GB760644A - Improvements in method of preparing titanium dioxide - Google Patents
Improvements in method of preparing titanium dioxideInfo
- Publication number
- GB760644A GB760644A GB22683/54A GB2268354A GB760644A GB 760644 A GB760644 A GB 760644A GB 22683/54 A GB22683/54 A GB 22683/54A GB 2268354 A GB2268354 A GB 2268354A GB 760644 A GB760644 A GB 760644A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tetrachloride
- employed
- titanium
- subchloride
- preheated
- 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
- C01G23/07—Producing by vapour phase processes, e.g. halide oxidation
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
In the production of titanium dioxide by vapour phase oxidation of the tetrachloride at 800 to 1,350 DEG C., 0.1 to 10 per cent of a subchloride of titanium is added to the tetrachloride as a nucleating agent. The subchloride is preferably formed by passing a portion of the tetrachloride feed over a reducing agent such as a metal or a hydride, or by contact with hydrogen, and the resulting vaporous or finely divided solid lower chloride/tetrachloride mixture is reunited with the main tetrachloride stream. The temperature of the lower chloride generator is preferably 136 to 400 DEG C. The halide oxidation may be effected with air or oxygen, mixed, if desired, with inert gases and 0.05 to 5 per cent of water vapour, the oxygen preferably being present in excess. Atmospheric, lower or higher pressures may be employed and the reactant retention time may be from 0.01 to 5 seconds. The reaction products are preferably quickly cooled and subsequently the titanium dioxide may be calcined and ground. According to a typical example, a titanium tetrachloride vapour stream, preheated in a nickel heat exchanger to 400 DEG C., was split and a minor portion contacted with pulverized titanium metal sponge to generate subchloride, after which this side stream rejoined the main stream and was fed to an elongated reactor. Air, preheated to 1100 DEG C. was injected through a separate inlet. The dioxide reaction product was calcined and ground in the usual manner. Another example relates to tetrachloride, preheated to 200 DEG C. and a diverted portion reacted with molten sodium to generate the lower chlorides. In this case oxygen preheated to 850 DEG C. was employed as oxidant. If metals are employed as reducing agents in the subchloride generator, their chlorides may be carried into the main reactor. Thus tin or aluminium may be employed and their chlorides oxidized with the titanium tetrachloride. Alternatively, aluminium chloride may be added in small amounts as in Specification 707,560. Other nucleating agents such as water vapour, nitrogen oxides or normally unstable metal subhalides may also be employed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22683/54A GB760644A (en) | 1954-08-04 | 1954-08-04 | Improvements in method of preparing titanium dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22683/54A GB760644A (en) | 1954-08-04 | 1954-08-04 | Improvements in method of preparing titanium dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB760644A true GB760644A (en) | 1956-11-07 |
Family
ID=10183420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22683/54A Expired GB760644A (en) | 1954-08-04 | 1954-08-04 | Improvements in method of preparing titanium dioxide |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB760644A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011059938A1 (en) * | 2009-11-10 | 2011-05-19 | E. I. Du Pont De Nemours And Company | Process for in-situ formation of chlorides of silicon and aluminum in the preparation of titanium dioxide |
| WO2012039731A1 (en) * | 2010-09-21 | 2012-03-29 | E. I. Du Pont De Nemours And Company | Process for in-situ formation of chlorides in the preparation of titanium dioxide |
| CN102686516A (en) * | 2010-09-21 | 2012-09-19 | 纳幕尔杜邦公司 | Tungsten containing inorganic particles with improved photostability |
| US8734755B2 (en) | 2010-02-22 | 2014-05-27 | E I Du Pont De Nemours And Company | Process for in-situ formation of chlorides of silicon, aluminum and titanium in the preparation of titanium dioxide |
-
1954
- 1954-08-04 GB GB22683/54A patent/GB760644A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011059938A1 (en) * | 2009-11-10 | 2011-05-19 | E. I. Du Pont De Nemours And Company | Process for in-situ formation of chlorides of silicon and aluminum in the preparation of titanium dioxide |
| US8741257B2 (en) | 2009-11-10 | 2014-06-03 | E I Du Pont De Nemours And Company | Process for in-situ formation of chlorides of silicon and aluminum in the preparation of titanium dioxide |
| US8734755B2 (en) | 2010-02-22 | 2014-05-27 | E I Du Pont De Nemours And Company | Process for in-situ formation of chlorides of silicon, aluminum and titanium in the preparation of titanium dioxide |
| WO2012039731A1 (en) * | 2010-09-21 | 2012-03-29 | E. I. Du Pont De Nemours And Company | Process for in-situ formation of chlorides in the preparation of titanium dioxide |
| CN102686516A (en) * | 2010-09-21 | 2012-09-19 | 纳幕尔杜邦公司 | Tungsten containing inorganic particles with improved photostability |
| US8734756B2 (en) | 2010-09-21 | 2014-05-27 | E I Du Pont De Nemours And Company | Process for in-situ formation of chlorides in the preparation of titanium dioxide |
| US9260319B2 (en) | 2010-09-21 | 2016-02-16 | The Chemours Company Tt, Llc | Process for in-situ formation of chlorides in the preparation of titanium dioxide |
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