44.
    发明专利
    未知

    公开(公告)号:DE59902990D1

    公开(公告)日:2002-11-14

    申请号:DE59902990

    申请日:1999-02-10

    Applicant: BASF AG

    Abstract: Preparation of propene and optionally 1-butene comprises converting butene isomers to propene isomers using metathesis catalyst and converting formed 2-pentene to propene and 1-butene, isolating and recycling the 2-butene fraction. Preparation of propene and optionally 1-butene comprises: (a) converting 1-butene and 2-butene in the presence of a metathesis catalyst containing group VIb, VIIb or VIII metals; (b) removing propene and 2-pentene formed; (c) converting the 2-pentene using ethene to propene and 1-butene in the presence of the metathesis catalyst in (a); (d) removing propene and 1-butene formed; and (e) discharging the 1-butene and partially isomerizing 1-butene to 2-butene in the presence of a catalyst and recycling the 1-butene and 2-butene with a part of the unreacted 4C-fraction from (a) to (a). An Independent claim is also included for the apparatus for carrying out the preparation of propene and 1-butene comprising a metathesis reactor (R01) connected to a distillation column (K101) for removing 2/3C low boiling, 4C middle boiling and 5C+ high boiling phases; column (K301) for removing ethene and propene; and reactor (R02) for reacting 2-pentene with ethene.

    46.
    发明专利
    未知

    公开(公告)号:DE59802654D1

    公开(公告)日:2002-02-21

    申请号:DE59802654

    申请日:1998-08-20

    Applicant: BASF AG

    Abstract: Ruthenium complexes of the formula I or IVwhereX, Y are anionic ligands,R is hydrogen or a substituted or unsubstituted C1-C20-alkyl radical or C6-C20-aryl radical andL1 and L2 are, independently of one another, uncharged electron donor ligands, are prepared by(a) reaction of RuX3 with L1 and L2 in an inert solvent in the presence of a reducing agent and hydrogen and(b) reaction with compounds of the formula IIwhere R is as defined above, in the presence or absence of water, and, if desired after isolation of the intermediate, with HY, [HL1]Y or [HL2]Y.

    47.
    发明专利
    未知

    公开(公告)号:ID29912A

    公开(公告)日:2001-10-25

    申请号:ID20011140

    申请日:1999-11-23

    Applicant: BASF AG

    Abstract: The invention relates to a method of producing ruthenium complexes of general formula (I): RuX2(=CH-CH2R)L L , wherein X is an anionic ligand, R is hydrogen or an optionally substituted C1-20 alkyl radical or C6-20 aryl radical, and L and L independently are neutral electron-donor ligands. Said ruthenium complexes are produced by a) reacting RuX3 with a diene in a solvent on the basis of one or several aliphatic secondary alcohols in the presence of a reducing adjuvant, reacting said mixture with L and L in the presence of at least one coordinating weak base and hydrogen and without isolating any intermediates, b) reacting the mixture with compounds of general formula (II): R-C=CH, wherein R has the meaning indicated above, in the presence of a soluble chloride source.

    49.
    发明专利
    未知

    公开(公告)号:DE19932060A1

    公开(公告)日:2001-01-18

    申请号:DE19932060

    申请日:1999-07-12

    Applicant: BASF AG

    Abstract: The production of 5C/6C olefins from a 4C olefin-containing product stream involves disproportionation of 1-, 2- and iso-butene on a Group VIb, VIIb or Sub-Group VIII metal-based catalyst followed by distillation to give a 4-6C fraction which is then distilled to give hexene and methylpentene as a high-boiling fraction. A process (A) for the production of 5C/6C olefins from 4C olefins involves: (a) disproportionation of 1-butene, 2-butene and isobutene in a 4C olefin product stream in presence of a disproportionation catalyst containing Group VIb, VIIb or Sub-Group VIII metal compound(s), to give a mixture of 2-6C olefins and butanes; (b) distillation to give a low-boiling fraction (A) comprising 2-3C olefins or 2-4C olefins and butanes, which is removed, and a high-boiling fraction consisting of 4-6C olefins and butanes; (c) distillation of the high-boiling fraction to give a low-boiling fraction (B; butenes and butanes), a middle fraction (C; pentene and methylbutene) and a high-boiling fraction (D; hexene and methylpentene), and (d) separation of (D) as product, with complete or partial return of fractions (B) and/or (C) to stage (a). An Independent claim is also included for a process (B) for the production of 5C/6C olefins and propene from steam cracker streams or refinery 4C streams, involving: (1) removal of butadiene and acetylenes by optional extraction with a butadiene-selective solvent and subsequent or alternative selective hydrogenation of butadienes and acetylenic impurities in the crude 4C fraction, to give a product containing n-butene and iso-butene; (2) removal of isobutene by reaction of the above product with an alcohol in presence of acid catalyst to give an ether, with separation of the ether and alcohol to give a product containing n-butene and possibly oxygenated impurities, and removal of the ether or re-cleavage for the production of pure isobutene by subsequent distillation with optional separation of entrained 3C, iso-4C and 5C hydrocarbons; (3) removal of oxygenated impurities on suitable adsorbers; and (4) disproportionation of the refined product (II) stream as in stages (a)-(d) above.

Patent Agency Ranking