Removal of malodorous organic cpds. from dispersion

    公开(公告)号:DE19624299A1

    公开(公告)日:1997-01-02

    申请号:DE19624299

    申请日:1996-06-18

    Applicant: BASF AG

    Abstract: In a process and assembly to remove malodorous organic cpds. esp. aq. polymer dispersions, from a dispersion, the (a) the dispersion (1) and a gas (6) are introduced into a vessel (3) which rotates about an axis (5), such that the gas flows against the dispersion in the rotating vessel; (b) and all the corners and edges inside the vessel (3) and within the fluid flow zones are rounded off. A further variant has a rotating inner vessel (3) with permeable walls sepd. by a gap (12) from an outer vessel (4). The gas (6) is introduced to the gap and migrates through the permeable walls (20) into the inner vessel chamber, while the dispersion flows against the direction of gas flow, into the gap (12).

    16.
    发明专利
    未知

    公开(公告)号:DE19511130A1

    公开(公告)日:1996-10-02

    申请号:DE19511130

    申请日:1995-03-27

    Applicant: BASF AG

    Abstract: A method is claimed for using cationically stabilised aq. polymer dispersions (PD) as binders for moulded prods. based on finely divided materials with a negative surface charge (M). These dispersions contain (A) a dispersed copolymer (A) with a static Tg of 40-110 deg. C, based on (a) 30-80 pts. wt. styrene, (b) 20-70 pts. wt. (1-8C alkyl) (meth)acrylate(s) and (c) 0-10 pts. wt. other radically copolymerisable monomers, and (B) as dispersant, a mixt. of prim., sec. and/or tert. organic mono-amine(s) with at least 8 C atoms and acid addn. salts thereof. Also claimed are (i) polymer dispersions (PD) as above; (ii) moulded prods. based on materials (M) and binders (PD); (iii) rectangular moulded sheets based on (M) and (PD), with a length and breadth of 30-70 cm and a thickness of 1-20 mm; (iv) a process for the prodn. of mouldings (ii), by suspending material (M) in water, adding dispersion (PD), precipitating copolymer (A) onto material (M) by adding bases or salts of multivalent anions, placing the mixt. obtd. in a mould, removing water, and drying; (v) moulded prods. obtd. by this process.

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