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    Purification process of sterically protected 4-aminopiperidines
    11.
    发明专利
    Purification process of sterically protected 4-aminopiperidines 未知

    公开(公告)号：CZ290805B6

    公开(公告)日：2002-10-16

    申请号：CZ391798

    申请日：1997-05-30

    Applicant: BASF AG

    Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

    IPC: C07D211/58 ,  C07D211/56 ,  C07D221/20

    Abstract: The present invention relates to purification of raw piperidines of the general formula I, in which Re1 through Re4 represent alkyl containing 1 to 6 carbon atoms, or Re1 and Re2 and/or Re3 and Re4 form together the CHi2-chain containing 2 to 5 carbon atoms, wherein the purification process comprises a first step consisting in removal of compounds with high boiling point and water, if present, from raw piperidines by employing distillation; a second step consisting in addition of 0.01 to 5 percent by weight, based on the weight of the first step product, of a reducing agent; and a third step, in which piperidines are isolated by distillation.

    13.
    发明专利
    未知

    公开(公告)号：AT218592T

    公开(公告)日：2002-06-15

    申请号：AT99916829

    申请日：1999-03-18

    Applicant: BASF AG

    Inventor： BREINER ULRIKE ,  JULIUS MANFRED ,  NEUBERG RAINER ,  WEISS ROBERT ,  WILMS AXEL ,  HU HARRY Y

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/16 ,  C08G69/28 ,  C08G69/48 ,  C08K5/3435

    Abstract: A process for preparing polyamides comprises polymerizing starting monomers or starting oligomers in the presence of at least one compound of the formula (I)whereR is a functional group R which bears 1-4 identical or different amide-forming groups R ,R is H, C1-C20-alkyl, cycloalkyl, benzyl or OR , where R is H, C1-C20-alkyl, cycloalkyl or benzyl,R , R , R and R are independently C1-C10-alkyl,n is a natural number greater than 1, andthe piperidine derivatives attached to R are identical or different with regard to the substituents, meaning R , R , R , R and R .The polyamides are useful for preparing filaments, fibers, films, sheetlike structures and moldings.

    СПОСОБ ИНГИБИРОВАНИЯ ДИМЕРИЗАЦИИ 4-АМИНОПИПЕРИДИНА, КОМПОЗИЦИЯ, СОДЕРЖАЩАЯ ИНГИБИТОР И ЕЁ ПРИМЕНЕНИЕ
    17.
    发明专利
    СПОСОБ ИНГИБИРОВАНИЯ ДИМЕРИЗАЦИИ 4-АМИНОПИПЕРИДИНА, КОМПОЗИЦИЯ, СОДЕРЖАЩАЯ ИНГИБИТОР И ЕЁ ПРИМЕНЕНИЕ 未知

    公开(公告)号：EA001211B1

    公开(公告)日：2000-12-25

    申请号：EA199801029

    申请日：1997-05-28

    Applicant: BASF AG

    Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

    IPC: C07B63/04 ,  C07D211/58 ,  C07D211/72 ,  C07D221/20 ,  C08K5/3435

    Abstract: Способингибированиядимеризациипиперидинас формулой Iвкоторомзаместителиот Rдо Rявляютсяалкильнымирадикаламис числоматомовуглеродаот 1 до 6, Rи Rи/или Rи RпопарносоставляютСН-цепочкис числоматомовуглеродаот 2 до 5, отличающийсятем, чток пиперидинудобавляетсяот 0,001 до 0,2 весовых % восстановителяс общейформулой MXHY, гдеМ -щелочнойметаллили NR, причемзаместители R могутбытькакодинаковыми, таки различнымиалкильнымирадикаламис числоматомовуглеродаот 1 до 4, илиодинэквивалентщелочноземельногометалла, илиодинэквивалентцинка, Хозначаетборилиалюминий, Y означаетН или CN, a m равно 0 или 1. Такжеописанасмесьпиперидина I, восстановителяв количествеот 0,001 до 0,2 весовых %, содержащаяот 1 до 1000 миллионныхдолейдимерапиперидина I иполучениесветостабилизаторовнаосновестерическизатрудненныхаминовизэтойсмеси.

    19.
    发明专利
    未知

    公开(公告)号：ES2146471T3

    公开(公告)日：2000-08-01

    申请号：ES97927060

    申请日：1997-05-28

    Applicant: BASF AG

    Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

    IPC: C07B63/04 ,  C07D211/58 ,  C07D211/72 ,  C07D221/20 ,  C08K5/3435

    Abstract: PCT No. PCT/EP97/02763 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 28, 1997 PCT Pub. No. WO97/46528 PCT Pub. Date Dec. 11, 1997The invention relates to a process for reducing the dimerization of piperidines of the formula I where R1 to R4 are C1- to C6-alkyl, R1 and R2 and/or R3 and R4 together are a CH2 chain having 2 to 5 carbon atoms, which comprises adding to the piperidine from 0.001 to 0.2% by weight of a reducing agent of the formula MXH4-mYm, where M is an alkali metal, NR4, where R are identical or different C1-C4-alkyl groups, or an equivalent of an alkaline earth metal or an equivalent of zinc, X is boron or aluminum, Y is H or CN and m is 0 or 1. The invention also relates to a mixture of piperidines of the formula I, from 0.001 to 0.2% by weight of a reducing agent and from 1 to 1000 ppm of dimers of the piperidines of the formula I, and to the preparation of hindered amine light stabilizers therefrom.

    Process for purifying sterically hindered 4-amino piperidines
    20.
    发明专利
    Process for purifying sterically hindered 4-amino piperidines 未知

    公开(公告)号：AU716280B2

    公开(公告)日：2000-02-24

    申请号：AU3170097

    申请日：1997-05-30

    Applicant: BASF AG

    Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

    IPC: C07D211/58 ,  C07D211/56 ,  C07D221/20

    Abstract: PCT No. PCT/EP97/02822 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 30, 1997 PCT Pub. No. WO97/46529 PCT Pub. Date Dec. 11, 1997A process for purifying crude piperidines of the formula I where R1 to R4 are C1-C6-alkyl, or R1 and R2 and/or R3 and R4 together are a CH2-chain of 2 to 5 carbons, which comprises, in a first step, removing high-boiling substances and, if present, water from the crude piperidines by distillation; in a second step, adding from 0.01 to 5% by weight, based on the product of the first step, as a reducing agent; and, in a third step, isolating the piperidines by distillation.

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