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1. 发明专利

JPH08229400A EXHAUST GAS PURIFYING CATALYST 失效
公开(公告)号：JPH08229400A
公开(公告)日：1996-09-10
申请号：JP3550795
申请日：1995-02-23
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： TSUJI RYUSUKE , HAYAKAWA YOSHIO , SUZUKI KENICHIRO , UENO HIDEAKI , MIZUNO TATSUJI , HIRABAYASHI TAKESHI
IPC分类号： B01D53/86 , B01D53/94 , B01J23/89
摘要： PURPOSE: To provide a selective reduction-type NOx catalyst using light oil as a reducing agent and capable of efficiently purifying NOx at 200-400 deg.C. CONSTITUTION: The NOx in an oxygen-excess exhaust gas are reduced and purified by this exhaust gas purifying catalyst, and the catalyst consists of a mordenite-structure zeolite carrier and a transition metal element and noble metal deposited on the carrier. This carrier has elliptic pores, the main pores are unidirectionally extended parallel, and the carrier has an appropriate acid point. Such hydrocarbons as light oil are easily adsorbed in the pore, the noble metal is dispersed and deposited on the acid point, and the catalysis of the noble metal is enhanced. The deterioration of the carrier is suppressed by the transition metal element, the activation of the noble metal with oxygen is controlled, and the overburning of the light oil as the reducing agent is suppressed. Consequently, the temp. to start purifying NOx is kept low, and the temp. range of the inlet gas with the NOx reduced and purified is widened.

2. 发明专利

JPH08196869A CATALYST FOR PURIFICATION OF EXHAUST GAS 失效
公开(公告)号：JPH08196869A
公开(公告)日：1996-08-06
申请号：JP1080795
申请日：1995-01-26
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： TSUJI RYUSUKE , HAYAKAWA YOSHIO , SUZUKI KENICHIRO , UENO HIDEAKI , MIZUNO TATSUJI
IPC分类号： B01D53/86 , B01D53/94 , B01J29/22 , F02B3/06
摘要： PURPOSE: To efficiently remove NOX in exhaust gas contg. excess oxygen from a diesel engine, etc., over a wide temp. range by using a catalyst consisting of a mordenite type zeolite carrier and Y, etc., and a noble metal carried on the carrier in combination with a reducing agent made of hydrocarbon. CONSTITUTION: A catalyst consisting of a mordenite type zeolite carrier and at least one of Y and La and a noble metal such as Pt carried on the carrier is used in combination with a reducing agent made of hydrocarbon such as light oil. The hydrocarbon such as light oil is adsorbed on the carrier and activated. Since the dispersibility of the noble metal is improved by a porous structure peculiar to the carrier and a moderate acidity, light oil is activated even at a low temp. and an NOX removal reaction is allowed to proceed. At least one of Y and La suppresses the sintering of Pt at the time when thermal load is applied to the catalyst.

3. 发明专利

JP2002191988A CATALYST FOR CLEANING EXHAUST GAS 失效
公开(公告)号：JP2002191988A
公开(公告)日：2002-07-10
申请号：JP2000392666
申请日：2000-12-25
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： SAIKI MOTOHISA , MATSUNAGA SHINICHI , TSUJI RYUSUKE , HACHISUGA ICHIRO , SENDA KOJI
IPC分类号： F01N3/08 , B01D53/94 , B01J23/58 , B01J35/10 , F01N3/18 , F01N3/20 , F01N3/24 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To efficiently reduce and clean occluded NOx by short-time rich spiking. SOLUTION: The pores of a coat layer are formed so that pores with a pore size of 0.1-20 μm occupy 60% or more of the whole pore volume and pores with a pore size of 10-20 μm occupy 20% or more of the whole pore volume. The pore size of the pores of the coat layer become 10-2,000 times as compared with a conventional coat layer and the diffusion speed of gas through the pores also becomes 10-2,000 times. Therefore, exhaust gas can reach the interior of the coat layer even by short-time rich spiking. Since a noble metal chemical solution is infiltrated into the pores, a noble metal can be supported on the coat layer up to the interior thereof.

4. 发明专利

JPH0871371A PURIFICATION OF EXHAUST GAS 失效
公开(公告)号：JPH0871371A
公开(公告)日：1996-03-19
申请号：JP21011694
申请日：1994-09-02
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： UENO HIDEAKI , MIZUNO TATSUJI , HIRABAYASHI TAKESHI , TSUJI RYUSUKE , HAYAKAWA YOSHIO
IPC分类号： B01D53/86 , B01D53/94 , B01J23/42 , B01J29/12 , B01J29/22 , B01J29/44 , B01J29/74
摘要： PURPOSE: To further efficiently purify NOx in oxygen excessive exhaust gas. CONSTITUTION: A catalyst prepared by supporting a catalytic noble metal on Y-type zeolite or mordenite is arranged in a passage of oxygen excessive exhaust gas and exhaust gas is brought into contact with the catalyst while paraffinic HC is added to the exhaust gas to reduce and purify NOx contained in the exhaust gas. Since the pore size of Y-type zeolite or mordenite is relatively large as compared with that of other zeolite, Y-type zeolite or mordenite is considered to be excellent in the adsorbability of paraffinic HC having a high mol.wt. and shows high NOx purifying capacity.

5. 发明专利

JPS63108083A COATING MATERIAL COMPOSITION 失效
公开(公告)号：JPS63108083A
公开(公告)日：1988-05-12
申请号：JP6165587
申请日：1987-03-16
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： HORII MITSUMASA , SUZUKI TAKATOSHI , HAYASHI HIROAKI , SUGIURA MASAHIRO , TSUJI RYUSUKE , AKIMOTO MASAHARU
IPC分类号： C08K3/10 , C08K3/34 , C09D5/00 , C09D7/12
摘要： PURPOSE:To form a coating material composition having excellent odor absorptivity, by mixing a paint binder and a hydrated magnesium silicate clay mineral in a specified ratio. CONSTITUTION:A coating material composition formed by mixing 100pts.wt. (solids) paint binder and 50pts.wt. hydrated magnesium silicate clay mineral. Examples of the clay mineral include sepiolite and palygorskite. As the paint binder, a cement, a polymer cement or a polymer latex can be used. The clay mineral may be powdery, granular or laminar, is preferably ground to such an extent that the holes thereof still remain, and preferably comprises aggregates of fine crystals having a length of 10mum or less and an aspect ratio of 100 or less.

6. 发明专利

JPH08229356A EXHAUST GAS PURIFYING DEVICE 失效
公开(公告)号：JPH08229356A
公开(公告)日：1996-09-10
申请号：JP6691095
申请日：1995-03-01
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： HIRABAYASHI TAKESHI , UENO HIDEAKI , MIZUNO TATSUJI , TSUJI RYUSUKE , HAYAKAWA YOSHIO
IPC分类号： B01D53/86 , B01D53/94 , B01J29/44 , F02B3/06
摘要： PURPOSE: To obtain an exhaust gas purifying device capable of widening the range of purification activating temp. for nitrogen oxide and improved in purifying capacity by increasing or decreasing the quantity of a reducing agent to be added in accordance with one of exhaust gas temp. or catalyst bed temp. CONSTITUTION: A monolithic catalyst converter 3 is disposed in the halfway of an exhaust gas path 2 of a Diesel engine 1. A temp. sensor 5 for detecting the temp. of the flowing-in exhaust gas or catalyst bed is set in the converter 3 and a reducing agent feed device 6 is formed at the upper stream side than the catalyst converter 3 in the exhaust gas path 2. And a feed controlling device 7 is mounted in the reducing agent feed device 6 and the quantity of the reducing agent is increased or decreased in accordance with the temp. detected by the temp. sensor 5. The quantity of the reducing agent to be fed is controlled to be decreased with the increase of the detected temp.

7. 发明专利

JPH06100319A MULTIPLE OXIDE WITH PEROVSKITE STRUCTURE AND ITS PRODUCTION 失效
公开(公告)号：JPH06100319A
公开(公告)日：1994-04-12
申请号：JP27501992
申请日：1992-09-18
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： TSUJI RYUSUKE , SAKANO KOJI , SUGIURA MASAHIRO , UENO HIDEAKI , MIZUNO TATSUJI
IPC分类号： B01J23/89 , C01B13/18 , C01G55/00
摘要： PURPOSE:To provide the subject multiple oxide high in catalytic activity and adsorptive activity etc. CONSTITUTION:The objective multiple oxide with perovskite structure of formula M M 1-XM O3 (M is La, Sr, Ce, Ba or Ca; M is Co or Fe; M is Pt or Pd; 0.005 =350 deg.C into a preliminarily baked form, which is then baked in an oxidative atmosphere, thus affording the objective multiple oxide where >=90wt.% of the M metal (Pt or Pd) exist in the crystal lattice.

8. 发明专利

JPH09103651A METHOD AND APPARATUS FOR PURIFYING EXHAUST GAS 失效
公开(公告)号：JPH09103651A
公开(公告)日：1997-04-22
申请号：JP26326095
申请日：1995-10-11
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： HATANAKA YOSHIO , TSUJI RYUSUKE , KURACHI SAEKO , HIRABAYASHI TAKESHI
IPC分类号： B01D53/86 , B01D53/94 , B01J23/42
摘要： PROBLEM TO BE SOLVED: To expand a temperature range in which a high nitrogen oxide purification rate is obtained and to control the generation of sulfate by making the average particle size of noble metal particles supported on the inlet side smaller than that of noble metal particles supported on the outlet side of a catalyst. SOLUTION: A monolithic catalyst converter 3 is installed in the exhaust gas route 2 of a diesel engine 1, and a reducing agent supply apparatus 4 which gasifies light oil to supply the gas into exhaust gas is installed on the upstream side. A monolithic catalyst converter 3 receives a monolithic catalyst in which a honeycomb support substrate is coated with a Pt catalyst with different average particle sizes. The average particle size of Pt of the monolithic catalyst is made to be two-stage support structure from the inlet side end surface in the exhaust gas flow direction to the middle and from the middle to the outlet side end surface. The Pt particles with a smaller average particle size than that of the particles on the outlet side are arranged on the inlet side, and the particles with a larger average particle size than that of the particles on the inlet side are arranged on the outlet side. In this way, NOx can be reduced and purified efficiently in a wide temperature range from low to high temperatures, and the generation of sulfate can be controlled.

9. 发明专利

JPH07116519A EXHAUST GAS PURIFYING MATERIAL AND PURIFYING METHOD OF EXHAUST GAS 失效
公开(公告)号：JPH07116519A
公开(公告)日：1995-05-09
申请号：JP28576393
申请日：1993-10-20
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： TSUJI RYUSUKE , HAYAKAWA YOSHIO , SUGIURA MASAHIRO , UENO HIDEAKI , MIZUNO TATSUJI
IPC分类号： B01D53/86 , B01D53/94 , B01J23/64 , B01J23/652 , B01J23/656 , B01J23/89
摘要： PURPOSE:To obtain an exhaust gas purifying material having sufficient adsorption sites for NOx and capable of efficiently purifying NOx by forming the purifying material from a porous filter and a catalyst supported on the surface of the filter having a perovskite structure expressed by a specific formula. CONSTITUTION:The exhaust gas purifying catalyst consists of the porous filter and the catalyst supported on the surface of the filter and having the perovskite structure, the chemical formula of which is expressed by the formula 1. In the formula, A is at least one kind of element selected from among lanthanum, strontium, cerium, barium or calcium, B is at least one kind of element selected from among cobalt, iron, nickel, chromium, manganese or magnesium, C is at least one kind element selected from between platinum and palladium and 0.05

10. 发明专利

JPH06304449A APPARATUS FOR REMOVING NITROGEN OXIDE 失效
公开(公告)号：JPH06304449A
公开(公告)日：1994-11-01
申请号：JP12052093
申请日：1993-04-23
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： TSUJI RYUSUKE , SUGIURA MASAHIRO , UENO HIDEAKI , MIZUNO TATSUJI
IPC分类号： B01D53/86 , B01D53/94 , B01J23/64 , B01J23/652 , B01J23/89 , B01D53/36
摘要： PURPOSE:To provide an apparatus for removing efficiently nitrogen oxide at low temp. CONSTITUTION:A catalyst layer 1 consisting of Pt or Pd is provided at the front stage of a flow path of a nitrogen oxide-contg. gas and a catalyst layer 2 consists of a substance of perovskite-type structure of AB'1-xC'O3 (wherein A is at least one among La, Sr, Ce, Ba and Ca; B' is at least one among Co, Fe, Ni, Cr, Mn and Mg; C' is at least one of Pt and Pd; (x) is 0.005

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