公开(公告)号：CA966857A

公开(公告)日：1975-04-29

申请号：CA151625

申请日：1972-09-13

Applicant: DEGUSSA

Inventor： SCHREYER GERD ,  WEIBERG OTTO

IPC: C07C409/24 ,  C07C67/00 ,  C07C407/00 ,  C07C409/26

Abstract: Water free solutions of percarboxylic acids having two to four carbon atoms are prepared by extracting aqueous solutions of the percarboxylic acids with phosphate esters having three to 30 carbon atoms, desorbing the extract with a solvent and dehydrating the solvent, in a given case by azeotropic distillation, if necessary after addition of a carboxylic acid ester boiling below the percarboxylic acid.

公开(公告)号：CA954671A

公开(公告)日：1974-09-17

申请号：CA110561

申请日：1971-04-16

Applicant: DEGUSSA

Inventor： GIESSELMANN GUNTER ,  SCHREYER GERD ,  WEIGERT WOLFGANG

IPC: C01B15/023

Abstract: 1354032 N,N-Diethyl-N,N 1 -di-n-butyl urea DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT 19 April 1971 [18 April 1970] 40785/73 Divided out of 1354031 Heading C2C N,N-Diethyl-N,N 1 -di-n-butyl urea, which is a novel compound, is obtained by reacting phosgene with di-n-butylamine and then with diethylamine or vice versa.

公开(公告)号：CA875601A

公开(公告)日：1971-07-13

申请号：CA875601D

Applicant: DEGUSSA

Inventor： KLEEMANN AXEL ,  SCHREYER GERD ,  WEIGERT WOLFGANG ,  WEIBERG OTTO

公开(公告)号：DK150983B

公开(公告)日：1987-10-05

申请号：DK344374

申请日：1974-06-26

Applicant: DEGUSSA

Inventor： GEIGER FRIEDHELM ,  HEIMBERGER WERNER ,  WEIGERT WOLFGANG ,  SCHREYER GERD

IPC: C07D251/28

公开(公告)号：CS233711B2

公开(公告)日：1985-03-14

申请号：CS755979

申请日：1979-11-06

Applicant: DEGUSSA

Inventor： HENTSCHEL KLAUS ,  BITTNER FRIEDRICH ,  SCHREYER GERD ,  FRANZ GEORG

IPC: B01F23/47 ,  B01J19/26 ,  C07D251/28 ,  C07D251/44 ,  B01F3/08

Abstract: There is provided an apparatus for bringing into contact liquids at least one of which is viscous, the apparatus consisting essentially of a tubular container, a first nozzle from introducing a liquid in the upper portion of the container, at least one other nozzle lower than the first nozzle for introducing a different liquid, the tubular container being closeable at the tap thereof and downward from said other nozzle being constricted breast shaped to form a discharge opening, said other nozzles are preferably of polished steel, said other nozzles consist essentially of at least one tangential spray means arranged in at least one row, said other nozzles being slightly above said constriction and being directed in the direction of the upper closeable device or said first nozzle and wherein the discharge opening can discharge into another container which is permanently or detachably connected to the tubular container, said further container can be provided with means for establishing reduced pressure or superatmospheric pressure.

公开(公告)号：ZA826438B

公开(公告)日：1983-07-27

申请号：ZA826438

申请日：1982-09-02

Applicant: DEGUSSA

Inventor： SCHREYER GERD ,  LOEWE FRITZ

IPC: B01J8/10 ,  C01B31/08 ,  C01B32/336 ,  C01B

公开(公告)号：RO79091A

公开(公告)日：1983-02-01

申请号：RO9929479

申请日：1979-11-20

Applicant: DEGUSSA

Inventor： HENTSCHEL KLAUS ,  BITTNER FRIEDRICH ,  SCHREYER GERD ,  FRANZ GEORG

IPC: B01F23/47 ,  B01J19/26 ,  C07D251/28 ,  C07D251/44 ,  B01F5/20

Abstract: There is provided an apparatus for bringing into contact liquids at least one of which is viscous, the apparatus consisting essentially of a tubular container, a first nozzle from introducing a liquid in the upper portion of the container, at least one other nozzle lower than the first nozzle for introducing a different liquid, the tubular container being closeable at the tap thereof and downward from said other nozzle being constricted breast shaped to form a discharge opening, said other nozzles are preferably of polished steel, said other nozzles consist essentially of at least one tangential spray means arranged in at least one row, said other nozzles being slightly above said constriction and being directed in the direction of the upper closeable device or said first nozzle and wherein the discharge opening can discharge into another container which is permanently or detachably connected to the tubular container, said further container can be provided with means for establishing reduced pressure or superatmospheric pressure.

公开(公告)号：FI62076C

公开(公告)日：1982-11-10

申请号：FI761184

申请日：1976-04-28

Applicant: BAYER AG ,  DEGUSSA

Inventor： WALDMANN HELMUT ,  SEIFERT HERMANN ,  SCHWERDTEL WULF ,  SWODENK WOLFGANG ,  PRESCHER GUENTER ,  SCHREYER GERD ,  WEIBERG OTTO ,  WIRTHWEIN ROLF

IPC: C07C409/24 ,  C07D301/14 ,  C07C178/00

Abstract: Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5 , 12), and following drying of the benzene solution (16), the perpropionic acid in the solution is reacted with propylene (18) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (25, 27, 31, 33), and the latter two are recycled. In the benzene extraction (5, 12), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. Water is removed from the aqueous raffinate (8) and the concentrate is recycled to the propionic acid reactor. Make-up hydrogen peroxide can be added to the aqueous raffinate before the removal of water.

公开(公告)号：CH626355A5

公开(公告)日：1981-11-13

申请号：CH167076

申请日：1976-02-11

Applicant: DEGUSSA

Inventor： HASCHKE HEINZ ,  SCHREYER GERD ,  SCHWARZE WERNER ,  SUCHSLAND HELMUT

IPC: C07D251/50 ,  C07D251/44 ,  C07D251/40

Abstract: There is provided a process, preferably continuous and in a given case successive, substitution of one or two chlorine atoms of cyanuric chloride by one or two amines, which may be the same or different, in the presence of an acid acceptor and in the presence of an organic solvent, particularly for the production of 2-alkylamino-4,6-dichloro and preferably for the production of 2,4-di(alkylamino)-6-chloro-s-triazines wherein there is added 1.00 to 1.05 mole, preferably 1.00 to 1.03 mole of a first amine to a 4.5 to 50 weight % suspension or solution of cyanuric chloride in a mixture of 65 to 85 weight % of xylene, toluene, ethylbenzene, benzene and/or an aliphatic or cycloaliphatic hydrocarbon with 5 to 10 carbon atoms (toluene being preferred) and 35 to 15 weight % of a ketone with 3 to 8 carbon atoms, preferably acetone, while maintaining the temperature between about 0 and about 20 DEG C, preferably about 10 to 18 DEG C., continuously so regulating the pH value of the reaction mixture obtained in accordance with the reaction time by addition of alkali and in a given case, water so that this corresponds to a point within the area bounded by lines ABCD of FIG. 1, which runs through the area beginning with the reaction time t,(step 1)= 0 until reaching a position in the area bounded by the lines BCEF and after reaching a pH of 7.0, preferably 7.2 maintains a temperature of about 10 DEG to about 60 DEG C., preferably about 25 DEG to 40 DEG C., after addition of 0.96 to 1.05, preferably 0.98 to 1.02 equivalents of alkali per mole of cyanuric chloride, adding at least an equimolar amount, preferably 1.00 to 1.02 mole of the second amine per mole of cyanuric chloride and continuously so adjusting the pH value of the reaction mixture obtained depending on the reaction time by addition of alkali that this corresponds to a point within the area which is defined by lines GHIJ in FIG. 3 which passes through the band beginning with the reaction time t(step 2)= 0 of the second reaction step until reaching a position in the area bounded by the lines HIKL and thereby maintaining a temperature of 40 to 70 DEG C., preferably 45 DEG to 55 DEG C. and thereafter working up the product in known manner wherein t1 is a time of 4 to 10 hours, preferably about 7 hours and t2 is a time of 2 to 8 hours, preferably about 6 hours and wherein the B C corresponds to the equation, pH = -(12.6/t1)+ 14.35 and the line H I corresponds to the equation pH = -(24,857/t2)+ 23.9285. There are also disclosed novel, purified mono and bis alkylamino-cyanoalkylalkylamino - s - triazines.

公开(公告)号：CA1103248A

公开(公告)日：1981-06-16

申请号：CA340151

申请日：1979-11-19

Applicant: DEGUSSA

Inventor： HENTSCHEL KLAUS ,  BITTNER FRIEDRICH ,  SCHREYER GERD

IPC: B01D1/18 ,  B01F3/08 ,  B01F3/12 ,  B01F5/20 ,  C07D251/28

Abstract: Production of suspensions or solutions of cyanuric chloride in water at high mixing rates and low reaction temperatures and resulting low degree of hydrolysis by injecting liquid cyanuric chloride through a nozzle, disposed in the upper end of a mixing device, in a countercurrent to the water rising from below through a nozzle or nozzles, the water being fed in above a breast-like taper in the lower open end of the device. The chamber walls are always covered with an uninterrupted liquid layer. The process can be carried out at standard pressure and at excess or negative gauge pressure. The system is simultaneously cooled at negative gauge pressure by evaporation of the water.