GB971747A - Improvements in and relating to the manufacture of oxides - Google Patents

Improvements in and relating to the manufacture of oxides

Info

Publication number
GB971747A
GB971747A GB6393/60A GB639360A GB971747A GB 971747 A GB971747 A GB 971747A GB 6393/60 A GB6393/60 A GB 6393/60A GB 639360 A GB639360 A GB 639360A GB 971747 A GB971747 A GB 971747A
Authority
GB
United Kingdom
Prior art keywords
reactor
oxide particles
zone
oxidation
chloride
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
GB6393/60A
Inventor
James Thomson Richmond
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.)
Laporte Titanium Ltd
Original Assignee
Laporte Titanium 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
Priority to NL261603D priority Critical patent/NL261603A/xx
Priority to NL130623D priority patent/NL130623C/xx
Application filed by Laporte Titanium Ltd filed Critical Laporte Titanium Ltd
Priority to GB6393/60A priority patent/GB971747A/en
Priority to US90281A priority patent/US3148027A/en
Priority to DEL38261A priority patent/DE1177114B/en
Publication of GB971747A publication Critical patent/GB971747A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide
    • C01G23/07—Producing by vapour phase processes, e.g. halide oxidation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/20—Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state
    • C01B13/22—Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state of halides or oxyhalides
    • C01B13/26—Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state of halides or oxyhalides in the presence of a fluidised bed
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
    • C01B33/181—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by a dry process
    • C01B33/183—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by a dry process by oxidation or hydrolysis in the vapour phase of silicon compounds such as halides, trichlorosilane, monosilane
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/30—Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
    • C01F7/302—Hydrolysis or oxidation of gaseous aluminium compounds in the gaseous phase
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/51—Particles with a specific particle size distribution
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Silicon Compounds (AREA)

Abstract

Oxides of titanium, zirconium, aluminium and silicon are prepared by reacting the chloride of the element with an oxidizing gas in the vapour phase, the reaction being carried out within a bed of particles of an oxide of one or more of said elements, maintained in a fluidized condition at 750 DEG to 1500 DEG C., a part of the oxide produced remaining in the bed and the size distribution of the oxide particles forming the bed is controlled by withdrawing oxide particles from the oxidation zone, reacting the withdrawn particles with a chlorinating and reducing agent to form oxide particles of a <PICT:0971747/C1/1> reduced size and to form the vapour of said chloride, and removing at least some of the particles of reduced size from the chlorination zone by allowing them to become entrained in the gas stream leaving the chlorination zone and introducing the oxide particles of reduced size and the chloride vapour into the oxidation zone. Advantageously the oxidation and chlorination zones are different zones of the same reactor as shown in Fig. 1. Thus the chlorinating and reducing agent is introduced into the reactor at the base thereof through tangential inlets 17 and 18, the chloride and oxidizing gas being introduced into the same reactor at a higher level through lines 15 and 16 respectively. The horizontal cross-sectional area of the reactor increases upwardly at and/or above the said higher level, and the rates of feed of substances to the reactor and the dimensions of the reactor are so selected that the oxide particles are maintained in the form of a fluidized bed in which the chloride undergoes oxidation in a high zone of the reactor, oxide particles above a certain size fall towards the base of the reactor into a lower zone where they undergo partial chlorination, and the resulting oxide particles of reduced size are carried up into the oxidation zone. Product TiO2 is entrained in the gas stream leaving the chlorination zone. The oxidizing gas may be a gaseous oxygen compound, e.g. an oxide of nitrogen; advantageously it is oxygen and it is introduced into the reactor, either in the pure form or as air, through inlets directed tangentially to impact a swirling motion to the oxide particles forming the oxidation bed. The chlorinating and reducing agent may be a single gaseous substance, e.g. COCl2, or separate chlorinating agents and reducing agents may be used; preferably the former is Cl2 and the latter CO. Specification 866,363 is referred to.
GB6393/60A 1960-02-23 1960-02-23 Improvements in and relating to the manufacture of oxides Expired GB971747A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL261603D NL261603A (en) 1960-02-23
NL130623D NL130623C (en) 1960-02-23
GB6393/60A GB971747A (en) 1960-02-23 1960-02-23 Improvements in and relating to the manufacture of oxides
US90281A US3148027A (en) 1960-02-23 1961-02-20 Vapor phase process for producing metal oxides
DEL38261A DE1177114B (en) 1960-02-23 1961-02-21 Process for the production of an oxide of one of the elements titanium, zirconium, iron, aluminum and silicon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6393/60A GB971747A (en) 1960-02-23 1960-02-23 Improvements in and relating to the manufacture of oxides

Publications (1)

Publication Number Publication Date
GB971747A true GB971747A (en) 1964-10-07

Family

ID=9813703

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6393/60A Expired GB971747A (en) 1960-02-23 1960-02-23 Improvements in and relating to the manufacture of oxides

Country Status (3)

Country Link
DE (1) DE1177114B (en)
GB (1) GB971747A (en)
NL (2) NL130623C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061370A1 (en) * 1998-05-27 1999-12-02 E.I. Du Pont De Nemours And Company Particle size control in pyrohydrolysis of metal chlorides

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7968077B2 (en) 2006-12-20 2011-06-28 Kronos International, Inc. Method for manufacturing titanium dioxide by oxidizing of titanium tetrachloride

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE539077A (en) *
GB866363A (en) * 1958-01-31 1961-04-26 Laporte Titanium Ltd Improvements in and relating to the manufacture of titanium dioxide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061370A1 (en) * 1998-05-27 1999-12-02 E.I. Du Pont De Nemours And Company Particle size control in pyrohydrolysis of metal chlorides
AU737869B2 (en) * 1998-05-27 2001-09-06 E.I. Du Pont De Nemours And Company Particle size control in pyrohydrolysis of metal chlorides

Also Published As

Publication number Publication date
NL261603A (en)
DE1177114B (en) 1964-09-03
NL130623C (en)

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