GB1392528A - Process for detoxicating exhaust gases from motor vehicles - Google Patents

Process for detoxicating exhaust gases from motor vehicles

Info

Publication number
GB1392528A
GB1392528A GB3605072A GB3605072A GB1392528A GB 1392528 A GB1392528 A GB 1392528A GB 3605072 A GB3605072 A GB 3605072A GB 3605072 A GB3605072 A GB 3605072A GB 1392528 A GB1392528 A GB 1392528A
Authority
GB
United Kingdom
Prior art keywords
bed
rhodium
iridium
calcined
palladium
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
GB3605072A
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.)
Kali Chemie AG
Original Assignee
Kali Chemie AG
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
Application filed by Kali Chemie AG filed Critical Kali Chemie AG
Publication of GB1392528A publication Critical patent/GB1392528A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • 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
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/44—Palladium
    • 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
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/46—Ruthenium, rhodium, osmium or iridium
    • B01J23/468—Iridium
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
    • D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
    • D06L4/24—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using chlorites or chlorine dioxide
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/50—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs by irradiation or ozonisation
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/03—Precipitation; Co-precipitation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

1392528 Treating exhaust gas KALICHEMIE AG 2 Aug 1972 [14 Aug 1971 27 Nov 1971] 36050/72 Heading F1B A process for purifying I.C. engine exhaust gases in a catalytic two-bed reactor comprises the steps of heating the first reactor bed by initially adding secondary air to the exhaust gases so that oxidizing conditions prevail in the first reactor bed and then diverting the secondary air to the second reactor bed so that reducing conditions prevail in the first bed and oxidizing conditions in the second bed, the first catalyst bed comprising a support which has been calcined at 1000 to 1500‹C and which contains, by weight, either 0.02 to 0.10% rhodium and 0.05 to 0.2% palladium or 0.005 to 0.05% of each of rhodium and iridium. The ratio of rhodium to iridium can vary between 1:10 and 10:1 and the ratio of rhodium to palladium can vary between 1:0.5 and 1:10. Catalyst support Moulded aluminium oxides optionally containing silica, or aluminosilicates. Honeycomb or corrugated ceramics e.g. cordierite, #-spodumene, mullite, α-alumina or combinations thereof, optionally coated with aluminium oxide. The support is calcined for 10-120 minutes at 1000-1500‹C and then impregnated with solutions of salts of rhodium and iridium or palladium, separately or mixed. The first bed catalyst is dried at 100-200‹C, calcined at 700-900‹C and then reduced in a hydrogen atmosphere at 400-600‹C or in an aqueous hydrazine hydrochloride solution. Artificial ageing in alternate oxidizing and reducing atmospheres for 200 hours at 800‹C showed that the catalysts did not lose their reduction properties.
GB3605072A 1971-08-13 1972-08-02 Process for detoxicating exhaust gases from motor vehicles Expired GB1392528A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2140645A DE2140645C3 (en) 1971-08-13 1971-08-13 Method of bleaching with Chlonten
DE2140852A DE2140852A1 (en) 1971-08-13 1971-08-14 PROCESS AND CATALYST FOR THE REDUCTION OF NITROGEN OXIDES IN CAR EXHAUST GASES
DE2158877A DE2158877A1 (en) 1971-08-13 1971-11-27 METHOD AND CATALYST FOR DETOXIFYING CAR EXHAUST GASES IN CATALYTIC TWO BED REACTORS

Publications (1)

Publication Number Publication Date
GB1392528A true GB1392528A (en) 1975-04-30

Family

ID=27183633

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3605072A Expired GB1392528A (en) 1971-08-13 1972-08-02 Process for detoxicating exhaust gases from motor vehicles
GB3757372A Expired GB1397595A (en) 1971-08-13 1972-08-11 Chlorite bleaching

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3757372A Expired GB1397595A (en) 1971-08-13 1972-08-11 Chlorite bleaching

Country Status (7)

Country Link
AU (1) AU465922B2 (en)
CA (1) CA996333A (en)
CH (2) CH562905A (en)
DE (3) DE2140645C3 (en)
FR (2) FR2149400B1 (en)
GB (2) GB1392528A (en)
NL (1) NL7209143A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390441A (en) 1980-04-11 1983-06-28 Lever Brothers Company Machine dishwashing composition
BR8102075A (en) * 1980-04-11 1981-10-13 Unilever Nv PROCESS FOR WASHING AND WHITING CLOTHES
US4332691A (en) 1980-04-11 1982-06-01 Lever Brothers Company Bleaching liquid cleaning composition
US4445901A (en) * 1981-10-09 1984-05-01 Lever Brothers Company Fabric conditioning composition
CA1295813C (en) * 1988-12-14 1992-02-18 Karl T. Chuang Reduction of nitrogen oxides
CA2044893C (en) * 1990-06-20 1998-11-03 Senshi Kasahara Transition metal-containing zeolite having high hydrothermal stability, production method thereof and method of using same

Also Published As

Publication number Publication date
DE2158877A1 (en) 1973-05-30
DE2140645A1 (en) 1973-03-01
GB1397595A (en) 1975-06-11
DE2140852A1 (en) 1973-02-15
NL7209143A (en) 1973-02-16
AU4536972A (en) 1974-02-14
DE2140645B2 (en) 1973-05-10
FR2149400B1 (en) 1976-07-23
CH562905A (en) 1975-06-13
CH1178272A4 (en) 1974-12-31
CA996333A (en) 1976-09-07
DE2140645C3 (en) 1973-12-13
AU465922B2 (en) 1975-10-09
FR2149440A1 (en) 1973-03-30
FR2149400A1 (en) 1973-03-30

Similar Documents

Publication Publication Date Title
US3896616A (en) Process and apparatus
US4738947A (en) Three-way catalysts of improved efficiency
US6044644A (en) Close coupled catalyst
EP1660217B1 (en) Catalyst arrangement and method of purifying the exhaust gas of internal combustion engines operated under lean conditions
EP0885657B1 (en) Catalyst composite
JP5526410B2 (en) Method for removing nitrogen oxides in exhaust gas
US5409671A (en) Catalytic converter for treating exhaust gas
US3545917A (en) Method of decomposing nitrogen oxides
GB1397572A (en) Method and apparatus for treating exhaust gases of internal combustion engines
KR890003437A (en) Catalyst for purification of exhaust gas of internal combustion engine with excellent heat resistance and method for producing same
EP0993861B1 (en) Catalyst for purifying exhaust gas from lean-burn engine
US4076792A (en) Catalyst systems for the reduction of the oxides of nitrogen
US6245307B1 (en) Catalyst for purifying exhaust gas from lean burn engine and method for purification
EP0428752A4 (en) Exhaust gas purifying catalyst excellent in thermal resistance and method of production thereof
WO1997023278A1 (en) Engine exhaust treatment apparatus and method of use
EP3722571B1 (en) Novel three-zone two-layer twc catalyst in gasoline waste gas applications
CA1183118A (en) Exhaust gas purification catalyst
EP0562516A1 (en) Catalyst and method for purifying exhaust gas
US4171289A (en) Selective automotive exhaust catalysts and a process for their preparation
CN110732320B (en) Diesel engine tail gas oxidation catalyst and preparation method and application thereof
US3983072A (en) Exhaust catalyst
GB1392528A (en) Process for detoxicating exhaust gases from motor vehicles
CN109794239B (en) Preparation method of single noble metal layer three-way catalyst
US4020013A (en) Catalytic composite for treating exhaust gases from an internal combustion engine
US3674423A (en) Catalyst for nitrogen oxide reduction

Legal Events

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