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公开(公告)号：DE59611188D1
公开(公告)日：2005-03-10
申请号：DE59611188
申请日：1996-08-16
Applicant: BASF AG
Inventor： STROEZEL MANFRED , BROECKER DR , JANSEN HELMUT , KAIBEL DR
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公开(公告)号：DE50103595D1
公开(公告)日：2004-10-21
申请号：DE50103595
申请日：2001-06-29
Applicant: BASF AG
Inventor： KAIBEL DR , STAMMER DR , STROEZEL MANFRED
IPC: B01J19/32
Abstract: In zig-zag sheet metal column packing, a proportion X of the openings has a spacing b which is no greater than 0.4a from a fold edge. The proportion X is at least 60%. Preferred Features: X is at least 80% or 90%. Dimension b is 0.3a or 0.2a at most. The angle of folding is 40-120 degrees , preferably 60-90 degrees . Openings take up 5-40%, preferably 10-20% of the folded area. Openings are rectangular with aspect ratio 5:1 to 1:1, preferably 3:1 to 2:1. The longer side of the opening, is parallel to the folded edges. In a packed column, folded edges of the packing include an angle of 20-70 degrees , preferably 30-45 degrees with the column axis.
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公开(公告)号：DE50006643D1
公开(公告)日：2004-07-08
申请号：DE50006643
申请日：2000-03-30
Applicant: BASF AG
Abstract: A distillation process and assembly separate a mixture consisting of a substance with a high melting point (m.p.) and a seco substance or mixture of substances with a lower m.p. A distillation process and assembly separate a mixture consisting of a substance (2) with a high melting point (m.p.) and a second substance or mixture of substances with a lower m.p. The starting mixture incorporating the substance (1) of low boiling point (b.p.) is released into the distillation apparatus, which consists of a partitioned column or of a thermally-coupled distillation column. The head of the distillation apparatus is positioned above the tapping outlet for the higher m.p. substance (2). Part of the condenser surface is of lower temperature than that of the higher m.p. substance. The light substance (1) in th head is strongly enriched, preventing separation of the higher m.p. substance (2) on the condenser.
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公开(公告)号：DE50100896D1
公开(公告)日：2003-12-11
申请号：DE50100896
申请日：2001-08-25
Applicant: BASF AG
Inventor： THERRE DR , KAIBEL DR , AQUILA DR , WEGNER DR , FUCHS HARTWIG
IPC: C07C41/50 , C07B61/00 , C07C41/56 , C07C41/58 , C07C43/303
Abstract: Preparation of acetals by reaction of 1 mol. of an unsaturated aldehyde with 1 mol. of an unsaturated alcohol in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. Preparation of acetals (I) by reaction of 1 mol. of an unsaturated aldehyde (II) with 1 mol. of an unsaturated alcohol (III) in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. R - R = H or optionally substituted 1-6C alkyl; and R = H, an optionally mono- or poly-unsaturated, optionally substituted 1-12C alkyl or an optionally substituted 3-12-membered optionally mono- or poly-unsaturated carbon ring.
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Patent Agency Ranking
公开(公告)号：DE59905169D1
公开(公告)日：2003-05-28
申请号：DE59905169
申请日：1999-11-13
Applicant: BASF AG
Inventor： OOST DR , STROEZEL MANFRED , ETZRODT DR , WELLER DR , KAIBEL DR , JAEDICKE DR
Abstract: Preparation of unsaturated methyl ketones(I), from an unsaturated alcohol(II) and alkyl acetoacetate(III) in the presence of an organo-aluminum catalyst(IV) comprises: (a) supplying (II) and (IV) to a reactor with a distillation column, (b) making temperature to be 170-250 degrees C under elevated pressure, (c) dosing the mixture with (III) and (d) maintaining a constant (III) content of 0.1-10 wt.% during the reaction. Preparation of unsaturated ketones of formula (I) involves reaction of an unsaturated alcohol of formula (II) with an alkyl acetoacetate of formula (III), in presence of 0.1-5 mol. % (based on (II)) of an organo-aluminum compound catalyst (IV), with elimination and distillative separation of the alcohol R3OH formed in the reaction, in a reactor system provided with a distillation column. Reaction is carried out by: (a) supplying (I (which boils at less than 140 degrees C), without a solvent, and (IV) to the reaction vessel, (b) adjusting the temperature to a value as constant as possible in the range 170-250 degrees C under elevated pressure, (c) dosing the mixture with (III) and (d) maintaining a (III) content as constant as possible in the range 0.1-10 wt. % during the reaction. Dotted line = optional bond; R1 = Me or Et; R2, R3 = 1-4C alkyl.
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公开(公告)号：DE59904210D1
公开(公告)日：2003-03-13
申请号：DE59904210
申请日：1999-09-17
Applicant: BASF AG
Inventor： THERRE DR , KAIBEL DR , AQUILA DR , WEGNER DR , FUCHS HARTWIG
IPC: B01J27/16 , C07B61/00 , C07C41/28 , C07C43/15 , C07C45/37 , C07C45/51 , C07C45/54 , C07C45/67 , C07C47/21 , C07C49/203
Abstract: Preparation of citral (I) comprises thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal and rearrangement of obtained intermediates cis/trans-prenyl-(methyl-butadienyl)-ether (IV) and 2,4,4-trimethyl-3-formyl-1,5-hexadiene (V). (IV) and (V) are continuously distilled off and converted into (I) before or after removal of by-product prenol. Preparation of 3,7-dimethyl-2,6-octadien-1-al (citral) of formula (I) comprises: (1) thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal of formula (II) optionally in the presence of an acid catalyst to split off 3-methyl-buten-1-ol (prenol) of formula (III) and form cis/trans-prenyl-(methyl-butadienyl)-ether of formula (IV); (2) Claisen rearrangement of (IV) to give 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula (V); and (3) Cope rearrangement of (V) to form (I). The transitionally formed (IV) and (V) and the desired citral as well as the prenol (III) are continuously distilled out of the reaction mixture and (IV) and (V), before or after distillative separation of (III) and optional by-products, are subjected to rearrangement to form (I) at 100-200 degrees C.
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公开(公告)号：DE59903222D1
公开(公告)日：2002-12-05
申请号：DE59903222
申请日：1999-03-26
Applicant: BASF AG
Inventor： BROECKER DR , KAIBEL DR , AQUILA DR , FUCHS HARTWIG , WEGNER DR , STROEZEL MANFRED
IPC: B01J23/44 , B01J8/20 , B01J8/22 , B01J19/24 , B01J23/46 , C07B61/00 , C07C45/62 , C07C47/21 , C07C49/04
Abstract: Production of saturated carbonyl compounds (I) by selective liquid-phase hydrogenation of alpha , beta -unsaturated carbonyl compounds (II) is carried out in a packed bubble column with the product recycled and by circulating hydrogen gas. Production of saturated carbonyl compounds of formula R1-CH(R2)-CH(R3)-C(R4)=O (I) by selective liquid-phase hydrogenation of alpha , beta -unsaturated carbonyl compounds of formula R1-C(R2)=C(R3)-C(R4)=O (II) in the presence of a particulate palladium and/or rhodium catalyst and a base is carried out in a packed bubble column with the product recycled and by circulating hydrogen gas. R1 = H or an organic group; R2-R4 = H or 1-4C alkyl.
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公开(公告)号：DE59706425D1
公开(公告)日：2002-03-28
申请号：DE59706425
申请日：1997-10-20
Applicant: BASF AG
Inventor： STROEZEL MANFRED , RHEUDE DR , RAHN DR , KAIBEL DR
IPC: C07B49/00 , C07C29/124 , C07C29/40 , C07C31/00 , C07C33/02
Abstract: A process for carrying out exothermic reactions comprises (a) addition reaction of an organomagnesium halide of formula RMgX with a carbonyl compound; and (b) hydrolysis of the addition product in a solvent or solvent mixture, in which much of the heat liberated in the reaction is removed by evaporation of the solvent. R = 1-6C alkyl, alkenyl or alkynyl, or aryl; X = Cl, Br or I.
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公开(公告)号：DE59701788D1
公开(公告)日：2000-07-06
申请号：DE59701788
申请日：1997-01-15
Applicant: BASF AG
Inventor： KAIBEL DR , RHEUDE DR , STROEZEL MANFRED , GRAAUW PROF DR , OLUJIC DR , FREY GUENTHER , JANSEN HELMUT
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