GB979119A - Catalysts for the oxidation of exhaust gases - Google Patents

Catalysts for the oxidation of exhaust gases

Info

Publication number
GB979119A
GB979119A GB2048163A GB2048163A GB979119A GB 979119 A GB979119 A GB 979119A GB 2048163 A GB2048163 A GB 2048163A GB 2048163 A GB2048163 A GB 2048163A GB 979119 A GB979119 A GB 979119A
Authority
GB
United Kingdom
Prior art keywords
organic complexing
zro2
al2o3
complexing agent
support
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
GB2048163A
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.)
WR Grace and Co
Original Assignee
WR Grace and Co
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 WR Grace and Co filed Critical WR Grace and Co
Publication of GB979119A publication Critical patent/GB979119A/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
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • 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

Abstract

Oxidation catalysts are made by impregnating supports having a surface area above 100 sq.m./gm. with a solution of a copper salt and a manganese salt and an organic complexing agent in amounts such that the final catalyst contains 2-20% CuO, 2-30% MnO2 and 1-10% of organic complexing agent, and heating the impregnated support until an active catalyst is formed. Examples of organic complexing agents are hydroxy acids, polyhydroxy acids, alcohols and polyalcohols. In lieu of an organic complexing agent (NH4)2(CO3 may be used. The support may be Al2O3, SiO2/Al2O3, SiO2/MgO, ZrO2, Al2O3/ZrO2, ZrO2/MgO or an acid treated clay; a - and g -aluminas are especially suitable. Additionally the support may contain 0,001-0,5% Pd. Heating usually involves drying at 49-127 DEG C. for 4-48 hours in air or steam and calcining at 540-760 DEG C. for 1-16 hours. Comparative examples are given.
GB2048163A 1962-08-29 1963-05-22 Catalysts for the oxidation of exhaust gases Expired GB979119A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22016262A 1962-08-29 1962-08-29

Publications (1)

Publication Number Publication Date
GB979119A true GB979119A (en) 1965-01-01

Family

ID=22822328

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2048163A Expired GB979119A (en) 1962-08-29 1963-05-22 Catalysts for the oxidation of exhaust gases

Country Status (1)

Country Link
GB (1) GB979119A (en)

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