公开(公告)号：DE10295499B4

公开(公告)日：2007-04-19

申请号：DE10295499

申请日：2002-11-28

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  ARMBRUSTER HARALD ,  EGBERS GITTA ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  HECK LUDWIG E ,  HILDENBRAND PETER ,  ZEINER HARTMUT ,  SCHOLL STEPHAN ,  GOERTZ HANS-HELMUT

IPC: C08G2/08 ,  C08G4/00

公开(公告)号：DE50306511D1

公开(公告)日：2007-03-29

申请号：DE50306511

申请日：2003-05-13

Applicant: BASF AG

Inventor： FRIESE KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROEFER ECKHARD ,  HECK LUDWIG ,  HILDENBRAND PETER

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：AT353883T

公开(公告)日：2007-03-15

申请号：AT03752664

申请日：2003-05-13

Applicant: BASF AG

Inventor： FRIESE KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROEFER ECKHARD ,  HECK LUDWIG ,  HILDENBRAND PETER

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：DE102005037294A1

公开(公告)日：2007-02-15

申请号：DE102005037294

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, in a first step, a stream A 1 comprising water and formaldehyde and a recycle stream B 2 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 A 2 comprising trioxane, water and formaldehyde. Stream A 2 and a recycle stream D 1 comprising trioxane, water and formaldehyde are 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 B 1 enriched in trioxane, and the stream B 2 consisting substantially of water and formaldehyde. Stream B 1 is 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 C 2 consisting substantially of trioxane, and a stream C 1 comprising trioxane, water and formaldehyde. Stream C 1 is fed to a third distillation column and distilled at a pressure in the range from 1 to 10 bar to obtain the recycle stream D 1 comprising trioxane, water and formaldehyde, and a stream D 2 consisting substantially of water.

公开(公告)号：DE102005010587A1

公开(公告)日：2006-06-08

申请号：DE102005010587

申请日：2005-03-08

Applicant: BASF AG

Inventor： HABECK THORSTEN ,  RAUH ULRICH ,  FRIESE THORSTEN ,  MARTAN HANS

IPC: C07C67/54 ,  C07C67/08 ,  C07C67/48 ,  C07C69/54

Abstract: Continuous preparation of alkyl ester of (meth)acrylic acid (A) comprises supplying (meth)acrylic acid, 1-5C alkanol and acid esterifying catalyst (a) to a reaction zone (5,6); adding the discharged reaction mixture to a rectification unit (I); isolating the alkyl ester of (meth)acrylic acid containing in main stream (23) and a sump stream (22); supplying a partial flow of the sump stream; and isolating the separated sump stream (40). Continuous preparation of alkyl ester of (meth)acrylic acid (A) comprises reacting (meth)acrylic acid and 1-5C alkanol in homogeneous, liquid, solvent-free phase with increased temperature and in presence of a acid esterifying catalyst, where (meth)acrylic acid, alkanol and acid esterified catalyst are supplied to a reaction zone (5,6) (that water formed during a retention time are separated rectificative as a component of a alkanol comprising mixture in one of the reaction zone mounted rectification unit (III), in which obtained distillate is isolated in a alkanol containing organic and a water containing aqueous phase, the organic phase is led back into (III) and the aqueous phase is removed, and a reaction mixture (21) is discharged from the reaction zone); initiating the mixture into a rectification unit (I) and the alkyl ester of (meth)acrylic acid containing in main stream (23) and a sump stream (22) are isolated under addition of water; supplying a partial flow of the sump stream (22) from (I) of a residue column unit (IV) comprising a column boiler (61) and recycling into a main stream (29) in (I) and isolating the separated sump stream (40); where (IV) comprises a rectification column (62) in addition to the column boiler, and the ascending vapors from the column boiler are initiated into the rectification column, and resulting liquid at the lowest stage of the rectifying column is led into the column boiler, where the rectification column is operated in a manner, such that the water content of the resulting liquid at the lowest stage is smaller than 0.1 wt.%.

公开(公告)号：PL374560A1

公开(公告)日：2005-10-31

申请号：PL37456003

申请日：2003-05-13

Applicant: BASF AG

Inventor： FRIESE KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROEFER ECKHARD ,  HECK LUDWIG ,  HILDENBRAND PETER

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：AU2004309046A1

公开(公告)日：2005-07-14

申请号：AU2004309046

申请日：2004-12-21

Applicant: BASF AG

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

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：AU2003232760A8

公开(公告)日：2003-12-02

申请号：AU2003232760

申请日：2003-05-13

Applicant: BASF AG

Inventor： HECK LUDWIG ,  HILDENBRAND PETER ,  EGBERS GITTA ,  FREYHOF REINHARD ,  ARMBRUSTER HARALD ,  STROFER ECKHARD ,  FRIESE KATRIN ,  FRIESE THORSTEN ,  RAULS MATTHIAS ,  ZEINER HARTMUT

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：DE10222163A1

公开(公告)日：2003-11-27

申请号：DE10222163

申请日：2002-05-17

Applicant: BASF AG

Inventor： WAGNER KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROEFER ECKHARD ,  HECK LUDWIG E ,  HILDENBRAND PETER

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

公开(公告)号：MX2008001005A

公开(公告)日：2008-03-25

申请号：MX2008001005

申请日：2006-08-04

Applicant: BASF AG

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

IPC: C07D323/06

Abstract: La invencion se relaciona con un proceso integrado para prepara trioxano de formaldehido en el que una corriente A1 que comprende agua y formaldehido y una corriente B2 de reciclado que consiste substancialmente de agua y formaldehido se alimentan a un reactor de sintesis de trioxano en el que el formaldehido se convierte en trioxano para obtener una corriente A2 de producto que comprende trioxano, agua y formaldehido; la corriente A2 se alimenta a una primera columna de destilacion y se destila a una presion en la escala de 0.1 a 2.5 bar para obtener una corriente B1 enriquecida en trioxano, y la corriente B2 que consiste substancialmente de agua y formaldehido; la corriente B1 y la corriente D1 de reciclado que comprende trioxano, agua y formaldehido se alimentan a una segunda columna de destilacion y se destilan a una presion en la escala de 0.2 a 17.5 bar para obtener una corriente C2 de producto que consiste substancialmente detrioxano, y una corriente C1 que comprende trioxano, agua y formaldehido; la corriente C1 se alimenta a una tercera columna de destilacion y se destila a una presion en la escala de 0.1 a 2.5 bar para obtener la corriente D1 de reciclado que comprende trioxano, agua y formaldehido, y una corriente D2 que consiste substancialmente de agua y formaldehido. (Figura 1).