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公开(公告)号：DE3029744A1
公开(公告)日：1982-03-11
申请号：DE3029744
申请日：1980-08-06
Applicant: BASF AG
Abstract: Desublimator for isolating sublimation products from reaction gases, which consists of a closed housing and a plurality of rows of finned tubes accommodated horizontally and superposedly therein, successive superposed finned tubes being supported, and mutually spaced, with limited adjustability, by means of cage-like perforated sliding shoes surrounding them in a box-like manner, the sliding shoes of the individual finned tubes being directly stacked one above the other and resting loosely on common supporting girders anchored to the housing, and the supporting girders having, in cross-section, the outline of a triangle with its apex pointing downward.
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公开(公告)号：IT1025465B
公开(公告)日：1978-08-10
申请号：IT2915674
申请日：1974-11-06
Applicant: BASF AG
Inventor： WIRTH FRIEDRICH DIPL CHEM DR , RENAUER ERICH DIPL CHEM DR , AMMON HANS VON DIPL ING , SCHNEIDER CURT A DIPL CHEM DR , SUTER HUBERT DIPL CHEM DR
IPC: C07D307/36 , C07C51/573 , C07D307/60 , C07D307/89 , C07C
Abstract: Maleic anhydride is recovered by evaporating the effluent from the production of phthalic anhydride at from 40 DEG to 150 DEG C and from 50 to 760 mm to a water content of less than 10% by weight, heating the concentrate in a thin-film or falling-film evaporator at from 100 to 600 mm at from 120 DEG to 180 DEG C and distilling it in a column. The pure maleic anhydride is withdrawn laterally and the aqueous condensate is recycled to the offgas scrubber.
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公开(公告)号：GB1478525A
公开(公告)日：1977-07-06
申请号：GB4837974
申请日：1974-11-08
Applicant: BASF AG
Inventor： WIRTH FRIEDRICH DIPL CHEM DR , RENAUER ERICH DIPL CHEM DR , AMMON HANS VON DIPL ING , SCHNEIDER CURT A DIPL CHEM DR , SUTER HUBERT DIPL CHEM DR
IPC: C07D307/36 , C07C51/573 , C07D307/60 , C07D307/89
Abstract: 1478525 Maleic anhydride recovery BASF AG 8 Nov 1974 [9 Nov 1973] 48379/74 Heading C2C Maleic-anhydride present in an effluent containing up to 40 wt. per cent maleic anhydride obtained by scrubbing, with water, the off-gas from the production of phthalic anhydride by catalytic-oxidation of xylene, with air, is recovered by evaporating the effluent solution, in one or more stages, at 40-150‹ C. under 50- 760 mm. Hg to a water content of less than 10 wt. per cent, heating the concentrate to 120- 180‹ C. under 100-600 mm. Hg in a thin-film or falling film evaporator, cooling the resulting maleic anhydride vapours to 110-140‹ C. and distilling the condensed maleic anhydride in such a manner that pure maleic anhydride is removed laterally and the volatiles are removed overhead, all the aqueous condensate obtained being returned to the off-gas scrubber.
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公开(公告)号：ATA897374A
公开(公告)日：1976-10-15
申请号：AT897374
申请日：1974-11-08
Applicant: BASF AG
Inventor： WIRTH FRIEDRICH DIPL CHEM DR , RENAUER ERICH DIPL CHEM DR , AMMON HANS VON DIPL ING , SCHNEIDER CURT A DIPL CHEM DR , SUTER HUBERT DIPL CHEM DR
IPC: C07D307/36 , C07C51/573 , C07D307/60 , C07D307/89
Abstract: Maleic anhydride is recovered by evaporating the effluent from the production of phthalic anhydride at from 40 DEG to 150 DEG C and from 50 to 760 mm to a water content of less than 10% by weight, heating the concentrate in a thin-film or falling-film evaporator at from 100 to 600 mm at from 120 DEG to 180 DEG C and distilling it in a column. The pure maleic anhydride is withdrawn laterally and the aqueous condensate is recycled to the offgas scrubber.
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公开(公告)号：DE3108101A1
公开(公告)日：1982-09-16
申请号：DE3108101
申请日：1981-03-04
Applicant: BASF AG
IPC: C07D307/89 , B01J23/92 , B01J27/28 , B01J27/32 , B01J37/20 , B01J37/28 , B01J38/12 , B01J38/20 , C07B61/00 , C07C51/265 , B01J23/94
Abstract: A process for reactivating a vanadium-containing oxidation catalyst, wherein the catalyst is treated first at from 100 DEG to 600 DEG C., with a volatile phosphorus compound in the presence of an oxygen-containing gas, and then at from 50 DEG to 600 DEG C. with sulfur trioxide or a mixture of a volatile sulfur compound and an oxygen-containing gas.
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Patent Agency Ranking
公开(公告)号：DE2925682A1
公开(公告)日：1981-01-29
申请号：DE2925682
申请日：1979-06-26
Applicant: BASF AG
IPC: C07D307/89 , B01J23/22 , B01J27/18 , B01J27/198 , B01J37/02 , C07B61/00 , C07C51/215 , C07C51/265 , C07C51/31 , B01J21/06 , B01J23/02 , B01J23/16
Abstract: A supported catalyst, containing vanadium pentoxide, titanium dioxide, phosphorus, rubidium and any optionally added cesium, with or without zirconium dioxide, in which the catalytic material contains from 1 to 40% by weight of V2O5, from 60 to 99% by weight of TiO2 and/or ZrO2 and, based on the total amount of TiO2, ZrO2 and V2O5, up to 2% by weight of phosphorus and up to 1.5% by weight of rubidium and/or cesium, and which comprises two layers, of which the inner layer contains more than 0.2 and up to 2% by weight of phosphorus, but no rubidium and/or cesium, and the outer layer contains from 0 to 0.2% by weight of phosphorus and from 0.02 to 1.5% by weight of rubidium and/or cesium, the outer layer accounting for from 10 to 90% by weight of the total catalytic material.
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公开(公告)号：AT342018B
公开(公告)日：1978-03-10
申请号：AT897374
申请日：1974-11-08
Applicant: BASF AG
Inventor： WIRTH FRIEDRICH DIPL CHEM DR , RENAUER ERICH DIPL CHEM DR , AMMON HANS VON DIPL ING , SCHNEIDER CURT A DIPL CHEM DR , SUTER HUBERT DIPL CHEM DR
IPC: C07D307/36 , C07C51/573 , C07D307/60 , C07D307/89
Abstract: Maleic anhydride is recovered by evaporating the effluent from the production of phthalic anhydride at from 40 DEG to 150 DEG C and from 50 to 760 mm to a water content of less than 10% by weight, heating the concentrate in a thin-film or falling-film evaporator at from 100 to 600 mm at from 120 DEG to 180 DEG C and distilling it in a column. The pure maleic anhydride is withdrawn laterally and the aqueous condensate is recycled to the offgas scrubber.
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公开(公告)号：DE2436009A1
公开(公告)日：1976-02-12
申请号：DE2436009
申请日：1974-07-26
Applicant: BASF AG
Inventor： BLECHSCHMITT KURT , WIRTH FRIEDRICH DIPL CHEM DR , HORNBRERGER PAU DIPL-CHEM DR , REUTER PETER DIPL CHEM DR , BUERGER GERT DIPL CHEM DR
IPC: C07D307/89 , B01J23/22 , C07B61/00 , C07C51/265 , C07C51/31
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公开(公告)号：DE2313306A1
公开(公告)日：1974-09-26
申请号：DE2313306
申请日：1973-03-17
Applicant: BASF AG
Inventor： LEMAN OTTO DIPL ING , KUBE WOLFGANG DIPL ING , KARAU DIETER DIPL ING , WAGNER JOACHIM DIPL ING , WIRTH FRIEDRICH DIPL CHEM DR , HORNBERGER PAUL DIPL CHEM DR
IPC: B01D3/00 , C07C51/573 , C07D307/89 , C07C63/18
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公开(公告)号：DE2309657A1
公开(公告)日：1974-09-12
申请号：DE2309657
申请日：1973-02-27
Applicant: BASF AG
IPC: C07C57/05 , A47J37/06 , B01J23/00 , B01J23/22 , C07B61/00 , C07C51/00 , C07C51/21 , C07C51/25 , C07C51/265 , C07C51/31 , C07C57/145 , C07C67/00 , C07D307/60 , C07D307/89 , C07C51/20 , C07C57/14 , C07C63/18
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