Nippon Chemical Industrial Co.

Kōtō-ku, Japan

Nippon Chemical Industrial Co.

Kōtō-ku, Japan
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Patent
Nippon Chemical Industrial Co. | Date: 2015-09-30

The invention provides an industrially advantageous method for producing a crystalline silicotitanate having high adsorption/removal capabilities for cesium and strontium in seawater. The method includes a first step of mixing a silicic acid source, a sodium compound, titanium tetrachloride, and water to prepare a mixed gel and a second step of hydrothermal reaction of the mixed gel prepared in the first step to produce crystalline silicotitanate of formula: Na_(4)Ti_(4)Si_(3)O_(16).nH_(2)O (wherein n represents 0 to 8). In the first step, the silicic acid source, sodium compound, and titanium tetrachloride are mixed in such a mixing ratio that the resulting mixed gel may have a Ti to Si molar ratio, Ti/Si, of 1.2 to 1.5 and an Na_(2)O to SiO_(2 )molar ratio, Na_(2)O/SiO_(2), of 0.7 to 2.5.


Patent
Nippon Chemical Industrial Co. | Date: 2017-07-12

The invention provides an industrially advantageous method for producing a crystalline silicotitanate having high adsorption/removal capabilities for cesium and strontium in seawater. The method includes a first step of mixing a silicic acid source, a sodium compound, titanium tetrachloride, and water to prepare a mixed gel and a second step of hydrothermal reaction of the mixed gel prepared in the first step to produce crystalline silicotitanate of formula: Na_(4)Ti_(4)Si_(3)O_(16)nH_(2)O (wherein n represents 0 to 8). In the first step, the silicic acid source, sodium compound, and titanium tetrachloride are mixed in such a mixing ratio that the resulting mixed gel may have a Ti to Si molar ratio, Ti/Si, of 1.2 to 1.5 and an Na_(2)O to SiO_(2) molar ratio, Na_(2)O/SiO_(2), of 0.7 to 2.5.


Patent
Nippon Chemical Industrial Co. | Date: 2015-07-22

The objective of the present invention is to provide, in an industrially advantageous method, -lithium aluminate which has various favorable physical properties as a MCFC electrolyte holding plate with excellent heat stability and chemical stability, even when the -lithium aluminate is minute with the BET specific surface area being 10 m2/g or greater. A method for producing -lithium aluminate is characterized by mixing hydrated alumina and lithium carbonate in an Al/Li molar ratio of 0.95-1.01 and subjecting the obtained mixture (a) to a first firing reaction to obtain a fired product, and then subjecting a mixture (b) which is the obtained fired product to which an aluminum compound is added to a second firing reaction.


Provided is an electrochemical luminescent cell 10 having a luminescent layer 12 and electrodes 13, 14 provided on each surface of the luminescent layer 12. The luminescent layer 12 comprises an organic polymeric luminescent material and a combination of at least two organic salts. In particular, the luminescent layer preferably comprises a combination of at least two types of ionic liquids represented by formula (1) (wherein R_(1), R_(2), R_(3) and R_(4) each represent an optionally-substituted alkyl group, alkoxy alkyl group, trialkylsilylalkyl group, alkenyl group, alkynyl group, aryl group or heterocylic group. R_(1), R_(2), R_(3) and R_(4) may be the same or different. M represents N or P. X^(-) represents an anion.)


Patent
Fuji Jukogyo Kabushiki Kaisha and Nippon Chemical Industrial Co. | Date: 2015-05-06

Provided is a lithium ion secondary battery having a large energy density and an improved capacity retention rate after repeated use even under high voltage application (cycle characteristics), and excellent in safety. A lithium ion secondary battery containing a negative electrode for reversibly intercalating and deintercalating lithium ions, a positive electrode containing lithium vanadium phosphate, and a non-aqueous electrolytic solution containing lithium fluoroethyl phosphate as an electrolyte can be obtained.


Patent
Nippon Chemical Industrial Co. | Date: 2016-11-23

A method for producing a nonatitanate of an alkali metal, the method having: a first step for reacting an alkali metal hydroxide with titanium tetrachloride and producing Ti(OH)_(4); a second step for mixing the resulting Ti(OH)_(4) and an alkali metal hydroxide; and a third step for heating the mixture obtained in the second step, the alkali metal hydroxide being used so that the A/Ti molar ratio (A represents an alkali metal element) falls within a range of 1.0-5.0 in the second step, wherein a nonatitanate of an alkali metal can be produced economically.


Patent
Fuji Jukogyo Kabushiki Kaisha and Nippon Chemical Industrial Co. | Date: 2015-05-13

It is intended to provide an electric storage device that has excellent charging characteristics, particularly at a low temperature. Hence, provided is a nonaqueous solvent-based electric storage device containing as positive electrode active materials, at least one of a lithium nickel aluminum complex oxides and a spinel-type lithium manganese oxide active material having LiMn_(2)O_(4) as a basic structure, and lithium vanadium phosphate.


Patent
Nippon Chemical Industrial Co. | Date: 2015-02-18

A method for producing a nonatitanate of an alkali metal, the method having: a first step for reacting an alkali metal hydroxide with titanium tetrachloride and producing Ti(OH)_(4); a second step for mixing the resulting Ti(OH)_(4 )and an alkali metal hydroxide; and a third step for heating the mixture obtained in the second step, the alkali metal hydroxide being used so that the A/Ti molar ratio (A represents an alkali metal element) falls within a range of 1.0-5.0 in the second step, wherein a nonatitanate of an alkali metal can be produced economically.


Patent
Nippon Chemical Industrial Co. | Date: 2016-10-03

There are provided an adsorbent material excellent in the adsorptive removal properties of Cs and Sr also in seawater, and a method for producing a crystalline silicotitanate suitable for the adsorbent material. The adsorbent material according to the present invention comprises: at least one selected from crystalline silicotitanates represented by Na_(4)Ti_(4)Si_(3)O_(16).nH_(2)O, (Na_(x)K_((1-x)))_(4)Ti_(4)Si_(3)O_(16).nH_(2)O and K_(4)Ti_(4)Si_(3)O_(16).nH_(2)O wherein x represents a number of more than 0 and less than 1 and n represents a number of 0 to 8; and at least one selected from titanate salts represented by Na_(4)Ti_(9)O_(20).mH_(2)O, (Na_(y)K_((1-y)))_(4)Ti_(9)O_(20).mH_(2)O and K_(4)Ti_(9)O_(20).mH_(2)O wherein y represents a number of more than 0 and less than 1 and m represents a number of 0 to 10. The adsorbent material is suitably produced by a method for producing a crystalline silicotitanate in which a silicic acid source, a sodium compound and/or a potassium compound, titanium tetrachloride, and water are mixed to obtain a mixed gel, and the mixed gel is subjected to a hydrothermal reaction.


Patent
Nippon Chemical Industrial Co. | Date: 2016-11-30

There are provided an adsorbent material excellent in the adsorptive removal properties of Cs and Sr also in seawater, and a method for producing a crystalline silicotitanate suitable for the adsorbent material. The adsorbent material according to the present invention comprises: at least one selected from crystalline silicotitanates represented by Na_(4)Ti_(4)Si_(3)O_(16)nH_(2)O, (Na_(x)K_((1-x))4Ti_(4)Si_(3)O_(16)nH_(2)O and K_(4)Ti_(4)Si_(3)O_(16)nH_(2)O wherein x represents a number of more than 0 and less than 1 and n represents a number of 0 to 8; and at least one selected from titanate salts represented by Na_(4)Ti_(9)O_(20)mH_(2)O, (Na_(y)K_((1-y)))_(4)Ti_(9)O_(20)mH_(2)O and K_(4)Ti_(9)O_(20)mH_(2)O wherein y represents a number of more than 0 and less than 1 and m represents a number of 0 to 10. The adsorbent material is suitably produced by a method for producing a crystalline silicotitanate in which a silicic acid source, a sodium compound and/or a potassium compound, titanium tetrachloride, and water are mixed to obtain a mixed gel, and the mixed gel is subjected to a hydrothermal reaction.

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