GB566920A - Titanium oxide pigment production - Google Patents
Titanium oxide pigment productionInfo
- Publication number
- GB566920A GB566920A GB1319/43A GB131943A GB566920A GB 566920 A GB566920 A GB 566920A GB 1319/43 A GB1319/43 A GB 1319/43A GB 131943 A GB131943 A GB 131943A GB 566920 A GB566920 A GB 566920A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pigment
- raw
- pressure
- hrs
- rutile
- 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
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
- C01G23/08—Drying; Calcining ; After treatment of titanium oxide
-
- 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
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Cosmetics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
566,920. Disintegrating. DU PONT DE NEMOURS & CO., E. I. Jan. 26, 1943, No. 1319. Convention date, Jan. 9, 1942. [Class 59] [4lso in Group III] Raw pigment-titanium oxide is subjected to a disintegration treatment to reduce the particle size prior to calcining. Preferably, a raw anatase pigment obtained by hydrolysis of titanium sulphate solution, for example as described in U.S. Re-issue Specification 18,854 is subjected to mechanical milling, grinding, pulverizing or extrusion while in the wet or dry state, and then calcined at about 750‹-1000‹ C. in the presence of a small amount of a titaniumoxygen compound rutile conversion promoter as in Specification 565,349, [Group III], or of an alkali metal salt, e.g. sodium and/or potassium sulphate, or of both an alkali metal salt and compounds of polyvalent metals such as Al, Zn, Mg or Be, as described in Specification 580,734, [Group III], as open to inspection under Sect. 91. The initial raw pigment may, however, be any type of TiO2, either in the anatase or rutile form and obtained by neutralization or hydrolysis of other titanium salts such as the nitrate, chloride or oxalate, or an extended pigment comprising' such extenders as barium or calcium sulphate, calcium carbonate or magnesium silicate. Conventional types of grinding, milling and like apparatus may be used such as mills of the ball, pebble or other type, disintegrators, pulverizers, and extruding or ejecting apparatus exerting high fluid or mechanical pressure on the body of pigment being ejected. The time of treatment may vary from say 1-100 hrs. to give optimum particle size. The raw pigment may first be partially dried at 50-200‹ C., dry ground, preferably for 1-4 hrs., and then wet ground, say for 1-4 hrs., in the form of a slurry containing about 300 g./l. TiO2. Ejection or extrusion of aqueous suspensions through a small orifice under high fluid pressure say 1,000-20,000 once, preferably about 1,000- 15,000 lb/in. may be effected. Several ejections at a lower pressure can generally be used instead of one at a high pressure. The pigment slurry containing about 250 g./l. TiO2 may be placed in a pressure vessel with a restricted or' valve-controlled outlet and equipped with a valve control leading to a gas reservoir. Air, hydrogen, steam or other gas is forced into the reservoir which is then connected with the free space in the vessel. The outlet valve is slowly opened to force the slurry through the orifice. A piston, pressure roller or other mechanical means may alternatively be used for forcing the slurry through one or more restricted orifices. Where a rutile promoter is admixed with the raw pigment, it may be added prior to the disintegration treatment. The process may be a batch or continuous one, and ordinary or elevated temperatures and pressures may be maintained during the disintegration. The products have a particle size of the order of 200 millimicrons. Examples describe the wet grinding of an anatase raw pigment in a pebble mill for 16 hrs. followed by calcination and the disintegration of the same pigment mixed with a raw rutile by dry or wet grinding or dry followed by wet grinding in a pebble, ball or colloid mill, in some cases with the addition of sodium and potassium sulphates prior to the subsequent calcining step, or by ejection under a hydrogen pressure of 15,000 lbs/sq. in. or five successive ejections at 7,500 lbs/sq. in.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US566920XA | 1942-01-09 | 1942-01-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB566920A true GB566920A (en) | 1945-01-19 |
Family
ID=22006021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1319/43A Expired GB566920A (en) | 1942-01-09 | 1943-01-26 | Titanium oxide pigment production |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB566920A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4416305A1 (en) * | 1994-05-09 | 1995-11-16 | Bayer Ag | A finely divided, weather stable, high rutile, TiO2 pigment for the pigmentation of synthetic polymers |
JP2009510190A (en) * | 2005-09-26 | 2009-03-12 | トロノックス エルエルシー | Use of this abrasive in a method for producing an abrasive and a method for producing rutile titanium dioxide |
US7824487B2 (en) * | 2004-08-20 | 2010-11-02 | Heubach Gmbh | Rutile-based pigment and a method for the production thereof |
CN111394816A (en) * | 2020-05-20 | 2020-07-10 | 沪本新材料科技(上海)有限公司 | Liquid titanium dioxide slurry for synthetic delustering polyamide fiber |
-
1943
- 1943-01-26 GB GB1319/43A patent/GB566920A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4416305A1 (en) * | 1994-05-09 | 1995-11-16 | Bayer Ag | A finely divided, weather stable, high rutile, TiO2 pigment for the pigmentation of synthetic polymers |
US7824487B2 (en) * | 2004-08-20 | 2010-11-02 | Heubach Gmbh | Rutile-based pigment and a method for the production thereof |
JP2009510190A (en) * | 2005-09-26 | 2009-03-12 | トロノックス エルエルシー | Use of this abrasive in a method for producing an abrasive and a method for producing rutile titanium dioxide |
AU2006295235B2 (en) * | 2005-09-26 | 2012-08-30 | Tronox Llc | Method for making a scour medium and use of such medium in a method for producing rutile titanium dioxide |
CN111394816A (en) * | 2020-05-20 | 2020-07-10 | 沪本新材料科技(上海)有限公司 | Liquid titanium dioxide slurry for synthetic delustering polyamide fiber |
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