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公开(公告)号：DE2544219A1
公开(公告)日：1977-04-21
申请号：DE2544219
申请日：1975-10-03
Applicant: BASF AG
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公开(公告)号：DE2534230A1
公开(公告)日：1977-02-17
申请号：DE2534230
申请日：1975-07-31
Applicant: BASF AG
Inventor： LEUTNER BERND DIPL CHEM DR , DIEHL LOTHAR DIPL CHEM DR
Abstract: Use of sulphur concrete for prodn. and lining of salt-, acid-alkali- and solvent-resistant pipes and containers in claimed. The S concrete is obtd. by mixing molten S and dicyclopentadiene as binder with aggregates at 120-160 degrees C. The time for which S and dicyclopentadiene act on one another at the selected temp. is set according to a specific area on a graph of time against temp. S concrete obtd. has improved resistance to chemicals and solvents. e.g. total wear on exposure to (1) 0.1 mol/l NaOH, (2) 6.1 mol/l NaOH was (1) 0.01 mm/year, (2) 2.77 mm/year when using S concrete (I) contg. 22 wt % binder consisting of 95/5 S/dicyclopentadiene. A standard S concrete control sample, (II) contg. 24 wt % S binder dissolved in 3-4 days when exposed to 6.1 mol/l NaOH. S concrete prodn. may take place in 2 steps, and allows mixing binder components in one place, storage and transport, before adding aggregates, opt. at a different temp. In an example, 95 pbw S were mixed with 5 pbw liquid dicyclopentadiene at 135 degrees C and left 135 min. at this temp. Liquid binder was poured onto 354.5 pbw hot sand and mixed 15 min.
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公开(公告)号：DE2461483A1
公开(公告)日：1976-07-08
申请号：DE2461483
申请日：1974-12-24
Applicant: BASF AG
Inventor： LEUTNER BERND DIPL CHEM DR , DIETHL LOTHAR DIPL CHEM DR
Abstract: S-Concrete is prepd. by mixing molten S and dicyclopentadiene with aggregates at 120-160 (130-145) degrees C and adjusting time at which S and dicyclopentadiene react on one another at selected temp. Mixt. pref. contains 2-8 (4-6) wt % dicyclopentadiene (w.r.t. S). Process can take place by introducing dicyclopentadiene into moltens S and reacting components for temp. -dependent time, while introducing the aggregates. Dicyclopentadiene may also be added, with mixing, to a mixt. of S and aggregates brought to desired temp. Prod. has high compressive- and bending strength also when using comparatively low binder contents.
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公开(公告)号：DE2824443A1
公开(公告)日：1979-12-13
申请号：DE2824443
申请日：1978-06-03
Applicant: BASF AG
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公开(公告)号：DE2628988A1
公开(公告)日：1978-01-12
申请号：DE2628988
申请日：1976-06-28
Applicant: BASF AG
Abstract: In the prodn. of basic aluminium cpds. of the formula Al2(OH)n(A)6-n.1/x (I), (where n is 1,2,3,4 or 5; A is bromide, sulphate or nitrate; and x is the valence of A), (a) an aq. soln. of aluminium bromide, sulphate or nitrate contg. is not >25 g./l. Al is treated with a is not >1.05 mol./l. soln. of an amine of mol.wt. 250-500 in a water-immiscible organic solvent; and (b) the aq. and organic phases are sepd. from each other. (I) are useful as ingredients of antiperspirant and haemostatic prepns. They can also be used for hydrophobising textiles, as tanning agents, as flocculating and phosphate-pptg. agents in water purificn., and in the prodn. of fire-resistant materials. Use of liq. ion-exchangers (i.e., organic solns. of amines) permits more rapid ion-exchange and reduces appts. costs, while the liq. ion-exchange is less sensitive towards contamination and poisoning than solid ion-exchange resins. The amt. of chemicals and wash water required for regeneration of the ion-exchanger is smaller.
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Patent Agency Ranking
公开(公告)号：DE2512503A1
公开(公告)日：1976-10-07
申请号：DE2512503
申请日：1975-03-21
Applicant: BASF AG
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公开(公告)号：DE3209223A1
公开(公告)日：1983-09-15
申请号：DE3209223
申请日：1982-03-13
Applicant: BASF AG
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公开(公告)号：DE2544218A1
公开(公告)日：1977-04-21
申请号：DE2544218
申请日：1975-10-03
Applicant: BASF AG
Inventor： LEUTNER BERND DIPL CHEM DR , SCHLIMPER HANS-ULRICH DIPL CHE , WURMB ROLF DIPL CHEM DR , TEYSOHN RAINER DIPL CHEM DR
Abstract: Fillers contg. ZnO, made by simultaneous addn. of a Zn salt in aq. soln. and a base to an aq. suspension contg. 30 wt. % max. inorganic carrier, to maintain pH 10-12. The carrier is pref. silica, a silicate and/or carbonate; Max. rate of addn. of Zn salt is 0.003 mol/min. for each g. carrier per 1. suspension. Pref. after addn. of 90% of the Zn salt required, the pH is reduced to 9-10. Temp. of the suspension is pref. 30-80 degrees (45-55 degrees)C. Synergistic action in combination with other flame retardants, e.g. halogenated cpds., is increased. Lower amounts can be used and adverse effect on mechanical properties of the polyamide reduced.
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公开(公告)号：DE2512502A1
公开(公告)日：1976-10-07
申请号：DE2512502
申请日：1975-03-21
Applicant: BASF AG
Inventor： WURMB ROLF DIPL CHEM DR , LEUTNER BERND DIPL CHEM DR , THEYSOHN RAINER DIPL CHEM DR , SCHLIMPER HANSULRICH DIPL CHEM
Abstract: Fillers of Sb2O3 are produced on an inorg. support by adding an aq. Sb(III) halide soln. and aq. soln. of a base to an aq. suspension of an inorg. support, contg. max. 15 wt. % support, to increase the pH to 6-8 and ppte. Sb2O3 onto the support and then sepg. the solids from the aq. phase. The filler improves the flame retardancy of plastics and at least retards dripping on combustion, e.g. in an open flame.
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公开(公告)号：DE3041324A1
公开(公告)日：1982-06-16
申请号：DE3041324
申请日：1980-11-03
Applicant: BASF AG
Inventor： BLANCK KLAUS DIPL CHEM DR , DETHLEFSEN WINFRIED DIPL CHEM , JUNGBAUER ANTON DIPL CHEM DR , LEUTNER BERND DIPL CHEM DR , SCHIER ERNST-JUERGEN DIPL CHEM , SCHLIMPER HANS-ULRICH DIPL CHE , SCHNEEHAGE HANS DIPL CHEM DR
IPC: C07D251/60 , B01D53/86 , B01J23/00 , B01J23/72 , B01J23/745 , C01C1/12 , C07B61/00 , B01D53/36
Abstract: The reaction off-gas from the synthesis of melamine consists, after separating off the melamine, mainly of ammonia and carbon dioxide, with traces of hydrogen cyanide, isocyanic acid, urea and residual melamine. To remove these trace components, the off-gas is passed over a catalyst, containing copper oxide and/or iron oxide, in the presence of steam at from 100 DEG to 500 DEG C.
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