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公开(公告)号：DE3100899A1
公开(公告)日：1982-08-05
申请号：DE3100899
申请日：1981-01-14
Applicant: BASF AG
Abstract: A process for dewatering petroleum-containing sludges by a two-stage method using finely divided additives and organic flocculants, wherein (a) finely divided additives, such as ash, coal, sand or mixtures of these, in a free-flowing form or as an aqueous suspension, are homogeneously dispersed in the petroleum-containing sludge, in an amount such that the total solids content of the resulting mixture is from 10 to 30% by weight, especially from 12 to 20% by weight, (b) this sludge mixture is treated with an aqueous solution of an organic flocculant, preferably of anionic nature, (c) the greater part of the sludge water is removed by gravity filtration, (d) the pre-dewatered sludge mixture is treated with an aqueous solution of aluminum salts or trivalent iron salts and (e) this mixture is substantially dewatered by pressure filtration, in the course of which the greater part of the petroleum present is also removed.
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公开(公告)号：DE2346081A1
公开(公告)日：1975-04-24
申请号：DE2346081
申请日：1973-09-13
Applicant: BASF AG
Inventor： SANDER BRUNO DIPL CHEM DR , BERBNER HEINZ , HOFFMANN MANFRED
Abstract: A process for the manufacture of nonfoaming aqueous suspensions of polyolefin fibrids using suitable dispersing agents. These are obtained by polycondensation of 1 mole of melamine, from 1.8 to 3 moles of formaldehyde and from 0.1 to 0.5 molar portions of amino carboxylic acids or alkali metal salts thereof. Very small quantities of said dispersing agents are sufficient to finely disperse the hydrophobic polyolefin fibrids in water and to prevent the formation of foam in the manufacture of web structures of a paper-like and textile-like nature. The aqueous suspensions of polyolefin fibrids may also contain cellulose fibers.
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公开(公告)号：DE2616587A1
公开(公告)日：1977-11-03
申请号：DE2616587
申请日：1976-04-14
Applicant: BASF AG
Inventor： KLAERNER PETER DIPL CHEM DR , SANDER BRUNO DIPL CHEM DR , KEPPLER HANS GEORG DIPL ING DR , BRONSTERT KLAUS DIPL CHEM DR , GAUSEPOHL HERMANN DIPL CHEM DR
Abstract: Purificn. of waste liquor (I) from the prodn. of styrene bead polymers in the presence of vinylpyrrolidone polymers or vinyl alcohol polymers as suspension stabilisers involves addn. of precipitant and sepn. of the sediment formed 100 pts. (I) are treated with 0.05-3 esp. 0.1-1 pts. water-soluble amide-ammonium or diammonium salt (II) of styrene/maleic anhydride copolymer contg. max. 50 mole% maleic, anhydride, having a Staudinger index of 5-150, pref. 10-60 cm3/g in dimethylformamide at 25 degrees C. An inorganic acid is then added to pH below 3. The improvement comprises the use of (II) contg. 2-40, pref. 5-20 wt.% copolymerised (meth)acrylic acid. The treated liquor is clearer. (II) is added in the form of a 0.1-20 pref. 1-20 wt.% aq. soln. or dispersion. In an example, the addn. of (II) to (I) and adjustment to pH2 reduced the total organic C content of the filtrate from 59,200 to 110 mg C/l and the chemical oxygen demand from 103,200 to 380 mg O2/l.
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公开(公告)号：DE2516562A1
公开(公告)日：1976-10-28
申请号：DE2516562
申请日：1975-04-16
Applicant: BASF AG
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Patent Agency Ranking
公开(公告)号：DE2920434A1
公开(公告)日：1980-11-20
申请号：DE2920434
申请日：1979-05-19
Applicant: BASF AG
Inventor： SANDER BRUNO DIPL CHEM DR
Abstract: Improving the dewatering characteristics of sludges using an organic flocculant, subjecting the sludges, after the organic flocculant has been added, to an energy input of from 0.005 to 0.5 watt/litre, in particular from 0.01 to 0.2 watt/litre, in a mixing apparatus for from 0.5 to 3 minutes, in particular 1 to 2 minutes. The organic flocculant used can basically be any one of the commercial brands. They are water-soluble macromolecular compounds from the polymerisation or copolymerisation of acrylamide, acrylic acid and/or salts thereof or esters of acrylic or methacrylic acid which have been specially modified via their alcohol component.
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7.发明专利
公开(公告)号：DE2545727A1
公开(公告)日：1977-04-21
申请号：DE2545727
申请日：1975-10-11
Applicant: BASF AG
Inventor： SANDER BRUNO DIPL CHEM DR , BERBNER HEINZ ING GRAD , BONITZ ECKHARD DIPL CHEM DR , SCHERLING KURT
Abstract: Prepn. of non-foaming, aq. suspensions of fibrils made from a polymer other than polyolefins comprises dispersing the fibrils in water in the presence of 0.1-2 wt. % (on dry wt. of the fibrils) of an anionic protective colloid (I) as dispersion aid. (I) is pref. a melamine-HCHO polycondensate; the NH4 salt of a maleic acid - vinyl isobutyl ether copolymer, or the NH4 salt of a styrene and acrylic acid copolymer. The suspensions, opt. mixed with cellulose fibres, are used to make synthetic paper. By using (I) foaming in the papermaking machine is prevented; excellent dispersion is achieved at low (I) concns. and the prods. have high wet strength.
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公开(公告)号：DE2516561A1
公开(公告)日：1976-10-28
申请号：DE2516561
申请日：1975-04-16
Applicant: BASF AG
Abstract: Fibrids of polymers of styrene, which are obtained in a fluid precipitation medium under the action of shearing forces.
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