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    PROCESS FOR MANUFACTURING OF SODIUM HYDROXIDE
    61.
    发明专利
    PROCESS FOR MANUFACTURING OF SODIUM HYDROXIDE 未知

    公开(公告)号：HUT66144A

    公开(公告)日：1994-09-28

    申请号：HU9300615

    申请日：1993-03-05

    Applicant: SOLVAY

    Inventor： BOURGEOIS LOUIS

    IPC: C25B1/16 ,  B01D61/42 ,  B01D61/44 ,  C01D1/38 ,  C25B7/00 ,  C01D1/04 ,  C01D1/40

    Abstract: Process for the manufacture of sodium hydroxide, according to which an electrodialysis cell is used, water or an aqueous sodium hydroxide solution (10, 10') is introduced into a chamber (6, 6') of the cell, defined between a cationic membrane (2, 2') and an anionic face (8, 8') of a bipolar membrane (3, 3'), an aqueous sodium carbonate solution (11, 11') is introduced into a chamber (7, 7') defined between a cationic face (9, 9') of the bipolar membrane (3, 3') and another cationic membrane (2', 2''), an alkaline pH is maintained in the chamber (7, 7') which is supplied with the sodium carbonate solution (11, 11') and an aqueous sodium hydroxide solution (12, 12') is drawn off from the chamber (6, 6') containing the anionic face (8, 8') of the bipolar membrane (3, 3').

    62.
    发明专利
    未知

    公开(公告)号：NO932432L

    公开(公告)日：1994-01-04

    申请号：NO932432

    申请日：1993-07-02

    Applicant: SOLVAY

    Inventor： BOURGEOIS LOUIS

    IPC: B01D61/44 ,  C01D1/38 ,  C25B1/16

    Abstract: Process for the manufacture of an aqueous solution of sodium hydroxide by electrodialysis of an aqueous solution (15) of a sodium salt derived from an acid of pK lower than the pK of carbonic acid, obtained by circulating an aqueous solution of the said acid (14) and an aqueous solution of sodium carbonate (13) on either side of a cationic membrane (12).

    67.
    发明专利
    未知

    公开(公告)号：NO792732L

    公开(公告)日：1980-02-26

    申请号：NO792732

    申请日：1979-08-23

    Applicant: SOLVAY

    Inventor： NICOLAS EDGARD ,  BOURGEOIS LOUIS

    IPC: C25B1/02 ,  C25B11/04 ,  C25B11/06 ,  C25B

    Abstract: The invention relates to a process for the electrolytic production of hydrogen in an alkaline medium. The process consists in using a cathode, the active surface of which essentially consists of an oxide compound of the spinel type. The process is suitable, in particular, for the electrolysis of aqueous solutions of sodium chloride in cells with a permeable diaphragm.

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