WO1991017118A1
Expired / Lapsed
WO
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A process and plant for the preparation of alkaline chromates from chromium minerals
Assignee: Luigi Stoppani SpA
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Filing: 1991-04-29
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Granted: —
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Expires: 2011-04-29
Abstract
Abstract The present invention relates to the production of alkaline chromates from chromium minerals. The ground minerals are mixed finely with alkali. Then the mixture is continuously fed into a rotating reactor (1) positioned in a heating chamber (5) and heated to a temperature of between 500° and 1500 °C. Simultaneously the mixture is fed through (4) with one or more oxidation gases containing oxygen with known, pre-established and adjustable composition in order to oxidize the trivalent chromium compounds in a controlled environment. The oxidized mixture is conveyed through means (3) and is then leached.
Inventors
- 👤 Giuseppe Bruzzone
- 👤 Diego Perrone
- 👤 Alfredo Parodi
Bibliographic Details
Application Number
—
Jurisdiction
WO
Data Source
google_patents
Last Synchronized
2026-10-22 21:09
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/32; C01; C01G; C01G37/00; C01G37/14; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
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References Cited (Backward Citations)
US3295954A
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US3963824A
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