-
公开(公告)号：AT269288T
公开(公告)日：2004-07-15
申请号：AT00987467
申请日：2000-12-28
Applicant: BASF AG
Inventor： DERNBACH MATTHIAS , KRATZ DETLEF , STAMMER ACHIM , SCHULZ GERHARD
IPC: C07C29/88 , C07C29/141 , C07C29/80 , C07C31/22
Abstract: A process is provided for increasing the yield in the preparation of polyhydric alcohols obtained from methylolated alkanals by hydrogenation, wherein derivatives of these alcohols are decomposed by adding 5 ppm to 1% by weight, preferably 100 to 1000 ppm, of a suitable acid to an anhydrous mixture containing these derivatives, heating the mixture to temperatures of 100 to 300° C. and then separating off the polyhydric alcohol by distillation. This process makes it possible simply and efficiently to decompose compounds which boil above the polyhydric alcohol and are unwanted by-products of its synthesis.
-
公开(公告)号：AU2003258544A1
公开(公告)日：2004-03-29
申请号：AU2003258544
申请日：2003-07-30
Applicant: BASF AG
Inventor： SIRCH TILMAN , WARTINI ALEXANDER , DERNBACH MATTHIAS , MELDER JOHANN-PETER
-
公开(公告)号：AU2003250113A1
公开(公告)日：2004-02-23
申请号：AU2003250113
申请日：2003-07-18
Applicant: BASF AG
Inventor： DERNBACH MATTHIAS , WARTINI ALEXANDER , SIRCH TILMAN , MELDER JOHANN-PETER
IPC: C07C29/10 , C07C29/141 , C07C29/88 , C07C45/75
Abstract: The invention relates to a method for increasing yield in the production of polyvalent alcohols, especially trimethylolpropane, obtained by condensing formaldehyde with a higher aldehyde. According to the inventive method, acid treatment is carried out on a mixture (high-boiling fraction) that is obtained by reprocessing, contains derivatives of said alcohols and has a higher boiling point than the respective alcohol, and the polyvalent alcohol is recovered from the acid-treated high-boiling fraction. The inventive method is characterised in that the water content of the high-boiling fraction amounts to between 20 and 90 wt. % in relation to the entire mixture of the high-boiling fraction and water.
-
公开(公告)号：MXPA03003325A
公开(公告)日：2003-06-19
申请号：MXPA03003325
申请日：2001-11-02
Applicant: BASF AG
Inventor： DERNBACH MATTHIAS
-
75.发明专利
公开(公告)号：AU2002217031A1
公开(公告)日：2003-06-10
申请号：AU2002217031
申请日：2001-11-15
Applicant: BASF AG
Inventor： WARTINI ALEXANDER , SIRCH TILMAN , DERNBACH MATTHIAS , MELDER JOHANN-PETER
Abstract: The invention relates to a method for removing acetals containing formaldehyde from polyvalent alcohols, especially trimethylolpropane. The inventive method is characterised in that the polyvalent alcohol is liberated of low-boiling constituents after it has been produced by distillation, is then subjected to tempering and is repurified, preferably by means of distillation.
-
Patent Agency Ranking
公开(公告)号：BR0016758A
公开(公告)日：2002-09-24
申请号：BR0016758
申请日：2000-12-28
Applicant: BASF AG
Inventor： DERNBACH MATTHIAS , KRATZ DETLEF , STAMMER ACHIM , HAAKE MATHIAS , KOCH MICHAEL , SCHULZ GERHARD
IPC: C07B61/00 , C07C29/141 , C07C29/80 , C07C29/90 , C07C31/22
Abstract: A process for greatly improving the color index of polyhydric alcohols, especially trimethylolpropane, by hydrogenation comprises using, in the hydrogenation, an alcohol which has already been purified by distillation. The catalysts used are those conventionally employed in hydrogenations, preferably copper, nickel, palladium or ruthenium catalysts.
-
公开(公告)号：BR0016807A
公开(公告)日：2002-09-10
申请号：BR0016807
申请日：2000-12-27
Applicant: BASF AG
Inventor： DERNBACH MATTHIAS , KRATZ DETLEF , STAMMER ACHIM , SCHULZ GERHARD
IPC: C07B61/00 , C07C29/14 , C07C31/22 , C07C45/75 , C07C45/82 , C07C45/83 , C07C45/86 , C07C47/058 , C07C47/19 , C07C45/80
Abstract: Formaldehyde is removed by distillation from reaction solutions containing a methlolated alkanal which was obtained from the reaction of formaldehyde with an alkanal which has at least one acidic hydrogen atom alpha to the carbonyl function or from the reaction of a 2-alkylacrolein or acrolein with water and formaldehyde, by a process in which this reaction was carried out in the presence of catalytic amounts of organic amine. The process permits the improved removal of formaldehyde from the reaction mixture and furthermore facilitates the hydrogenation of the alkanals thus obtained to give polyols.
-
公开(公告)号：DE10055180A1
公开(公告)日：2002-05-29
申请号：DE10055180
申请日：2000-11-08
Applicant: BASF AG
Inventor： DERNBACH MATTHIAS , KOCH MICHAEL , SCHULZ GERHARD , WEIGL HAGEN , MAAS STEFFEN
Abstract: The invention relates to a method for catalytically hydrating a poly- or monomethylol alkanal of the general formula (I), wherein R is the same or different and may represent a substituted or unsubstituted aliphatic hydrocarbon with 6 to 22 carbon atoms, an aryl or arylalkyl group with 6 to 22 carbon atoms or a methylol group, in the presence of a copper-containing catalyst. The inventive method is characterized in that the poly- or monomethylol alkanal containing batch to be hydrated has a total content of up to 5 ppm of metal ions of the groups 3 to 14 of the periodic system.
-
公开(公告)号：AU745558B2
公开(公告)日：2002-03-21
申请号：AU3419299
申请日：1999-03-30
Inventor： KOBER REINER , HOBBS DAVID , GIBSON SCOTT W , FERSCH KENNETH , RADEMACHER WILHELM , BOTZEM JORG , FREDE MARKUS , DERNBACH MATTHIAS , GOTTSCHE REIMER , DOTZER REINHARD
IPC: C07D295/02 , A01N33/12 , A01N43/40 , A01N59/14 , C01B35/12 , C07D295/037
Abstract: The invention provides novel mepiquat plant growth regulator compositions which have improved hygroscopicity and corrosion characteristics. The novel mepiquat plant growth regulator compositions of the invention can be readily prepared from technical mepiquat chlorid inter alia by electrochemical ion exchange processes or by quaternization of N-methylpiperidine with dimethylcarbonate as starting material.
-
公开(公告)号：DE19963438A1
公开(公告)日：2001-10-31
申请号：DE19963438
申请日：1999-12-28
Applicant: BASF AG
Inventor： DERNBACH MATTHIAS , KRATZ DETLEF , STAMMER ACHIM , SCHULZ GERHARD
-
-
-
-
-
-
-
-
-
Search Results
114
records
(took 0.022 seconds)
