公开(公告)号：FR2709490A1

公开(公告)日：1995-03-10

申请号：FR9410366

申请日：1994-08-29

Applicant: BASF AG

Inventor： ERNST HANSGEORG DR ,  PAUST JOACHIM DR ,  DOBLER WALTER DR ,  RHEUDE UDO DR

IPC: C07C403/16 ,  C07C47/21 ,  C07C69/66 ,  C07C403/00 ,  C07C403/24 ,  C07F9/50 ,  C07F9/54 ,  C07C49/325

Abstract: Process for the preparation of astaxanthin by reaction of the tertiary alcohol of formula II or of the diacetate of formula III in an inert solvent with aqueous hydrochloric acid or hydrobromic acid, which gives a halide which is converted, by reaction with triphenylphosphine, to a triphenylphosphonium salt which is reacted, according to a Wittig reaction, with 2,7-dimethyl-2,4,6-octatriene-1,8-dial. By carrying out the reaction of the halide with triphenylphosphine in an acyclic lower dialkyl ether, the triphenylphosphonium salt is obtained in a highly crystalline form which makes isolation easier and which improves the yields.

公开(公告)号：DE59102942D1

公开(公告)日：1994-10-20

申请号：DE59102942

申请日：1991-12-19

Applicant: BASF AG

Inventor： LAEMMERMANN FRITZ ,  RHEUDE UDO DR ,  MAUER GUENTHER

IPC: A23K20/174 ,  A23K40/10 ,  A61K9/18 ,  A23K1/16 ,  A23K1/00

公开(公告)号：DE4100739A1

公开(公告)日：1992-07-16

申请号：DE4100739

申请日：1991-01-12

Applicant: BASF AG

Inventor： PAUST JOACHIM DR ,  HOPPE PETER PAUL DR MED ,  KOHLER WALTER DR ,  LUEDDECKE ERIK DR ,  SCHNEIDER JOACHIM U DR ,  RHEUDE UDO DR

IPC: A23K20/179 ,  A23K50/75 ,  A23K50/80 ,  C07C403/20

Abstract: A feedstuff for laying hens, chickens for eating, fish or crustacea contains small amts. of neurospiraxanthine (I) and/or its esters as dyestuff. The (I)-esters are those from 1-4C alkanols, esp. ethanol. The feedstuff contains 1-150 ppm of (I) or its ester, esp. 1-15 ppm for laying hens and broilers, 10-150 ppm for fish and 20-150 ppm for crustacea. USE/ADVANTAGE - (I) and its esters cause pigmentation of the egg yolks, of the skin, meat and legs of broilers of the flesh of fish and of crustacea and of the shells. (I) and its esters are more effective than the previously used red carotinoids Carthaxanthine, Astaxanthine and citraxanthine and are easier to prepare than the first two as the introduction of the oxygen function(s) in the cyclohexene ring gives increased preparative expenditure.

公开(公告)号：DE19643648A1

公开(公告)日：1998-04-23

申请号：DE19643648

申请日：1996-10-22

Applicant: BASF AG

Inventor： STROEZEL MANFRED ,  RHEUDE UDO DR ,  RAHN RALF-THOMAS DR ,  KAIBEL GERD DR

IPC: C07B49/00 ,  C07C29/124 ,  C07C29/40 ,  C07C31/00 ,  C07C33/02

Abstract: A process for carrying out exothermic reactions comprises (a) addition reaction of an organomagnesium halide of formula RMgX with a carbonyl compound; and (b) hydrolysis of the addition product in a solvent or solvent mixture, in which much of the heat liberated in the reaction is removed by evaporation of the solvent. R = 1-6C alkyl, alkenyl or alkynyl, or aryl; X = Cl, Br or I.

公开(公告)号：DE19617210A1

公开(公告)日：1997-11-06

申请号：DE19617210

申请日：1996-04-30

Applicant: BASF AG

Inventor： KAIBEL GERD DR ,  STROEZEL MANFRED ,  RHEUDE UDO DR

IPC: B01D3/14 ,  B01D3/16 ,  B01D3/32 ,  B01J19/32

Abstract: A partitioned column for separating a multi-component mixture into three or more fractions comprises at least one removable partition wall. Also claimed is a process for separating a multi-component mixture into three or more fractions using the above column.

公开(公告)号：DE4430289A1

公开(公告)日：1995-03-09

申请号：DE4430289

申请日：1994-08-26

Applicant: BASF AG

Inventor： ERNST HANSGEORG DR ,  PAUST JOACHIM DR ,  DOBLER WALTER DR ,  RHEUDE UDO DR

IPC: C07C403/16 ,  C07C47/21 ,  C07C69/66 ,  C07C403/00 ,  C07C403/24 ,  C07F9/50 ,  C07F9/54

Abstract: Process for preparing astaxanthine by reacting A. The tertiary alcohol of the formula II or the diacetate of the formula III with aqueous hydrobromic acid or hydrochloric acid in an inert solvent, B. Reacting the resulting halide of the formula IV with triphenylphosphine in an inert solvent and C. Reacting the resulting triphenylphosphonium salt with 2,7-dimethyl-2,4,6-octatriene-1,8-dial in a Wittig reaction, which is characterised in that, in reaction step B, the halide of the formula IV is reacted with the triphenylphospine in an open-chain lower-dialkyl ether, triphenylphosphonium salt of the formula V being obtained in a form in which it can be readily filtered, and this is reacted in reaction step C in a Wittig reaction with 2,7-dimethyl-2,4,6-octatriene-1,8-dial while simultaneously or subsequently eliminating the acetyl groups, or else in that, in reaction step A, the starting compound of the formula II or III is reacted with aqueous hydrobromic acid or hydrochloric acid in methylene chloride, the resulting solution of the halide of the formula IV is reacted with triphenylphosphine, and the resulting solution of the triphenylphosphonium salt of the formula V is reacted with 2,7-dimethyl-2,4,6-octatriene-1,8-dial in a Wittig reaction in methylene chloride while eliminating the acetyl groups.

公开(公告)号：AT111309T

公开(公告)日：1994-09-15

申请号：AT91121771

申请日：1991-12-19

Applicant: BASF AG

Inventor： LAEMMERMANN FRITZ ,  RHEUDE UDO DR ,  MAUER GUENTHER

IPC: A23K20/174 ,  A23K40/10 ,  A61K9/18 ,  A23K1/16 ,  A23K1/00

公开(公告)号：DE4112272A1

公开(公告)日：1992-10-22

申请号：DE4112272

申请日：1991-04-15

Applicant: BASF AG

Inventor： FRANK JUERGEN DR ,  RHEUDE UDO DR ,  SCHULZ BERNHARD DR ,  PAUST JOACHIM DR ,  HICKMANN ECKHARD DR

IPC: B01J27/128 ,  B01J27/138 ,  C07B61/00 ,  C07C47/21 ,  C07C403/24 ,  C07D307/28

公开(公告)号：AT193462T

公开(公告)日：2000-06-15

申请号：AT97100519

申请日：1997-01-15

Applicant: BASF AG

Inventor： KAIBEL GERD DR ,  RHEUDE UDO DR ,  STROEZEL MANFRED ,  GRAAUW JAN DE PROF DR ,  OLUJIC ZARKO DR ,  FREY GUENTHER ,  JANSEN HELMUT

IPC: B01D3/28 ,  B01J19/32

公开(公告)号：DE19619557C1

公开(公告)日：1997-11-20

申请号：DE19619557

申请日：1996-05-14

Applicant: BASF AG

Inventor： RHEUDE UDO DR ,  HOERCHER ULRICH DR ,  WELLER DIETMAR DR ,  STROEZEL MANFRED

IPC: C07B37/10 ,  C07C20060101 ,  C07C49/21 ,  C07C403/14 ,  C07C403/16

Abstract: A process for the continuous production of alpha and/or beta -ionones or homologous compounds by means of concentrated sulphuric acid at temperatures of 20 to 90 DEG C in the presence of organic solvents or diluents with cooling, and the subsequent halting of the reaction by the hydrolysis of the reaction mixtures with water or dilute sulphuric acid, in which the cyclization of the pseudo-ionones and the subsequent hydrolysis of the reaction mixture is performed in a practically adiabatic reaction in one or more successive reaction mixing pump(s) consisting of a rotational symetrical mixing chamber formed by a peripheral wall and two faces and driven mixing rotor of a material unaffected by sulphuric acid, where the mixing chamber has at least one inlet for each component and an outlet for the reaction mixture and annular chanels in fluid communication with each other in the faces, and the heat of reaction of both reactions is partly or fully evacuated with the aid of a downstream heat exchanger.