GB686570A - Production of finely divided titanium dioxide - Google Patents

Production of finely divided titanium dioxide

Info

Publication number
GB686570A
GB686570A GB24337/50A GB2433750A GB686570A GB 686570 A GB686570 A GB 686570A GB 24337/50 A GB24337/50 A GB 24337/50A GB 2433750 A GB2433750 A GB 2433750A GB 686570 A GB686570 A GB 686570A
Authority
GB
United Kingdom
Prior art keywords
chloride
aluminium
mixture
titanium
vapours
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
GB24337/50A
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.)
Saeurefabrik Schweizerhall
Original Assignee
Saeurefabrik Schweizerhall
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 Saeurefabrik Schweizerhall filed Critical Saeurefabrik Schweizerhall
Publication of GB686570A publication Critical patent/GB686570A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00Compounds of titanium
    • C01G23/04Oxides; Hydroxides
    • C01G23/047Titanium dioxide
    • C01G23/07Producing by vapour phase processes, e.g. halide oxidation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

Pigmentary titanium dioxide of which at least 90 per cent consists of rutile, is produced by discharging a uniform premixture of titanium tetrachloride vapours, gases containing free oxygen, and a volatile aluminium compound in amount sufficient to yield a product containing 0.01-10 per cent alumina, into a combustion zone, suitably at a linear flow rate of 1-50 metres per second, the mixture being at a temperature of 135-500 DEG C., and continuously contacting the premixture with an auxiliary flame sustained by a separate inflow of combustible gas to ignite the mixture and maintain it in a flaming state. Suitable aluminium compounds are aluminium halides, e.g. chloride, trimethyl aluminiums &c. The aluminium chloride may be mixed with the titanium chloride to be vaporized, by passing the oxygen-containing gas therethrough or it may be separately sublimed, e.g. by passing chlorine, with or without a diluent gas, over aluminium shavings or a mixture of alumina and carbon, or carbon monoxide and chlorine, or phosgene, over alumina, the vapours being added to the titanium chloride vapours. The premixture should contain at least 50 per cent, up to a surplus, of oxygen for the decomposition of the titanium tetrachloride. Inert gas such as carbon dioxide or nitrogen may also be present. Methane, acetylene, hydrogen &c. or, preferably, carbon monoxide are employed as combustible gases. Temperatures of 1000-1600 DEG C immediately ambient to the auxiliary flame are specified. Examples disclose burners consisting of concentric tubes, the titanium chloride mixture supply tube being surrounded by, and in some cases also surrounding, the supply tubes for the auxiliary flame-producing gases. The product may evacuated to remove chlorine and hydrogen chloride, and neutralized with a small amount of lime. Specification 673,782 is referred to.
GB24337/50A 1949-10-08 1950-10-05 Production of finely divided titanium dioxide Expired GB686570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH686570X 1949-10-08

Publications (1)

Publication Number Publication Date
GB686570A true GB686570A (en) 1953-01-28

Family

ID=4528907

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24337/50A Expired GB686570A (en) 1949-10-08 1950-10-05 Production of finely divided titanium dioxide

Country Status (1)

Country Link
GB (1) GB686570A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957753A (en) * 1958-11-05 1960-10-25 American Cyanamid Co Titanium dioxide from titanium tetrachloride
US3174873A (en) * 1960-04-25 1965-03-23 British Titan Products Entrainment of vapours in gases
FR2160371A1 (en) * 1971-11-17 1973-06-29 Sir Soc Italiana Resine Spa
US5824146A (en) * 1997-07-03 1998-10-20 E. I. Du Pont De Nemours And Company Method for making a photodurable aqueous titanium dioxide pigment slurry using a high level of aluminum co-oxidant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957753A (en) * 1958-11-05 1960-10-25 American Cyanamid Co Titanium dioxide from titanium tetrachloride
US3174873A (en) * 1960-04-25 1965-03-23 British Titan Products Entrainment of vapours in gases
FR2160371A1 (en) * 1971-11-17 1973-06-29 Sir Soc Italiana Resine Spa
US5824146A (en) * 1997-07-03 1998-10-20 E. I. Du Pont De Nemours And Company Method for making a photodurable aqueous titanium dioxide pigment slurry using a high level of aluminum co-oxidant
WO1999001518A1 (en) * 1997-07-03 1999-01-14 E.I. Du Pont De Nemours And Company Method for making a photodurable aqueous titanium dioxide pigment slurry

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