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US 4,083,923 AGranted
Process for the production of aluminum chloride and related products
AssigneeToth Aluminum Corporation
InventorsAlfred Lippman, Roger Frank Sebenik
Life of this patent
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Abstract
The present invention provides a process for the production of aluminum chloride and alumina of metallurgical grade purity, and valuable by-products from aluminous ores like clay, bauxites and laterites. The process comprises carbo-chlorination of the ore to produce aluminum chloride and other metal chlorides. The aluminum chloride is separated, purified and utilized as such or oxidized to make alumina while the other metal chlorides are processed to recover maximum values.
Claims15
A process for the production of aluminum chloride comprising the following steps:
- A. carbo-chlorinating at up to 1,000.degree. C a dehydrated iron containing aluminous ore to produce a mixed chloride gas stream comprising primarily aluminum chloride, iron chloride, (other metal chloride) titanium cloride, silicon chloride, vaporous components and carbon oxides;
- and
- B. extracting the aluminum chloride and iron chloride components out of the mixed chloride gas stream by contacting the stream with a liquid metal chloride solvent in which the aluminum chloride and iron chloride are soluble to preferentially dissolve the aluminum chloride and iron chloride, then distilling the aluminum chloride and iron chloride from the liquid metal chloride solvent, subsequently separating the aluminum chloride from the iron chloride by rectification to obtain essentially aluminum chloride, and contacting the aluminum chloride with molten aluminum capable of reacting with impurity chlorides to form compounds that will not contaminate the aluminum chloride effluent to obtain aluminum chloride.
Dependencies are inferred from the claim text.