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公开(公告)号：CA1087619A
公开(公告)日：1980-10-14
申请号：CA251370
申请日：1976-04-28
Inventor： PRESCHER GUENTER , SCHREYER GERD , WEIBERG OTTO , WIRTHWEIN ROLF , WALDMANN HELMUT , SEIFERT HERMANN , SCHWERDTEL WULF , SWODENK WOLFGANG
IPC: C07C409/24 , C07D301/14 , C07D301/12
Abstract: Process for the preparation of propylene oxide 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.
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公开(公告)号：CA1080465A
公开(公告)日：1980-07-01
申请号：CA251373
申请日：1976-04-28
Inventor： PRESCHER GUENTER , SCHREYER GERD , WEIBERG OTTO , WIRTHWEIN ROLF , WALDMANN HELMUT , SEIFERT HERMANN , SCHWERDTEL WULF , SWODENK WOLFGANG
IPC: C07C67/00 , C07C407/00 , C07C409/24 , C09K3/00
Abstract: PROCESS FOR THE PREPARATION OF PERCARBOXYLIC ACID SOLUTIONS Process for continuous production on of substantially anhydrous solutions of perpropionic acid in benzene. Aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid and water (1). The perpropionic acid is extracted with benzene (5), to provide a benzene phase containing the perpropionic acid (11) and an aqueous raffinate (7). The benzene phase is subjected to an extraction with water (12) involving at least 3 stages, to remove hydrogen peroxide, and the resulting benzene extract (15) is subjected to azeotropic distillation (16) to provide the anhydrous solution (17). The aqueous raffinate, which contains hydrogen peroxide, is distilled to remove water (8) and the resulting concentrate is recycled (2) for use in the reaction (1).
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公开(公告)号：NO141988C
公开(公告)日：1980-06-11
申请号：NO126573
申请日：1973-03-27
Applicant: DEGUSSA
Inventor： GEIGER FRIEDHELM , HEIMBERGER WERNER , SCHREYER GERD
Abstract: Side reactions in the use of gaseous chlorine are avoided by leading the chlorine containing at least 0.0001% of non-volatile compounds such as ferric chloride over silica gel, glass wool, pumice or montmorillonite. Preferably the thus treated chlorine is passed through hexachlorobutadiene or perfluorokerosene in a second absorption step. Ferric chloride can also be removed from the chlorine gas by treating with sulfuric acid.
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公开(公告)号：NO141893B
公开(公告)日：1980-02-18
申请号：NO761475
申请日：1976-04-28
Inventor： PRESCHER GUENTER , SCHREYER GERD , WEIBERG OTTO , WIRTHWEIN ROLF , WALDMANN HELMUT , SEIFERT HERMAN , SCHWERDTEL WULF , SWODENK WOLFGANG
IPC: C07C67/00 , C07C407/00 , C07C409/24 , C07C179/10
Abstract: Process for continuous production of substantially anhydrous solutions of perpropionic acid in benzene. Aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid and water (1). The perpropionic acid is extracted with benzene (5), to provide a benzene phase containing the perpropionic acid (11) and an aqueous raffinate (7). The benzene phase is subjected to an extraction with water (12) involving at least 3 stages, to remove hydrogen peroxide, and the resulting benzene extract (15) is subjected to azeotropic distillation (26) to provide the anhydrous solution (17). The aqueous raffinate, which contains hydrogen peroxide, is distilled to remove water (8) and the resulting concentrate is recycled (2) for use in the reaction (1).
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公开(公告)号：CA1041507A
公开(公告)日：1978-10-31
申请号：CA245549
申请日：1976-02-11
Applicant: DEGUSSA
Inventor： HASCHKE HEINZ , SCHREYER GERD , SCHWARZE WERNER , SUCHSLAND HELMUT
IPC: C07D251/42 , C07D251/44 , C07D251/50
Abstract: The present invention provides a process for substituting one chlorine atom by an amino group or for successively substituting two chlorine atoms by identical or different amino groups which comprises reacting at least one amine with a 4 to 60% by weight solution or suspension of the cyanuric chloride in the presence of an acid-binding agent and in an organic solvent which is a mixture ofa) 65 to 85% by weight of at least one member selected from aliphatic hydrocarbons containing 5 to 10 carbon atoms and aromatic hydrocarbons andb) 35 to 15% by weight of at least one ketone containing 3 to 8 carbon atoms.
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Patent Agency Ranking
公开(公告)号：CA1005448A
公开(公告)日：1977-02-15
申请号：CA182070
申请日：1973-09-27
Applicant: DEGUSSA
Inventor： ASINGER FRIEDRICH , PFEIFER WOLF-DIETER , OFFERMANNS HERIBERT , SCHERBERICH PAUL , SCHREYER GERD
IPC: C07D277/10 , C07D277/60
Abstract: 2 AND 5 SUBSTITUTED THIAZOLINE-(3) COMPOUNDS OF THE FORMULA: HC=N R1¦¦R3 ANGLE CC ANGLE (I) ANGLE R2SR4 in which R1, R2, and R3 and R4 are the same or different, R1 and R2 are straight or branched chain lower alkyl, alkenyl or aralkyl groups or together are a straight or branched chain alkylene or ethylenically unsaturated divalent aliphatic hydrocarbon group which joins with the adjacent carbon atom to form a ring and R3 and R4 are similarly defined except R3 can also be hydrogen by reaching a 2,2' dioxodisulfide of the formula OO C ANGLE C ANGLE H R1¦H¦R1 ANGLE C---S-S---C ANGLE (II) R2R2 with an oxo compound of the formula R3 ANGLE C=O R4 and with ammonia and hydrogen sulfide in the presence of an amine and an ammonium salt.
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27.发明专利
公开(公告)号：CA1001166A
公开(公告)日：1976-12-07
申请号：CA188776
申请日：1973-12-21
Applicant: DEGUSSA
Inventor： KRUGER MANFRED , SCHREYER GERD , WEIBERG OTTO
IPC: C07C67/00 , C07C407/00 , C07C409/24
Abstract: There is provided a continuous process for the production of water free or substantially water free peralkanoic acids with 2 to 4 carbon atoms by reaction of aqueous hydrogen peroxide with an alkanoic acid having 2 to 4 carbon atoms in the presence of acidic catalyst at a mole ratio of hydrogen peroxide to alkanoic acid of 0.5 to 30:1, preferably from 0.8 to 20:1, in a reactor by countercurrent extraction of the reaction solution with an organic solvent, recovery of a substantially water free solution of peralkanoic acid as extract and in a given case, eventually after addition of an additional solvent, dehydration of the extract by azeotropic distillation, the entire aqueous raffinate or a portion thereof is led to an evaporator unit, in which the water brought in with the starting materials and formed during the reaction is distilled off under reduced pressure, whereupon the concentrated raffinate as well as in a given case the non-concentrated portion of the raffinate is returned to the reactor and the reactor is replenished with sufficient aqueous hydrogen peroxide and alkanoic acid that the starting conditions are again produced.
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公开(公告)号：FI761186A
公开(公告)日：1976-10-31
申请号：FI761186
申请日：1976-04-28
Inventor： PRESCHER GUENTER , SCHREYER GERD , WALDMANN HELMUT , SCHWERDTEL WULF
IPC: C07C67/00 , C07C407/00 , C07C409/24 , C07C409/26 , C07C
Abstract: Process for the continuous preparation of organic solutions of percarboxylic acids by reaction of aqueous hydrogen peroxide with the corresponding carboxylic acid in the presence of an acid, water-soluble catalyst, extraction of the resulting reaction mixture with an organic solvent and recycle of the raffinate, containing hydrogen peroxide, after reconcentration by the removal of water by distillation into the reaction. The raffinate is fed, together with the whole of that amount of hydrogen peroxide which essentially to the consumption of hydrogen peroxide in the reaction or with a part thereof, into the distillation for the removal of water. The amount of water which essentially corresponds to the sum of the water of reaction formed during the reaction and the water introduced into the process with the feed products is distilled off under reduced pressure. The sump product, thus obtainable, from the distillation is recycled into the reaction.
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公开(公告)号：FI761184A
公开(公告)日：1976-10-31
申请号：FI761184
申请日：1976-04-28
Inventor： PRESCHER GUENTER , SCHREYER GERD , WEIBERG OTTO , WIRTHWEIN ROLF , WALDMANN HELMUT , SEIFERT HERMANN , SCHWERDTEL WULF , SWODENK WOLFGANG
IPC: C07C409/24 , C07D301/14 , C07C
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.
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公开(公告)号：CA995650A
公开(公告)日：1976-08-24
申请号：CA126770
申请日：1971-11-03
Applicant: DEGUSSA
Inventor： SCHREYER GERD , TANNER HERBERT , WEIGERT WOLFGANG , GORA ULLRICH
IPC: B01J27/18
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