US-12624133-B2 - Solid catalyst component for polymerization of olefin and method for producing the same, catalyst for polymerization of olefin and method for producing the same, and method for producing polymer of olefin

Abstract

The present invention provides a solid catalyst component for polymerization of an olefin, which appropriately suppresses a decrease in polymerization activity per unit time when having been supplied to the polymerization of the olefin, even without using a phthalic acid ester, and can easily prepare a polymer of an olefin, in which drying efficiency is improved, and a content ratio of a remaining volatile organic compound is greatly reduced in a short period of time. The solid catalyst component for polymerization of an olefin includes magnesium, titanium, halogen and a 1,3-diether compound, wherein a ratio of the 1,3-diether compound contained in the solid catalyst component for polymerization of an olefin is 2.50 to 15.00% by mass, and a specific surface area of the solid catalyst component for polymerization of an olefin is 250 m 2 /g or larger.

Inventors

• Motoki Hosaka

Assignees

• TOHO TITANIUM CO., LTD.

Dates

Publication Date

20260512

Application Date

20210315

Priority Date

20200428

Claims (1)

1. 1 . A method for producing a solid catalyst component for polymerization of an olefin, the solid catalyst component for polymerization of an olefin comprising magnesium, titanium, halogen and a 1,3-diether compound, wherein the method for producing the solid catalyst component does not include an alcohol, wherein a ratio of the 1,3-diether compound contained in the solid catalyst component for polymerization of an olefin is 2.50 to 15.00% by mass, and a specific surface area of the solid catalyst component for polymerization of an olefin is 250 m 2 /g or larger, the method comprising: contacting a magnesium compound having a specific surface area of 5 m 2 /g to 40 m 2 /g, a tetravalent titanium halogen compound, and a 1,3-diether compound with each other.

Description

TECHNICAL FIELD The present invention relates to a solid catalyst component for polymerization of an olefin and a method for producing the same; a catalyst for polymerization of an olefin and a method for producing the same; and a method for producing a polymer of an olefin. BACKGROUND ART In recent years, polyolefins such as polypropylene (PP) have been used in various applications such as containers and films, in addition to molded products such as automobile parts and household electric appliances. Conventionally, as a method for polymerizing olefins, there have been proposed many methods for polymerizing olefins, which are methods of polymerizing propylene alone or with another α-olefin with the use of a solid catalyst component which contains magnesium, titanium, halogen and an internal electron-donating compound as essential components, or a catalyst for polymerization of an olefin, which contains an organoaluminum compound and an external electron-donating compound (for example, see Patent Literature 1 to Patent Literature 3). CITATION LIST Patent Literature [Patent Literature 1] Japanese Patent Laid-Open No. 57-63310[Patent Literature 2] U.S. Pat. No. 4,399,054[Patent Literature 3] National Publication of International Patent Application No. 2016-532738 SUMMARY OF INVENTION Technical Problem As described in Patent Literature 1, the catalyst for polymerization of an olefin with the use of a phthalic acid ester as an electron-donating compound has conventionally been widely used. However, di-n-butyl phthalate and benzyl butyl phthalate, which are one type of phthalic acid esters, are identified as Substance of Very High Concern (SVHC) in European regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals (REACH). Then, from the viewpoint of environmental load reduction, there is an increasing demand for conversion to a catalyst system that does not use an SVHC substance. Meanwhile, known catalyst systems that uses an electron-donating compound which is not subject to SVHC regulation include a catalyst system that uses a succinic acid ester, a maleic acid ester, a malonic acid ester or the like, and catalyst systems described in Cited Literature 2 and Cited Literature 3. However, even in these catalyst systems, it has been difficult to exhibit the same performance as in the case of using the phthalic acid ester. In particular, in a polymerization facility in which there is a process in which a solid catalyst component, an organoaluminum compound, and an external electron-donating compound are contacted with each other in an inert gas atmosphere such as a nitrogen atmosphere, when an electron-donating compound is used which is not a substance subject to SVHC regulation, there is a tendency that the polymerization activity is remarkably lowered. Under such circumstances, further improvement has been required for a catalyst for polymerization of an olefin, to which an electron-donating compound is applied that is not subject to the SVHC regulation. In addition, when such a conventional catalyst for polymerization is used, there is a case where an unreacted monomer or oligomer, or an organic solvent remains which has been used at the time of polymerization, as a volatile organic compound, in an obtained polymer of the olefins. Because of this, the volatile organic compound is degassed in a reaction device after the polymerization reaction, and then the polymer of the olefin is transferred to a post-step. However, even in the case of a polymer of an olefin, in which an amount of remaining gas is small, when it takes time to degas the polymer, there is a concern that a pressure in a system increases in the post-step or a mixing ratio of impurities into a recycle system increases, and thereby it becomes easy to cause a process trouble or deterioration in a quality of an obtained polymer. For this reason, it has been desired not only that the amount of the volatile organic compound remaining in the polymer is small, but also that the volatile organic compound remaining in the polymer is desorbed in a short period of time, but the catalyst for polymerization has not necessarily been proposed, which can greatly reduce a content ratio of the volatile organic compound in the polymer in a short period of time. Under such circumstances, an object of the present invention is to provide a solid catalyst component for polymerization of an olefin, which appropriately suppresses a decrease in polymerization activity per unit time when having been supplied to the polymerization of the olefin, even without using a phthalic acid ester, and can easily prepare the polymer of an olefin, in which drying efficiency is improved, and a content ratio of a remaining volatile organic compound is greatly reduced in a short period of time, and a method for producing the same; a catalyst for polymerization of an olefin, and a method for producing the same; and a method for producing the polymers of th