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    2.
    发明专利
    未知

    公开(公告)号：FI63021C

    公开(公告)日：1983-04-11

    申请号：FI761185

    申请日：1976-04-28

    Applicant: DEGUSSA ,  BAYER AG

    Inventor： PRESCHER GUENTER ,  SCHREYER GERD ,  WEIBERG OTTO ,  WIRTHWEIN ROLF ,  WALDMANN HELMUT ,  SEIFERT HERMANN ,  SCHWERDTEL WULF ,  SWODENK WOLFGANG

    IPC: C07C67/00 ,  C07C407/00 ,  C07C409/24 ,  C07C179/10

    Abstract: Process for continuous production of substantially anhydrous solutions of perpropionic acid in benzene. Aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid and water (1). The perpropionic acid is extracted with benzene (5), to provide a benzene phase containing the perpropionic acid (11) and an aqueous raffinate (7). The benzene phase is subjected to an extraction with water (12) involving at least 3 stages, to remove hydrogen peroxide, and the resulting benzene extract (15) is subjected to azeotropic distillation (26) to provide the anhydrous solution (17). The aqueous raffinate, which contains hydrogen peroxide, is distilled to remove water (8) and the resulting concentrate is recycled (2) for use in the reaction (1).

    3.
    发明专利
    未知

    公开(公告)号：NO146709B

    公开(公告)日：1982-08-16

    申请号：NO761470

    申请日：1976-04-28

    Applicant: BAYER AG ,  DEGUSSA

    Inventor： PRESCHER GUENTER ,  SCHREYER GERD ,  WEIBERG OTTO ,  WIRTHWEIN ROLF ,  WALDMANN HELMUT ,  SEIFERT HERMANN ,  SCHWERDTEL WULF ,  SWODENK WOLFGANG

    IPC: C07C409/24 ,  C07D301/14

    Abstract: Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5 , 12), and following drying of the benzene solution (16), the perpropionic acid in the solution is reacted with propylene (18) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (25, 27, 31, 33), and the latter two are recycled. In the benzene extraction (5, 12), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. Water is removed from the aqueous raffinate (8) and the concentrate is recycled to the propionic acid reactor. Make-up hydrogen peroxide can be added to the aqueous raffinate before the removal of water.

    4.
    发明专利
    未知

    公开(公告)号：FI62076B

    公开(公告)日：1982-07-30

    申请号：FI761184

    申请日：1976-04-28

    Applicant: BAYER AG ,  DEGUSSA

    Inventor： WALDMANN HELMUT ,  SEIFERT HERMANN ,  SCHWERDTEL WULF ,  SWODENK WOLFGANG ,  PRESCHER GUENTER ,  SCHREYER GERD ,  WEIBERG OTTO ,  WIRTHWEIN ROLF

    IPC: C07C409/24 ,  C07D301/14 ,  C07C178/00

    Abstract: Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5 , 12), and following drying of the benzene solution (16), the perpropionic acid in the solution is reacted with propylene (18) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (25, 27, 31, 33), and the latter two are recycled. In the benzene extraction (5, 12), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. Water is removed from the aqueous raffinate (8) and the concentrate is recycled to the propionic acid reactor. Make-up hydrogen peroxide can be added to the aqueous raffinate before the removal of water.

    PROCESS FOR PRODUCING NON-AQUEOUS HYDROGEN PEROXIDE SOLUTIONS
    8.
    发明专利
    PROCESS FOR PRODUCING NON-AQUEOUS HYDROGEN PEROXIDE SOLUTIONS 未知

    公开(公告)号：CA1206741A

    公开(公告)日：1986-07-02

    申请号：CA449245

    申请日：1984-03-09

    Applicant: DEGUSSA

    Inventor： DRAUZ KARLHEINZ ,  KLEEMANN AXEL ,  WIRTHWEIN ROLF

    IPC: C01B15/017

    Abstract: The production of hydrogen peroxide solutions extremely low in water in higher boiling solvents by mixing hydrogen peroxide solutions in solvents whose azeotrope boiling points with water lie below the boiling point of hydrogen peroxide with higher boiling solvents which at best form azeotropes with water whose boiling points lie close to or above the boiling point of hydrggen peroxide. The mixture is then freed from water and from the lower boiling solvents by distillation. An in situ method for producing the above mixture is described.

    10.
    发明专利
    未知

    公开(公告)号：FI62076C

    公开(公告)日：1982-11-10

    申请号：FI761184

    申请日：1976-04-28

    Applicant: BAYER AG ,  DEGUSSA

    Inventor： WALDMANN HELMUT ,  SEIFERT HERMANN ,  SCHWERDTEL WULF ,  SWODENK WOLFGANG ,  PRESCHER GUENTER ,  SCHREYER GERD ,  WEIBERG OTTO ,  WIRTHWEIN ROLF

    IPC: C07C409/24 ,  C07D301/14 ,  C07C178/00

    Abstract: Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5 , 12), and following drying of the benzene solution (16), the perpropionic acid in the solution is reacted with propylene (18) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (25, 27, 31, 33), and the latter two are recycled. In the benzene extraction (5, 12), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. Water is removed from the aqueous raffinate (8) and the concentrate is recycled to the propionic acid reactor. Make-up hydrogen peroxide can be added to the aqueous raffinate before the removal of water.

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