GB1007359A - Improved process for the preparation of palladium catalysts and catalysts obtained thereby - Google Patents

Improved process for the preparation of palladium catalysts and catalysts obtained thereby

Info

Publication number
GB1007359A
GB1007359A GB792763A GB792763A GB1007359A GB 1007359 A GB1007359 A GB 1007359A GB 792763 A GB792763 A GB 792763A GB 792763 A GB792763 A GB 792763A GB 1007359 A GB1007359 A GB 1007359A
Authority
GB
United Kingdom
Prior art keywords
catalysts
hydroxide
preparation
improved process
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
GB792763A
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.)
SNIA Viscosa SpA
Original Assignee
SNIA Viscosa SpA
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 SNIA Viscosa SpA filed Critical SNIA Viscosa SpA
Publication of GB1007359A publication Critical patent/GB1007359A/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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
    • C07C51/36—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by hydrogenation of carbon-to-carbon unsaturated bonds
    • 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
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/18—Carbon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

Benzoic acid is hydrogenated to hexahydrobenzoic acid in the presence of a catalyst made by adding at least an equimolar amount of alkaline hydroxide to an aqueous suspension of carbon in a palladium salt solution to precipitate Pd(OH)2, and reducing the hydroxide to metal. Examples are given in which the hydrogenation temperature is about 130-135 DEG C. and the pressure is 100-150 atmospheres.ALSO:Hydrogenation catalysts are made by adding an at least equimolar amount of alkaline hydrooxide to an aqueous suspension of carbon in a palladium salt solution to precipitate Pd(OH)2 and reducing the hydroxide to metal. Preferred Pd salt is PdCl2. Reduction may be effected by H.CHO or hydrogen.
GB792763A 1962-03-09 1963-02-27 Improved process for the preparation of palladium catalysts and catalysts obtained thereby Expired GB1007359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT470762 1962-03-09

Publications (1)

Publication Number Publication Date
GB1007359A true GB1007359A (en) 1965-10-13

Family

ID=11112921

Family Applications (1)

Application Number Title Priority Date Filing Date
GB792763A Expired GB1007359A (en) 1962-03-09 1963-02-27 Improved process for the preparation of palladium catalysts and catalysts obtained thereby

Country Status (1)

Country Link
GB (1) GB1007359A (en)

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