Toho Titanium Co.

Chigasaki, Japan

Toho Titanium Co.

Chigasaki, Japan

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Patent
Toho Titanium Co. | Date: 2015-03-11

A method for producing a potassium titanate easily produces a potassium titanate having a high single phase ratio and a significantly reduced fibrous potassium titanate content in high yield. The method for producing a potassium titanate includes: a mixing step that mixes a titanium raw material with a potassium raw material, the titanium raw material including 0 to 60 mass % of titanium oxide having a specific surface area of 1 to 2 m^(2)/g, 40 to 100 mass % of titanium oxide having a specific surface area of 7 to 200 m^(2)/g, and 0 to 4.5 mass % in total of one or more materials selected from titanium metal and titanium hydride, and the potassium raw material including a potassium compound; a calcination step that calcines a raw material mixture obtained by the mixing step at a calcination temperature of 950 to 990 C.; and a grinding step that grinds a calcined powder obtained by the calcination step using one or more means selected from a vibrating mill and an impact pulverizer.


Patent
Toho Titanium Co. | Date: 2017-03-08

A method for producing a potassium titanate easily produces a potassium titanate having a high single phase ratio and a significantly reduced fibrous potassium titanate content in high yield. The method for producing a potassium titanate includes: a mixing step that mixes a titanium raw material with a potassium raw material, the titanium raw material including 0 to 60 mass% of titanium oxide having a specific surface area of 1 to 2 m^(2)/g, 40 to 100 mass% of titanium oxide having a specific surface area of 7 to 200 m^(2)/g, and 0 to 4.5 mass% in total of one or more materials selected from titanium metal and titanium hydride, and the potassium raw material including a potassium compound; a calcination step that calcines a raw material mixture obtained by the mixing step at a calcination temperature of 950 to 990C; and a grinding step that grinds a calcined powder obtained by the calcination step using one or more means selected from a vibrating mill and an impact pulverizer.


Patent
Toho Titanium CO. | Date: 2017-07-05

A method for producing a propylene-based block copolymer produces a propylene-based copolymer that exhibits excellent stereoregularity, rigidity, and impact resistance in a convenient and efficient manner while achieving high polymerization activity. The method for producing a propylene-based block copolymer includes bringing a catalyst into contact with propylene, or propylene and an -olefin, and bringing an electron donor compound into contact with the resulting product to produce a propylene-based block copolymer, the catalyst including a solid catalyst component that includes titanium, magnesium, a halogen, and an internal electron donor compound, a specific organoaluminum compound, and a specific external electron donor compound.


High stereoregularity, highly active catalytic performance, and good hydrogen response can be obtained by homopolymerizing propylene in the presence of a catalyst that includes a solid catalyst component including titanium, magnesium, a halogen, a carbonate compound represented by the following formula, and a diether compound. Excellent polymerization behavior can also be obtained when effecting random copolymerization or block copolymerization.R^(1)-O-C(=O)-O-Z-O-R^(2)(1)wherein R^(1) and R^(2) are a hydrocarbon group or a substituted hydrocarbon group having 1 to 24 carbon atoms, or a heteroatom-containing group, provided that R^(1) and R^(2) are either identical or different, and Z is a linking group that links two oxygen atoms through a carbon atom or a carbon chain.


A method for producing a solid catalyst component for olefin polymerization produces a novel solid catalyst component for olefin polymerization that achieves excellent olefin polymerization activity and activity with respect to hydrogen during polymerization, and can produce an olefin polymer that exhibits a high MFR, high stereoregularity, and excellent rigidity. The method includes a first step that brings a magnesium compound, a tetravalent titanium halide compound, and one or more first internal electron donor compounds excluding an aromatic dicarboxylic acid diester into contact with each other to effect a reaction, followed by washing; a second step that brings a tetravalent titanium halide compound and one or more second internal electron donor compounds into contact with a product obtained by the first step to effect a reaction, followed by washing; and a third step that brings one or more third internal electron donor compounds into contact with a product obtained by the second step to effect a reaction.


A method produces a novel solid catalyst component for olefin polymerization that achieves excellent olefin polymerization activity and activity with respect to hydrogen during polymerization, and can produce an olefin polymer that exhibits a high MFR, high stereoregularity, and excellent rigidity. The method includes a first step that brings a magnesium compound, a tetravalent titanium halide compound, and one or more first internal electron donor compounds into contact with each other to effect a reaction, followed by washing; a second step that brings one or more second internal electron donor compounds into contact with a product obtained by the first step to effect a reaction; and a third step that brings a tetravalent titanium halide compound and one or more third internal electron donor compounds into contact with a product obtained by the second step to effect a reaction.


Patent
Toho Titanium Co. | Date: 2016-01-06

A method for producing a propylene-based block copolymer ensures excellent olefin polymerization activity and activity with respect to hydrogen (hydrogen response) during polymerization, and produces a propylene-based block copolymer that exhibits a high MFR, high stereoregularity, and excellent rigidity. The method includes copolymerizing propylene and an -olefin in the presence of a catalyst that includes (I) a solid catalyst component that includes titanium, magnesium, a halogen, and a compound represented by R^(1)O-C(=O)-O-Z-OR^(2), and (II) a compound represented by R^(3)_(p)AlQ_(3-p), to obtain a propylene-based block copolymer.


A solid catalyst component for olefin polymerization includes titanium, magnesium, a halogen, a compound represented by (R^(1))_(k)C_(6)H_(4-k)(COOR^(2))(COOR^(3)), and a compound represented by R^(4)O-C(=O)-O-Z-OR^(5). The solid catalyst component is a novel solid catalyst component for olefin polymerization that achieves excellent olefin polymerization activity and activity with respect to hydrogen during polymerization, and can produce an olefin polymer that exhibits a high MFR, high stereoregularity, and excellent rigidity.


Patent
Toho Titanium Co. | Date: 2016-05-18

The invention has an object to provide a catalyst for polymerizing or copolymerizing an -olefin, catalyst constituent thereof, and method of polymerizing -olefins with the catalyst, for production of -olefin polymers or copolymers with high hydrogen response, high polymarization reaction rate, high stereoregularity and excellent melt fluidity. The invention discloses a catalyst constituent of the catalyst for polymerizing or copolymerizing an -olefin, represented by Formula 37 or 38: Formula 37Si(OR^(1))_(3)(NR^(2)R^(3))(where in Formula 37 , R^(1) is a hydrocarbon group with 1 to 6 carbon atoms; R^(2) is a hydrocarbon group with 1 to 12 carbon atoms or hydrogen; and R^(3) is a hydrocarbon group with 1 to 12 carbon atoms) Formula 38RNSi(OR^(1))_(3)(where in Formula 38, R^(1) is a hydrocarbon group with 1 to 6 carbon atoms; and RN is a cyclic1 amino group).


Patent
Toho Titanium Co. | Date: 2016-01-27

A method for producing a potassium titanate easily and inexpensively produces a potassium titanate that exhibits high thermal stability and has a significantly low fibrous potassium titanate content. The method for producing a potassium titanate includes calcining a raw material mixture by heating the raw material mixture to a maximum calcination temperature that exceeds 1000C while controlling the heating rate from 1000C to the maximum calcination temperature to 15C/min or less to obtain a calcine, and cooling the calcine while controlling the cooling rate from the maximum calcination temperature to 500C to 100C/min or more, followed by grinding, the raw material mixture including a titanium compound and a potassium compound so that the molar ratio (number of moles of titanium compound on a titanium atom basis/number of moles of potassium compound on a potassium atom basis) of the number of moles of the titanium compound on a titanium atom basis to the number of moles of the potassium compound on a potassium atom basis is 2.7 to 3.3.

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