公开(公告)号：DE19638594A1

公开(公告)日：1998-03-26

申请号：DE19638594

申请日：1996-09-20

Applicant: BASF AG

Inventor： LINHART FRIEDRICH DR ,  NIESSNER MANFRED DR ,  RUEBENACKER MARTIN DR ,  NILZ CLAUDIA DR

IPC: B01J20/26 ,  C02F1/28 ,  C08F8/12 ,  D21C5/02 ,  D21C11/00 ,  D21F1/66 ,  C08F226/02 ,  D21C9/08

Abstract: This invention concerns a process for cleaning wastewater and recirculating water in paper production, de-inking and bleaching of pulp. This process involves adsorption of water-soluble anionic compounds and compounds dispersed in water from the wastewater and recirculating water onto fine-particle adsorption agents consisting of insoluble polymers which swell to a very limited extent and contain vinylamine units which have been incorporated by polymerization. This invention further concerns the use of these polymers as adsorption agents for cleaning water recirculation systems in the production of paper and for cleaning paper machine wastewater and discharge from the de-inking process and from pulp bleaching.

公开(公告)号：DE19627553A1

公开(公告)日：1998-01-15

申请号：DE19627553

申请日：1996-07-09

Applicant: BASF AG

Inventor： DYLLICK-BRENZINGER RAINER DR ,  MEIXNER HUBERT DR ,  LINHART FRIEDRICH DR ,  MOENCH DIETMAR DR ,  GERBER KLAUS-DIETER ,  DIRKS BERND ,  BAUMANN PETER

IPC: D21H17/45 ,  D21H17/29 ,  D21H17/37 ,  D21H17/56 ,  D21H17/68 ,  D21H23/14 ,  D21C9/18 ,  D21F1/82 ,  D21H17/44

Abstract: The invention relates to a process for producing paper and cardboard by dehydration of pulps, forming sheets and drying said sheets. Polyethylene imines of a molar mass Mw of greater than 500 000 or polymers containing vinyl amine units and having a molar mass of 5000 to 3 million are added to the pulps and subsequently, polymers containing cationic polyacrylic amides or vinyl amine units are added to said pulps, the molar masses Mw of the polymers being at least 4 million in each case. The pulp is then subjected to at least one shearing stage and flocculates by addition of bentonite, colloidal silicic acid or clay.

公开(公告)号：AT93625T

公开(公告)日：1993-09-15

申请号：AT89110565

申请日：1989-06-10

Applicant: BASF AG

Inventor： HEMEL RALF ,  LINHART FRIEDRICH DR

IPC: G01N15/06 ,  C02F1/52 ,  G01N1/10 ,  G01N15/14

公开(公告)号：DE3764407D1

公开(公告)日：1990-09-27

申请号：DE3764407

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

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：DE19715832A1

公开(公告)日：1998-10-22

申请号：DE19715832

申请日：1997-04-16

Applicant: BASF AG

Inventor： LINHART FRIEDRICH DR ,  MELZER JAROSLAV ,  MEIXNER HUBERT DR

IPC: D21H17/56 ,  D21H21/02 ,  D21C9/08 ,  D21H17/33

Abstract: The invention relates to a method for producing, paper, pulpboard and cardboard from paper pulp containing sticky impurities by adding surfactants and cationic polymers with a load density of at least 1.5 meq/g (measured at pH 7) and a cationic polymer molar mass Mw of at least 15,000, and by dehydrating the pulp and fixing the sticky impurities in the finished paper.

公开(公告)号：DE4241117A1

公开(公告)日：1994-06-09

申请号：DE4241117

申请日：1992-12-07

Applicant: BASF AG

Inventor： NILZ CLAUDIA DR ,  DENZINGER WALTER ,  HARTMANN HEINRICH DR ,  KROENER MICHAEL DR ,  LINHART FRIEDRICH DR ,  SCHUHMACHER RUDOLF DR ,  MOENCH DIETMAR DR ,  STANGE ANDREAS DR

IPC: C08F220/04 ,  C08F8/12 ,  C08F26/00 ,  C08F226/02 ,  D21H17/34 ,  D21H17/37 ,  D21H17/43 ,  D21H17/45 ,  D21H21/10 ,  D21H21/18 ,  D21H21/20

公开(公告)号：ES2050350T3

公开(公告)日：1994-05-16

申请号：ES90125089

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：DE59003890D1

公开(公告)日：1994-01-27

申请号：DE59003890

申请日：1990-12-13

Applicant: BASF AG

Inventor： AUHORN WERNER ,  LINHART FRIEDRICH DR ,  LORENCAK PRIMOZ DR ,  KROENER MICHAEL DR ,  SENDHOFF NORBERT DR ,  DENZINGER WALTER ,  HARTMANN HEINRICH DR

IPC: C08F8/12 ,  D21H17/34 ,  D21H17/36

公开(公告)号：DE4105919A1

公开(公告)日：1992-08-27

申请号：DE4105919

申请日：1991-02-26

Applicant: BASF AG

Inventor： PFOHL SIGBERG DR ,  AUHORN WERNER ,  STANGE ANDREAS DR ,  LINHART FRIEDRICH DR

IPC: D21H17/37 ,  D21H17/56 ,  D21H17/69

Abstract: Aqueous sludges of finely-ground fillers that are at least partially coated with polymers are produced by successively adding to an aqueous filler sludge 0.1 to 5 wt % of a cationic paper consolidating agent, 0.1 to 5 wt % of a non-ionic and/or anionic paper consolidating and/or sizing agent, with respect to the weight of fillers. The cationic consolidating agent is used in such an amount, with respect to the anionic consolidating and/or sizing agents, that the finely-ground fillers have a cationic charge. Also disclosed is the use of the thus obtained aqueous sludges of finely-ground fillers for producing filler-containing paper, cardboard and/or paperboard by adding the aqueous sludges to a paper pulp and by draining the paper pulp.

公开(公告)号：DE3443461A1

公开(公告)日：1986-05-28

申请号：DE3443461

申请日：1984-11-29

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