21.
    发明专利
    未知

    公开(公告)号:DE3514924A1

    公开(公告)日:1986-10-30

    申请号:DE3514924

    申请日:1985-04-25

    Applicant: BASF AG

    Abstract: Solutions of molecular oxygen in liquid hydrocarbons are prepared by bringing a liquid hydrocarbon into contact with molecular oxygen under superatmospheric pressure in a vertical absorption zone, by a process in which (a) a layer of water is maintained at the lower end of the absorption zone, (b) molecular oxygen is passed into the layer of water, (c) a liquid hydrocarbon is fed in above the layer of water, (d) the finely divided molecular oxygen rising from the layer of water is passed upward together with the liquid hydrocarbon at from 0 DEG to 50 DEG C., with thorough mixing in the absorption zone, with the proviso that no cohesive gas phase is formed, and (e) the solution of molecular oxygen in the liquid hydrocarbon is discharged in the upper part of the absorption zone.

    23.
    发明专利
    未知

    公开(公告)号:NO315599B1

    公开(公告)日:2003-09-29

    申请号:NO960820

    申请日:1996-02-28

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP94/02822 Sec. 371 Date Feb. 29, 1996 Sec. 102(e) Date Feb. 29, 1996 PCT Filed Aug. 25, 1994 PCT Pub. No. WO95/06617 PCT Pub. Date Mar. 9, 1995Hydrophobic silica aerogels obtainable by reacting a waterglass solution with an acid at a pH of from 7.5 to 11, substantially removing ionic constituents from the resulting silica hydrogels by washing with water or dilute aqueous solutions of inorganic bases, while the pH of the hydrogels is kept in the range from 7.5 to 11, displacing the aqueous phase contained in the hydrogel by an alcohol, and subsequent supercritical drying of the resulting alcogels.

    26.
    发明专利
    未知

    公开(公告)号:DE59405045D1

    公开(公告)日:1998-02-19

    申请号:DE59405045

    申请日:1994-08-25

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP94/02822 Sec. 371 Date Feb. 29, 1996 Sec. 102(e) Date Feb. 29, 1996 PCT Filed Aug. 25, 1994 PCT Pub. No. WO95/06617 PCT Pub. Date Mar. 9, 1995Hydrophobic silica aerogels obtainable by reacting a waterglass solution with an acid at a pH of from 7.5 to 11, substantially removing ionic constituents from the resulting silica hydrogels by washing with water or dilute aqueous solutions of inorganic bases, while the pH of the hydrogels is kept in the range from 7.5 to 11, displacing the aqueous phase contained in the hydrogel by an alcohol, and subsequent supercritical drying of the resulting alcogels.

Patent Agency Ranking