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公开(公告)号：DE2603764A1
公开(公告)日：1977-08-04
申请号：DE2603764
申请日：1976-01-31
Applicant: BASF AG
Inventor： SANDER BRUNO DIPL CHEM DR , KLAERNER PETER DIPL CHEM DR , KEPPLER HANS GEORG DIPL ING DR , BRONSTERT KLAUS DIPL CHEM DR , GAUSEPOHL HERMANN DIPL CHEM DR
Abstract: Purificn. of waste water generated during mfr. of styrene bead polymers (I) in presence of vinyl pyrrolidone of vinyl alcohol polymers as suspension stabilisers, comprises adding a pptg. agent (II) then removing the sepd. suspended solids. (II) is 0.05-3, esp. 0.1-1 pt. per 100 pts. waste water of a water-soluble amide-NH4 or diNH4 salt of a styrene-maleic anhydride copolymer of up to 50% maleic anhydride content which has Staudinger index (in DMF at 25 degrees C) 5-150, pref. 10-60 cc./g. The pH of the water is adjusted to 3 with inorganic acid. Pref. (II) is added as a 0.1-20, esp. 1-10 wt. % aq. soln. or dispersion. Almost complete removal of suspended solids is economically achieved leaving clear water of very low residual organic C content.
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公开(公告)号：DE2733471A1
公开(公告)日：1979-02-15
申请号：DE2733471
申请日：1977-07-25
Applicant: BASF AG
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公开(公告)号：DE3125446A1
公开(公告)日：1983-01-20
申请号：DE3125446
申请日：1981-06-27
Applicant: BASF AG
Inventor： KEPPLER HANS GEORG DIPL ING DR
Abstract: A process for the preparation of styrene homopolymers or copolymers by suspension polymerization of monomers which contain dissolved styrene polymers from a preceding suspension polymerization, in the presence of sparingly soluble metal phosphates as suspension stabilizers, wherein, before the polymerization is started, the monomer phase is dispersed in an aqueous phase, containing a dissolved mineral acid, preferably phosphoric acid, at from 10 DEG to 80 DEG C. for from 5 to 120 minutes, after which the sparingly soluble metal phosphate is formed in situ in the aqueous phase. The process is particularly suitable for the preparation of expandable styrene polymers, in which case a volatile blowing agent is added to the suspension before, during or after polymerization.
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公开(公告)号：DE2638839A1
公开(公告)日：1978-03-02
申请号：DE2638839
申请日：1976-08-28
Applicant: BASF AG
Inventor： KEPPLER HANS GEORG DIPL ING DR , STAHNECKER ERHARD DIPL CHEM DR , MOELLER ROLF DIPL CHEM DR
Abstract: Process for the manufacture of styrene polymers optionally containing blowing agent by polymerization in aqueous suspension using as the suspension stabilizer a calcium phosphate which after its manufacture by precipitation has been heated in aqueous dispersion for at least 2 hours at from 70 DEG to 130 DEG C. The styrene polymers may be used for the manufacture of foams.
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公开(公告)号：DE2548524A1
公开(公告)日：1977-05-05
申请号：DE2548524
申请日：1975-10-30
Applicant: BASF AG
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Patent Agency Ranking
公开(公告)号：DE2609104A1
公开(公告)日：1977-09-15
申请号：DE2609104
申请日：1976-03-05
Applicant: BASF AG
Inventor： KEPPLER HANS GEORG DIPL ING DR , STAHNECKER ERHARD DIPL CHEM DR , MOELLER ROLF DIPL CHEM DR
Abstract: Styrene polymers are prepared by suspension polymerization using, as suspension stabilizers, mixtures of (A) a sparingly soluble inorganic metal compound and (B) a fine polymer dispersion. The styrene polymers may be used, together with blowing agents, for the manufacture of foams.
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公开(公告)号：DE2510937A1
公开(公告)日：1976-09-30
申请号：DE2510937
申请日：1975-03-13
Applicant: BASF AG
Inventor： NINTZ ECKHARD DIPL CHEM DR , KEPPLER HANS GEORG DIPL ING DR , STAHNECKER ERHARD DIPL CHEM DR
Abstract: Expandable polystyrene particle prepn. by suspension polymerisation of styrene and opt. further co-monomers in the presence of organic suspension stabilisers and blowing agents, takes place in the presence of 0.001-0.4 (0.01-0.2) wt. %, w.r.t. aq. phase of polymerisation batch, of phosphates and/or carbonates of Ca and/or Mg. Method is used in prodn. of foamed articles, by heating pre-foamed compsn. in moulds and sintering. Particles obtd. have a low internal water content, e.g. 0.3-0.8 wt. %. Agglomeration of single particles on foaming is prevented. Waste water pollution by organic cpds. can be reduced by 60% w.r.t. standard processes.
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公开(公告)号：DE2640999A1
公开(公告)日：1978-03-16
申请号：DE2640999
申请日：1976-09-11
Applicant: BASF AG
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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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