公开(公告)号：DE3061060D1

公开(公告)日：1982-12-16

申请号：DE3061060

申请日：1980-05-05

Applicant: BAYER AG ,  DEGUSSA

Inventor： HOFEN WILLI ,  KLENK HERBERT DR ,  SCHREYER GERD DR ,  WEIBERG OTTO DR ,  WALDMANN HELMUT DR ,  SEIFERT HERMANN DR ,  REISSINGER KARL-HERMANN ,  SWODENK WOLFGANG DR

IPC: C07D313/04 ,  C07D315/00

公开(公告)号：CH601223A5

公开(公告)日：1978-06-30

申请号：CH536176

申请日：1976-04-28

Applicant: DEGUSSA

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

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：DE2519299A1

公开(公告)日：1976-11-11

申请号：DE2519299

申请日：1975-04-30

Applicant: BAYER AG ,  DEGUSSA

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

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：DE2203806A1

公开(公告)日：1973-08-02

申请号：DE2203806

申请日：1972-01-27

Applicant: DEGUSSA

Inventor： MERK WOLFGANG DR ,  SCHREYER GERD DR ,  WEIBERG OTTO DR

IPC: B01J23/00 ,  C07B61/00 ,  C07C27/00 ,  C07C29/10 ,  C07C31/20 ,  C07C67/00 ,  C07C31/18

公开(公告)号：DE2145604A1

公开(公告)日：1973-03-29

申请号：DE2145604

申请日：1971-09-13

Applicant: DEGUSSA

Inventor： SCHREYER GERD DR ,  WEIBERG OTTO DR

IPC: C07C409/24 ,  C07C67/00 ,  C07C407/00 ,  C07C409/26 ,  C07C73/10

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：DE2145602A1

公开(公告)日：1973-03-29

申请号：DE2145602

申请日：1971-09-13

Applicant: DEGUSSA

Inventor： KLEINSCHMIT PETER DR ,  SCHREYER GERD DR ,  WEIBERG OTTO DR ,  WEIGERT WOLFGANG DR

IPC: C07C407/00 ,  C07C409/24 ,  C07C409/26 ,  C07C73/10

Abstract: Percarboxylic acids are extracted with a 4-20C carboxylic acid ester. The extract may opt. be dried by azeotropic distillation under vacuum opt. after addition of a carboxylic acid ester of b.pt. lower than that of the per-acid. Anhydrous solns. of per-acids may be obtained simply from media from the reaction of acids with H2O2 and acid catalyst with less danger of degradation of the solvent. Method is economic and controllable.

公开(公告)号：DE2141157A1

公开(公告)日：1973-02-22

申请号：DE2141157

申请日：1971-08-17

Applicant: DEGUSSA

Inventor： SCHREYER GERD DR ,  WEIBERG OTTO DR

IPC: C07C407/00 ,  C07C73/10

Abstract: Anhydrous solns of 2-4C percarboxylic acids are prepd by extraction of aq. solns of the acid with 3-30C phosphates pref. trimethyl-, tributyl- or trioctyl-phosphate followed by desorption of the extract, pref with 4-10C carboxylate and azeotropic distillation of the desorbate, esp in the presence of an ester of boiling pt below that of the percarboxylic acid, to remove the water. There is a reduced risk of explosion and less dissociation of the org. solvent.

公开(公告)号：DE3125057A1

公开(公告)日：1983-01-05

申请号：DE3125057

申请日：1981-06-26

Applicant: BAYER AG ,  DEGUSSA

Inventor： WEIBERG OTTO DR ,  SEIFERT HERMANN DR ,  WALDMANN HELMUT DR

IPC: C07C15/30 ,  C07D307/36 ,  C07D307/56 ,  C07D307/77 ,  C07D307/91 ,  C07D307/89 ,  C07D493/12

Abstract: Furans are prepared by reacting a beta , gamma -olefinically unsaturated carbonyl compound, at temperatures of from -20 to +150 DEG C, with an oxidising agent which is suitable for epoxidising or hydroxylating olefinic double bonds. Phenanthrenes are prepared by converting a beta , gamma -olefinically unsaturated carbonyl compound from the group comprising the 2-(cyclohexen-1-yl)cyclohexanones, at temperatures of from -20 to +150 DEG C and using an oxidising agent which is suitable for epoxidising or hydroxylating olefinic double bonds, into the corresponding, partially hydrogenated, dibenzofuran, subsequently reacting the latter with a dienophile, and subjecting the resulting adduct first to a dehydrating treatment and then to a dehydrogenating treatment.

公开(公告)号：DE2519297A1

公开(公告)日：1976-11-11

申请号：DE2519297

申请日：1975-04-30

Applicant: BAYER AG ,  DEGUSSA

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

IPC: C07C409/24 ,  C07D301/14 ,  C07D301/32 ,  C07D303/04 ,  C07D301/12

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, 18) and following drying of the benzene solution (21), the perpropionic acid in the solution is reacted with propylene (24) 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 (30, 32, 37, 39), and the latter two are recycled. In the benzene extraction (5, 18), 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.

公开(公告)号：DE2262970A1

公开(公告)日：1974-07-11

申请号：DE2262970

申请日：1972-12-22

Applicant: DEGUSSA

Inventor： KRUEGER MANFRED DR ,  SCHREYER GERD DR ,  WEIBERG OTTO DR

IPC: C07C67/00 ,  C07C407/00 ,  C07C409/24 ,  C07C73/10

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.