallocene compounds and substantial copolymerization effect and the like. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the polymerization activity by catalysis of alkene is high, the bulk density of the polymer is high, and the molecular weight distribution is controllable.

The invention provides a refining method of a 2-acrylamide-2-methylpropanesulfonic acid (AMPS) crude product and AMPS prepared by the method. The method comprises the steps of contacting the AMPS crude product with alcohol with carbon number being 1-4 at 0-45 DEG C and then carrying out solid-liquid separation to obtain solid, dissolving the obtained solid in an acetic acid water solution and then contacting the acetic acid water solution in which the solid is dissolved with activated carbon and crystallizing the solution obtained after contact. According to AMPS prepared by the refining method, the molecular weight of the multipolymer formed by polymerizing the refined AMPS can be greatly increased.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of introducing a non-metallocene complex in a magnesium compound solution, treating by a chemical treatment agent and performing an in-situ reaction with a non-metallocene ligand. The preparation method is simple and feasible, the ingredients content of the non-metallocene is adjustable, and the copolymerization effect is substantial. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the polymerization activity by catalysis of alkene is high, the bulk density of the polymer is high, and the molecular weight distribution is narrow and controllable.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of processing the supported non-metallocene catalyst by a chemical treatment agent and precipitating a magnesium compound solution formed by a magnesium compound, alcohol and a solvent, loading a non-metallocene complex and directly drying. The preparation method is simple and feasible, and the load capacity of the non-metallocene ligand is adjustable. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, substantial copolymerization effect, high bulk density of polymer, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.

The invention discloses a preparation method of a polyacrylamide emulsion, and the method is as follows: (1) mixing an acrylamide series monomer, a double-bond-containing negative ion monomer, a polymerizable emulsifier, a chelating agent, an azo initiator and an oxidizing agent with water to form an aqueous solution, and adjusting the aqueous solution pH value to 7-9; (2) mixing an emulsifier and an organic solvent to form an oil solution; (3) mixing the aqueous solution and the oil solution to form a water in oil emulsion; (4) deoxidizing the water in oil emulsion, adding a reducing agent for polymerization of the water in oil emulsion orderly at a first temperature and a second temperature, wherein the second temperature is higher than the first temperature. By using the method provided by the invention; the polyacrylamide emulsion with higher viscosity average molecular weight of polyacrylamide, better long-term storage stability, lower residual monomer content and rapid dissolution ability in water can be prepared.

The invention relates to a two-step preparation method of an acrylamide copolymer. The two-step preparation method is characterized in that by initiation of a novel low-temperature oxidation-reduction composite initiation system, acrylamide (AM), 2-acrylamide-2-methylpro panesulfonic acid (AMPS) and allylthiourea undergo an aqueous solution adiabatic polymerization reaction, rubber bricks are subjected to primary granulation, the rubber granules are subjected to hydrolysis, the hydrolysis product is subjected to secondary granulation, and the granules are dried, crushed and screened so that the acrylamide copolymer is obtained. The acrylamide copolymer has good high-temperature oxidation resistance. The invention discloses the oxidation-resistant polyacrylamide oil-displacement agent and the preparation method thereof.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of directly drying a magnesium compound slurry containing a non-metallocene ligand and a porous carrier, and reacting with an IVB group chemical treating agent. The preparation method is simple and feasible, and the load capacity of the non-metallocene ligand is adjustable. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, substantial copolymerization effect, high bulk density of polymer, narrow molecular weight distribution, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of precipitating a magnesium compound slurry containing a non-metallocene ligand and a porous carrier, and treating with an IVB group chemical treating agent; the preparation method is simple and feasible, the load capacity of the non-metallocene ligand is adjustable, and the combination of each compound in the catalyst is close. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, substantial copolymerization effect, high bulk density of polymer, narrow molecular weight distribution, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.

The invention relates to an AlOOH catalyst for polyester polycondensation and a preparation method of the AlOOH catalyst. The AlOOH catalyst comprises AlOOH or a mixture of AlOOH and Al2O3. The preparation method of the catalyst comprises the following steps in sequence: uniformly mixing sodium aluminate solution with an additive; adjusting pH; reacting; centrifugally layering; cleaning the obtained solid matter; drying; and grinding, thus obtaining the AlOOH catalyst for polyester polycondensation, wherein the mass ratio of sodium aluminate to the additive is 1: 1 to 2000: 1. The nanometer AlOOH catalyst is simple in preparation method, can be prepared without high temperature condition, and is low in cost, rich in raw material sources, and beneficial for industrial popularization; the catalyst with higher catalyzing activity can be used for preparing polyester; the obtained polyester chip has higher characteristic viscosity; and the catalyst is free of a heavy metal element compound, and is expected to replace an antimony catalyst in the modern polyester industry.

The invention provides an acrylamide terpolymer, characterized in that the acrylamide terpolymer comprises a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A is a structural unit of formula (1), the structural unit B is at least one of the structural units of formula (2)-(4), the structural unit C is at least one of the structural units of formula (5)-(7), and the viscosity-average molecular weight of the acrylamide terpolymer is 18,000,000-28,000,000. The invention further provides a polymer and its preparation method and application. According to the invention, the polymer of the invention has the advantages of high viscosity, good dissolvability, good high-speed shearing resistance, good injection and good advancing value of recovery efficiency.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of precipitating a mixed slurry formed by a magnesium compound, alcohol and a solvent, treating with an IVB group chemical treating agent; then loading a non-metallocene complex; the preparation method is simple and feasible, and the load capacity of the non-metallocene ligand is adjustable. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, substantial copolymerization effect, high bulk density of polymer, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of precipitating a mixed slurry of a magnesium compound and a solvent, loading a non-metallocene complex, treating with an IVB group chemical treating agent and directly drying. The preparation method is simple and feasible, and the load capacity of the non-metallocene ligand is adjustable. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, substantial copolymerization effect, high bulk density of polymer, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of processing the supported non-metallocene catalyst by a chemical treatment agent and precipitating a mixed slurry formed by a magnesium compound, a porous carrier and a solvent, loading a non-metallocene complex, processing by a chemical treatment agent and directly drying. The preparation method is simple and feasible, and the load capacity of the non-metallocene ligand is adjustable. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, substantial copolymerization effect, high bulk density of polymer, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of precipitating a mixed slurry formed by a magnesium compound, a porous carrier and a solvent, and then loading a non-metallocene complex and directly drying; the preparation method is simple and feasible, and the load capacity of the non-metallocene ligand is adjustable. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation / copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, narrow molecular weight distribution, substantial copolymerization effect, high bulk density of polymer, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.