公开(公告)号：DD146948A5

公开(公告)日：1981-03-11

申请号：DD21689679

申请日：1979-11-14

Applicant: BASF AG

Inventor： LINHARDT FRIEDRICH ,  EICKEN KARL ,  GIRGENSOHN BJOERN ,  RICHARZ WINFRIED

IPC: C07D231/12 ,  C07D231/14 ,  C07D231/18 ,  C07D231/20 ,  C07D521/00

Abstract: 1. A process for the preparation of substantially pure pyrazole compounds of the general formula see diagramm : EP0012216,P9,F1 where R is hydrogen, halogen, alkyl of up to 5 carbon atoms, alkoxy of up to 3 carbon atoms, perhaloalkyl of up to 3 carbon atoms or alkoxyalkyl of up to 5 carbon atoms, R**1 is hydrogen, halogen, alkyl of up to 5 carbon atoms, alkoxy of up to 3 carbon atoms, perhaloalkyl of up to 3 carbon atoms or alkoxyalkyl of up to 5 carbon atoms, R**2 is hydrogen, halogen, alkyl of up to 5 carbon atoms, alkoxy of up to 3 carbon atoms, perhaloalkyl of up to 3 carbon atoms or alkoxyalkyl of up to 5 carbon atoms, or R**2 together with R is an ortholinked alkylene chain of up to 6 carbon atoms which is unsubstituted or substituted by alkyl of up to 4 carbon atoms, X is chlorine or bromine, and R**3 and R**4 are identical or different and each is hydrogen, alkyl, alkoxy, alkylthio, carbalkoxy or perfluoroalkyl, in each case of up to 4 carbon atoms, or halogen, phenyl, cyano or carboxyl, from the corresponding crude products, characterized in that the crude products are treated with 30 to 90% by weight aqueous solutions of strong acids, thereafter the aqueous solution is separated off and diluted with water, and the pure product which hereupon precipitates is separated from the aqueous fluid.

公开(公告)号：DE4127733A1

公开(公告)日：1993-02-25

申请号：DE4127733

申请日：1991-08-22

Applicant: BASF AG

Inventor： HARTMANN HEINRICH ,  DENZINGER WALTER ,  KROENER MICHAEL ,  NILZ CLAUDIA ,  LINHARDT FRIEDRICH ,  STANGE ANDREAS

IPC: C08F251/02 ,  C08F251/00 ,  D21H17/34 ,  D21H17/35 ,  D21H17/37 ,  D21H21/18

Abstract: (1) Graft polymers (I) obtainable by polymerisation of (A) monomers or monomer mixts. comprising (A1) 10-100 % (all pts. wt.) N-vinylcarboxylic amides. CH2=CH-N(R2)C(O)R' (1), where R1, R2 = H or 1-6 C alkyl (A2) 0-90 % other monoethylenically unsatd., carboxylic gp.-free monomer copolymerisation with (A1) (A3) 0-5 % monomer with at least 2 ethylenically unsatd., non-conjugated double bonds in mol. in presence of (B) mono-, oligo-, or poly-saccharide; oxidatively, hydrolytically, or enzymatically degraded polysaccharide; oxidatively-hydrolytically or oxidatively-enzymatically degraded polysaccharide; chemically modified mono-, oligo-, or poly-sacchardie, or mixt. of these in ratio (A):(B) = 95-20:5-80 and op. subsequent splitting off of gp. -C(:O)R1 from polymerised monomers (A) of (I) with formation of units -CH2-CNHR2H- are claimed. (2) Also claimed are (I) obtainable by process wherein mixt. of 1-99 % N-vinylformamide (II) and 99-1 % vinyl acetate (III) is used as (A), 2-100 % formyl gps. of polymerised (II) are split off with formation of units -CH2-C(NH2)H- (3) and 2-100 % acetate gps. of polymerisated (III) and split off with formation of units -CH20C(OH)H- (4). USE/ADVANTAGE - Dry- and wet-stength agents in prepn. of paper, carboard, and paperboard, (I), prepd. partly with renewable raw materials, are less expensi