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：DE50306115D1

公开(公告)日：2007-02-08

申请号：DE50306115

申请日：2003-05-19

Applicant: BASF AG

Inventor： WOELFERT ANDREAS ,  MUELLER CHRISTIAN ,  STROEFER ECKHARD ,  BRODHAGEN ANDREAS

IPC: C07C263/10 ,  B01J19/24 ,  C07C265/14

Abstract: The present invention relates to a continuous process for preparing isocyanates by reacting primary amines with phosgene, wherein the reaction is carried out in a cascade of at least two tube reactors and the gas phase formed in the reaction is separated off in a phase separator after each reactor and only the liquid phase is passed to the next reactor or to product purification and the reaction volume of the first tube reactor is only a fraction of the total reaction volume.

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：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：DE102004060320A1

公开(公告)日：2006-06-22

申请号：DE102004060320

申请日：2004-12-15

Applicant: BASF AG

Inventor： MUELLER CHRISTIAN ,  WEBER MARKUS ,  STROEFER ECKHARD ,  QUASCHNING VERONIKA ,  FADERL JUERGEN

IPC: C07C319/04 ,  C07C321/04

Abstract: Preparation of alkyl thiol (I) comprises adding hydrogen sulfide at the double bonds of 6-20C olefin at 20-150[deg]C and a pressure of 1-40 bar, where the reaction is carried out in the presence of an organic liquid acid (II).

公开(公告)号：DE102004053661A1

公开(公告)日：2006-05-04

申请号：DE102004053661

申请日：2004-11-03

Applicant: BASF AG

Inventor： SESING MARTIN ,  VOS HARTWIG ,  STROEFER ECKHARD ,  ROHDE THORSTEN ,  WOELFERT ANDREAS

IPC: C07C263/10 ,  C07C263/20

Abstract: The invention provides a process for preparing isocyanates by reacting the corresponding amines with phosgene in the presence of solvents, wherein compounds which form salt melts with hydrogen chloride are used as solvents.

公开(公告)号：DE50108849D1

公开(公告)日：2006-04-13

申请号：DE50108849

申请日：2001-02-14

Applicant: BASF AG

Inventor： WEBER MARKUS ,  STERZEL HANS-JOSEF ,  STROEFER ECKHARD ,  WATZENBERGER OTTO

IPC: C07C235/60 ,  C01B21/14 ,  C07C217/20

Abstract: N,N,N-Tri((het)aryl-(hetero)alk(en)yl, (het)aryl-(hetero)alkynyl and (het)aryl-(hetero)cycloalk(en)yl)-amines (I), with a total of not less than 6 alkoxy and hydroxy substituents, and their salts are new. N,N,N-Tri((het)aryl-(hetero)alk(en)yl, (het)aryl-(hetero)alkynyl and (het)aryl-(hetero)cycloalk(en)yl)-amines of formula (I), with a total of not less than 6 alkoxy and hydroxy substituents, and their salts are new: N(A 1>R 1>)(A 2>R 2>)(A 3>R 3>) (I) A 1>, A 2>, A 3>alkylene, alkenylene, alkynylene, cycloalkylene or cycolalkenylene groups, which may have 1, 2 or 3 substituents selected from alkoxy, hydroxy and keto and/or carbon (C) atom(s) replaced by heteroatom(s) selected from nitrogen (N), oxygen (O) and sulfur (S); R 1>, R 2>, R 3>aryl or 5- or 6-membered unsaturated heterocyclyl with 1, 2 or 3 N, O or S heteroatoms. A 1>, A 2>, A 3>, R 1>, R 2> and R 3> groups contain a total of not less than 6 alkoxy and hydroxy substituents. An independent claim is also included for stabilized hydroxylamine solutions containing compound(s) (I) as stabilizer.

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.