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US 5,290,531 AGranted
Method of making ammonium bromide and calcium bromide
AssigneeTetra Technologies, Inc.
InventorsRussell A. Fisher, Surendra K. Mishra, Rosa T. Swartwout
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Abstract
A method of converting sodium bromide brine to ammonium bromide brine and optionally to calcium bromide is disclosed. The method involves introducing ammonia and carbon dioxide into the reactant brine, removing a resulting bicarbonate precipitate, driving off any excess ammonium carbonate, and optionally contacting with lime.
Claims23
A method of making ammonium bromide, comprising the steps of:
- (a) introducing ammonia and carbon dioxide or a reaction product of ammonia and carbon dioxide into a reactant solution comprising sodium bromide brine;
- producing a resulting product solution thereof and
- (b) recovering solid ammonium bromide from the resulting product solution by evaporative crystallization.
A method of making ammonium bromide, comprising the steps of:
- (a) introducing ammonia and carbon dioxide or a reaction product of ammonia and carbon dioxide into a reactant solution comprising sodium bromide brine to provide a product solution comprising ammonium bromide, ammonium bicarbonate, and a sodium bicarbonate precipitate;
- (b) removing from the product solution the sodium bicarbonate precipitate;
- and
- (c) recovering solid ammonium bromide from the product solution by evaporative crystallization.
1 more element
A method of making ammonium bromide, comprising the steps of:
- (a) introducing ammonia into a reactant solution comprising sodium bromide brine;
- (b) maintaining the reactant solution at a temperature below about 60.degree. C.
- (c) introducing carbon dioxide into the reactant solution to provide a product solution comprising ammonium bromide, ammonium bicarbonate, and a sodium bicarbonate precipitate;
- (d) cooling the product solution;
- (e) removing from the product solution the sodium bicarbonate precipitate;
- (g) recovering solid ammonium bromide from the product solution by evaporative crystallization.
3 more elements
A method of making calcium bromide comprising the steps of:
- (a) introducing ammonia and carbon dioxide or a reaction product of ammonia and carbon dioxide into a reactant solution comprising sodium bromide to provide a product solution comprising ammonium bromide and sodium bromide;
- (b) contacting the product solution with calcium hydroxide or calcium oxide to provide a final solution comprising calcium bromide, sodium bromide, and water;
- (c) evaporating at least a portion of the water to increase concentrations of sodium bromide and calcium bromide in the final solution;
- (d) cooling the concentrated final solution sufficiently to precipitate the sodium bromide out of the solution;
- and
- (e) recovering calcium bromide from a remainder of the final solution.
3 more elements
A method of making calcium bromide comprising the steps of:
- (a) introducing ammonia and carbon dioxide or a reaction product of ammonia and carbon dioxide into a reactant solution comprising sodium bromide brine to provide a product solution comprising ammonium bromide, sodium bromide, ammonium bicarbonate and a sodium bicarbonate precipitate;
- (b) removing from the product solution the sodium bicarbonate precipitate;
- (c) contact the product solution with calcium hydroxide or calcium oxide to provide a final solution comprising calcium bromide, sodium bromide, and water;
- (d) evaporating at least a portion of the water to increase concentrations of sodium bromide and calcium bromide in the final solution;
- (e) cooling the concentrated final solution sufficiently to precipitate the sodium bromide out of the solution;
- and
- (f) recovering calcium bromide from a remainder of the final solution.
4 more elements
A method of making calcium bromide comprising the steps of:
- (a) introducing ammonia into a reactant solution comprising sodium bromide brine;
- (b) maintaining the reactant solution at a temperature below about 60.degree. C.;
- (c) introducing carbon dioxide into the reactant solution to provide a product solution comprising ammonium bromide, sodium bromide, ammonium bicarbonate and a sodium bicarbonate precipitate;
- (d) cooling the product solution to help precipitate sodium bicarbonate;
- (e) removing from the product solution the sodium bicarbonate precipitate;
- (f) removing excess ammonium bicarbonate from the product solution by heating;
- (g) contacting the product solution with calcium hydroxide or calcium oxide to produce a final solution comprising calcium bromide, sodium bromide, and water;
- (h) evaporating at least a portion of the water to increase concentrations of sodium bromide and calcium bromide in the final solution;
- (i) cooling the concentrated final solution sufficiently to precipitate the sodium bromide out of the solution;
- and
- (j) recovering calcium bromide from a remainder of the final solution.
8 more elements
Dependencies are inferred from the claim text.