Metal chloride generator and improved process for the production of metal chlorides used in the manufacture of titanium dioxide by the chloride process
AssigneeKronos, Inc.
InventorsAchim Hartmann, Herman Trub
Life of this patent
Estimating the term…
Abstract
In the preparation of metal chlorides from their elements to be used as additives in processes of making titanium dioxide by the chloride process, a titanium tetrachloride stream is directed to sweep over the lined inner wall of a metal chloride generator to act as a protective film, which considerably increases the life of the generator. Furthermore, the titanium tetrachloride is further heated, which is highly desirable in the chloride process. When the titanium tetrachloride is optionally conducted in advance through ducts in the lining of the inner walls of the metal chloride generator, its temperature can be further raised.
Claims6
A process for forming metal chloride or chlorides, useful as additives in the manufacture of titanium dioxide by the chloride process, from chlorine and at least one metal by an exothermic reaction in a metal chloride generator, comprising:
- a) introducing said metal or metals and chlorine into a metal chloride generator, said metal chloride generator having interior lined wall surfaces and ducts behind or within the interior lined wall surfaces,
- b) reacting the metal or metals and chlorine to form metal chloride or chlorides,
- c) flowing a titanium tetrachloride stream through said ducts behind or within the interior lined wall surfaces of the metal chloride generator,
- d) sweeping over the interior lined wall surfaces of the metal chloride generator said titanium tetrachloride stream in a manner so that the metal chloride or chlorides are substantially kept from direct wall contact in the generator, and
- e) removing the titanium tetrachloride stream and the metal chloride or chlorides from the metal chloride generator.
A process for forming metal chloride or chlorides, useful as additives in the manufacture of titanium dioxide by the chloride process, from chlorine and at least one metal by an exothermic reaction in a metal chloride generator, comprising:
- a) introducing said metal or metals and chlorine into a metal chloride generator,
- b) introducing a titanium tetrachloride stream heated to a temperature of 350.degree. C. or more into the metal chloride generator in such a manner that said stream ignites the exothermic reaction of the chlorine and the metal or metals,
- c) reacting the metal or metals and chlorine to form metal chloride or chlorides, and
- d) removing the titanium tetrachloride stream and the metal chloride or chlorides from the metal chloride generator.
Dependencies are inferred from the claim text.