Patents Assigned to Sakai Chemical Industry Co. Ltd.
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Patent number: 6592645Abstract: A process for the production of fine powder of metallic nickel which comprises a first step of dissolving nickel carbonate and/or nickel hydroxide in aqueous ammonia or in an aqueous solution of ammonia and at least one selected from the group consisting of ammonium carbonate, ammonium hydrogencarbonate, a carbonate of an alkali metal and a hydrogencarbonate of an alkali metal to prepare an aqueous solution of a nickel salt; converting the aqueous solution of a nickel salt to a W/O emulsion, and then removing volatile components including ammonia from the droplets to form precipitates of nickel carbonate in the droplets, thereby providing fine spherical particles of nickel carbonate; and a second step of heating the particles of nickel carbonate in the presence of a fusion preventive agent that is a compound of at least one element selected from the group consisting of alkaline earth elements, aluminum, silicon and rare earth elements in an atmosphere of hydrogen, thereby reducing the nickel carbonate to metaType: GrantFiled: July 18, 2001Date of Patent: July 15, 2003Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Hideto Mizutani, Minoru Yoneda, Toshihiro Sugaya, Hiroyoshi Urasumi, Chiyo Honda, Hiroshi Nakao, Tsutomu Hatanaka, Shinji Ohgama, Kiyoshi Fukai, Kazuhiko Nagano, Shigefumi Kamisaka, Kazunobu Abe
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Patent number: 6306787Abstract: The invention provides nickel hydroxide secondary particles comprising agglomerates of primary particles of nickel hydroxide in the shape of a triangular prism or a triangular plate having a surface or a outer face in the form of a substantially equilateral triangle each side of which substantially equilateral triangle has a length of 1 to 10 &mgr;m. The invention further provides lithium nickel composite oxide secondary particles comprised of agglomerates of primary particles having a large particle diameter by mixing the nickel hydroxide secondary particles with a lithium compound and sintering the resulting mixture at a temperature of 600° C. to 1000° C. in an oxidative atmosphere.Type: GrantFiled: April 26, 2000Date of Patent: October 23, 2001Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Shigeki Sato, Yasuo Araki, Masami Nakayama, Shoichi Tamura
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Patent number: 6197273Abstract: The invention provides a process for production of fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper which comprises: dissolving a carbonate or a hydroxide of nickel, cobalt or copper having the general formula (I) M(CO3)x/2.(OH)y wherein M represents Ni, Co or Cu, and x and y are numerals satisfying the followings: 0≦x≦2, 0≦y≦2 and x+y=2, in aqueous ammonia, converting the resulting solution to a W/O emulsion containing droplets of the solution in a non-aqueous medium, and then removing volatile components including ammonia from within the droplets, thereby precipitating a basic carbonate or a hydroxide of a metal selected from nickel, cobalt and copperin the droplets.Type: GrantFiled: March 22, 2000Date of Patent: March 6, 2001Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Kazuhiko Nagano, Kazunobu Abe, Shigefumi Kamisaka, Kiyoshi Fukai, Tsutomu Hatanaka, Shinji Ohgama, Hiroshi Nakao, Minoru Yoneda, Hideto Mizutani
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Patent number: 6113873Abstract: To hydrous titanium dioxide obtained by hydrolysis of titanium sulfate was added a predetermined amount of a water-soluble aluminum compound and/or a water-soluble zinc compound, the mixture is calcined, and a suitable amount of aluminum and/or zinc is introduced into the crystals to make up the crystal defects of anatase-type titanium dioxide, so that it has increased stability and excellent color stability.Type: GrantFiled: July 29, 1998Date of Patent: September 5, 2000Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Makoto Tunashima, Kazuyoshi Muraoka, Kohji Yamamoto, Masaru Mikami, Suzuo Sasaki
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Patent number: 6045765Abstract: The invention provides a catalyst for catalytic reduction of nitrogen oxides which uses a hydrocarbon or an oxygen-containing organic compound as a reducing agent, which comprises silver aluminate supported on a solid acid carrier material. The invention also provides a catalyst which comprises silver aluminate and at least one transition element selected from the group consisting of W, Mo and V, each supported on a solid acid carrier material. The invention further provides a method for producing such catalysts and a method for catalytic reduction of nitrogen oxides by use of such catalysts as above mentioned.Type: GrantFiled: February 7, 1997Date of Patent: April 4, 2000Assignees: Sakai Chemical Industry Co., Ltd., Petroleum Energy CenterInventors: Tadao Nakatsuji, Ritsu Yasukawa, Keiichi Tabata, Kazuyuki Ueda
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Patent number: 5976511Abstract: The invention provides an ultraviolet rays-absorbing composition having a pearly luster which comprises plate barium sulfate particles having a surface coated with at least one of zinc oxide, cerium oxide and titanium oxide and a process for preparing the same. The composition has a pearly luster of stable quality, satisfactory translucence, and a satisfactory feel.Type: GrantFiled: December 11, 1997Date of Patent: November 2, 1999Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Koichi Ohtsu, Noriaki Sato
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Patent number: 5858079Abstract: The present invention provides a strontium borate pigment composition comprising particles of a strontium borate represented by the general formula (1):.alpha.SrO..beta.B.sub.2 O.sub.3..gamma.H.sub.2 O (1)(wherein O<.alpha..ltoreq.3, O<.beta..ltoreq.4, O.ltoreq..gamma..ltoreq.5), the particles being coated with at least one compound selected from the group consisting of compounds represented by the formulae (2) to (6):.delta.SrO..epsilon.SiO.sub.2..zeta.H.sub.2 O (2)(wherein O<.delta..ltoreq.3, O<.epsilon..ltoreq.2, O.ltoreq..zeta..ltoreq.4 ).eta.SrO..theta.Al.sub.2 O.sub.3..iota.H.sub.2 O (3)(wherein O<.eta..ltoreq.5, O<.theta..ltoreq.16, O.ltoreq..iota..ltoreq.6)SrSO.sub.4 (4)SrCO.sub.3 (5)andSrHPO.sub.4 (6),the pigment composition having an average particle diameter of 0.1 .mu.m to 5 .mu.Type: GrantFiled: March 25, 1997Date of Patent: January 12, 1999Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Koichi Ohtsu, Taizo Kaihatsu
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Patent number: 5853679Abstract: A process for removing nitrogen oxide from exhaust is disclosed, comprising contacting exhaust containing nitrogen oxide with an alumina catalyst which contains not more than 0.5% by weight of an alkali metal and/or an alkaline earth metal and has a total pore volume of from 0.48 to 1.2 cm.sup.3 .multidot.g.sup.-1 with 0.26 to 0.6 cm.sup.3 .multidot.g.sup.-1 of the total pore volume being formed of pores of not greater than 80 .ANG. or has a volume of pores formed of pores of not greater than 60 .ANG. of from 0.06 to 0.2 cm.sup.3 .multidot.g.sup.-l and which may have supported thereon tin in an oxidative atmosphere containing excess oxygen in the presence of a hydrocarbon or an oxygen-containing organic compound.Type: GrantFiled: October 17, 1996Date of Patent: December 29, 1998Assignees: Japan as Represented by Director General of Agency of Industrial Science and Technology, Petroleum Energy Center, Cosmo Oil Co., Ltd., Sakai Chemical Industry Co., Ltd.Inventors: Mitsunori Tabata, Masaaki Kawatsuki, Katsumi Miyamoto, Hiroshi Tsuchida, Tomohiro Yoshinari, Kazushi Usui, Fujio Suganuma, Tadao Nakatsuji, Hiromitsu Shimizu, Ritsu Yasukawa, Hideaki Hamada, Takehiko Ito, Yoshiaki Kintaichi, Motoi Sasaki
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Patent number: 5733837Abstract: A catalyst for catalytic reduction of nitrogen oxides using a hydrocarbon and/or a oxygen-containing organic compound as a reducing agent is disclosed, which comprises a cerium oxide supported on a solid acid carrier.Also, a catalyst for catalytic reduction of nitrogen oxides using a hydrocarbon and/or an oxygen-containing organic compound as a reducing agent is disclosed, which comprises:(a) at least one element selected from the elements of Group Ib, Group IIa, Group IIb, Group IIIa, Group IIIb, Group IVa, Group IVb, Group Va, Group VIa, Group VIIa, and Group VIII in the Periodic Table (hereinafter referred to as the elements belonging to group (a)); and(b) a cerium oxide, supported on a solid acid carrier.Type: GrantFiled: April 5, 1996Date of Patent: March 31, 1998Assignees: Sakai Chemical Industry Co., Ltd., Petroleum Energy Center, Cosmo Oil Co., Ltd.Inventors: Tadao Nakatsuji, Hiromitsu Shimizu, Ritsu Yasukawa, Katsumi Miyamoto, Hiroshi Tsuchida
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Patent number: 5585059Abstract: There is disclosed water soluble algin fibers and such fibers which have antibiotics immobilized thereto. The water soluble algin fibers are produced by extruding an aqueous dope which contains water soluble algin therein into a large quantity of a hydrophilic organic solvent exemplified by acetone. The water soluble algin fibers which have antibiotics immobilized thereto are produced in the same manner by using a dope containing antibiotics.Type: GrantFiled: October 26, 1993Date of Patent: December 17, 1996Assignees: Sakai Chemical Industry Co., Ltd., Agency of Industrial Science and TechnologyInventors: Yoshinari Kobayashi, Hiroshi Kamishima, Satoshi Fukuoka, Hideki Obika, Tsutomu Asaoka, Keishi Tenma
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Patent number: 5582809Abstract: A catalyst for reducing nitrogen oxides into nitrogen and water in the presence of a reducing agent, which comprises:(a) titanium;(b) at least one element selected from the group consisting of tungsten and molybdenum in a total amount of 10-25% by weight in terms of oxides; and(c) niobium in an amount of 0.1-2% by weight in terms of oxides.Type: GrantFiled: July 19, 1994Date of Patent: December 10, 1996Assignees: Sakai Chemical Industry Co., Ltd., Mitsubishi Jukogyo Kabushiki KaishaInventors: Hiroaki Rikimaru, Toshikatsu Umaba, Yoshiyuki Yoshikawa
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Patent number: 5580377Abstract: A plate barium sulfate is described, which has a particle size of from 1 to 100 .mu.m or from 5 to 150 .mu.m, wherein neither a sulfide nor a soluble barium salt is detected by an analysis method based on the Japanese Cosmetics Material Standard. The process of the plate barium sulfate is also described.Type: GrantFiled: June 7, 1995Date of Patent: December 3, 1996Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Koichi Ohtsu, Hirobumi Yoshida, Noriaki Sato
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Patent number: 5569445Abstract: Disclosed herein is fine acicular .alpha.-ferric oxide which has the crystallite diameter (D.sub.1014) in the direction perpendicular to the (1014) plane and the crystallite diameter (D.sub.1120) in the direction perpendicular to the (1120) plane such that their ratio D.sub.1014 /D.sub.1120 is in the range of 1-2, and also has a specific surface area of 40-50 m.sup.2 g. Disclosed also herein is fine acicular .alpha.-ferric oxide which has the crystallite diameter (D.sub.1014) in the direction perpendicular to the (1014) plane and the crystallite diameter (D.sub.1120) in the direction perpendicular to the (1120) plane such that their ratio D.sub.1014 /D.sub.1120 is the range of 1-2, and also has an average aspect ratio of 10-15 and a specific surface area of 20-40 m.sup.2 /g. They are produced by wet process including the step of hydrothermal reaction.Type: GrantFiled: December 29, 1994Date of Patent: October 29, 1996Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Yoshiki Fukatsu, Shinji Nakahara, Youichi Yamada, Hideji Yamamoto, Tatsuya Hida, Mizuho Wada
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Patent number: 5507898Abstract: A multilayer piezoelectric composite comprising a bonded laminate each layer of which is composed of a green sheet of a low-temperature sintering lead zirconate titanate piezoelectric ceramic. The temperature coefficient of a frequency constant of at least one layer has a polarity opposite to the polarity of those of the other layers. The bonded laminate is sintered at a temperature which does not produce any or almost any interdiffusion between layers so that the absolute value of the temperature coefficient of a frequency constant of the bonded laminate is smaller than the absolute value of the temperature coefficient of a frequency constant of any or one of the layers.Type: GrantFiled: September 26, 1994Date of Patent: April 16, 1996Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Masashi Aoki, Kiyoshi Fukai, Kazunobu Abe, Koichiro Sakata, Tadashi Takenaka
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Patent number: 5474781Abstract: There is disclosed water soluble algin fibers and such fibers which have antibiotics immobilized thereto. The water soluble algin fibers are produced by extruding an aqueous dope which contains water soluble algin therein into a large quantity of a hydrophilic organic nonsolvent exemplified by acetone. The water soluble algin fibers which have antibiotics immobilized thereto are produced in the same manner by using a dope containing antibiotics.Type: GrantFiled: January 22, 1991Date of Patent: December 12, 1995Assignees: Sakai Chemical Industry Co., Ltd., Agency of Industrial Science & TechnologyInventors: Yoshinari Kobayashi, Hiroshi Kamishima, Satoshi Fukuoka, Hideki Obika, Tsutomu Asaoka, Keishi Tenma
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Patent number: 5474965Abstract: A novel catalyst for catalytic reduction of nitrogen oxide using a hydrocarbon as a reducing agent is provided, which comprises (a) at least an element of the platinum group selected from the group consisting of platinum, iridium, rhodium and ruthenium and (b) gold, and which may further comprises (c) at least a metallic oxide selected from the group consisting of cerium oxide, lanthanum oxide, neodymium oxide, germanium oxide and gallium oxide.Type: GrantFiled: December 13, 1993Date of Patent: December 12, 1995Assignees: Sakai Chemical Industry Co., Ltd., Petroleum Energy Center, Cosmo Oil Co., Ltd., Agency of Industrial Science and TechnologyInventors: Tadao Nakatsuji, Hiromitsu Shimizu, Ritsu Yasukawa, Masaaki Kawatsuki, Mitsunori Tabata, Hiroshi Tsuchida, Yoshiaki Kintaichi, Motoi Sasaki
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Patent number: 5380692Abstract: A catalyst for catalytic reduction of nitrogen oxide using at least one reducing agent selected from the group consisting of a hydrocarbon and an oxygen-containing organic compound is described, which includes an oxide represented by formula (V):A.sup.5.sub.x B.sup.3.sub.3-x C.sup.4.sub.3 O.sub.7 (V)wherein A.sup.5 represents at least one element selected from the group consisting of La, Y, Ce, Pr, Nd, Sm, Eu, and Gd; B.sup.3 represents at least one element selected from the group consisting of Ba, Sr, Ca, Mg, Pb, Zn, and Ag; C.sup.4 represents at least one element selected from the group consisting of Mn, Co, Fe, Ni, Cr, Cu, V, Mo, W, Ti, Zr, Nb, Pd, Rh, Ru, and Pt; and x is a number of from 0 to 1, supported on a solid acid carrier.Type: GrantFiled: September 11, 1992Date of Patent: January 10, 1995Assignees: Sakai Chemical Industry Co., Ltd., Agency of Industrial Science and Technology, Petroleum Energy Center, Cosmo Oil Co., Ltd.Inventors: Tadao Nakatsuji, Hiromitsu Shimizu, Ritsu Yasukawa, Fujio Suganuma, Akihiro Kitazume, Hiroshi Tsuchida, Takehiko Ito, Hideaki Hamada, Katsumi Miyamoto, Masaaki Kawatsuki, Yoshiaki Kintaichi, Motoi Sasaki, Mitsunori Tabata
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Patent number: 5336651Abstract: A TiO.sub.2 containing catalyst for denitrizing nitrogen oxides in the presence of a hydrocarbon as a reducing agent is disclosed. There are also disclosed denitrizing catalysts which contain zeolite or perovskite structure complex compound.Type: GrantFiled: June 30, 1993Date of Patent: August 9, 1994Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Masafumi Yoshimoto, Tadao Nakatsuji, Hiromitsu Shimizu
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Patent number: 5334760Abstract: A phosphine derivative of the following general formula ( I ): ##STR1## (wherein R.sup.1 is an alkyl group having 1 to 18 carbon atoms or an aryl group having 6 to 18 carbon atoms, and the aryl group may have an alkyl group having 1 to 18 carbon atoms or an alkenyl group having 2 to 18 carbon atoms) is reacted with acrylic acid or methacrylic acid in the presence of a catalyst selected from the group consisting of an organic peroxide and an azo-compound, and the resulting reaction product is hydrolyzed with water, thereby to obtain a phosphinyl-carboxylic acid derivative of the following general formula (III): ##STR2## (wherein R.sup.1 is as defined above, and R.sup.2 is a hydrogen atom or a methyl group). Based on the reaction above-mentioned, ester of free acid and a cyclic acid anhydride can also be obtained. Accordingly, the target compound can be obtained at a relatively low reaction temperature in a short period of time with high yield.Type: GrantFiled: August 7, 1992Date of Patent: August 2, 1994Assignee: Sakai Chemical Industry Co., Ltd.Inventors: Toshio Wachi, Yutaka Sakaguchi, Kotaro Fujita
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Patent number: 5275878Abstract: A composite dielectric is formed with a matrix synthetic resin and particulate porous, inorganic dielectric dispersed in the matrix synthetic resin. The dielectric constant of this composite dielectric can be thereby elevated effectively without enlarging the dissipation factor (tan .delta.) of the composite dielectric.Type: GrantFiled: January 31, 1991Date of Patent: January 4, 1994Assignees: Matsushita Electric Works, Ltd., Sakai Chemical Industry Co., Ltd.Inventors: Seishiro Yamakawa, Michimasa Tsuzaki, Kiyotaka Komori, Satoshi Fujiki, Akiyoshi Nozue, Kazunobu Abe, Masashi Aoki