公开(公告)号：NO20080315A

公开(公告)日：2008-02-27

申请号：NO20080315

申请日：2008-01-18

Applicant: BASF AG

Inventor： STROFER ECKHARD ,  STAMMER ACHIM ,  HASSE HANS ,  LANG NEVEN ,  SIEGERT MARKUS ,  FRIESE THORSTEN ,  BLAGOV SERGEJ ,  GRUETZNER THOMAS

IPC: C07D323/06

CPC classification number: C07D323/06 ,  Y02P20/125

公开(公告)号：DE50014147D1

公开(公告)日：2007-04-19

申请号：DE50014147

申请日：2000-12-27

Applicant: BASF AG

Inventor： DERNBACH MATTHIAS ,  KRATZ DETLEF ,  STAMMER ACHIM ,  SCHULZ GERHARD

IPC: C07C45/80 ,  C07B61/00 ,  C07C29/14 ,  C07C31/22 ,  C07C45/75 ,  C07C45/82 ,  C07C45/83 ,  C07C45/86 ,  C07C47/058 ,  C07C47/19

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：BRPI0418083A

公开(公告)日：2007-04-17

申请号：BRPI0418083

申请日：2004-12-21

Applicant: BASF AG

Inventor： SIEGERT MARKUS ,  LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  HASSE HANS

IPC: C07D323/06

Abstract: A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I of formaldehyde as the main component and trioxane and water as the secondary components, b) mixing the use stream I with a recycle stream VII to obtain a feed stream Ia, c) distilling the use stream Ia in a first distillation stage to obtain a stream II of formaldehyde as the main component and water as the secondary component, and a stream III of trioxane as the main component and water and formaldehyde as the secondary components, d) distilling the stream III in a second distillation stage having a pressure higher than in the first distillation stage, to obtain a stream IV of trioxane and a stream V of trioxane as the main component and water and formaldehyde as the secondary components, e) distilling the stream V in a third distillation stage to obtain a stream VI of water and the recycle stream VII of trioxane as the main component and water and formaldehyde as the secondary components.

公开(公告)号：DE102005042505A1

公开(公告)日：2007-03-08

申请号：DE102005042505

申请日：2005-09-07

Applicant: BASF AG

Inventor： SIEGERT MARKUS ,  LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM

IPC: C07D317/08

Abstract: Processes comprising: providing a reactive distillation column having an upper region, a middle region and a lower region; feeding ethylene glycol and an aqueous formaldehyde solution into the reactive distillation column in the middle region of the reactive distillation column; reacting the ethylene glycol and the aqueous formaldehyde solution in the reactive distillation column in the presence of a catalyst to form dioxolane; removing a product stream comprising dioxolane in an amount of at least 75% by weight from the upper region of the reactive distillation column; and removing a bottom stream comprising one or more components having boiling points higher than dioxolane from the lower region of the reactive distillation column.

公开(公告)号：CA2620161A1

公开(公告)日：2007-03-01

申请号：CA2620161

申请日：2006-08-25

Applicant: BASF AG

Inventor： STAMMER ACHIM ,  STOECKELMANN ELMAR ,  LANG NEVEN ,  ZOELLNER KNUT

IPC: C08G2/10 ,  C07D323/06 ,  C08G2/28

Abstract: A method for production of polyoxymethylene homo- or co-polymers by homo- or co-polymerisation of trioxan or additional suitable co-monomers is disclosed , wherein trioxan is firstly produced in a monomer plant, which contains residual monomer and which is degassed in one or more stages to give one or more vapour streams (13, 14), optionally fed to a condenser (K) wherein the condensable components are condensed out to give a condensate (15), recycled into the polymerisation reactor (P) and a gaseous stream (16) containing formaldehyde and a partly degassed polyoxymethylene homo- or co-polymer (17) , supplied to an extruder (E) or mixer and mixed with normal additives and processing agents to give a polymer melt (19) with removal of a formaldehyde - containing extruder or mixer exhaust gas (18) from the extruder (E) or mixer , characterised in that the formaldehyde-containing by product streams (14, 16 , 18) are directly recycled to the monomer plant from the polymer plant withou t addition of adjuncts.

公开(公告)号：DE102005037293A1

公开(公告)日：2007-02-15

申请号：DE102005037293

申请日：2005-08-08

Applicant: BASF AG

Inventor： LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  SIEGERT MARKUS ,  HASSE HANS ,  GRUETZNER THOMAS ,  BLAGOV SERGEJ

IPC: C07D323/06

Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A2 comprising trioxane, water and formaldehyde; stream A2 is fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water and formaldehyde.

公开(公告)号：CA2617479A1

公开(公告)日：2007-02-15

申请号：CA2617479

申请日：2006-08-04

Applicant: BASF AG

Inventor： SIEGERT MARKUS ,  FRIESE THORSTEN ,  STROEFER ECKHARD ,  BLAGOV SERGEJ ,  GRUETZNER THOMAS ,  HASSE HANS ,  STAMMER ACHIM ,  LANG NEVEN

IPC: C07D323/06

Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A2 comprising trioxane, water and formaldehyde; stream A2 is fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water and formaldehyde.

公开(公告)号：DE50013064D1

公开(公告)日：2006-08-03

申请号：DE50013064

申请日：2000-12-21

Applicant: BASF AG

Inventor： DERNBACH MATTHIAS ,  KRATZ DETLEF ,  STAMMER ACHIM ,  RUST HARALD ,  SCHULZ GERHARD

IPC: C07C29/80 ,  C07B61/00 ,  C07C29/141 ,  C07C31/22

Abstract: A process is disclosed for the purification, by distillation, of trimethylolpropane originating from the hydrogenation of 2,2-dimethylolbutanal, said process including the following steps:(a) reaction of n-butyraldehyde with formaldehyde in the presence of catalytic amounts of a tertiary amine, and hydrogenation of the resulting mixture to give a mixture containing trimethylolpropane;(b) separation of water, methanol, trialkylamine and/or trialkylammonium formate by distillation;(c) heating of the residue obtained in (b) under reduced pressure to a temperature at which TMP is volatile and compounds boiling above TMP are cleaved, in order to separate off, by distillation, TMP and compounds more volatile than TMP;(d) distillation of the distillate obtained in (c) in order to separate off the more volatile compounds and recover pure TMP; and(e) optional distillation of the TMP obtained in (d) in order to recover TMP with a low APHA color index.A process is also disclosed in which trialkylammonium formate is distilled under mild conditions from crude mixtures of polyhydric alcohols, predominantly trimethylolpropane.

公开(公告)号：NO20062811A

公开(公告)日：2006-07-14

申请号：NO20062811

申请日：2006-06-15

Applicant: BASF AG

Inventor： STAMMER ACHIM ,  HASSE HANS ,  STROEFER ECKHARD ,  LANG NEVEN ,  SIEGERT MARKUS ,  FRIESE THORSTEN

IPC: C07D323/06

CPC classification number: C07D323/06

公开(公告)号：DE102004057867A1

公开(公告)日：2006-06-01

申请号：DE102004057867

申请日：2004-11-30

Applicant: BASF AG

Inventor： ASMANN JENS ,  ZOELLNER KNUT ,  HEINEMANN JOHANNES ,  STOECKELMANN ELMAR ,  STAMMER ACHIM

IPC: C08G2/00

Abstract: Preparation of polyoxymethylene (I) comprises polymerizing their monomers in the presence of cationically active initiators and optional regulators, subsequently deactivating and separating (I), where the polymerization is carried out in tubular reactor (A) (with static mixing element) comprising mixing-, polymerizing- and deactivating zones and the diameter of (A) in the mixing zone is less than 90% of the diameter in the polymerizing zone. An independent claim is also included for polyoxymethylene homo-/co-polymer obtained by the above method, where the quotient of d 50/d 100-value (related to M w) is 2.25-5.5.