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    3.
    发明专利
    未知

    公开(公告)号：DE3822783A1

    公开(公告)日：1990-01-11

    申请号：DE3822783

    申请日：1988-07-06

    Applicant: BASF AG

    Inventor： HEMEL RALF ,  MELZER JAROSLAV

    IPC: D21F7/06 ,  D21H23/08 ,  D21H23/12

    Abstract: The maximum amounts of the retention-influencing variable stock components which can be added are determined as a function of a predetermined degree of flocculation and typical values of the stock suspension with the aid of a mathematical relationship, and control signals for metering retention aids are derived from the amounts so that the greatest possible retention can be achieved without exceeding a set-point for the degree of flocculation.

    5.
    发明专利
    未知

    公开(公告)号：NO885826D0

    公开(公告)日：1988-12-30

    申请号：NO885826

    申请日：1988-12-30

    Applicant: BASF AG

    Inventor： CLERCQ ARNOLD DE ,  BERGOLD WOLFRAM ,  DEGEN HANS-JUERGEN ,  MELZER JAROSLAV

    IPC: B01D19/04 ,  B01F17/00

    Abstract: Defoamers in which the oil phase of the emulsions contains… (a) a C12- to C26-alcohol, distillation residues obtainable during the production of alcohols with a relatively high carbon number by oxo synthesis or by the Ziegler process and which may also be alkoxylated, and/or… (b) a fatty acid ester of C12- to C22- carboxylic acids with a mono- to tri-hydric C1- to C18-alcohol and optionally… (c) a hydrocarbon having a boiling point above 200 DEG C or fatty acids having 12 to 22 carbon atoms,… comprises 5 to 50% by weight of the make-up of the emulsion and has a mean particle size of less than 25 mu m, and in which 5 to 50 % by weight of the components (a) and (b) of the oil phase are replaced by… (d) at least one compound melting at a temperature above 70 DEG C selected from the group of fatty alcohols having at least 28 C atoms, the esters of a C1- to C22-carboxylic acid with an alcohol having at least 28 C atoms, the polyethylene waxes having a molecular weight of at least 2000, the carnauba waxes, the montanic ester waxes and the montanic acid waxes and their salts.

    6.
    发明专利
    未知

    公开(公告)号：DE3401695A1

    公开(公告)日：1985-08-01

    申请号：DE3401695

    申请日：1984-01-19

    Applicant: BASF AG

    Inventor： BERGOLD WOLFRAM DR ,  MELZER JAROSLAV

    IPC: B01D19/04

    Abstract: In antifoams based on oil-in-water emulsions, the oil phase of the emulsion contains (a) C12-C26-alcohols, distillation residues obtained in the preparation of alcohols by an oxosynthesis or by the Ziegler process and/or (b) fatty acid esters of C12-C22-carboxylic acids with monohydric, dihydric or trihydric C1-C18-alcohols, with or without (c) a hydrocarbon having a boiling point above 200 DEG C. or fatty acids of 12 to 22 carbon atoms, constitutes from 15 to 60% by weight of the emulsion and has a mean droplet size of from 0.5 to 15 mu m. The emulsions are stabilized by the addition of from 0.05 to 0.5% by weight, based on the total emulsion, of a high molecular weight water-soluble homopolymer or copolymer of acrylic acid, methacrylic acid, acrylamide or methacrylamide.

    7.
    发明专利
    未知

    公开(公告)号：NO152374B

    公开(公告)日：1985-06-10

    申请号：NO802543

    申请日：1980-08-28

    Applicant: BASF AG

    Inventor： HERTEL OTTO ,  SCHARF EMIL ,  MELZER JAROSLAV ,  FIKENTSCHER ROLF

    IPC: C08G69/48 ,  D21H17/55 ,  C08G81/00 ,  D21H17/56 ,  D21H3/58

    Abstract: Process for the production of water-soluble auxiliaries for the papermaking industry by reacting (a) 1 part by weight of a polyamidoamine obtained by condensing 1 mole of a dicarboxylic acid having from 4 to 10 carbon atoms with from 0.8 to 1.4 moles of a polyalkylene polyamine having from 3 to 10 alkyleneamine units and containing up to 8 ethyleneimine units per basic nitrogen atom with (b) 0.1 to 4 parts by weight of an alpha , omega -dichloro polyalkylene oxide obtained by reacting a polyalkylene oxide having from 8 to 100 alkylene oxide units with a compound selected from the group consisting of a thionyl chloride and phosgene and then cleaving the reaction products by heating them to a temperature of from 70 DEG to 150 DEG C. in the presence of a tertiary amine as catalyst, as crosslinking agent, at a temperature above 20 DEG C. in aqueous solution or in a water-soluble organic solvent, the reaction being carried out to a point at which the viscosity of an aqueous solution containing 20% by weight of auxiliary is from 300 to 2,500 mPas.

    9.
    发明专利
    未知

    公开(公告)号：DE19715832A1

    公开(公告)日：1998-10-22

    申请号：DE19715832

    申请日：1997-04-16

    Applicant: BASF AG

    Inventor： LINHART FRIEDRICH DR ,  MELZER JAROSLAV ,  MEIXNER HUBERT DR

    IPC: D21H17/56 ,  D21H21/02 ,  D21C9/08 ,  D21H17/33

    Abstract: The invention relates to a method for producing, paper, pulpboard and cardboard from paper pulp containing sticky impurities by adding surfactants and cationic polymers with a load density of at least 1.5 meq/g (measured at pH 7) and a cationic polymer molar mass Mw of at least 15,000, and by dehydrating the pulp and fixing the sticky impurities in the finished paper.

    10.
    发明专利
    未知

    公开(公告)号：DE3873714D1

    公开(公告)日：1992-09-17

    申请号：DE3873714

    申请日：1988-12-24

    Applicant: BASF AG

    Inventor： DE CLERCQ ARNOLD DR ,  BERGOLD WOLFRAM DR ,  DEGEN HANS-JUERGEN DR ,  MELZER JAROSLAV

    IPC: B01D19/04

    Abstract: Antifoam based on oil-in-water emulsions has an oil phase contg. (a) a 12-26C alcohol, distn. residues from the prodn. of higher alcohols by Oxo synthesis or the Ziegler process and opt. alkoxylated and/or (b) a fatty ester of 12-22C carboxylic acids with a mono- to trihydric 1-18C alcohol; and opt. (c) a hydrocarbon with b.pt. above 200 deg.C or 12-22C fatty acids. This comprises 5-50 (wt.)% of the emulsion and has an average particle size of under 25 microns. The novelty is that 5-50% of components (a) and (b) in the oil phase are replaced by (d) at least one cpd. with m.pt. above 70 deg.C, consisting of fatty alcohols (I) with min. 28C, esters (II) of 1-22C carboxylic acids with (I), adducts of 2-4C alkylene oxides with (I), polyethylene waxes (III) with mol.wt. min. 2000, carnauba wax (IV) and/or montan ester waxes (VA) and montan acid waxes (VB) and their salts (VC).

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