GB1473951A - Improvements in or relating to catalysts for exhaust gas treatment - Google Patents

Improvements in or relating to catalysts for exhaust gas treatment

Info

Publication number
GB1473951A
GB1473951A GB2371174A GB2371174A GB1473951A GB 1473951 A GB1473951 A GB 1473951A GB 2371174 A GB2371174 A GB 2371174A GB 2371174 A GB2371174 A GB 2371174A GB 1473951 A GB1473951 A GB 1473951A
Authority
GB
United Kingdom
Prior art keywords
catalyst
catalysts
exhaust gases
treatment
exhaust gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2371174A
Inventor
Joseph Peter Remeika
Rudolph Johannes H Voorhoeve
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US375948A external-priority patent/US3884837A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1473951A publication Critical patent/GB1473951A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/32—Manganese, technetium or rhenium
    • B01J23/34—Manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/656—Manganese, technetium or rhenium
    • B01J23/6562—Manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/889—Manganese, technetium or rhenium
    • B01J23/8892—Manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/8986—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with manganese, technetium or rhenium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

1473951 Exhaust gas catalysts WESTERN ELECTRIC CO INC 29 May 1974 [29 May 1973 2 July 1973] 23711/74 Heading BIE [Also in Division Cl] A catalyst compositions for treatment of I.C. engine exhaust gases is a perovskite-like manganite of formula wherein RE = a rare earth metal selected from La, Pr and Nd, M is at least one of Na, K, Rb and Cs, x is 0.1 to 0.4 and in which the amount of any cation may be reduced by up to 15 atom percent to accommodate vacancy structures. The catalyst may be supported, e.g. on alumina. The catalyst may be used as the sole catalyst of a single stage treatment of the exhaust gases or in both stages of a sequential reduction then oxidation treatment of the exhaust gases or it may be used in the reduction stage only, the subsequent oxidation stage using a different catalyst, e.g. a perovskite-like manganite of formula wherein RE = La, Pr and/or Nd, M = Pb, Ca, Sr, Ba and/or one or more elements which occupy dodecahedral sites as partial replacement of RE as monovalent ions, x is from 0.05 to 0.7, y is from 0 to 0.15 and z is 0 to 0.15 (but y and/or z is at least 0.005). The catalysts may be acid etched to improve activity.
GB2371174A 1973-05-29 1974-05-29 Improvements in or relating to catalysts for exhaust gas treatment Expired GB1473951A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36426073A 1973-05-29 1973-05-29
US375948A US3884837A (en) 1973-07-02 1973-07-02 Catalyst containing a perovskite-like manganite

Publications (1)

Publication Number Publication Date
GB1473951A true GB1473951A (en) 1977-05-18

Family

ID=27002388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2371174A Expired GB1473951A (en) 1973-05-29 1974-05-29 Improvements in or relating to catalysts for exhaust gas treatment

Country Status (7)

Country Link
JP (1) JPS5439277B2 (en)
DE (1) DE2425343B2 (en)
FR (1) FR2231424B1 (en)
GB (1) GB1473951A (en)
IT (1) IT1014234B (en)
NL (1) NL7407129A (en)
SE (1) SE7406976L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236493A (en) * 1989-10-03 1991-04-10 Riken Kk Exhaust gas purification catalyst
CN112076757A (en) * 2020-10-02 2020-12-15 武汉纺织大学 Porous LaCoO prepared by acetic acid etching3Process for perovskite catalysts

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5092880A (en) * 1973-12-20 1975-07-24
JPS5187187A (en) * 1975-01-30 1976-07-30 Nissan Motor
CN1004992B (en) * 1986-07-30 1989-08-16 北京工业大学 Rare-earth catalyzer using alloy cellular carrier and its preparation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852691A (en) * 1971-10-19 1973-07-24

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236493A (en) * 1989-10-03 1991-04-10 Riken Kk Exhaust gas purification catalyst
CN112076757A (en) * 2020-10-02 2020-12-15 武汉纺织大学 Porous LaCoO prepared by acetic acid etching3Process for perovskite catalysts

Also Published As

Publication number Publication date
JPS5439277B2 (en) 1979-11-27
IT1014234B (en) 1977-04-20
FR2231424B1 (en) 1976-12-24
SE7406976L (en) 1974-12-02
DE2425343C3 (en) 1979-06-13
FR2231424A1 (en) 1974-12-27
DE2425343A1 (en) 1975-01-02
DE2425343B2 (en) 1978-10-26
NL7407129A (en) 1974-12-03
JPS5027793A (en) 1975-03-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee