2.
    发明专利
    未知

    公开(公告)号:SE7610871L

    公开(公告)日:1977-04-02

    申请号:SE7610871

    申请日:1976-09-30

    Applicant: BASF AG

    Abstract: Fabrics of which the warp is sized with water-soluble polymers of acrylic acid and/or their alkali metal salts or ammonium salts, are desized by treating the sized fabric with from 30 to 300 percent by weight of water, based on the dry weight of the fabric, and separating the resulting size solution from the fabric. The recovered size solution can be directly re-used for sizing.

    7.
    发明专利
    未知

    公开(公告)号:BR7100735D0

    公开(公告)日:1973-06-12

    申请号:BR73571

    申请日:1971-01-29

    Applicant: BASF AG

    Inventor: WOLF H STORCK G MARX M

    8.
    发明专利
    未知

    公开(公告)号:SE340613B

    公开(公告)日:1971-11-29

    申请号:SE799969

    申请日:1969-06-05

    Applicant: BASF AG

    Inventor: WOLF H GOESELE W

    Abstract: A fluidized-bed method of roasting sulfidic materials containing arsenic and/or antimony with a gas containing oxygen with separate supply of the gas containing oxygen for the preroasting in a first stage and for the afterroasting in the second stage and with separate withdrawal of the roaster gas from the preroasting stage and from the afterroasting stage. The dusty portion of the roasted intermediate product from the first stage is introduced periodically into the fluidized bed of the second stage and, in timed relationship with this periodic introduction of the roasted intermediate product, air is periodically introduced into the gas space above the fluidized bed in the second layer in such an amount that it is adequate for complete roasting of the dusty roasted intermediate products suspended in this gas space.

    10.
    发明专利
    未知

    公开(公告)号:BR6909692D0

    公开(公告)日:1973-05-03

    申请号:BR20969269

    申请日:1969-06-12

    Applicant: BASF AG

    Inventor: WOLF H GOESELE W

    Abstract: A fluidized-bed method of roasting sulfidic materials containing arsenic and/or antimony with a gas containing oxygen with separate supply of the gas containing oxygen for the preroasting in a first stage and for the afterroasting in the second stage and with separate withdrawal of the roaster gas from the preroasting stage and from the afterroasting stage. The dusty portion of the roasted intermediate product from the first stage is introduced periodically into the fluidized bed of the second stage and, in timed relationship with this periodic introduction of the roasted intermediate product, air is periodically introduced into the gas space above the fluidized bed in the second layer in such an amount that it is adequate for complete roasting of the dusty roasted intermediate products suspended in this gas space.

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