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Solid catalyst component for olefin polymerization, catalyst for olefin polymerization, and method for producing olefin polymer

A technology of olefin polymers and solid catalysts, which is applied in the field of solid catalyst components for olefin polymerization, can solve problems such as hydrogen limit, heat resistance strength reduction, and cost problems, and achieve high hydrogen activity and polymerization activity with low load Effect

Active Publication Date: 2016-06-29
TOHO TITANIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the polymerization reactor has a pressure limit from the standpoint of its safety, and the amount of hydrogen that can be added is also limited.
Therefore, in order to add more hydrogen, the partial pressure of the monomer used in the polymerization has to be lowered, and in this case, the production efficiency will be lowered
In addition, due to the large amount of hydrogen used, there will also be problems in terms of cost
In addition, polymers produced by adding a large amount of hydrogen have a marked decrease in stereoregularity as the MFR increases, and may cause adverse effects on the product, such as a decrease in heat resistance strength due to a decrease in viscosity and melting point of the polymer. bad result

Method used

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  • Solid catalyst component for olefin polymerization, catalyst for olefin polymerization, and method for producing olefin polymer
  • Solid catalyst component for olefin polymerization, catalyst for olefin polymerization, and method for producing olefin polymer

Examples

Experimental program
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Effect test

Embodiment 1）

[0193] (1) Preparation of solid catalyst components

[0194] 10 g of diethoxymagnesium and 80 mL of toluene were placed in a 500-mL round-bottomed flask with a capacity of a stirrer fully substituted with nitrogen to form a suspended state. Next, 20 mL of titanium tetrachloride was added to the suspension solution, and then the temperature was raised. When the temperature reached 80° C., 3.10 mL of diisobutylmalonate dimethyl was added, and the temperature was further raised to 110° C. Then, the reaction was carried out for 1 hour while stirring while maintaining the temperature of 110°C. Next, wash 3 times with 100 mL of toluene at 90°C, add 20 mL of titanium tetrachloride and 80 mL of toluene again, raise the temperature to 110°C, and react for 1 hour while stirring, then wash with 100 mL of n-heptane at 40°C 7 times , to obtain a solid catalyst component. Furthermore, the solid-liquid in this solid catalyst component was separated, and the titanium content in the solid ca...

Embodiment 2）

[0208] 20 g of diethoxymagnesium and 100 mL of toluene were placed in a 200-mL round-bottomed flask with a stirrer fully replaced with nitrogen gas to form a suspension, and then 3.00 mL of dimethyl diisobutylmalonate was added. , and keep the liquid temperature at 10°C to obtain a suspension solution. On the other hand, in a round-bottomed flask with a capacity of 500 mL of a stirrer fully replaced with nitrogen, a mixed solution composed of 40 mL of titanium tetrachloride and 60 mL of toluene was preliminarily charged, and the liquid temperature was kept at 10° C. for subsequent use. The above-mentioned suspension was added to this mixed solution. Next, the temperature of the liquid was raised from 10°C to 90°C over 80 minutes, and when it reached 90°C, 3.50 mL of dimethyl diisobutylmalonate was added, and the liquid temperature was maintained at 90°C while stirring. React for 2 hours.

[0209] After the reaction, the obtained solid product was washed 4 times with 200 mL o...

Embodiment 3）

[0212] Except for using 4.50 mL of diisobutyl dimethyl malonate instead of 3.10 mL of diisobutyl dimethyl malonate, the same operation was carried out as in Example 1 to prepare a solid catalyst component, and then carry out a polymerization catalyst preparation and polymerization reactions. The titanium content in the obtained solid catalyst component was 2.9% by mass.

[0213] Moreover, it carried out similarly to Example 1, and the polymerization activity per gram of solid catalyst component, the xylene-soluble content (XS) and MFR of the obtained polymer were calculated|required. The results are shown in Table 1.

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Abstract

An environmentally-friendly solid catalyst component for olefin polymerization exhibits high hydrogen activity and high polymerization activity, can produce a polymer that exhibits a high MFR and high stereoregularity in high yield using a small amount of hydrogen, and exhibits high copolymerization activity and excellent copolymerization properties (e.g., block ratio). The solid catalyst component for olefin polymerization is produced by bringing (a) a magnesium compound, (b) an internal electron donor, and (c) a tetravalent-element halogen compound into contact with each other in an inert organic solvent, the internal electron donor (b) being represented by R 1 2 C(COOCH 3 ) 2 (wherein R 1 is selected from a branched alkyl group having 3 to 20 carbon atoms, a halogen atom, a linear or branched halogen-substituted alkyl group having 2 to 20 carbon atoms, a linear alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a vinyl group, and an allyl group).

Description

technical field [0001] The present invention relates to a solid catalyst component for olefin polymerization, a catalyst for olefin polymerization, and a method for producing an olefin polymer. Background technique [0002] It is known that a solid catalyst component containing magnesium, titanium, an electron donor, and a halogen as essential components is used for the polymerization of olefins such as propylene, and many proposals have been made for the above-mentioned solid catalyst component, an organoaluminum compound, and an organosilicon compound. A method of polymerizing or copolymerizing olefins in the presence of a catalyst for olefin polymerization. [0003] For example, in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 63-3010), the following method is proposed: contacting dialkoxymagnesium, aromatic dicarboxylic acid diester, aromatic hydrocarbon compound and titanium halide The obtained product is heat-treated in a powder state to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/654C08F4/658C08F10/00
CPCC08F10/00C08F110/06C08F210/06C08F4/651C08F4/6548C08F2500/12C08F210/16
Inventor 保坂元基
Owner TOHO TITANIUM CO LTD
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