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公开(公告)号：DE3862665D1
公开(公告)日：1991-06-13
申请号：DE3862665
申请日：1988-03-04
Applicant: DEGUSSA
Inventor： DANKOWSKI MANFRED DR , LEONHARDT WOLFGANG DR , LIESER THOMAS DR , DIEHL MANFRED DR , PRESCHER GUENTER DR
Abstract: Aqueous bleaching agent suspensions based on a water-soluble peroxycarboxylic acid suspended in a carrier liquid in the presence of an organic thickening agent and of an acidifying agent exhibit an improved storage resistance over known suspensions with this base. This is achieved by means of pourable to pasty bleaching agent suspensions which contain a xanthan polysaccharide or agar polysaccharide as thickening agent and, in addition, a hydrate-forming neutral salt which desensitizes peroxycarboxylic acids. Preferred suspensions exhibit a pH of 2-5 and contain 10-30% by wt. diperoxydodecanedioic acid, 5-20% by wt. sodium sulfate and 0.1-1.0% by wt. xanthan. The use of non-dried, hydrophilized and optionally in situ desensitized peroxycarboxylic acids is especially preferred. The bleaching agent suspensions are prepared by homogeneously suspending the peroxycarboxylic acid in the thickened carrier liquid. The storage-resistant bleaching agent suspensions are used as laundry bleaching agents and for preparing cleaning agents and disinfection agents.
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公开(公告)号：AT63333T
公开(公告)日：1991-05-15
申请号：AT88103337
申请日：1988-03-04
Applicant: DEGUSSA
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公开(公告)号：DE3765883D1
公开(公告)日：1990-12-06
申请号：DE3765883
申请日：1987-07-29
Applicant: DEGUSSA
Inventor： SIEGMEIER RAINER DR , PRESCHER GUENTER DR , MAURER HELMUT
Abstract: The continuous production of 1,2-diols by means of saponification of aliphatic, linear or branched epoxides with 8-30 carbon atoms or high molecular weight cycloaliphatic epoxides with water and acidic catalyst at pressures of 1-5 bar using a vapor-liquid mixture of a solubilizing agent which is stationary in a column. The yields obtained are high and exhibit a high degree of purity. The water added can be recycled as such.
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公开(公告)号：DE3673316D1
公开(公告)日：1990-09-13
申请号：DE3673316
申请日：1986-08-26
Applicant: DEGUSSA
Inventor： ANDRADE JUAN DR , PRESCHER GUENTER DR , KOEHLER KLAUS
Abstract: 4-chloro-butanals of the formula where R is hydrogen or a straight or branched chain alkyl group of 1 to 4 carbon atoms are produced by reacting the corresponding 1,1-dimethoxy-4-hydroxybutane at a temperature between -20 DEG and +80 DEG C. in the presence of triphenylphosphine with carbon tetrachloride and hydrolyzing the 1,1-dimethoxy-4-chloro-butane obtained in acid medium.
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公开(公告)号：DE3731690C1
公开(公告)日：1989-01-19
申请号：DE3731690
申请日：1987-09-21
Applicant: DEGUSSA
Inventor： SCHMIDT MANFRED DR , PRESCHER GUENTER DR , BUCHLER JOHANN PROF DR
IPC: C07B61/00 , B01J31/22 , C07D301/12 , C07D303/02 , C07D303/04
Abstract: A process for the catalytic epoxidation of olefins using hydrogen peroxide in the presence of rhenium oxo complexes or a binuclear compound of the type mu -oxobis[porphyrinato-oxo-rhenium(V)] containing either octaethylporphyrin or 5,10,15,20-tetraphenylporphyrin or 5,10,15,20-tetra(4-pyridyl)porphyrin as ligands.
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Patent Agency Ranking
公开(公告)号：DE3642475A1
公开(公告)日：1988-06-23
申请号：DE3642475
申请日：1986-12-12
Applicant: DEGUSSA
Inventor： BAEUML MANFRED DR , HAUBRICH GERHARD DR , PALMANS JEAN-PAUL DR , PRESCHER GUENTER DR
IPC: C07C227/16 , C07C101/32 , C07C99/00
Abstract: ss-Phenylserine is prepared by condensation of glycine with benzaldehyde in the presence of an alkali metal hydroxide in a medium consisting of water and a benzaldehyde-immiscible silicone oil and subsequent treatment of the alkali metal salt of N-benzylidene-ss-phenylserine formed in this way with an acid. As a result of the additional use of silicone oil, the reaction mixture remains stirrable during the condensation reaction and the work-up is facilitated by the acid treatment.
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公开(公告)号：DE3628664A1
公开(公告)日：1988-03-03
申请号：DE3628664
申请日：1986-08-23
Applicant: DEGUSSA
Inventor： ANDRADE JUAN DR , KOEHLER KLAUS , PRESCHER GUENTER DR
IPC: C07B61/00 , B01J31/00 , C07C51/00 , C07C51/235 , C07C51/373 , C07C55/21 , C07C59/147 , C07C67/00 , B01J31/28 , C07C51/14
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公开(公告)号：DE3539872A1
公开(公告)日：1987-05-14
申请号：DE3539872
申请日：1985-11-11
Applicant: DEGUSSA
Inventor： GRUND ANDREAS DR , PRESCHER GUENTER DR , ECKER ARMIN
IPC: B01J31/14 , C07C29/14 , C07C33/14 , C07D309/24 , C07C33/12
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公开(公告)号：DE3535128A1
公开(公告)日：1987-04-02
申请号：DE3535128
申请日：1985-10-02
Applicant: DEGUSSA
Inventor： ARNTZ DIETRICH DR , BAACKE MICHAEL DR , KLEINSCHMIT PETER DR , PRESCHER GUENTER DR
IPC: B01J29/00 , B01J29/06 , B01J29/18 , B01J29/40 , C07B61/00 , C07C41/00 , C07C41/28 , C07C43/04 , C07C43/14 , C07C43/164 , C07C67/00 , B01J29/08 , C01B33/26 , C07C43/16 , C07C43/15 , C07C43/166
Abstract: 1. A process for the production of unsaturated ethers corresponding to the following general formula see diagramm : EP0217089,P8,F2 by catalytic dealkoxylation of geminal dialkoxy compounds corresponding to formula (II) see diagramm : EP0217089,P8,F3 R**1 and R**2 representing C1 -C3 alkyl, aryl, H, R**3 representing methyl, ethyl, Y representing H, methyl, at elevated temperature in the gas phase on an Na-exchanged zeolite as catalyst, characterized in that zeolites of the modernite or ZSM5 type with an Na2 O:Al2 O3 molar ratio of 1:1.05 (+-0.25) are used.
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公开(公告)号：DE2633395A1
公开(公告)日：1978-02-02
申请号：DE2633395
申请日：1976-07-24
Inventor： PRESCHER GUENTER DR , SCHREYER GERD DR , WEIBERG OTTO DR , WIRTHWEIN ROLF DR , WALDMANN HELMUT DR , SEIFERT HERMANN DR , SCHWERDTEL WULF , SWODENK WOLFGANG DR
IPC: C07C409/24 , C07D301/14 , C07D303/04 , C07D301/12
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