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1.发明授权PROCESS AND APPARATUS FOR THE PRODUCTION OF CALCIUM BROMIDE BY LIQUID-LIQUID EXTRACTION 有权方法和制造装置中的钙通过液 - 液萃取
公开(公告)号：EP1414748B1
公开(公告)日：2011-10-19
申请号：EP02700548.7
申请日：2002-02-21
发明人： GRINBAUM, Baruch , KOGAN, Leni , BARNEA, Eli , HAREL, Gideon , SEMIAT, Rafael , WAHRMANN, Samuel
IPC分类号： C01F11/00
摘要： 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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2.发明公开PROCESS AND APPARATUS FOR THE PRODUCTION OF CALCIUM BROMIDE BY LIQUID-LIQUID EXTRACTION 有权方法和制造装置中的钙通过液 - 液萃取
公开(公告)号：EP1414748A2
公开(公告)日：2004-05-06
申请号：EP02700548.7
申请日：2002-02-21
发明人： GRINBAUM, Baruch , KOGAN, Leni , BARNEA, Eli , HAREL, Gideon , SEMIAT, Rafael , WAHRMANN, Samuel
IPC分类号： C01F11/00
摘要： 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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3.发明公开
公开(公告)号：EP1585706A1
公开(公告)日：2005-10-19
申请号：EP03777140.9
申请日：2003-12-01
发明人： ELITZUR, Raphael , GRINBAUM, Baruch , FREIBERG-BERGSTEIN, Miriam , METCALFE, John , MASARWA, Mohamad
摘要： A process for the preparation of Solid Calcium Bromide Hydrates comprises preparing a highly concentrated Calcium Bromide solution from an initial solution having a lower concentration, bringing it into contact with a cold surface, whereby solid Calcium Bromide hydrates form on said surface, and detaching said solid hydrates from said surface. The concentration of the initial solution is not higher than 60 wt%, typically 52 wt%, and is brought to from 65 to 78 wt%. The said Calcium Hydrates are mainly tetrahydrate Calcium Bromide. The Solid Calcium Hydrates have many uses in the processing of oil wells, for instance preparation of completion fluids, work-over fluids or drill-in fluids in the processing of wells, restoring already used and/or depleted such fluids to the desired, original density. They also have other uses, particularly for soil remediation.
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