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公开(公告)号：EP1723094A1
公开(公告)日：2006-11-22
申请号：EP05715282.9
申请日：2005-02-10
发明人： RUMPF, Bernd , STROEFER, Eckhard , LANG, Ortmund , LANG, Neven
IPC分类号： C07C47/058
摘要： The invention relates to a method for producing a highly concentrated formaldehyde solution by the separation of water from a lower-concentration formaldehyde solution with a formaldehyde content of between 5 and 50 wt. %. According to said method, the lower-concentration formaldehyde solution is supplied to a preheater, where it is heated. The solution is then expanded by means of a pressure maintenance device and subsequently concentrated in a spiral evaporator to obtain a vapour stream and the highly concentrated formaldehyde solution as the bottom stream. Said method is characterised in that the heated lower-concentration formaldehyde solution in the pressure maintenance device is expanded to form a two phase mixture, which is supplied to the spiral evaporator.
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公开(公告)号：EP1601435B1
公开(公告)日：2006-11-08
申请号：EP04716558.4
申请日：2004-03-03
摘要： The invention relates to a method for separating a liquid substance mixture containing at least one highly volatile and at least one low-volatile constituent, in a film evaporator during which: (i) a continuous flow of a liquid starting substance mixture is prepared; (ii) a liquid film is produced from the continuous flow and brought into contact with a heat exchanger surface of the film evaporator, and; (iii) the liquid film is partially evaporated thereby obtaining a gas flow, which is enriched with the at least one highly volatile constituent, and a liquid flow, which is enriched with the at least one low-volatile constituent. The invention is characterized in that: (iv) the heat exchanger surface is coated with a catalytically active material, which; (v) catalyzes a chemical reaction in the liquid film during which at least one highly volatile constituent is formed.
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3.发明授权
公开(公告)号：EP1805162B1
公开(公告)日：2008-01-23
申请号：EP05798084.9
申请日：2005-10-20
IPC分类号： C07D323/06
CPC分类号： C07D323/06
摘要： The invention relates to a trioxane production method comprising the following stages: catalysed reaction in an acid medium of an aqueous highly concentrated formaldehyde solution (1) in a reactor (R) for obtaining a trioxane/formaldehyde/water mixture (2) (stage I); distillation of said trioxane/formaldehyde/water mixture (2) of the stage I for obtaining a raw trioxane as a head flow (3) (stage II), distillation treatment of the raw dioxane of the stage II in one or several stages for obtaining a pure dioxane (8), wherein a side aqueous flow (4) is deducted during the stage II.
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4.发明公开VERFAHREN ZUR ABTRENNUNG VON TRIOXAN AUS EINEM TRIOXAN/FORMALDEHYD/WASSER-GEMISCH MITTELS DRUCKWECHSEL-REKTIFIKATION 有权方法分离三恶烷的三恶烷/甲醛/水混合物在压力变化精馏的方式
公开(公告)号：EP1699776A1
公开(公告)日：2006-09-13
申请号：EP04804133.9
申请日：2004-12-21
发明人： SIEGERT, Markus , LANG, Neven , STROEFER, Eckhard , STAMMER, Achim , FRIESE, Thorsten , HASSE, Hans
IPC分类号： C07D323/06
CPC分类号： C07D323/06
摘要： 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 component 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) distilling 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), optionally after separating materials at a low-boiling point from the flow (III) in a low-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 flow (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 contains trioxane as the main component and water and formaldehyde as the auxiliary components, are obtained.
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公开(公告)号：EP1699551A1
公开(公告)日：2006-09-13
申请号：EP04804266.7
申请日：2004-12-23
发明人： OLBERT, Gerhard , JOHANN, Thorsten , WEBER, Markus , LANG, Neven , HARTH, Klaus , STRÖFER, Eckhard , FIENE, Martin , SIEGERT, Markus
IPC分类号： B01J8/02
CPC分类号： F28D9/0031 , B01J8/0214 , B01J8/0285 , B01J8/0415 , B01J8/0419 , B01J8/0496 , B01J19/249 , B01J2208/0015 , B01J2208/00513 , B01J2208/025 , B01J2219/1923 , B01J2219/2453 , B01J2219/2455 , B01J2219/2458 , B01J2219/2459 , B01J2219/2462 , B01J2219/2481 , B01J2219/2485 , C07C45/38 , F28F2250/104 , C07C47/04
摘要： The invention relates to a method for the production of formaldehyde by gas phase oxidation of methanol vapour with a gas flow containing a molecular oxygen in the presence of solid bed catalyst containing iron and molybdenum. The invention is characterised in that the method is carried out in a reactor (1) comprising thermal sheet metal plates (2) which are arranged at a distance from each other and in the longitudinal direction of the reactor (1), said thermal sheet metal plates being cross-flown by a heat carrier. The reactor also comprises devices for supplying and withdrawing (3, 4) the heat carrier to/from the thermal sheet steel plates (2), and gaps (5), which are disposed between the thermal sheet steel metal plates (2) and which are filled with the solid bed catalyst and are introduced into the gas flow containing the methanol vapour and the molecular oxygen.
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公开(公告)号：EP1781634A1
公开(公告)日：2007-05-09
申请号：EP05775120.8
申请日：2005-08-18
IPC分类号： C07D323/06 , B01D3/14
CPC分类号： B01D3/146 , B01D3/141 , C07D323/06
摘要： The invention relates to a method for the separation by distillation of pure trioxane from a supply flow (I) containing trioxane in a mass proportion of at least 50 wt. % in relation to the total weight of the supply flow (I), in addition to formaldehyde and water. Said method is characterised in that the supply flow (I) and another flow (II) which contains water but does not contain any constituents foreign to the supply flow, are supplied to a dividing wall column (TWK1) comprising an essentially perpendicular dividing wall TW which divides the inside of the column into a supply region (A1), a delivery region (B1), an upper common column region (C1), and a lower common column region (D1). A bottom flow (III) containing pure trioxane and a lateral flow (IV) containing pure water are removed from the delivery region (B1), at the first dividing wall column (TWK1).
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公开(公告)号：EP1601435A1
公开(公告)日：2005-12-07
申请号：EP04716558.4
申请日：2004-03-03
摘要： The invention relates to a method for separating a liquid substance mixture containing at least one highly volatile and at least one low-volatile constituent, in a film evaporator during which: (i) a continuous flow of a liquid starting substance mixture is prepared; (ii) a liquid film is produced from the continuous flow and brought into contact with a heat exchanger surface of the film evaporator, and; (iii) the liquid film is partially evaporated thereby obtaining a gas flow, which is enriched with the at least one highly volatile constituent, and a liquid flow, which is enriched with the at least one low-volatile constituent. The invention is characterized in that: (iv) the heat exchanger surface is coated with a catalytically active material, which; (v) catalyzes a chemical reaction in the liquid film during which at least one highly volatile constituent is formed.
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8.发明公开
公开(公告)号：EP1805162A1
公开(公告)日：2007-07-11
申请号：EP05798084.9
申请日：2005-10-20
IPC分类号： C07D323/06
CPC分类号： C07D323/06
摘要： The invention relates to a trioxane production method comprising the following stages: catalysed reaction in an acid medium of an aqueous highly concentrated formaldehyde solution (1) in a reactor (R) for obtaining a trioxane/formaldehyde/water mixture (2) (stage I); distillation of said trioxane/formaldehyde/water mixture (2) of the stage I for obtaining a raw trioxane as a head flow (3) (stage II), distillation treatment of the raw dioxane of the stage II in one or several stages for obtaining a pure dioxane (8), wherein a side aqueous flow (4) is deducted during the stage II.
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9.发明公开VERFAHREN ZUR ABTRENNUNG VON TRIOXAN AUS EINEM TRIOXAN/FORMALDEHYD/WASSER-GEMISCH 有权方法分离三恶烷的三恶烷/甲醛/水混合物
公开(公告)号：EP1699537A1
公开(公告)日：2006-09-13
申请号：EP04804129.7
申请日：2004-12-21
发明人： LANG, Neven , STROEFER, Eckhard , STAMMER, Achim , FRIESE, Thorsten , SIEGERT, Markus , OTT, Michael , HASSE, Hans , GRÜTZNER, Thomas , BLAGOV, Sergej
IPC分类号： B01D3/36 , C07D323/06 , B01D3/14
CPC分类号： C07D323/06 , B01D3/146 , B01D3/36 , Y02P20/127
摘要： The invention relates to a method for separating trioxane from a mixture containing formaldehyde, trioxane and water. According to said method: the mixture (1) is distilled in a first distillation stage (7) at a pressure of between 0.1 and 2 bar to obtain a stream (8) containing formaldehyde and a stream (9) containing predominantly trioxane, in addition to water and formaldehyde; the stream (9) is mixed with a recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde to form a stream (10) containing predominantly trioxane, in addition to water and formaldehyde; the stream (10) is then distilled in a second distillation stage (14) at a pressure of between 0.2 and 10 bar, optionally after the separation of low-boilers from the stream (9) or (10) in an additional distillation stage (11). The pressure in the second distillation stage (14) is at least 0.1 bar higher than the pressure in the first distillation stage (7). Said distillation produces a stream (15) consisting of trioxane and a stream (16) containing predominantly trioxane, in addition to water and formaldehyde. The stream (16) is then distilled in a third distillation stage (17) at a pressure of between 0.1 and 4 bar, to obtain a stream (18) containing predominantly water, in addition to formaldehyde and the recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde. The resultant stream (18) is optionally distilled in a fourth distillation stage (20), to obtain a stream (21) containing predominantly water and a stream (22) containing predominantly formaldehyde.
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10.发明公开
公开(公告)号：EP1606241A2
公开(公告)日：2005-12-21
申请号：EP04717071.7
申请日：2004-03-04
发明人： STROEFER, Eckhard , LANG, Neven , HASSE, Hans , GRUETZNER, Thomas , OTT, Michael
IPC分类号： C07C47/058
CPC分类号： C07C45/002 , C07C45/82 , C07C47/04
摘要： A method for the production of highly concentrated formaldehyde solutions containing ≥ 50 wt. % CH2O from an aqueous formaldehyde solution having a lower CH2O content by evaporating part of said solution (partial evaporation), wherein the aqueous formaldehyde solution is heated to an evaporation temperature T wherein water becomes enriched in a gaseous phase in relation to the liquid phase and the formed gas phase is continuously or discontinuously removed. For the evaporation temperature T: T [ °C]
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