GB808731A - Preparation of platinum metal catalysts - Google Patents

Preparation of platinum metal catalysts

Info

Publication number
GB808731A
GB808731A GB206156A GB206156A GB808731A GB 808731 A GB808731 A GB 808731A GB 206156 A GB206156 A GB 206156A GB 206156 A GB206156 A GB 206156A GB 808731 A GB808731 A GB 808731A
Authority
GB
United Kingdom
Prior art keywords
hydrogen peroxide
aqueous solution
alumina
aqueous
sodium
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
GB206156A
Inventor
Jerome William Sprauer
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.)
E I du Pont de Nemours and Co
Original Assignee
E I du Pont de Nemours 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 E I du Pont de Nemours and Co filed Critical E I du Pont de Nemours and Co
Priority to GB206156A priority Critical patent/GB808731A/en
Publication of GB808731A publication Critical patent/GB808731A/en
Application status is Expired legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54Catalysts 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
    • B01J23/56Platinum group metals
    • B01J23/64Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54Catalysts 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
    • B01J23/56Platinum group metals
    • B01J23/58Platinum group metals with alkali- or alkaline earth metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14Phosphorus; Compounds thereof
    • B01J27/185Phosphorus; Compounds thereof with iron group metals or platinum group metals
    • B01J27/1856Phosphorus; Compounds thereof with iron group metals or platinum group metals with platinum group metals

Abstract

In the manufacture of a platinum metal-on-alumina catalyst by impregnating activated alumina with a solution of a compound of a platinum metal and reducing the compound to metal, the activated alumina before impregnation is treated with an aqueous solution having a pH in the range 4 to 10 and containing at least one of the following oxidizing agents: water-soluble permanganates, pervanadates, permolybdates, monopersulphates, and perphosphates, hydrogen peroxide, ozone, sodium or other alkali metal peroxide, perhydrates, e.g. sodium perborate or sodium carbonate perhydrate, halogens (especially chlorine and bromine) and oxygen-containing halogen compounds having oxidizing properties, e.g. alkali metal and alkaline earth metal hypochlorites and hypobromites, hypochlorous acid, chlorine dioxide, and the alkali metal chlorites; after treatment of the alumina, the oxidizing agent is substantially completely removed. The aqueous solution preferably contains 0.5-4 per cent by weight of the oxidizing agent and may be applied at a temperature above 50 DEG C. for 0.2 to 2 hours. The pH of the aqueous solution may be adjusted by addition of sodium bicarbonate or carbon dioxide. When the oxidizing agent contains halogen, washing with dilute hydrogen peroxide is desirable before impregnation and reduction. Reduction may be effected with formaldehyde, formates, hydrazine, or hydrogen. The activated alumina may constitute at least 50 per cent by weight of the catalyst support or may itself be supported on kieselguhr. In Example I activated alumina is treated with an aqueous solution of sodium hypochlorite and sodium bicarbonate, washed successively with water and aqueous hydrogen peroxide to remove soluble salts, suspended in water saturated with carbon dioxide, and an aqueous solution containing palladous chloride and hydrochloric acid is added; the slurry is heated, mixed with aqueous formaldehyde to reduce the palladium salt, sodium bicarbonate to adjust the pH, and aqueous hydrogen peroxide to destroy any catalyst poison; the catalyst is then filtered, washed, and dried. In Example III hydrogen peroxide is used as the oxidizing agent in place of sodium hypochlorite. In Examples V and VI the carrier is impregnated with platinum-palladium and palladium-ruthenium, respectively, using aqueous solutions containing chloroplatinic akcid and ruthenium chloride. The catalysts are tested by use in the hydrogenation of 2-t-butylanthraquinone to 2-t-butylanthrahydroquinone. The catalysts are useful in the production of hydrogen peroxide by alternately hydrogenating and oxidizing an alkylanthraquinone.ALSO:2-t-Butylanthrahydroquinone is formed by passing hydrogen into a solution of 2-t-butyl-anthraquinone in a mixture of methylnaphthalene and di-iso-butyl carbinol in the presence of a platinum metal on alumina catlyst, the alumina before impregnation with the platinum metal having been treated with an aqueous solution of an oxidizing agent (see Group III).
GB206156A 1956-01-20 1956-01-20 Preparation of platinum metal catalysts Expired GB808731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB206156A GB808731A (en) 1956-01-20 1956-01-20 Preparation of platinum metal catalysts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB206156A GB808731A (en) 1956-01-20 1956-01-20 Preparation of platinum metal catalysts

Publications (1)

Publication Number Publication Date
GB808731A true GB808731A (en) 1959-02-11

Family

ID=9732915

Family Applications (1)

Application Number Title Priority Date Filing Date
GB206156A Expired GB808731A (en) 1956-01-20 1956-01-20 Preparation of platinum metal catalysts

Country Status (1)

Country Link
GB (1) GB808731A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539081A (en) * 1992-10-02 1996-07-23 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539081A (en) * 1992-10-02 1996-07-23 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof
US5763564A (en) * 1992-10-02 1998-06-09 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof
US5981694A (en) * 1992-10-02 1999-11-09 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof
US6143863A (en) * 1992-10-02 2000-11-07 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof

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