中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

57 records (took 0.045 seconds)

    POLY(PHENYLENE ETHERS) AND THEIR PREPARATION
    31.
    发明专利
    POLY(PHENYLENE ETHERS) AND THEIR PREPARATION 未知

    公开(公告)号：CA1257741A

    公开(公告)日：1989-07-18

    申请号：CA496352

    申请日：1985-11-27

    Applicant: BASF AG

    Inventor： MITULLA KONRAD ,  HAMBRECHT JUERGEN ,  TESCH HELMUT ,  SCHMITT BURGHARD ,  MAEDER HANSJOACHIM

    IPC: C08G65/44 ,  C08G65/48

    Abstract: Disclosed is a method of preparing high molecular weight polyphenylene ethers from monohydric phenols. According to this method, the phenols are subjected to an oxydative coupling reaction with oxygen to produce poly(phenylene ethers) which are subsequently reacted with an epoxide of the general formula (I) (I) where R1 and R2 can be identical or different and are each alkyl, cycloalkyl, aryl, aryloxy, alkoxy or carboxyalkyl, each of which may contain a furtehr epoxide group, or C3-C20-alkyl-substituted amino, or R1 is hydrogen and R2 is one of the above groups, or R1 and R2 form part of a cycloalkyl ring. The polyphenylene ethers that are so obtained, are completely blocked and have a high molecular weight, a pale intresic colour and a high stability to thermal and thermooxidative attack.

    34.
    发明专利
    未知

    公开(公告)号：DE19934144A1

    公开(公告)日：2001-02-01

    申请号：DE19934144

    申请日：1999-07-26

    Applicant: BASF AG

    Inventor： UHR HERMANN ,  VODRAZKA WOLFGANG ,  MITULLA KONRAD ,  DOSCH JUERGEN

    IPC: C07C7/12 ,  C07C7/13 ,  C07C15/02 ,  B01J29/00 ,  C07C2/02

    Abstract: The present invention relates to a method for purifying olefin-containing supply flows in polymerisation or alkylation processes, wherein said method involves feeding the supply flow through an adsorption layer. The invention also relates to methods for producing alkylbenzenes by the catalytic reaction of benzene and olefins fed through an adsorption layer.

    36.
    发明专利
    未知

    公开(公告)号：DE19908463A1

    公开(公告)日：2000-08-31

    申请号：DE19908463

    申请日：1999-02-26

    Applicant: BASF AG

    Inventor： MITULLA KONRAD ,  SUTORIS HEINZ FRIEDRICH

    IPC: B01D3/32 ,  C07B63/04 ,  C07C7/05 ,  C07C7/20 ,  C07C15/46

    Abstract: The invention relates to a method for the continuous recovery of styrene from a mixture containing same, by distillation of the mixture in a cascade of n distillation columns. According to said method, (i) an inflow containing a stabilizer system is fed into the first column and/or is placed into at least one of the distillation columns positioned upstream of the nth distillation column, whereby said stabilizer system comprises N-oxyl radicals; (ii) in the bottom of the nth distillation column a high-boiling fraction containing the stabilizer system and boiling at a higher temperature than styrene is concentrated; (iii) a partial flow of the high-boiling fraction is recycled and placed into at least one distillation column positioned upstream of the nth distillation column; and (iv) the remainder of the high-boiling fraction is withdrawn from the process.

    37.
    发明专利
    未知

    公开(公告)号：BR9810128A

    公开(公告)日：2000-08-08

    申请号：BR9810128

    申请日：1998-06-04

    Applicant: BASF AG

    Inventor： SUTORIS HEINZ FRIEDERICH ,  MITULLA KONRAD ,  DUPUIS JACQUES ,  KALIBA CLAUS

    IPC: C07B63/04 ,  C07C7/20 ,  C07C15/46 ,  C09K15/20 ,  C09K15/30 ,  C09K15/32

    Abstract: A mixture contains one or more vinyl-containing compounds as component (A) and, as a further component, a stabilizer (B) which contains one or more readily volatile nitroxyl compounds as component (b1), one or more sparingly volatile nitroxyl compounds as component (b2), if required one or more aromatic nitro compounds as component (b3) and, if required, one or more iron compounds as component (b4).Stabilizers (B) contain the components (b1) and (b2), (b1) and (b2) and (b3), (b1) and (b2) and (b4), and (b1), (b2), (b3) and (b4), and the premature polymerization of vinyl-containing compounds during their purification or distillation is inhibited by a process in which a stabilizer (B) is added or the components of stabilizer (B) are added as individual substances or in at least two groups of the components.

    Mixture of substances containing compounds with vinyl groups and stabilizers
    38.
    发明专利
    Mixture of substances containing compounds with vinyl groups and stabilizers 未知

    公开(公告)号：AU8435998A

    公开(公告)日：1999-01-04

    申请号：AU8435998

    申请日：1998-06-04

    Applicant: BASF AG

    Inventor： SUTORIS HEINZ FRIEDRICH ,  MITULLA KONRAD ,  DUPUIS JACQUES ,  KALIBA CLAUS

    IPC: C07B63/04 ,  C07C7/20 ,  C07C15/46 ,  C09K15/20 ,  C09K15/30 ,  C09K15/32

    Abstract: A mixture contains one or more vinyl-containing compounds as component (A) and, as a further component, a stabilizer (B) which contains one or more readily volatile nitroxyl compounds as component (b1), one or more sparingly volatile nitroxyl compounds as component (b2), if required one or more aromatic nitro compounds as component (b3) and, if required, one or more iron compounds as component (b4).Stabilizers (B) contain the components (b1) and (b2), (b1) and (b2) and (b3), (b1) and (b2) and (b4), and (b1), (b2), (b3) and (b4), and the premature polymerization of vinyl-containing compounds during their purification or distillation is inhibited by a process in which a stabilizer (B) is added or the components of stabilizer (B) are added as individual substances or in at least two groups of the components.

    N-OXIDOS DE 4-ACILAMINOPIPERIDINA.
    39.
    发明专利
    N-OXIDOS DE 4-ACILAMINOPIPERIDINA. 未知

    公开(公告)号：MX9706337A

    公开(公告)日：1998-07-31

    申请号：MX9706337

    申请日：1997-08-20

    Applicant: BASF AG

    Inventor： KOCH ANDREAS ,  AUMULLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

    IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

    Abstract: La presente invencion se refiere a los N-oxidos de 4-acilaminopiperidina la A+B (Ia) en donde A1 es hidrogeno o un radical orgánico y B1 es un radical IIa. (Ver Formula) en donde R1-R4 son cada uno alquilo de C1-C4, y, R1 y R2, por una parte, y R3 y R4, por otra parte, pueden además estar unidos para formar un anillo de 5 a 6 miembros, R5 es H o alquilo de C1-C4 y R6 es H o alquilo de C1-C18 se utilizan para estabilizar materiales orgánicos contra el efecto danino de los radicales libres, particularmente durante la destilacion de monomeros que sufre de polimerizacion por radicales libres, especialmente el estireno.

Patent Agency Ranking