公开(公告)号：CS203917B2

公开(公告)日：1981-03-31

申请号：CS278776

申请日：1976-04-28

Applicant: BAYER AG ,  DEGUSSA

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

IPC: C07C409/24 ,  C07D301/14 ,  C07D305/10

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：NO142076C

公开(公告)日：1980-06-25

申请号：NO761473

申请日：1976-04-28

Applicant: DEGUSSA ,  BAYER AG

Inventor： PRESCHER GUENTER ,  WEIBERG OTTO ,  WALDMANN HELMUT ,  SEIFERT HERMANN

IPC: C07C67/00 ,  C07C407/00 ,  C07C409/24 ,  C07D301/14 ,  C07C179/10

Abstract: In the production of perpropionic acid by reaction of hydrogen peroxide and propionic acid in an aqueous medium and in the presence of an acid catalyst, e.g. sulfuric acid, to produce the peracid and water, the danger of explosion is reduced by employing a molar ratio of hydrogen peroxide to propionic acid of less than 1.4:1, a temperature of up to 60 DEG C, and an initial hydrogen peroxide:water ratio of up to 1.2, and a catalyst concentration of 10-40% of weight.

公开(公告)号：NO141893C

公开(公告)日：1980-06-04

申请号：NO761475

申请日：1976-04-28

Applicant: DEGUSSA ,  BAYER AG

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).

公开(公告)号：DD127889A5

公开(公告)日：1977-10-19

申请号：DD19550176

申请日：1976-10-28

Applicant: BAYER AG ,  DEGUSSA

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

IPC: C07C409/24 ,  C07D301/14 ,  C07D301/16

公开(公告)号：CA1153005A

公开(公告)日：1983-08-30

申请号：CA352396

申请日：1980-05-21

Applicant: DEGUSSA

Inventor： KLENK HERBERT ,  WIRTHWEIN ROLF ,  WALDMANN HELMUT ,  SEIFERT HERMANN

IPC: C07D313/04 ,  C07D315/00 ,  C09K15/06

Abstract: Caprolactones such as .epsilon.-caprolactone are stabilized against discoloration with dihydroxybenzenes such as hydroquinone or compounds of the formula or in which R1 is alkyl of 1 to 8 carbon atoms, and R2 is hydrogen or alkyl of 1 to 8 carbon atoms. Even the presence of air is not detrimental. Le A 19 371

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：CA1097367A

公开(公告)日：1981-03-10

申请号：CA264296

申请日：1976-10-27

Applicant: BAYER AG ,  DEGUSSA

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

IPC: C07C409/24 ,  C07D301/14 ,  C07D303/04

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); the perpropionic acid in the benzene solution is reacted with propylene (21) 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 (27, 29, 34, 37), and the latter two are recyled. In the benzene extraction (5), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. The aqueous raffinate can be divided into a stream which is recycled to the propionic acid reactor (1), and a second stream which can be distilled to remove water with the concentrate being recycled to the propionic acid reactor. (1) Le A 17,343/6142 PV -1-

公开(公告)号：CS189766B2

公开(公告)日：1979-04-30

申请号：CS278976

申请日：1976-04-28

Applicant: DEGUSSA ,  BAYER AG

Inventor： PRESCHER GUENTER ,  WEIBERG OTTO ,  WALDMANN HELMUT ,  SEIFERT HERMANN

IPC: C07C67/00 ,  C07C407/00 ,  C07C409/24 ,  C07C179/10

Abstract: Process for preparing perpropionic acid, by reaction of hydrogen peroxide with propionic acid, in the presence of sulfuric acid, under explosion-proof conditions, characterized in that the reaction of hydrogen peroxide with propionic acid in the presence of sulfuric acid is carried out, in a molar proportion of application of hydrogen peroxide; propionic acid of more than 3.5: 1, the reaction temperature is limited to a maximum temperature of 60º c. And the weight ratio of hydrogen peroxide (100% by weight): water is limited, before the start of the reaction with propionic acid, at most 0.8, the concentration of the sulfuric acid in the reaction mixture increasing to 10 to 40% by weight. (Machine-translation by Google Translate, not legally binding)

公开(公告)号：AU1341976A

公开(公告)日：1977-11-03

申请号：AU1341976

申请日：1976-04-28

Applicant: DEGUSSA

Inventor： PRESCHER GUNTER ,  WALDMANN HELMUT ,  SCHREYER GERD ,  SEIFERT HERMANN ,  WIEBERG OTTO ,  SCHWERDTEL WULF ,  WIRTHWEIN ROLF ,  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).

公开(公告)号：AU1341676A

公开(公告)日：1977-11-03

申请号：AU1341676

申请日：1976-04-28

Applicant: BAYER AG ,  DEGUSSA

Inventor： PRESCHER GUNTER ,  SCHREYER GERD ,  WALDMANN HELMUT ,  SCHWERDTEL WULF

IPC: C07C67/00 ,  C07C407/00 ,  C07C409/24 ,  C07C409/26 ,  C07C179/10

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.