2.
    发明专利
    未知

    公开(公告)号:DE1159413B

    公开(公告)日:1963-12-19

    申请号:DEB0067832

    申请日:1962-06-27

    Applicant: BASF AG

    Abstract: 1,039,832. Electric resistance heating. BADISCHE ANILIN- & SODA-FABRIK A.G. June 26, 1963 [June 27, 1962], No. 25363/63. Heading H5H. In an electrically heated film evaporator for dehydrating caustic alkali solutions, the evaporator tube 1 is heated by passing a current directly through it by means of contact plates 2, 3. A roughened or tapped portion distributes the incoming solution on the inner surface of the tube. A fan (not shown) is coupled to the upper end of the tube to draw off water vapour. In the embodiment described, the tube is 7 m. long, 70 mm. i.d. with 6 m. between plates. Several tubes may be connected in series. The tube wall thickness may vary to alter the evaporation rate of portions of the tube. It is suggested that solutions should be concentrated to 71% by cheaper energy sources before the solutions are fed to the tube.

    3.
    发明专利
    未知

    公开(公告)号:DE1224285B

    公开(公告)日:1966-09-08

    申请号:DEB0072039

    申请日:1963-05-24

    Applicant: BASF AG

    Abstract: An anode of an alkali metal chloride electrolytic cell having a horizontal cathode, preferably of mercury, is adjusted, e.g. to lower the graphite anode plate 2 towards the cathode, by rotating a support member 4 resting loosely on the cell cover 6, which member carries or has formed therein a nut 5 engaging a screw thread 3 on the upper end of the anode shaft 1 which, where it passes through the cover, is sealed by a plug 8 of elastomeric material such as rubber having a central opening provided with grooves or a labyrinth. The opening in the cell cover may have an upwardly directed flange 7; the upper portion of the plug may be extended to form a collar (see Fig.4, not shown) turned over the flange. The screwthreads of the shaft 1 and nut 5 may be of metal and graphite respectively, or vice versa.

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