公开(公告)号：DK101788D0

公开(公告)日：1988-02-26

申请号：DK101788

申请日：1988-02-26

Applicant: BASF AG

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

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.

公开(公告)号：AU7418387A

公开(公告)日：1987-12-17

申请号：AU7418387

申请日：1987-06-12

Applicant: BASF AG

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

IPC: D21H17/23 ,  D21H17/34 ,  D21H17/37 ,  D21H17/47 ,  D21H17/55 ,  D21H23/76 ,  D21H3/38

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：FI872610A

公开(公告)日：1987-12-15

申请号：FI872610

申请日：1987-06-11

Applicant: BASF AG

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

IPC: D21H17/23 ,  D21H17/34 ,  D21H17/37 ,  D21H17/47 ,  D21H17/55 ,  D21H23/76 ,  D21H

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：FI870486A0

公开(公告)日：1987-02-05

申请号：FI870486

申请日：1987-02-05

Applicant: BASF AG

Inventor： KROENER MICHAEL ,  SCHMIDT WILLI ,  OFTRING ALFRED ,  PROLL THEO ,  HARTMANN HEINRICH

IPC: C07C231/24 ,  C07C67/00 ,  C07C231/00 ,  C07C233/00 ,  C07C233/03 ,  C07C233/15 ,  C08F26/00 ,  C08F126/02 ,  C07C

公开(公告)号：NO863833D0

公开(公告)日：1986-09-25

申请号：NO863833

申请日：1986-09-25

Applicant: BASF AG

Inventor： PFOHL SIGBERG ,  KROENER MICHAEL ,  HARTMANN HEINRICH ,  DENZINGER WALTER

IPC: C08F8/12 ,  C08F16/16 ,  C08F18/02 ,  C08F20/52 ,  C08F26/00 ,  C08F26/06 ,  C08F216/16 ,  C08F216/18 ,  C08F218/02 ,  C08F218/04 ,  C08F218/08 ,  C08F218/10 ,  C08F220/00 ,  C08F220/02 ,  C08F220/10 ,  C08F220/18 ,  C08F220/42 ,  C08F220/56 ,  C08F226/02 ,  C08F226/10 ,  D21H17/34 ,  D21H17/36 ,  D21H17/37 ,  D21H17/45 ,  D21H21/18 ,  C08F ,  D21H

Abstract: Water-soluble copolymers containing copolymerized vinylamine units are prepared by copolymerizing (a) from 95 to 10 mol % of N-vinylformamide and (b) from 5 to 90 mol % of an ethylenically unsaturated monomer from the group consisting of vinyl acetate, vinyl propionate, C1-C4-alkyl vinyl ethers, the esters, nitriles and amides of acrylic acid and methacrylic acid and N-vinylpyrrolidone, and then eliminating from 30 to 100 mol % of the formyl groups from the copolymer. Preferred copolymers are copolymers of N-vinylformamide and vinyl acetate, in which from 30 to 100 mol % of the monomer units are hydrolyzed. The copolymers are used in papermaking to increase the dry strength and wet strength of the paper.

公开(公告)号：DK549585A

公开(公告)日：1986-05-30

申请号：DK549585

申请日：1985-11-28

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ ,  STECHER KARLHEINZ ,  KROENER MICHAEL ,  SCHNEIDER ROLF

IPC: C07C255/16 ,  C01C3/00 ,  C01C3/02 ,  C01C3/04 ,  C01C3/10 ,  C07C67/00 ,  C07C211/10 ,  C07C253/00 ,  C07C253/08 ,  C07C255/19 ,  C07C255/24 ,  C07C255/29 ,  C07C

Abstract: Reaction products of hydrogen cyanide are prepared by a process in which hydrogen cyanide prepared in a conventional manner by pyrolysis at from 250 DEG to 650 DEG C. over a solid under from 5 to 200 mbar is cooled to a temperature of from 200 DEG to -10 DEG C. together with the other pyrolysis products, the hydrogen cyanide is then fed to a chemisorption reaction with a base or with a carbonyl compound, and the reaction products of hydrogen cyanide which are formed therein are removed from the system and brought to atmospheric pressure. In this process, the handling of large amounts of hydrogen cyanide is avoided.

公开(公告)号：CA1183290A

公开(公告)日：1985-02-26

申请号：CA407066

申请日：1982-07-12

Applicant: BASF AG

Inventor： BURKERT HANS ,  BRUNNMUELLER FRIEDRICH ,  BEYER KARL-HEINZ ,  KROENER MICHAEL ,  MUELLER HANS

IPC: C08F8/00 ,  D21H17/34 ,  D21H17/45 ,  C02F1/56

Abstract: Sludges are flocculated by the addition of a polymer which is prepared by the homopolymerization of N-vinylformamide in the presence of a free-radical polymerization initiator to give a poly-N-vinylformamide, followed by hydrolysis of from 10 to 90% of the formyl groups in the poly-N-vinylformamide.

公开(公告)号：FI822102L

公开(公告)日：1983-01-19

申请号：FI822102

申请日：1982-06-11

Applicant: BASF AG

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

IPC: C08F8/00 ,  C08F226/02 ,  D21C9/18 ,  D21H17/34 ,  D21H17/45 ,  C08G

公开(公告)号：FI102687B1

公开(公告)日：1999-01-29

申请号：FI910206

申请日：1991-01-15

Applicant: BASF AG

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

IPC: C08F8/12 ,  D21H17/34 ,  D21H17/36 ,  D21H21/18

公开(公告)号：ES2098969T3

公开(公告)日：1997-05-01

申请号：ES94920465

申请日：1994-06-27

Applicant: BASF AG

Inventor： DENZINGER WALTER ,  HARTMANN HEINRICH ,  KROENER MICHAEL ,  NILZ CLAUDIA

IPC: C08F6/00 ,  C08F6/16 ,  C08F8/06 ,  C08F8/12 ,  C08F6/10 ,  C08F26/02 ,  D21H21/10

Abstract: PCT No. PCT/EP94/02082 Sec. 371 Date Jan. 11, 1996 Sec. 102(e) Date Jan. 11, 1996 PCT Filed Jun. 27, 1994 PCT Pub. No. WO95/02615 PCT Pub. Date Jan. 26, 1995Nitrile impurities are eliminated from polymers which contain acyclic N-vinyl-carboxamide and/or vinylamine units by treating the polymers with at least one oxidizing agent a) with exposure to light and/or b) in the presence of heavy metal ions.