METODO INTEGRADO PARA LA PRODUCCION DE TRIOXANO A PARTIR DE FORMALDEHIDO.

    公开(公告)号:MX2008001002A

    公开(公告)日:2008-03-25

    申请号:MX2008001002

    申请日:2006-08-01

    Applicant: BASF AG

    Abstract: La invencion se relaciona con un proceso integrado para preparar trioxano a partir de formaldehido en el que, en un primer paso, 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 y la corriente D1 de reciclado que comprende trioxano, agua y formaldehido se alimentan a una primera columna de destilacion y se destilan 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 se alimenta a una segunda columna de destilacion y se destila a una presion en la escala de 0.2 a 17.-5 bar para obtener una corriente C2 de producto que consiste substancialmente de trioxano, y una corriente C1 que comprende trioxano, agua y formaldehido. La corriente C1 se alimenta a una tercer acolumna de destilacion y se destila a una presion en la escala de 1 a 10 bar para obtener la corriente D1 de reciclado que comprende trioxano, agua y formaldehido, y una corriente D2 que consiste substancialmente de agua.

    22.
    发明专利
    未知

    公开(公告)号:BRPI0417859A

    公开(公告)日:2007-04-27

    申请号:BRPI0417859

    申请日:2004-12-21

    Applicant: BASF AG

    Abstract: A process for removing trioxane from a mixture I of formaldehyde, trioxane and water, by a) distilling the mixture I in a first distillation stage at a pressure of from 0.1 to 2 bar to obtain a stream II which comprises formaldehyde and a stream III which comprises predominantly trioxane and additionally water and formaldehyde, b) mixing the stream III with a recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde to obtain a stream IIIa which comprises predominantly trioxane and additionally water and formaldehyde, c) distilling the stream IIIa, if appropriate after removing low boilers from the stream III or IIIa in a further distillation stage, in a second distillation stage at a pressure of from 0.2 to 10 bar, the pressure in the second distillation stage being at least 0.1 bar higher than the pressure in the first distillation stage, to obtain a stream IV of trioxane and a stream V which comprises predominantly trioxane and additionally water and formaldehyde, d) distilling the stream V in a third distillation stage at a pressure of from 0.1 to 4 bar to obtain a stream VI which comprises predominantly water and additionally formaldehyde, and the recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde, e) if appropriate, distilling the stream VI in a fourth distillation stage to obtain a stream VIII which comprises predominantly water, and a stream IX which comprises predominantly formaldehyde.

    23.
    发明专利
    未知

    公开(公告)号:DE102005036544A1

    公开(公告)日:2007-02-15

    申请号:DE102005036544

    申请日:2005-08-03

    Applicant: BASF AG

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde, comprising the steps of: a) 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 and allowed to react to obtain a product stream A 2 comprising trioxane, water and formaldehyde; b) stream A 2 is fed to a first low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream B 1 enriched in trioxane and additionally comprising water and formaldehyde, and the recycle stream B 2 consisting substantially of formaldehyde and water; c) stream B 1 and a recycle stream D 1 comprising trioxane, water and formaldehyde are fed to a second low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream C 1 comprising predominantly trioxane and additionally formaldehyde and water, and a stream C 2 consisting substantially of formaldehyde and water; d) stream C 1 is fed to a high-pressure distillation column and distilled at a pressure of from 0.2 to 17.5 bar to obtain the recycle stream D 1 and a product stream D 2 consisting substantially of trioxane, in which a removal of the low boilers present in streams B 1 or C 1 may be undertaken between steps b) and c) or c) and d).

    24.
    发明专利
    未知

    公开(公告)号:NO20062811L

    公开(公告)日:2006-07-14

    申请号:NO20062811

    申请日:2006-06-15

    Applicant: BASF AG

    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.

    25.
    发明专利
    未知

    公开(公告)号:DE102004040284A1

    公开(公告)日:2006-02-23

    申请号:DE102004040284

    申请日:2004-08-19

    Applicant: BASF AG

    Abstract: The present invention relates to a process for distillatively removing pure trioxane from a feedstream (I) comprising trioxane in a proportion of at least 50% by weight, based on the total weight of the feedstream (I), and additionally formaldehyde and water, which comprises feeding the feedstream I and a further aqueous stream (II) which does not contain any components extraneous to the feedstream to a dividing wall column (TWK 1 ) having a dividing wall TW which is arranged substantially perpendicularly and divides the column interior into a feed region (A 1 ), a withdrawal reaction (B 1 ), an upper combined column region (C 1 ) and a lower combined column region (D 1 ), and drawing off from the first dividing wall column (TWK 1 ) a bottom stream (III) comprising pure trioxane and a sidestream (IV) at the withdrawal region (B 1 ), comprising pure water.

    26.
    发明专利
    未知

    公开(公告)号:DE10361518A1

    公开(公告)日:2005-07-28

    申请号:DE10361518

    申请日:2003-12-23

    Applicant: BASF AG

    Abstract: A process for removing trioxane from a mixture I of formaldehyde, trioxane and water, by a) distilling the mixture I in a first distillation stage at a pressure of from 0.1 to 2 bar to obtain a stream II which comprises formaldehyde and a stream III which comprises predominantly trioxane and additionally water and formaldehyde, b) mixing the stream III with a recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde to obtain a stream IIIa which comprises predominantly trioxane and additionally water and formaldehyde, c) distilling the stream IIIa, if appropriate after removing low boilers from the stream III or IIIa in a further distillation stage, in a second distillation stage at a pressure of from 0.2 to 10 bar, the pressure in the second distillation stage being at least 0.1 bar higher than the pressure in the first distillation stage, to obtain a stream IV of trioxane and a stream V which comprises predominantly trioxane and additionally water and formaldehyde, d) distilling the stream V in a third distillation stage at a pressure of from 0.1 to 4 bar to obtain a stream VI which comprises predominantly water and additionally formaldehyde, and the recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde, e) if appropriate, distilling the stream VI in a fourth distillation stage to obtain a stream VIII which comprises predominantly water, and a stream IX which comprises predominantly formaldehyde.

    METHOD FOR SEPARATING TRIOXANE FROM A TRIOXANE/FORMALDEHYDE/WATER MIXTURE BY MEANS OF PRESSURE CHANGE RECTIFICATION

    公开(公告)号:CA2549897A1

    公开(公告)日:2005-07-14

    申请号:CA2549897

    申请日:2004-12-21

    Applicant: BASF AG

    Abstract: The invention relates to a method for separating trioxane from an inlet flow (I) consisting of formaldehyde, trioxane and water.Said method consists in a ) preparing an inlet flow (I), which contains formaldehyde as the main compone nt and trioxane and water as auxiliary components, b) mixing the inlet flow (I) with a return flow (VII) containing trioxane as the main component and formaldehyde and water as auxiliary components. An inlet flow (Ia), which contains formaldehyde as the main component and trioxane and water as the auxiliary components, is obtained. Said method also consists in c) distillin g the inlet flow (Ia) in a first distillation step at a pressure of between 0. 1 2.5 bars, thus enabling a flow (II), which contains formaldehyde as the main component and water as the auxiliary component, and a flow (III), which contains trioxane as the main component and water and formaldehyde as the auxiliary components, to be obtained, d) distilling the flow (III), optional ly after separating materials at a low-boiling point from the flow (III) in a l ow- boiling separation step and in a second distillation step at a pressure of between 0.2 17.5 bars, whereby the pressure in the second distillation step is 0.1 - 15 bars higher than the pressure in the first distillation step. A flo w (IV) is obtained which is essentially made of trioxane, and also a flow V which contains trioxane as the main component and water and formaldehyde as the auxiliary components, e) optionally mixing the flow (V) with a flow (IX) , which contains water as the main component, in order to obtain a flow (Va) having a higher water content than flow (V), whereby flow (Va) contains trioxane as the main component and water and formaldehyde as the auxiliary components, f) distilling the flow (V) and/or flow (Va) in a third in distillation step at a pressure of between 1 - 10 bars, whereby a flow (VI), which is essentially made of water, and the return flow (VII), which contain s trioxane as the main component and water and formaldehyde as the auxiliary components, are obtained.

    DISTILLATIVE REMOVAL OF PURE TRIOXANE

    公开(公告)号:MY138442A

    公开(公告)日:2009-06-30

    申请号:MYPI20053647

    申请日:2005-08-04

    Applicant: BASF AG

    Abstract: THE PRESENT INVENTION RELATES TO A PROCESS FOR DISTILLATIVELY REMOVING PURE TRIOXANE FROM A FEEDSTREAM (I) COMPRISING TRIOXANE IN A PROPORTION OF AT LEAST 50% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE FEEDSTREAM (I), AND ADDITIONALLY FORMALDEHYDE AND WATER, WHICH COMPRISES FEEDING THE FEEDSTREAM I AND A FURTHER AQUEOUS STREAM (II) WHICH DOES NOT CONTAIN ANY COMPONENTS EXTRANEOUS TO THE FEEDSTREAM TO A DIVIDING WALL COLUMN (TWK1) HAVING A DIVIDING WALL TW WHICH IS ARRANGED SUBSTANTIALLY PERPENDICULARLY AND DIVIDES THE COLUMN INTERIOR INTO A FEED REGION (A1), A WITHDRAWAL REACTION (B1), AN UPPER COMBINED COLUMN REGION (C1) AND A LOWER COMBINED COLUMN REGION (D1), AND DRAWING OFF FROM THE FIRST DIVIDING WALL COLUMN (TWK1) A BOTTOM STREAM (III) COMPRISING PURE TRIOXANE AND A SIDESTREAM (IV) AT THE WITHDRAWAL REGION (B1), COMPRISING PURE WATER.FIG. 1

    REMOVAL OF TRIOXANE FROM A TRIOXANE/FORMALDEHYDE/WATER MIXTURE BY MEANS OF PRESSURE-SWING RECTIFICATION

    公开(公告)号:MY137873A

    公开(公告)日:2009-03-31

    申请号:MYPI20045310

    申请日:2004-12-22

    Applicant: BASF AG

    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.

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