Preparation of metal bromides
AssigneeEthyl Corporation
InventorKestutis A. Keblys
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Abstract
Metal bromides, and particularly alkali and alkaline earth metal bromides, are prepared from a basic metal compound and bromine in the presence of added formaldehyde as a reducing agent.
Claims12
A process for preparing basic metal bromides which comprises contacting in an aqueous medium a basic metal compound and bromine in the presence of added formaldehyde as a reducing agent.
A process for the preparation of CaBr.sub.2, said process comprising reacting lime and bromine in an aqueous reaction medium using added formaldehyde as a reducing agent, said process being carried out by adding separately to a water-lime mixture, (i) bromine, and (ii) an aqueous solution of about 25-40% formaldehyde, the relative rates of addition being such that the reaction temperature is maintained in the range of from about 60.degree. to about 90.degree. C. and the formaldehyde addition is complete when about two-thirds of the bromine has been added, with the amount of bromine being substantially stoichiometric or slightly less than stoichiometric with respect to said calcium compound and the amount of formaldehyde added being stoichiometric or slightly in excess of stoichiometry with respect to bromine.
Dependencies are inferred from the claim text.