Chemistry of inorganic compounds – Halogen or compound thereof – Binary compound containing metal
Reexamination Certificate
2002-02-21
2008-11-18
Nguyen, Ngoc-Yen M (Department: 1793)
Chemistry of inorganic compounds
Halogen or compound thereof
Binary compound containing metal
C423S157000
Reexamination Certificate
active
07452520
ABSTRACT:
A process for the production of calcium bromide from feed brines, particularly from Dead Sea End Brine (EB), is described. The process comprises extracting the feed brine in countercurrent with a composite organic solvent; optionally, purifying the extract to increase the ratio Br:Cl by contacting it with a part of the product; and washing the purified extract with water to yield the product, that is an aqueous solution of CaBr2. The composite solvent comprises an anionic extractant, such as an amine or a mixture of amines; a cationic extractant, such as a carboxylic phosphoric or sulphonic acid or a mixtures of said acids; and diluent/modifier, which is an organic solvent. An apparatus for the production of calcium bromide is also described, which comprises: an extraction battery; optionally, a purification battery; and a washing battery, wherein at least one of the batteries comprises a plurality of stages.
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Barnea Eli
Grinbaum Baruch
Harel Gideon
Kogan Leni
Semiat Rafael
Bromine Compounds Limited
Lerner David Littenberg Krumholz & Mentlik LLP
Nguyen Ngoc-Yen M
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