GB705615A - Improvements in and relating to catalysts and their preparation - Google Patents

Improvements in and relating to catalysts and their preparation

Info

Publication number
GB705615A
GB705615A GB2226951A GB2226951A GB705615A GB 705615 A GB705615 A GB 705615A GB 2226951 A GB2226951 A GB 2226951A GB 2226951 A GB2226951 A GB 2226951A GB 705615 A GB705615 A GB 705615A
Authority
GB
United Kingdom
Prior art keywords
per cent
potassium
vanadium
compound
ammonia
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
GB2226951A
Inventor
John Robinson
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB2226951A priority Critical patent/GB705615A/en
Publication of GB705615A publication Critical patent/GB705615A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/87—Benzo [c] furans; Hydrogenated benzo [c] furans
    • C07D307/89—Benzo [c] furans; Hydrogenated benzo [c] furans with two oxygen atoms directly attached in positions 1 and 3
    • 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
    • B01J23/20—Vanadium, niobium or tantalum
    • B01J23/22—Vanadium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/69—Sulfur trioxide; Sulfuric acid
    • C01B17/74—Preparation
    • C01B17/76—Preparation by contact processes
    • C01B17/78—Preparation by contact processes characterised by the catalyst used
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
    • C10G11/04—Oxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Catalysts (AREA)
  • Furan Compounds (AREA)

Abstract

Phthalic anhydride is produced by oxidation of naphthalene by the use of catalysts comprising a vanadium oxide and a potassium compound on silica gel. Preferred proportions (expressed as weight percentages of V2O5 and K2O) for this purpose are: vanadium, 9-11 per cent.; potassium, 16-20 per cent. Fluidized technique may be used.ALSO:A catalyst comprising a vanadium oxide and a potassium compound on silica gel is prepared by a process comprising slowly adding a potassium silicate solution to dilute (e.g. 10 per cent. or 15 per cent.) sulphuric acid whilst agitating, mixing the so-formed silica sol with a solution of a soluble vanadium compound such as vanadyl sulphate, chloride or oxalate, or ammonium vanadate whilst agitating, coprecipitating silica and an insoluble vanadium compound (e.g. by means of aqueous ammonia) whilst agitating, drying and grinding the filtered or unfiltered product. This product may be calcined, e.g. in fluidized suspension. When adding the potassium silicate solution the pH should not rise above 4 and the ammonia is preferably added until a pH of about 6.5 is reached, after which agitation is continued until a pH of 8-8.5 is obtained. The potassium silicate and ammonia solutions are preferably added as spray or as fine jets. In the finished catalyst the optimum percentage of potassium (as K2O) to vanadium (as V2O5) is believed to be about 2; compositions of 7-12 per cent. V2O5, 12-22 per cent. K2O, and 40-55 per cent. SiO2, and for the purpose of oxidizing naphthaline to phthalic anhydride, of 9-11 per cent. V2O5 and 16-20 per cent. K2O are preferred. The oxidation of sulphur dioxide is also referred to.
GB2226951A 1951-09-24 1951-09-24 Improvements in and relating to catalysts and their preparation Expired GB705615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2226951A GB705615A (en) 1951-09-24 1951-09-24 Improvements in and relating to catalysts and their preparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2226951A GB705615A (en) 1951-09-24 1951-09-24 Improvements in and relating to catalysts and their preparation

Publications (1)

Publication Number Publication Date
GB705615A true GB705615A (en) 1954-03-17

Family

ID=10176640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2226951A Expired GB705615A (en) 1951-09-24 1951-09-24 Improvements in and relating to catalysts and their preparation

Country Status (1)

Country Link
GB (1) GB705615A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086218B (en) * 1956-08-13 1960-08-04 Ici Ltd Process for the production of catalysts for the oxidation of sulfur dioxide to sulfur trioxide
DE1091547B (en) * 1956-08-13 1960-10-27 Ici Ltd Process for the production of catalysts for the oxidation of sulfur dioxide to sulfur trioxide
DE1160410B (en) * 1956-08-13 1964-01-02 Ici Ltd Process for the production of catalysts containing vanadium, silica, sodium and potassium for the catalytic oxidation of sulfur dioxide to sulfur trioxide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086218B (en) * 1956-08-13 1960-08-04 Ici Ltd Process for the production of catalysts for the oxidation of sulfur dioxide to sulfur trioxide
DE1091547B (en) * 1956-08-13 1960-10-27 Ici Ltd Process for the production of catalysts for the oxidation of sulfur dioxide to sulfur trioxide
DE1160410B (en) * 1956-08-13 1964-01-02 Ici Ltd Process for the production of catalysts containing vanadium, silica, sodium and potassium for the catalytic oxidation of sulfur dioxide to sulfur trioxide

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