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公开(公告)号：EP1509512B1
公开(公告)日：2007-02-14
申请号：EP03752664.7
申请日：2003-05-13
发明人： FRIESE, Katrin , RAULS, Matthias , FREYHOF, Reinhard , FRIESE, Thorsten , ARMBRUSTER, Harald , ZEINER, Hartmut , EGBERS, Gitta , STRÖFER, Eckhard , HECK, Ludwig , HILDENBRAND, Peter
IPC分类号： C07D323/06
CPC分类号： C07D323/06
摘要： The invention relates to a method for producing trioxane by the trimerization of formaldehyde in an aqueous acidic solution and by subsequently separating out trioxane from a mixture (trioxane raw product) essentially consisting of trioxane, water and formaldehyde. The invention is characterized in that: a) the trioxane raw product from the trimerization is distilled; b) the trioxane is crystallized out; c) is separated out from the mother liquor; d) is subsequently melted, and; e) additional byproducts are removed by distillation.
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公开(公告)号：EP1819662A1
公开(公告)日：2007-08-22
申请号：EP05817984.7
申请日：2005-11-29
IPC分类号： C07C233/03 , C07C231/24
CPC分类号： C07C231/24 , C07C209/84 , C07C233/09 , C07C211/03
摘要： Disclosed is a method for purifying an open-chain N-vinyl compound by means of a crystallization process in a crystallizer in which crystallization is performed from a melt of a mixture containing an open-chain N-vinyl compound at a pressure ranging from 10-3 to 400 bar.
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公开(公告)号：EP1509512A1
公开(公告)日：2005-03-02
申请号：EP03752664.7
申请日：2003-05-13
发明人： FRIESE, Katrin , RAULS, Matthias , FREYHOF, Reinhard , FRIESE, Thorsten , ARMBRUSTER, Harald , ZEINER, Hartmut , EGBERS, Gitta , STRÖFER, Eckhard , HECK, Ludwig , HILDENBRAND, Peter
IPC分类号： C07D323/06
CPC分类号： C07D323/06
摘要： The invention relates to a method for producing trioxane by the trimerization of formaldehyde in an aqueous acidic solution and by subsequently separating out trioxane from a mixture (trioxane raw product) essentially consisting of trioxane, water and formaldehyde. The invention is characterized in that: a) the trioxane raw product from the trimerization is distilled; b) the trioxane is crystallized out; c) is separated out from the mother liquor; d) is subsequently melted, and; e) additional byproducts are removed by distillation.
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4.发明公开
公开(公告)号：EP1284953A1
公开(公告)日：2003-02-26
申请号：EP01949354.3
申请日：2001-05-21
IPC分类号： C07C51/43 , C07C59/105
CPC分类号： C07C51/43 , C07C59/105
摘要： The invention relates to a method for the selective crystallization of poly- or monomethylol alkanoic acids of the general formula (I), wherein R is the same or different and represents a methylol group or a substituted or unsubstituted aliphatic hydrocarbon, with an essentially monomodal particle size distribution. This particle size distribution is achieved by crystallization in a temperature interval of from 85 °C to 50 °C observing a cooling rate of
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5.发明授权Verfahren zur Herstellung von Dicarbonsäurekristallisaten 失效Verfahren zur Herstellung vonDicarbonsäurekristallisaten
公开(公告)号：EP0968167B1
公开(公告)日：2002-09-25
申请号：EP98906938.0
申请日：1998-02-09
摘要： The invention relates to a method of producing dicarboxlic acid crystallizates from a solution containing at least one organic dicarboxylic acid, wherein at least one anionic polyelectrolyte with a molar mass of at least 2.000 is added to the solution before or during crystallization.
摘要翻译： 本发明涉及由含有至少一种有机二羧酸的溶液制备二羧酸结晶物的方法，其中在结晶之前或结晶过程中将至少一种摩尔质量为至少2.000的阴离子聚电解质加入溶液中。
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6.发明公开VERFAHREN ZUR ISOLIERUNG VON SALZEN VON ORGANISCHEN SÄUREN AUS EINER FERMENTATIONSBRÜHE UND ZUR FREISETZUNG DER ORGANISCHEN SÄURE 审中-公开一种用于从发酵液和RELEASE有机酸的有机酸的盐的隔震
公开(公告)号：EP1436245A1
公开(公告)日：2004-07-14
申请号：EP02785181.5
申请日：2002-10-09
IPC分类号： C07C51/42 , C07D307/62 , C07C59/235 , C12P7/60
CPC分类号： C07D307/62 , C07C51/42 , C07C59/08 , C07C59/265 , C07C59/235
摘要： The present invention relates to a method for isolating salts of organic acids from an aqueous solution, in particular from a fermentation broth, by partial evaporation crystallization and consecutive or simultaneous displacement precipitation of said salts, as well as for releasing the organic acid from the crystallizate, preferably by an electromembrane process.
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7.发明公开VERFAHREN ZUR ISOLIERUNG VON METHYLGLYCINNITRIL-N,N-DIACETONITRILEN AUS EINEM WÄSSRIGEN ROHGEMISCH 有权METHOD FOR ISOLATING methylglycinenitrile-N，N-DIACETONITRILEN从含水粗
公开(公告)号：EP1883623A1
公开(公告)日：2008-02-06
申请号：EP06754975.8
申请日：2006-05-03
发明人： OFTRING, Alfred , JUDAT, Bernd , RAULS, Matthias , FRIESE, Katrin
IPC分类号： C07C253/34 , C07C255/24 , C07C255/25
CPC分类号： C07C253/34 , C07C255/24 , C07C255/25
摘要： The invention relates to a method for isolating methyl glycine nitrile-N,N-diacetonitriles (MGDN) from an MGDN-containing aqueous emulsion with an MGDN content of 3 - 50% by weight in a crystallizer. The inventive method is characterized by (a) cooling the aqueous emulsion, starting from a temperature above the solidification point, to a temperature below the solidification point, the cooling rate in the temporal mean not exceeding 5 K/h, until substantially the total amount of the emulsified MGDN has solidified; and (b) continuing to cool the aqueous suspension obtained and/or concentrating it, the cooling rate being higher than that in step (a).
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公开(公告)号：EP0968167A1
公开(公告)日：2000-01-05
申请号：EP98906938.0
申请日：1998-02-09
摘要： The invention relates to a method of producing dicarboxlic acid crystallizates from a solution containing at least one organic dicarboxylic acid, wherein at least one anionic polyelectrolyte with a molar mass of at least 2.000 is added to the solution before or during crystallization.
摘要翻译： 本发明涉及由含有至少一种有机二羧酸的溶液制备二羧酸结晶物的方法，其中在结晶之前或结晶过程中将至少一种摩尔质量为至少2.000的阴离子聚电解质加入溶液中。
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