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公开(公告)号：DE3118192A1
公开(公告)日：1982-11-25
申请号：DE3118192
申请日：1981-05-08
Applicant: BASF AG
Inventor： MELZER JAROSLAV DIPL ING , AUHORN WERNER DIPL ING
IPC: D21C5/02
Abstract: Process for de-inking waste paper by defibration of the waste paper in water to a stock consistency of 1 to 8 % by weight at a temperature from 40 to 90 DEG C in the presence of alkali, wetting agent and flotation aid, residence time of the mixture in the vat, flotation and, if necessary, conventional bleaching of the fibre material, the defibration being carried out in the absence of waterglass, and 0.1 to 2.0 % by weight of a reducing agent, relative to the dry weight of the waste paper, being added at a pH of 8.5 to 12 before the completion of defibration or after this.
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公开(公告)号：DE2916356A1
公开(公告)日：1980-11-13
申请号：DE2916356
申请日：1979-04-23
Applicant: BASF AG
Inventor： STREIT WERNER DIPL CHEM DR , FIKENTSCHER ROLF DIPL CHEM DR , MELZER JAROSLAV DIPL ING , SCHARF EMIL DIPL CHEM DR , KOLHAUPT REINHOLD DIPL CHEM DR
Abstract: Polyetheramine are prepd. by condensing di- or polyamines (I) contg. 2-10 N atoms wich chlorohydrin ethers (II) prepd. from 1 mol divalent 2-5C alcohol, the ethoxylated adduct contg. up to 18 ethylene oxide units, glycerol or polyglycerol contg. up to 15 glycerol units and 2-8 mol epichlorohydrin at 110-200 degrees C in polar, water miscile solvents in the absence or extensive exclusion of water, adding an alkali(ne earth) metal base to neutralise >=20% of the HCl formed by the condensn. and post-condensing (I) is used in an amt. of 0.6-2.5 mol per mol. chlorohydrin gp. in (II). The aids are prepd. withou the necessity of having to graft components used during the condensn. with ethylene imine.
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公开(公告)号：DE2547966A1
公开(公告)日：1977-05-05
申请号：DE2547966
申请日：1975-10-27
Applicant: BASF AG
Inventor： PETERSEN HARRO DIPL CHEM DR , MELZER JAROSLAV DIPL ING , HUMMERICH RAINER DIPL CHEM DR , ROHMANN MICHAEL DIPL CHEM DR
Abstract: New water-insoluble urea-HCHO polycondensates contain methyolated urone gps. having formula (I): The polycondensates are prepd. by reacting HCHO and urea and/or their addn. or condensn. prods. starting with mol. ratio >=3:1 at pH 3 and 50-100 degrees C. Reaction is continued until >=15 wt.% of urea is present as urone gps. Urea and opt. aminoplast-forming cpds. are then added. Reaction prod. is allowed to react at pH >5 and then pptd. as an insoluble condensate, at pH 5. They are used as pigments and fillers, as range spacers for carbon papers and as sedimentation agents for suspended fibre particles in paper machine waste waters. When used as space rangers, prods. cause min. soiling of acceptor layer yet produce a strong lettering on typing. As white pigments, 20% prod. added to bleached sulphite pulp can improve degree of whiteness from 84.7 to 88.9 at pH 7.
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公开(公告)号：DE2533108A1
公开(公告)日：1977-02-10
申请号：DE2533108
申请日：1975-07-24
Applicant: BASF AG
Inventor： MELZER JAROSLAV DIPL ING
Abstract: Method comprises dilution of H2O-in-oil emulsion of the polymer with H2O so as to cause inversion and soln of the polymer H2O-in-oil emulsion and H2O in a wt. ratio of 1:8 to 1:100 are continuously introduced into a mixing zone so that the flow speed of the H2O lies within the range giving turbulence. The mixt. is then led out of the mixing zone through one or more apertures again at a speed which causes turbulence. The mixt. is allowed to remain in the next zone for a time and is finally diluted with more H2O in known manner. The process is effected continuously and is not affected by the presence of salts which in previous processes caused deposition of material. In an example, H2O at 1 litre/min and 70:30 acrylamide-diethylaminoethylacrylate copolymer in 22 wt. % H2O-in-oil emulsion at 25 ml/min. were pumped through narrow jets into a 10 cm3 mixing zone followed by a waiting zone and a 5 litre mixer. A stable soln of viscosity 620 mPa.s was obtd.
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Patent Agency Ranking
公开(公告)号：DE3566386D1
公开(公告)日：1988-12-29
申请号：DE3566386
申请日：1985-02-15
Applicant: BASF AG
Inventor： APPL MAX DR , GOESELE EILHELM DR , MELZER JAROSLAV DIPL ING , SCHREINER SIEGFRIED DR , TREIBER GERT DR
Abstract: Stabilized water-containing sodium dithionite formulations which have been rendered alkaline have the consistency of a pumpable paste. They additionally contain readily soluble sodium salts and/or potassium salts which are inert to sodium dithionite and whose water-solubility at 20 DEG C. exceeds 500 g/l. These salts are present in the aqueous phase in an amount of not less than 200 g/l. The pastes are useful reducing agents.
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公开(公告)号：DE3007328A1
公开(公告)日：1981-09-10
申请号：DE3007328
申请日：1980-02-27
Applicant: BASF AG
Inventor： MELZER JAROSLAV DIPL ING , WEISS GREGOR
IPC: G01N23/203 , G01N33/34 , G01B15/02 , G01G9/00 , G01N23/08
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公开(公告)号：DE2934854A1
公开(公告)日：1981-09-10
申请号：DE2934854
申请日：1979-08-29
Applicant: BASF AG
Inventor： HERTEL OTTO DIPL CHEM DR , SCHARF EMIL DIPL CHEM DR , MELZER JAROSLAV DIPL ING , FIKENTSCHER ROLF DIPL CHEM DR
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.
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公开(公告)号：DE2514138A1
公开(公告)日：1976-10-14
申请号：DE2514138
申请日：1975-03-29
Applicant: BASF AG
IPC: C08F20/56
Abstract: A process for preparing sedimentation stable acrylamide polymer (I) water in oil dispersions by polymerising a water in oil emulsion of an aq. acrylamide soln. opt. contg. =50 wt. % of other water soluble monomers in a hydrophobic organic dispersion medium (II) in the presence of an emulsifier and an initiator is characterised in that (II) is a mixt. of a liquid hydrocarbon and a chloroparaffin having a density deviating is not >0.2 kg/m3 from that of the dispersed aq. phase. The dispersion is sedimentation stable and may be used as a flocculant, in the paper industry, in the treatment of industrial waste water, as a dispersion aid and protective colloid for boring mud and as in aid in secondary oil transportation.
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