PROCESS AND APPARATUS FOR THE PRODUCTION OF CALCIUM BROMIDE BY LIQUID-LIQUID EXTRACTION
    18.
    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

    IPC分类号: C01F11/00

    CPC分类号: C01F5/30 C01F5/36 C01F11/24

    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.

    A PROCESS FOR THE PREPARATION OF BRONOPOL
    19.
    发明公开
    A PROCESS FOR THE PREPARATION OF BRONOPOL 有权
    用于生产溴硝丙二醇

    公开(公告)号:EP2247568A1

    公开(公告)日:2010-11-10

    申请号:EP09716009.7

    申请日:2009-02-26

    发明人: OREN, Jacob

    IPC分类号: C07C201/12 C07C205/15

    摘要: The invention provides a process for preparing bronopol, which process comprises charging a reaction vessel with water, bromopicrin, nitromethane and paraformaldehyde, gradually feeding a base into said reaction vessel under stirring, bringing the reaction to completion and separating bronopol from the aqueous reaction mixture.