中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

93 records (took 0.024 seconds)

    AQUEOUS SURFACTANT FORMULATIONS BASED ON PROTEIN/FATTY ACID CONDENSATES AND THEIR USE IN CRUDE OIL PRODUCTION
    1.
    发明专利
    AQUEOUS SURFACTANT FORMULATIONS BASED ON PROTEIN/FATTY ACID CONDENSATES AND THEIR USE IN CRUDE OIL PRODUCTION 未知

    公开(公告)号：CA2007817A1

    公开(公告)日：1990-07-17

    申请号：CA2007817

    申请日：1990-01-16

    Applicant: HOECHST AG

    Inventor： HOLST ARNO ,  MILLER DENNIS

    IPC: C09K8/584 ,  C09K23/00 ,  C09K23/30 ,  B01F17/12 ,  E21B43/16 ,  E21B43/22 ,  B01F17/30

    Abstract: of the disclosure Aqueous surfactant formulations based on protein/fatty acid condensates and their use in crude oil production Aqueous surfactant formulations, containing a surfactant mixture composed of: a) 2 to 95 %, preferably 20 to 80 %, of a protein/fatty acid condensate obtained by reacting 1 mole of a protein of the formula in which R is the radical of an amino acid, m is an alkali metal ion or ammonium ion and n is a number from 0 to 50, preferably from 2 to 33, with 0.5 to 4 moles of a fatty acid chloride of the formula R1-CO CL in which R1 is C7-C21-alkyl or C7-C21-alkenyl, b) 5 to 98 %, preferably 20 to 80 %, of a hydrocarbon-sulfonate and c) 0 to 80 % of an alkoxylated surfactant. These surfactant mixtures are used in surfactant flooding for increasing the yield in crude oil production.

    WATER-SOLUBLE CELLULOSE MIXED ETHERS WHICH CONTAIN A PHOSPHONOMETHYL SUBSTITUENT AND A PROCESS FOR PREPARING SAME
    3.
    发明专利
    WATER-SOLUBLE CELLULOSE MIXED ETHERS WHICH CONTAIN A PHOSPHONOMETHYL SUBSTITUENT AND A PROCESS FOR PREPARING SAME 未知

    公开(公告)号：CA1174234A

    公开(公告)日：1984-09-11

    申请号：CA387481

    申请日：1981-10-07

    Applicant: HOECHST AG

    Inventor： BRANDT LOTHAR ,  HOLST ARNO

    IPC: C08B11/193

    Abstract: Disclosed are water-soluble cellulose mixed ethers which contain a) at least one substituent from the group comprising alkyl, hydroxyalkyl, carboxyalkyl, sulfoalkyl and dialkylaminoalkyl and b) a phosphonomethyl substituent and which has a DS of the first substituent (s) other than hydroxyalkyl from about 0.05 to 2.95 and/or an MSHAlk from about 0.5 to 6 and a DSPM from about 0.005 to 0.8. Also disclosed is a process for preparing such cellulose mixed ethers in which, per mole of the cellulose, from about 0.1 to 25 moles of the etherifying agent(s) for producing the substituent(s) under a), from about 0.05 to 2 moles of halogenomethane phosphonate ions as the etherifying agent for producing the substituent under b) and from about 0.8 to 12 moles of hydroxide ions are caused to react in a reaction mixture comprising up to about 30 parts by weight, per part by weight of the cellulose, of a mixture which is composed of an inert, preferably water-miscible organic solvent and H2O and in which the proportion of water ranges from about 3 to 40 percent by weight.

    4.
    发明专利
    未知

    公开(公告)号：NO821071L

    公开(公告)日：1982-10-01

    申请号：NO821071

    申请日：1982-03-30

    Applicant: HOECHST AG

    Inventor： BRANDT LOTHAR ,  HOLST ARNO

    IPC: C08K3/00 ,  C08L1/28 ,  E21B43/22 ,  E21B

    Abstract: The application discloses a gel-forming composition based on (a) water, (b) a water-soluble cellulose mixed ether having at least one nonionic substituent from the group comprising hydroxyalkyl and alkyl and at least one anionic phosphorus-containing substituent, and (c) a salt containing a cation which is at least divalent. The phosphorus-containing substituent is a phosphonoalkyl group or a p-alkylphosphinoalkyl group. The application also relates to a process for the preparation of a gel from this composition, to the reversible reversing of the gel by the addition of an agent which complexes the cation, e.g. in the case of Al3+ ions, Fe3+ ions, Zr4+ ions or ZrO2+ ions, by means of an amount of fluoride ions, and to the use of this gel-forming compostion in the secondary production of petroleum.

    5.
    发明专利
    未知

    公开(公告)号：NO821071A

    公开(公告)日：1982-10-01

    申请号：NO821071

    申请日：1982-03-30

    Applicant: HOECHST AG

    Inventor： BRANDT LOTHAR ,  HOLST ARNO

    IPC: C08K3/00 ,  E21B

    CPC classification number: C08K3/10 ,  C08L1/28

    Abstract: The application discloses a gel-forming composition based on (a) water, (b) a water-soluble cellulose mixed ether having at least one nonionic substituent from the group comprising hydroxyalkyl and alkyl and at least one anionic phosphorus-containing substituent, and (c) a salt containing a cation which is at least divalent. The phosphorus-containing substituent is a phosphonoalkyl group or a p-alkylphosphinoalkyl group. The application also relates to a process for the preparation of a gel from this composition, to the reversible reversing of the gel by the addition of an agent which complexes the cation, e.g. in the case of Al3+ ions, Fe3+ ions, Zr4+ ions or ZrO2+ ions, by means of an amount of fluoride ions, and to the use of this gel-forming compostion in the secondary production of petroleum.

Patent Agency Ranking