GB846085A - Process for the production of titanium dioxide pigments - Google Patents

Process for the production of titanium dioxide pigments

Info

Publication number
GB846085A
GB846085A GB3150855A GB3150855A GB846085A GB 846085 A GB846085 A GB 846085A GB 3150855 A GB3150855 A GB 3150855A GB 3150855 A GB3150855 A GB 3150855A GB 846085 A GB846085 A GB 846085A
Authority
GB
United Kingdom
Prior art keywords
titanium dioxide
water
rutile
precipitate
sulphuric acid
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
GB3150855A
Inventor
James Thomson Richmond
Raymond James Wigginton
George Geoffrey Durrant
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
Application filed by Laporte Titanium Ltd filed Critical Laporte Titanium Ltd
Priority to GB3150855A priority Critical patent/GB846085A/en
Publication of GB846085A publication Critical patent/GB846085A/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
    • C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
    • C01G23/0532—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing sulfate-containing salts
    • C01G23/0534—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing sulfate-containing salts in the presence of seeds

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

Titanium dioxide pigments are obtained by hydrolysing titanium sulphate solution and calcining the precipitated titanium dioxide, the hydrolysis or calcination being carried out in the presence of a nucleating agent or seed respectively, capable of promoting rutile formation, wherein the precipitated titanium dioxide is treated in the presence of water with an ammonium compound of alkaline reaction, preferably NH4OH or (NH4)2CO3, t neutralise substantially all the sulphuric acid and produce a pH in the range 5-8. The precipitate is then washed to remove (NH4)2SO4 with water substantially free from calcium, magnesium, and silicate ions, preferably distilled water, and finally calcined at a temperature such as to yield a titanium dioxide pigment of good colour and substantially wholly in the rutile form. The temperature used is preferably not more than 100 DEG C. above the minimum temperature required to obtain 95% rutile formation. If desired, a water insoluble zinc compound, preferably ZnO, Zn(OH)2 or ZnCO3, may be incorporated with the precipitate after the neutralisation of sulphuric acid and before or after washing to remove ammonium sulphate. Specification 623,813 is referred to.
GB3150855A 1955-11-03 1955-11-03 Process for the production of titanium dioxide pigments Expired GB846085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3150855A GB846085A (en) 1955-11-03 1955-11-03 Process for the production of titanium dioxide pigments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3150855A GB846085A (en) 1955-11-03 1955-11-03 Process for the production of titanium dioxide pigments

Publications (1)

Publication Number Publication Date
GB846085A true GB846085A (en) 1960-08-24

Family

ID=10324140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3150855A Expired GB846085A (en) 1955-11-03 1955-11-03 Process for the production of titanium dioxide pigments

Country Status (1)

Country Link
GB (1) GB846085A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2308118A (en) * 1995-12-15 1997-06-18 Tioxide Group Services Ltd Rutile titanium dioxide
EP1178011A1 (en) * 2000-07-31 2002-02-06 Sumitomo Chemical Company, Limited Titanium oxide production process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2308118A (en) * 1995-12-15 1997-06-18 Tioxide Group Services Ltd Rutile titanium dioxide
EP1178011A1 (en) * 2000-07-31 2002-02-06 Sumitomo Chemical Company, Limited Titanium oxide production process
US6726891B2 (en) 2000-07-31 2004-04-27 Sumitomo Chemical Company, Limited Titanium oxide production process
EP1614659A2 (en) * 2000-07-31 2006-01-11 Sumitomo Chemical Company, Limited Titanium oxide production process
EP1614659A3 (en) * 2000-07-31 2008-05-14 Sumitomo Chemical Company, Limited Titanium oxide production process

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