公开(公告)号：DE3927812A1

公开(公告)日：1991-02-28

申请号：DE3927812

申请日：1989-08-23

Applicant: BASF AG

Inventor： FLORY KLAUS DR ,  STANGE ANDREAS DR ,  KROENER MICHAEL DR ,  SENDHOFF NORBERT DR

IPC: C08G12/12 ,  C08G12/46 ,  D21H17/49 ,  D21H17/50

Abstract: Cationic urea formaldehyde resins are obtained by condensation of urea and formaldehyde in a molar ratio of 1:1.5 to 3 in the presence of at least 1 mol% of polymerizates, obtained by polymerization of vinyl amine units, with Fikentscher K values of 5 to 300 in a quantity of 5 to 100 g/mol of urea in the end-product. The mixture is first a) precondensed at a pH of 8 to 14, then acidified and b) condensed at a pH of 1 to 5 until the onset of gel formation, c) 0.3 to 1.5 mol of formaldehyde per mol of urea used is added, d) subsequent condensation is carried out and e) the resin solution is then neutralized. The resins so obtained are used as additives in paper manufacture to increase the dry and wet strength of paper and reduce the loss of opacity of the whiteness of the paper.

公开(公告)号：DE3675593D1

公开(公告)日：1990-12-20

申请号：DE3675593

申请日：1986-06-14

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG DR ,  KROENER MICHAEL DR ,  KROETZSCH PETER DR ,  BIFFAR WERNER DR

IPC: B01J12/00 ,  B01J15/00 ,  B01J16/00 ,  B01J35/04

Abstract: A novel fixed-bed catalyst structure obtained using honeycomb elements, for highly exothermic and endothermic chemical reactions, wherein the required heat exchange, both in the liquid phase and in the gas phase, is forcibly effected in the fixed catalyst bed by means of static mixing elements made of inert ceramic and/or metallic material or completely of catalyst material, between the individual honeycomb elements.

公开(公告)号：DE3667516D1

公开(公告)日：1990-01-18

申请号：DE3667516

申请日：1986-02-20

Applicant: BASF AG

Inventor： PFOHL SIGBERG DR ,  HARTMANN HEINRICH DR ,  FREY GUENTER DR ,  KROENER MICHAEL DR ,  GUTH KLAUS

IPC: C08L33/02 ,  C08L33/00 ,  C08L33/18 ,  C08L33/20 ,  C08L33/24 ,  C08L33/26 ,  D21H17/34 ,  D21H17/37 ,  D21H17/43 ,  D21H17/45 ,  D21H21/20 ,  D21D3/00 ,  D21H3/38

公开(公告)号：DE3620065A1

公开(公告)日：1987-12-17

申请号：DE3620065

申请日：1986-06-14

Applicant: BASF AG

Inventor： LINHART FRIEDRICH DR ,  DEGEN HANS-JUERGEN DR ,  AUHORN WERNER ,  KROENER MICHAEL DR ,  HARTMANN HEINRICH DR ,  HEIDE WILFRIED DR

IPC: D21H17/23 ,  D21H17/34 ,  D21H17/37 ,  D21H17/47 ,  D21H17/55 ,  D21H23/76 ,  D21H3/58 ,  D21H3/82 ,  B01D21/01

Abstract: Paper, board and cardboard are produced by draining a pulp slurry in the presence of high molecular weight, water-soluble polymers of N-vinylamides as drainage aids, retention agents and flocculants. These polymers are particularly effective in a pulp slurry which has a high content of interfering substances and other phenolic compounds.

公开(公告)号：DE3367093D1

公开(公告)日：1986-11-27

申请号：DE3367093

申请日：1983-11-07

Applicant: BASF AG

Inventor： KROENER MICHAEL DR ,  SCHENK WALTER DR

IPC: C07D241/16 ,  C07D241/18 ,  C07D241/20 ,  C07D241/24

公开(公告)号：DE3506832A1

公开(公告)日：1986-08-28

申请号：DE3506832

申请日：1985-02-27

Applicant: BASF AG

Inventor： PFOHL SIGBERG DR ,  HARTMANN HEINRICH DR ,  FREY GUENTER DR ,  KROENER MICHAEL DR ,  GUTH KLAUS

IPC: C08L33/02 ,  C08L33/00 ,  C08L33/18 ,  C08L33/20 ,  C08L33/24 ,  C08L33/26 ,  D21H17/34 ,  D21H17/37 ,  D21H17/43 ,  D21H17/45 ,  D21H21/20 ,  D21H3/36 ,  D21H3/44 ,  D21H3/46 ,  D21H3/54

公开(公告)号：DE3263525D1

公开(公告)日：1985-06-20

申请号：DE3263525

申请日：1982-07-07

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ DR ,  SCHNEIDER ROLF DR ,  KROENER MICHAEL DR ,  MUELLER HANS DR ,  LINHART FRIEDRICH DR ,  BURKERT HANS DR ,  BEYER KARL-HEINZ DR

IPC: C08F8/00 ,  C08F226/02 ,  D21C9/18 ,  D21H17/34 ,  D21H17/45

公开(公告)号：AT13305T

公开(公告)日：1985-06-15

申请号：AT82106043

申请日：1982-07-07

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ DR ,  SCHNEIDER ROLF DR ,  KROENER MICHAEL DR ,  MUELLER HANS DR ,  LINHART FRIEDRICH DR ,  BURKERT HANS DR ,  BEYER KARL-HEINZ DR

IPC: C08F8/00 ,  C08F226/02 ,  D21C9/18

公开(公告)号：DE3066196D1

公开(公告)日：1984-02-23

申请号：DE3066196

申请日：1980-10-16

Applicant: BASF AG

Inventor： SCHOCH WERNER DR ,  KROENER MICHAEL DR ,  WIDDER RUDI DR

IPC: C07C47/52 ,  C07C45/00 ,  C07C45/42 ,  C07C45/56 ,  C07C67/00

Abstract: In a process for the preparation of aromatic monoaldehydes by reacting monochlorinated methylaromatics with hexamethylenetetramine by a Sommelet reaction, the improvement that in place of pure chloromethylaromatics the chlorination mixtures produced by photochlorination of the methylaromatics are employed and are treated with hexamethylenetetramine without prior working up, after which the Sommelet reaction is allowed to take place.