5.
    发明专利
    未知

    公开(公告)号:DE3908008A1

    公开(公告)日:1990-04-12

    申请号:DE3908008

    申请日:1989-03-11

    Applicant: HOECHST AG

    Abstract: A surfactant composition which consists of 70% by weight of water and 30 to 85% by weight of an anionic surfactant and a particular cationic surfactant in the molar ratio 1:(0.3 to 10) is described. The surfactant compositions are in the form of a clear and easily handled liquid. A method to produce these surfactant compositions is also described, and essentially comprises mixing together the three components of water, anionic surfactant and cationic surfactant with the formation of two phases, and separating the upper required surfactant phase from the lower salt phase. The surfactant composition has wide utility because of its advantageous properties.

    6.
    发明专利
    未知

    公开(公告)号:DE2445873A1

    公开(公告)日:1976-04-08

    申请号:DE2445873

    申请日:1974-09-26

    Applicant: HOECHST AG

    Abstract: 1500825 Demulsifying crude oil emulsions HOECHST AG 24 Sept 1975 [26 Sept 1974] 39095/75 Heading C5E [Also in Division C3] A process for the separation of water from crude oil emulsions comprises adding to the stationary or flowing emulsion from 2 to 100 p.p.m. of a demulsifying agent which is a condensation product that has been prepared by (a) preparing an addition product of an aliphatic aldehyde, preferably formaldehyde, and phenol in a molar ratio of from 1:1 to 3:1 at a temperature of from 50‹ to 80‹ C. in the presence of an alkaline catalyst; (b) preparing a block copolymer from a polypropylene glycol having a molecular weight from 1500 to 2500 by the addition of from 30 to 50% by weight of ethylene oxide in the presence of an alkaline catalyst; and (c) condensing from 0À5 to 4 moles of addition product (a) with 1 mole of block copolymer (b), after neutralization, with an acid, if necessary in the presence of an inert solvent at from 80‹ to 150‹ C., and simultaneously removing the water formed. The demulsifying agent used may be dissolved in water and/or an organic solvent.

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