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：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：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：DE102005027690A1

公开(公告)日：2006-12-21

申请号：DE102005027690

申请日：2005-06-15

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  SCHELLING HEINER ,  HASSE HANS

IPC: C07C41/48 ,  C07C41/58 ,  C07C43/303

Abstract: A process for preparing polyoxymethylene dialkyl ethers of the formula H2m+1CmO(CH2O)nCmH2m+1 where n=2-10, m, identically or differently,=1 or 2, in which a dialkyl ether selected from dimethyl ether, methyl ethyl ether and diethyl ether, and trioxane are fed into a reactor and reacted in the presence of an acidic catalyst, the amount of water introduced into the reaction mixture by the dialkyl ether, trioxane and/or the catalyst being

公开(公告)号：CA2612277A1

公开(公告)日：2006-12-21

申请号：CA2612277

申请日：2006-06-12

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  BLAGOV SERGEJ ,  HASSE HANS

IPC: C08G2/08 ,  C07C41/56

Abstract: The invention relates to a method for producing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) by reacting formaldehyde with methanol followed by a distillative processing of the reaction mixture with the following steps: a) feeding an aqueous formaldehyde solution and methanol in to a reactor and reacting; b) feeding reaction mixture a into a reactive evaporator and separating it into a low-boiling fraction b1 containing formaldehyde, water, methanol, methylene glycol, polyoxymethylene glycols, hemiformals, methylal and polyoxymethylene glycol dimethyl ether (POMDMEn> ;i) and a high-boiling fraction b2 and returning the high-boiling fraction b2 in to the reactor (step a)); c) feeding the low-boiling fraction b1 into a first distillation column and separating it into a low-boiling fraction c1 containing formaldehyde, water, methylene glycol, methanol, hemiformals, methylal, di-, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=2,3,4) and into a high-boiling fraction c2 and returning the high- boiling fraction c2 into the reactive evaporator (step b)); d) feeding the l ow- boiling fraction c1 into a second distillation column and separating it into a low-boiling fraction d1 and into a high-boiling fraction d2 consisting of formaldehyde, water, methylene glycol, polyoxymethylene glycols, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); e) feeding the high- boiling fraction d2 into a phase separating apparatus and separating it into an aqueous phase e1 consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols and into an organic phase e2 containing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); f) feeding the organi c phase e2 into a third distillation column and separating it into a low-boili ng fraction f1 consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols and into a high-boiling fraction f2 consisting of t ri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4).

公开(公告)号：CA2610936A1

公开(公告)日：2006-12-21

申请号：CA2610936

申请日：2006-06-12

Applicant: BASF AG

Inventor： STROFER ECKHARD ,  SCHELLING HEINER ,  HASSE HANS ,  BLAGOV SERGEJ

IPC: C07C41/50 ,  C07C43/30

Abstract: The invention relates to a method for production of polyoxymethylene dialkyl ethers of formula H2m+1CmO(CH2O)nCmH2m+1, where n = 2 - 10, m independently = 1 or 2, in which a dialkyl ether selected from dimethyl ether, methyl ethyl ether or diethyl ether and trioxan are fed into a reactor and reacted in the presence of an acid catalyst, whereby the amount of water introduced into the reaction mixture with the dialkyl ether, trioxan and/or the catalyst is

公开(公告)号：SA1059B1

公开(公告)日：2006-07-31

申请号：SA99200782

申请日：1999-11-30

Applicant: BASF AG

Inventor： ADRIAN TILL ,  BEBLING BERND ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: الملخص: عمليةللإستخلاصالتقطيريلاحاديايثيلينجيكول monoethylene glycol منناتجالتحللالمائيلاكسيدالايثيلين ethylene oxide بواسطةنزعالماءبالضغطو نزعالماءتحتالتفريغو تقطيرالتنقيةالتالي،و تشتملعلىاعمدةلنزعالماءبالضغطاوعلىالاقليكونعمودنزعالماءتحتالضغطالاولمنالمجموهةالمتواحدة (٢و٣و٤) بهمنطقةنزعذاتمرحلةفلصلواحدةعلىالاقل، ويفضلانيكونبها٢ الى 10 مراحلفصل، وبصفةخاصةيفضلذات٣ الى٦ مراحلفصل، وتمازالةجزءمنالتيارالعليمنعمود (اعمدة) نزعالماءبالضغط (٣و ٤و ٥) الذيبهمنطقةنزع،منالنظام.،

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：BRPI0408031A

公开(公告)日：2006-02-14

申请号：BRPI0408031

申请日：2004-03-04

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  GRUETZNER THOMAS ,  HASSE HANS

IPC: C07C45/78 ,  C07C45/82 ,  C07C47/058

Abstract: Method of stabilizing high-concentration formaldehyde solutions having a CH 2 O content of >70% by weight against precipitation of solids, which comprises heating the high-concentration formaldehyde solution at a heating rate of at least 5° C./min to a temperature of from 80° C. to 200° C. immediately after it has been prepared and storing it at a temperature in this range.