公开(公告)号：DE10036018A1

公开(公告)日：2002-02-07

申请号：DE10036018

申请日：2000-07-25

Applicant: BASF AG

Inventor： DYLLICK-BRENZINGER RAINER ,  WINTER MANFRED

IPC: C08F8/12 ,  C08F6/06 ,  C08F6/12 ,  C08F26/02

Abstract: The invention relates to a method for producing aqueous solutions with a low salt content from polymers containing vinylamine units. The method involves treating aqueous solutions of hydrolysed polymers containing N-vinylformamide units with a solvent mixture containing (a) acetone and (b) an alcohol from the group comprising methanol, ethanol, n-propanol, isopropanol and mixtures thereof, in a weight ratio (a):(b) from 1:1 to 10:1, whereby 0.05 to 0.5 wt. part aqueous polymer solution is used to 1 wt. part solvent mixture. The inventive method also involves cooling the obtained mixture to a temperature of 0 DEG C or below and cristallising the neutral salt; separating the neutral salt; and distilling off the solvent.

公开(公告)号：ES2112050T3

公开(公告)日：1998-03-16

申请号：ES95912254

申请日：1995-03-20

Applicant: BASF AG

Inventor： NILZ CLAUDIA ,  WINTER MANFRED ,  KRONER MICHAEL ,  STANGE ANDREAS ,  SCHUHMACHER RUDOLF

IPC: C08F8/12 ,  D21H17/34 ,  D21H21/18 ,  D21H21/20

Abstract: PCT No. PCT/EP95/01030 Sec. 371 Date Sep. 30, 1996 Sec. 102(e) Date Sep. 30, 1996 PCT Filed Mar. 20, 1995 PCT Pub. No. WO95/26989 PCT Pub. Date Oct. 12, 1995Solutions of polymers containing vinylamine units, which solutions have a long shelf life, are prepared by hydrolyzing polymers containing N-vinylcarboxamide units with acids in an aqueous medium and removing the carboxylic acids eliminated from the polymers as esters from the aqueous polymer solution after the hydrolysis by adding at least stoichiometric amounts of at least one C1-C6-alcohol and distilling off the esters from the reaction mixture, and said aqueous solutions are used as dry and wet strength agents in papermaking.

公开(公告)号：DE4411311A1

公开(公告)日：1995-10-05

申请号：DE4411311

申请日：1994-03-31

Applicant: BASF AG

Inventor： NILZ CLAUDIA DR ,  WINTER MANFRED ,  KROENER MICHAEL DR ,  STANGE ANDREAS DR ,  SCHUHMACHER RUDOLF DR

IPC: C08F8/12 ,  D21H17/34 ,  D21H21/18 ,  D21H21/20 ,  C08F126/02

Abstract: A process for producing long-shelf-life aqueous solutions of vinyl-amine-unit-containing polymers by the hydrolysis of N-vinyl-carbonamide-containing polymers with acids in an aqueous medium and removing the carboxylic acids separated from the polymers as esters from the aqueous polymer solution following hydrolysis and by the addition of at least stoichiometric quantities of at least one C1 to C6 alcohol and distilling the esters off from the reaction mixture. The invention also relates to the use of the long-shelf-life aqueous solutions of vinyl-amine-unit-containing polymers as dry and wet consolidating agents in paper manufacture.

公开(公告)号：MX2007006268A

公开(公告)日：2007-06-14

申请号：MX2007006268

申请日：2005-11-29

Applicant: BASF AG

Inventor： RUBENACKER MARTIN ,  RAULS MATTHIAS ,  JUDAT BERND ,  WINTER MANFRED

IPC: C07C231/24 ,  C07C233/03

Abstract: Metodo para purificar un compuesto de N-vinilo de cadena abierta por cristalizacion en un cristalizador, la cristalizacion se lleva a cabo de un fundido de una mezcla que comprende compuesto de N-vinilo de cadena abierta a una presion de 0.001 a 407.888 kgf/cm2 (10 a 400 bar).

公开(公告)号：CA2466292A1

公开(公告)日：2003-06-05

申请号：CA2466292

申请日：2002-11-19

Applicant: BASF AG

Inventor： ETTL ROLAND ,  GRIMM GUENTHER ,  KESSLER THOMAS ,  WINTER MANFRED ,  FREUND TORSTEN

IPC: C07D315/00 ,  C07D305/10

Abstract: The invention relates to a method for producing alkyl ketene dimers by reacting carboxylic acid chlorides with tertiary amines in a molar ratio of between 1: 1 and 1: 1.6 at temperatures of between 65 and 150 ~C and with a residence time of between 1 and 30 mins in the absence of solvents. Said reaction partners are intensively mixed and the alkyl ketene dimers are separated from the reaction mixture.

公开(公告)号：DE10138553A1

公开(公告)日：2003-05-28

申请号：DE10138553

申请日：2001-08-06

Applicant: BASF AG

Inventor： BASLER PETER ,  SIEGEL WOLFGANG ,  ACHHAMMER GUENTHER ,  NEGELE ANTON ,  MENIG HELMUTH ,  WINTER MANFRED ,  RUPPEL WILHELM ,  RESCH PETER ,  ZEHNER PETER ,  LUYKEN HERMANN ,  SCHINDLER GOETZ-PETER ,  VOGT VOLKER

IPC: B01J19/30 ,  B01J19/32 ,  B01J23/745 ,  C01C3/02

Abstract: Hydrogen cyanide (hydrocyanic acid) production by dehydration of gaseous formamide in presence of atmospheric oxygen is effected using a catalyst containing metallic iron or iron oxide. An Independent claim is also included for use of ordered packings of steel and iron oxide on an aluminum oxide carrier as catalyst in hydrogen cyanide production by dehydration of gaseous formamide containing atmospheric oxygen.

公开(公告)号：CA2186782A1

公开(公告)日：1995-10-12

申请号：CA2186782

申请日：1995-03-20

Applicant: BASF AG

Inventor： NILZ CLAUDIA ,  WINTER MANFRED ,  KROENER MICHAEL ,  STANGE ANDREAS ,  SCHUHMACHER RUDOLF

IPC: C08F8/12 ,  D21H17/34 ,  D21H21/18 ,  D21H21/20 ,  C08F126/02

Abstract: A process for producing long-shelf-life aqueous solutions of vinyl-amine-unit-containing polymers by the hydrolysis of N-vinyl-carbonamide-containing polymers with acids in an aqueous medium and removing the carboxylic acids separated from the polymers as esters from the aqueous polymer solution following hydrolysis and by the addition of at least stoichiometric quantities of at least one C1 to C6 alcohol and distilling the esters off from the reaction mixture. The invention also relates to the use of the long-shelf-life aqueous solutions of vinyl-amine-unit-containing polymers as dry and wet consolidating agents in paper manufacture.

公开(公告)号：DE4223805A1

公开(公告)日：1993-01-28

申请号：DE4223805

申请日：1992-07-20

Applicant: BASF AG

Inventor： BURST WOLFRAM ,  WINTER MANFRED

IPC: B01F15/06 ,  B65D6/10

Abstract: Mixing vessel of a stirrer comprises a double skinned pan (1,2) and connecting nozzles (6) to allow passage of a heating or cooling medium. Novelty is that the flow annulus (3) is divided by partitions (4) into vertical segments (5) each possessing two flow connections (6). Jacket segments are preferably of differing sizes to allow matching with operating volume and specific properties required by individual materials and batch sizes. USE/ADVANTAGE - Avoidance of scale up problems, which could lead to crystal deposition, baked-on solids, etc. by provision of a stepwise variable, jacketted heat transfer area.