公开(公告)号：CH595403A5

公开(公告)日：1978-02-15

申请号：CH975075

申请日：1975-07-25

Applicant: BASF AG

Inventor： DOERFEL HELMUT DR ,  SCHMIDT FRANZ DR ,  SCHUETTE WILHELM DR ,  CORDES CLAUS DR ,  SCHENK WOLFGANG DR

IPC: C08G2/00 ,  C08G2/28

Abstract: Method of removing odorous formaldehyde from stabilized shaped polyoxymethylenes in which an inert gas is caused to flow over stabilized and shaped solid polyoxymethylenes at elevated temperatures not high enough to cause sticking or fusion of the polyoxymethylene, until substantially all of the volatile formaldehyde has been removed.

公开(公告)号：DE2261065A1

公开(公告)日：1974-06-27

申请号：DE2261065

申请日：1972-12-14

Applicant: BASF AG

Inventor： WOERNER FRANK PETER DR ,  POHLEMANN HEINZ DR ,  DOERFEL HELMUT DR ,  FALKENSTEIN GEORG DR

IPC: C08G18/00 ,  C07C67/00 ,  C07C239/00 ,  C07C273/18 ,  C07C275/62 ,  C08G18/32 ,  C08G18/78 ,  C08G18/80 ,  C08G33/02 ,  C08G22/02

公开(公告)号：CH437291A

公开(公告)日：1967-06-15

申请号：CH1527464

申请日：1964-11-26

Applicant: BASF AG

Inventor： DOERFEL HELMUT DR

IPC: C07D201/16 ,  C08G69/24 ,  C07D27/08

公开(公告)号：DE3061394D1

公开(公告)日：1983-01-27

申请号：DE3061394

申请日：1980-03-25

Applicant: BASF AG

Inventor： NAARMANN HERBERT DR ,  PENZIEN KLAUS DR ,  DOERFEL HELMUT DR ,  ECKELL ALBRECHT DR

IPC: C08F4/60 ,  C08F238/00 ,  C08F238/02

Abstract: A process for the preparation of acetylene copolymers by catalytic polymerization of a mixture of acetylene and dialkynes or polyalkynes, using Ziegler catalysts. The novel polymers may be used as colored pigments, as colored coatings for metal, glass or plastics, and for the production of electrical or magnetic components.

公开(公告)号：DE1720281A1

公开(公告)日：1971-06-09

申请号：DE1720281

申请日：1967-07-05

Applicant: BASF AG

Inventor： STEINHOFER ADOLF PROF DR ,  PATSCH MANFRED DR ,  DOERFEL HELMUT DR ,  FALKENSTEIN GEORG DR ,  JESERICH WOLFGANG-DIETER DR

IPC: C08G69/20 ,  C08G20/18

公开(公告)号：CH466922A

公开(公告)日：1968-12-31

申请号：CH1648465

申请日：1965-11-30

Applicant: BASF AG

Inventor： KUNDE JOACHIM DR ,  WILHELM HANS DR ,  DOERFEL HELMUT DR

IPC: C08G18/10 ,  C08G18/42 ,  C08G22/12 ,  C08G53/14 ,  D01F7/04

公开(公告)号：CH460334A

公开(公告)日：1968-07-31

申请号：CH1717666

申请日：1966-12-01

Applicant: BASF AG

Inventor： KUNDE JOACHIM DR ,  WILHELM HANS DR ,  DOERFEL HELMUT DR ,  RAUCH KONRAD DR

IPC: C08G18/10 ,  C08G18/42

公开(公告)号：AT263368B

公开(公告)日：1968-07-25

申请号：AT1116066

申请日：1966-12-02

Applicant: BASF AG

Inventor： KUNDE JOACHIM DR ,  WILHELM HANS DR ,  DOERFEL HELMUT DR ,  RAUCH KONRAD DR

IPC: C08G20060101

公开(公告)号：AT243243B

公开(公告)日：1965-10-25

申请号：AT701663

申请日：1963-08-30

Applicant: BASF AG

Inventor： DOERFEL HELMUT DR ,  RAFF PAUL DR

Abstract: A process for the production of oximes of cycloaliphatic ketones having at least 12 carbon atoms by action of hydroxylamine on the ketone in an aqueous heterogeneous reaction mixture is effected at an elevated temperature (e.g. 50-150 DEG C.) and at pH 6-14, and is further characterized by the requirement that the aqueous phase contains at least 10% wt. of salt after the reaction is over. A water-immiscible inert solvent b.p. above 10 DEG C. may be present during the reaction or an inert solvent may be added after the reaction to dissolve the oxime formed. U.S.A. Specifications 2,270,204, 2,756,258, 2,820,825, German Specifications 857,375, 888,693, 1,081,884 and 1,042,575 are referred to.

公开(公告)号：CH596250A5

公开(公告)日：1978-03-15

申请号：CH429975

申请日：1975-04-04

Applicant: BASF AG

Inventor： MERTES FRIEDRICH DR ,  DOERFEL HELMUT DR ,  HEIL EDUARD ,  CORDES CLAUS DR

IPC: C08G69/00 ,  C08G69/04 ,  C08G69/28 ,  C08G69/36 ,  G01N30/91

Abstract: An improved process for the continuous manufacture of polyamides by continuously conveying the aqueous solution of a salt of essentially equivalent amounts of a diamine, or of a mixture of several diamines, and of a dicarboxylic acid, or of a mixture of several dicarboxylic acids, or of mixtures of such salts with lactams and/or aminocarboxylic acids, through several reaction zones under polyamide-forming conditions, wherein the mixture of starting materials is heated, in a first reaction zone, to from 200 DEG to 300 DEG C, preferably from 220 DEG to 280 DEG C, at pressures which are above the corresponding saturation vapor pressure of water and prevent the formation of a vapor phase, the pressure action on the polycondensation mixture is released in a second reaction zone and condensation of the mixture, to form high molecular weight polyamides, is then completed in further reaction stages. According to the invention, A. THE MIXTURE OF STARTING MATERIALS IS HEATED, IN THE FIRST REACTION ZONE, UNTIL THE POLYCONDENSATION CONVERSION IS AT LEAST 80% AND PREFERABLY 90%, B. IN THE SECOND ZONE THE PRESSURE ACTING ON THE POLYCONDENSATION MIXTURE IS RELEASED, ADIABATICALLY, TO LEVELS OF NOT LESS THAN 3 ATMOSPHERES, PREFERABLY NOT LESS THAN 5 ATMOSPHERES, AND NOT MORE THAN 20 ATMOSPHERES, PREFERABLY NOT MORE THAN 15 ATMOSPHERES, SO AS TO REACH TEMPERATURES BELOW 215 DEG C, preferably 210 DEG C, c. the polycondensation mixture is then heated in a third reaction zone, comprising a heat exchanger consisting of heat exchange elements connected in parallel, to from 220 DEG to 330 DEG C, preferably from 250 DEG to 300 DEG C, in the course of less than 5 minutes and preferably less than 1 minute, the heating being carried out preferably in the presence of the water vapor formed during the adiabatic release of the pressure (in stage b), with application of heat and evaporation of the bulk of the water, at the pressure level to which the pressure has previously been released or at a lower pressure, and D. IN FURTHER REACTION STAGES, THE CONDENSATION IS COMPLETED, UNDER THE CONDITIONS PREVAILING AT THE END OF THE THIRD REACTION ZONE AND, FINALLY, BY CONVENTIONAL METHODS, TO FORM HIGH MOLECULAR WEIGHT POLYAMIDES.