中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

25 records (took 0.021 seconds)

    Process for reducing the surface tension of aqueous solutions
    1.
    发明专利
    Process for reducing the surface tension of aqueous solutions 未知

    公开(公告)号：DE3533806A1

    公开(公告)日：1987-03-26

    申请号：DE3533806

    申请日：1985-09-21

    Applicant: HOECHST AG

    Inventor： STUEHLER HERBERT DR

    IPC: A01N25/30 ,  C09K23/00 ,  C09K23/42 ,  B01F17/42

    Abstract: In the new process, certain reaction products of polyglycerol (polyglycerin) and fatty acid are used to lower the surface tension of aqueous solutions of organic or inorganic salts. The reaction products are ones which are obtained if a polyglycerol having a hydroxyl number (hydroxyl index) from 860 to 800 is esterified under acid catalysis with a fatty acid in a molar ratio of 1:0.3 to 0.7 until a hydroxyl number from 770 to 680 and an acid number (acid index) of at most 0.7 are reached. The proposed esterification products are added to the solutions (compositions) to be treated in an effective amount which is generally an amount from 0.005 to 10 % by weight, based on the weight of the solution (composition).

    Method for reducing the surface tension of aqueous solutions
    2.
    发明专利
    Method for reducing the surface tension of aqueous solutions 未知

    公开(公告)号：DE3446720A1

    公开(公告)日：1986-06-26

    申请号：DE3446720

    申请日：1984-12-21

    Applicant: HOECHST AG

    Inventor： STUEHLER HERBERT DR ,  ULTSCH-UNRATH GERHARD

    IPC: C08G65/34 ,  C08G65/48 ,  C09K23/00 ,  C09K23/52 ,  B01F17/52 ,  C08G65/46

    Abstract: In the novel method, the aqueous solutions of organic or inorganic salts are admixed, in order to reduce surface tension, with a reaction product from polyglycerol and fatty acid, which product has been obtained by (a) first condensing glycerol under normal pressure up to a hydroxyl value of from 1350 to 1100, (b) distilling the condensation product obtained in step (a), in order to remove low-boiling compounds, at a vacuum of from 50 to 2000 Pa until the bottom product has a hydroxyl value of from 1050 to 900, (c) further condensing at atmospheric pressure, the bottom product obtained in step (b) up to a hydroxyl value of from 890 to 800 and (d) esterifying the polyglycerol mixture obtained in step (c) up to a hydroxyl value of from 800 to 750 and an acid value of at most 0.7.

    4.
    发明专利
    未知

    公开(公告)号：BR9105359A

    公开(公告)日：1992-08-25

    申请号：BR9105359

    申请日：1991-12-12

    Applicant: HOECHST AG

    Inventor： FRUTH ANTON ,  STRAUSS JULIUS ,  STUEHLER HERBERT DR

    IPC: B01J25/02 ,  C07B61/00 ,  C07C209/48 ,  C07C209/70 ,  C07C211/03 ,  C07C211/07

    Abstract: According to the new process, the hydrogenation of unsaturated fatty acid nitriles or mixtures of unsaturated and saturated fatty acid nitriles is carried out in the liquid phase in the presence of nickel catalysts or cobalt catalysts. In a first reaction step the fatty acid nitrile, in the presence of ammonia, is treated with hydrogenation hydrogen until all the nitrile groups are hydrogenated to predominantly primary amino groups. After the ammonia content in the reaction mixture obtained from the first step has been adjusted to a value of at most 0.1 mol of ammonia per mole of fatty acid nitrile used, a second reaction step is used to hydrogenate the double bonds present to saturated bonds. The desired primary and saturated fatty amine is obtained in a very high yield and has an iodine number of at most 5.

    5.
    发明专利
    未知

    公开(公告)号：DE3421217A1

    公开(公告)日：1985-09-05

    申请号：DE3421217

    申请日：1984-06-07

    Applicant: HOECHST AG

    Inventor： BILLENSTEIN SIEGFRIED DR ,  KUKLA BRUNO ,  STUEHLER HERBERT DR

    IPC: C11C3/10 ,  C07C67/03 ,  C07C69/003 ,  C11C3/04 ,  C07C67/02

    Abstract: A process for the preparation of fatty acid esters of short-chain primary and secondary alcohols with 1 to 5 carbon atoms by transesterification of glycerides with the said short-chain alcohols is described. In this process, a stream of the gaseous alcohol is passed through the liquid glyceride at temperatures of at least 210 DEG C. and the product mixture of gylcerol and fatty acid alkyl ester is discharged from the reaction zone with this stream and is then subjected to phase separation.

    6.
    发明专利
    未知

    公开(公告)号：DE3639857A1

    公开(公告)日：1988-06-01

    申请号：DE3639857

    申请日：1986-11-21

    Applicant: HOECHST AG

    Inventor： STUEHLER HERBERT DR ,  FISCHER KURT

    IPC: C07C29/00 ,  C07B61/00 ,  C07C27/00 ,  C07C31/22 ,  C07C67/00 ,  C07C253/00 ,  C07C253/22 ,  C07C255/00 ,  C07C255/03 ,  C07C255/17 ,  C07C121/16 ,  C07C120/00

    Abstract: Glycerides are reacted with ammonia in an amount of at least 200 liters per kilogram of glyceride per hour, at a temperature of 220 DEG to 300 DEG C., and in the presence of special catalysts. Of the product mixture which is formed and removed from the reaction with the excess ammonia, and which is composed essentially of the components water, the desired glycerol and fatty acid nitrile containing fatty acid and fatty acid amide, the latter component is returned to the reaction during the glyceride reaction. After completion of the glyceride reaction, which is indicated when the product mixture contains virtually no more glycerol, all the fatty acid nitrile containing fatty acid and fatty acid amide is further treated, in an after-reaction with a reduced amount of ammonia and at higher temperature, in order to convert the fatty acid and fatty acid amide impurities into fatty acid nitrile.

Patent Agency Ranking