公开(公告)号：DE19617530A1

公开(公告)日：1998-03-26

申请号：DE19617530

申请日：1996-05-02

Applicant: BASF AG

Inventor： DUPUIS JACQUES DR ,  TRUEBENBACH PETER DR ,  SCHWAB EKKEHARD DR ,  KROENER MICHAEL DR

IPC: B01J19/30 ,  B01J21/04 ,  B01J35/02 ,  B01J37/00 ,  C07C231/12 ,  C07C233/03 ,  B01J23/02 ,  B01J27/232

Abstract: A silica-free, alpha -alumina containing catalyst support (I) is in the form of a hollow body in which at least part of the outer wall is cut through. Also claimed are: (i) a catalyst (II) consisting of alkali or alkaline earth metal(s) on support (I), (ii) production of (I) by forming a mixture of (A) a powder containing at least 95 wt% alpha -alumina and (B) a polymeric binder, removing the binder (B) and presintering the moulded product; (iii) production of catalyst (II) by making the formed support as in (ii), impregnating with solution(s) of metal salt(s) (as in i) and drying the impregnated support, and (iv) a silica-free, alpha -alumina containing catalyst (II) made by process (iii).

公开(公告)号：DE59005019D1

公开(公告)日：1994-04-21

申请号：DE59005019

申请日：1990-12-21

Applicant: BASF AG

Inventor： FREUDENBERG ENRIQUE DR ,  LINHART FRIEDRICH DR ,  TRESCH RAINER ,  HARTMANN HEINRICH DR ,  DENZINGER WALTER ,  KROENER MICHAEL DR ,  SENDHOFF NORBERT DR

IPC: D21H21/04 ,  D21H17/34 ,  D21H17/37 ,  D21H17/41 ,  D21H21/10 ,  D21H27/00

Abstract: In a process for making paper, paperboard and cardboard, paper pulps containing interfering materials are dehydrated in the presence of polymers which, as characteristic constituents, contain copolymerised units of the formulae … … with R and R = H or C1- to C3-alkyl, and have K values of at least 130, the polymers containing less than 10 mol% of units of formula II.

公开(公告)号：DE3586046D1

公开(公告)日：1992-06-17

申请号：DE3586046

申请日：1985-11-21

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ DR ,  KROENER MICHAEL DR ,  HARTMANN HEINRICH DR ,  LINHART FRIEDRICH DR ,  PFITZNER KLAUS DR

IPC: C08F8/00 ,  C08F8/12 ,  C08F26/00 ,  C08F26/02

Abstract: Linear polymers (I) contg. units of formula -CH2-CH(NH2)-and having Fikentscher K value (in 0.5% aq. NaCl at 25 deg. C) 10-200 are prepd. in powder form by reacting a powdered polymer -CH2CH(NHCHO)- (II) of N-vinylformamide with a gaseous-hydrogen halide acid at up to 200 deg. C in presence of max. 5% water on wt. (II). Pref. (III) is reacted with HCl or HBr in presence of max. 2.5 wt.% water, partic. in absence of water. Reaction is carried out in inert solvent which does not dissol-e (I) and (II) particles, esp. dioxan, terahydrofuran, or cyclohexane. Or reaction is carried out in a 1-8C alcohol, partic. with inert suspending agent also present. Particle size (II) is 10-1000, partic. 50-400 microns. Reaction temp. is 35-150 deg. C.

公开(公告)号：AT76083T

公开(公告)日：1992-05-15

申请号：AT85114796

申请日：1985-11-21

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ DR ,  KROENER MICHAEL DR ,  HARTMANN HEINRICH DR ,  LINHART FRIEDRICH DR ,  PFITZNER KLAUS DR

IPC: C08F8/00 ,  C08F8/12 ,  C08F26/00 ,  C08F26/02

公开(公告)号：DE3864938D1

公开(公告)日：1991-10-24

申请号：DE3864938

申请日：1988-07-19

Applicant: BASF AG

Inventor： STANGE ANDREAS DR ,  DEGEN HANS-JUERGEN DR ,  AUHORN WERNER ,  WEBERNDOERFER VOLKMAR DR ,  KROENER MICHAEL DR ,  HARTMANN HEINRICH DR

IPC: D21H17/34 ,  D21H17/28 ,  D21H17/45 ,  D21H21/18

Abstract: In the prodn. of paper, paperboard and cardboard with high dry strength by adding a dry strength agent (I) to the pulp and dewatering, with sheet formation, the novelty is that (I) is an aq. soln. of mixts. of enzymatically degraded starches (II) with a viscosity of 20-2000 mPa.s (in 7.5% aq. soln. at 45 deg.C) and cationic polymers (III) derived from (a) diallyldimethylammonium chloride (IV), (b) N-vinylamine (V) or (c) N-vinylimidazolines of the formula (VI). R1 = H, 1-18C alkyl or C6H3R5R6; R5 and R6 = H, 1-4C alkyl or Cl; R2 = H, 1-18C alkyl, benzyl or glycidyl; R3 and R4 = H or 1-4C alkyl; X(-) = an acid gp.; which have a Fikentscher K value of min. 30 (In 5% aq. NaCl soln. at 25 deg.C and polymer concn. of 0.5wt.%).

公开(公告)号：DE4007311A1

公开(公告)日：1991-09-12

申请号：DE4007311

申请日：1990-03-08

Applicant: BASF AG

Inventor： HARTMANN HEINRICH DR ,  MOENCH DIETMAR DR ,  DENZINGER WALTER ,  KROENER MICHAEL DR ,  SENDHOFF NORBERT DR ,  FREUDENBERG ENRIQUE DR

IPC: C08F8/12 ,  C08F26/00 ,  C08F26/02 ,  D21H17/34

Abstract: Hydrolysed polymers (I), in powder form, contg vinylamine units of formula are obtd by hydrolysing polymerisates (II) contg polymerised N-vinylformamide units as powder in inert suspending agent in presence of acid or base then isolating (I), water content of (II) at beginning of hydrolysis being 6-90 wt%. USE/ADVANTAGE - (I) particles, treated with finely divided inorganic solids, as dewatering, retention, or flocculating agent in mfr of paper (claimed). (II) particles are substantially homogenously hydrolysed, whereas in process of US4623699 hydrolysing agent diffuses only slowly into hard (II) particle, leaving core of unhydrolysed polyvinyl formamide, and (I) dissolve more rapidly in water.

公开(公告)号：DE3942575A1

公开(公告)日：1991-06-27

申请号：DE3942575

申请日：1989-12-22

Applicant: BASF AG

Inventor： FIKENTSCHER ROLF DR ,  KROENER MICHAEL DR

IPC: B01J31/02 ,  B01J31/04 ,  C07B61/00 ,  C07C253/30 ,  C07C255/29

Abstract: Process for the preparation of alpha -formylaminonitriles of the general formula I … … in which the radicals R and R represent hydrogen, or hydrogen and aliphatic or heteroaliphatic radicals which have 1 to 10, cycloaliphatic or heterocycloaliphatic radicals which have 3 to 6, araliphatic radicals which have 7 to 12, heteroaraliphatic radicals which have 4 to 12, aromatic radicals which have 6 to 10, or heteroaromatic radicals which have 3 to 10, carbon atoms and which are unsubstituted or substituted by substituents which are inert under the reaction conditions, by reacting cyanohydrins of the general formula II … … with formamide III … … in the presence of acids, by adding at least one ammonium salt to the reaction mixture.

公开(公告)号：AT55789T

公开(公告)日：1990-09-15

申请号：AT87108446

申请日：1987-06-11

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

公开(公告)号：AT43334T

公开(公告)日：1989-06-15

申请号：AT85114755

申请日：1985-11-21

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ DR ,  KROENER MICHAEL DR ,  GOETZE WALTER DR

IPC: C07B61/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C231/08 ,  C07C231/12 ,  C07C233/03 ,  C07C102/08 ,  C07C103/365

公开(公告)号：DE3706525A1

公开(公告)日：1988-09-08

申请号：DE3706525

申请日：1987-02-28

Applicant: BASF AG

Inventor： DEGEN HANS-JUERGEN DR ,  PFOHL SIGBERG DR ,  WEBERNDOERFER VOLKMAR DR ,  REHMER GERD DR ,  KROENER MICHAEL DR ,  STANGE ANDREAS DR

IPC: D21H17/34 ,  D21H17/28 ,  D21H17/29 ,  D21H17/37 ,  D21H17/45 ,  D21H17/56 ,  D21H21/18 ,  D21H3/28

Abstract: Paper and paperboard of high dry strength are produced by adding a dry strength enhancer to the paper stock and dewatering the paper stock with sheet formation by using as the dry strength enhancer a mixture of a cationic polymer which contains as characteristic monomers copolymerized units of (a) diallyldimethylammonium chloride, (b) N-vinylamine or (c) a substituted or unsubstituted N-vinylimidazoline and has a K value of not less than 30, and natural potato starch which is converted into a water-soluble form by heating in an aqueous medium at above the gelatinization temperature of natural potato starch in the absence of any oxidizing agents or alkali.