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Supported vanadium alkene polymerization catalyst, preparation method and applications thereof

A technology for olefin polymerization and catalysts, applied in the field of supported vanadium-based olefin polymerization catalysts and their preparation, can solve the problems of unstable activity, high carrier cost, and complicated loading process, and achieve high controllability and good shape and performance The prospect of industrialization and the effect of low raw material prices

Active Publication Date: 2016-03-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the activity of supported vanadium oxide catalysts reported in the literature is very low, even lower than that of Ziegler-Natta type vanadium-based catalysts, and the reaction conditions used are generally harsh, generally requiring a polymerization pressure of about 30 MPa and a temperature of Above 100°C, so it is difficult to have industrial application value
[0005] In summary, the developed vanadium-based polyolefin catalysts have defects such as low catalytic activity, extremely unstable activity, and low polymerization temperature.
In addition, for Ziegler-Natta type vanadium-based catalysts, due to the complex loading process and the selected MgCl 2 The cost of the carrier is high, so its manufacturing cost is high

Method used

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  • Supported vanadium alkene polymerization catalyst, preparation method and applications thereof
  • Supported vanadium alkene polymerization catalyst, preparation method and applications thereof
  • Supported vanadium alkene polymerization catalyst, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Embodiment 1: Get 10g silica gel (pore volume is 1.5~1.7cm 3 / g, the surface area is 250~300m 2 / g) impregnated with zirconium nitrate, ammonium sulfate and metavanadic acid aqueous solution at 50°C, wherein the additions of zirconium, sulfur and vanadium were 2%, 2% and 0.5% respectively (according to zirconium, sulfur and vanadium in the catalyst weight fraction in the precursor). After impregnating with continuous stirring for 4 hours, the temperature was raised to 120°C and dried for 12 hours, and then the dried product was placed in a fluidized bed and calcined at 500°C under a high-purity air atmosphere. The roasting procedure is shown in the appendix image 3 , the calcined catalyst precursor was naturally cooled from the calcining temperature to 300 °C in a high-purity air atmosphere, and then switched to a nitrogen atmosphere to naturally cool to room temperature. Finally, the catalyst precursors were collected and stored in a glove box under a nitrogen atmos...

Embodiment 2

[0123] Embodiment 2: get 10g silica gel (pore volume is 1.5~1.7cm 3 / g, the surface area is 250~300m 2 / g) impregnated with zirconium nitrate aqueous solution at 50° C., wherein the addition of zirconium to the silica gel is 2% (calculated by zirconium weight). After continuous stirring and impregnating for 4 hours, the temperature was raised to 120°C and dried for 12 hours, and then the dried product was placed in a fluidized bed and calcined at 500°C under a high-purity air atmosphere, and the calcined product was naturally cooled from the calcining temperature to room temperature. The roasting procedure is as attached figure 1 shown. Subsequently, the above roasted product was impregnated with an aqueous solution containing ammonium metavanadate and ammonium sulfate at 50° C., wherein the added amounts of vanadium and sulfur were 0.5% and 2% (by weight of vanadium and sulfur) respectively. After continuously stirring and impregnating for 4 hours, the temperature was rais...

Embodiment 3

[0124] Embodiment 3: get 10g silica gel (pore volume is 1.5~1.7cm 3 / g, the surface area is 250~300m 2 / g) impregnation with ammonium sulfate aqueous solution at 50° C., wherein the addition of sulfur to the silica gel is 2% (by weight of sulfur). After continuous stirring and impregnating for 4 hours, the temperature was raised to 120°C and dried for 12 hours, and then the dried product was placed in a fluidized bed and calcined at 500°C under a high-purity air atmosphere, and the calcined product was naturally cooled from the calcining temperature to room temperature. The roasting procedure is as attached figure 1 shown. Then impregnate the above roasted product with an aqueous solution containing ammonium metavanadate and zirconium nitrate at 50° C., wherein the added amounts of vanadium and zirconium are 0.5% and 2% (by weight of vanadium and zirconium) respectively. After continuously stirring and impregnating for 4 hours, the temperature was raised to 120°C for 12 hou...

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Abstract

The invention relates to a supported vanadium alkene polymerization catalyst, which comprises a porous inorganic carrier, a catalyst composite modifying component, a vanadium containing component, and a catalyst activating component; wherein the catalyst composite modifying component is the product of high temperature burning of a first soluble compound and / or a second soluble compound, and the vanadium containing component is the product of high temperature burning of a third compound. Compared with the conventional Ziegler-Natta vanadium catalysts, the provided supported vanadium alkene polymerization catalyst has the advantages of higher and more stable activity, wider range of polymerization temperature, and excellent copolymerization performance.

Description

technical field [0001] The invention relates to a supported vanadium-based olefin polymerization catalyst, a preparation method and application thereof. technical background [0002] Polyethylene (PE) resin is a thermoplastic product obtained by homopolymerization of ethylene or copolymerization of ethylene and α-olefin. Because polyethylene has many advantages such as low density, chemical corrosion resistance, impact resistance, good insulation, and low price, it has become the most widely used plastic. Distinguished from the structure of polyethylene, it can be mainly divided into high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) and low-density polyethylene (LDPE). Among them, high-density polyethylene contains a very small amount of branched chains, which are generally used for injection molding or blow molding; low-density polyethylene contains more long and short branched chains, and is often used in the production of film products; linear low...

Claims

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Application Information

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IPC IPC(8): C08F110/02C08F4/68C08F4/685C08F4/02
CPCC08F110/02C08F4/68C08F4/685C08F4/025
Inventor 金玉龙刘柏平赵柠程瑞华何雪莲刘振
Owner EAST CHINA UNIV OF SCI & TECH
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