公开(公告)号：DE10037507A1

公开(公告)日：2002-02-14

申请号：DE10037507

申请日：2000-08-01

Applicant: BASF AG

Inventor： HENNIG GUNNAR ,  STROEFER ECKHARD ,  FREUDENTHALER EVA

IPC: C07C303/16 ,  C07C309/04 ,  C07C309/80 ,  C07C303/18 ,  C07C309/02 ,  C07C309/72

Abstract: The invention relates to a method for producing C1-C4 alkylsulfonic chorides and/or C1-C4 alkanesulfonic acids by reacting di(C1-C4) alkyl-disulfides with chlorine and water. The method is characterized in that the mixture of a di(C1-C4) alkyldisulfide and water is treated with chlorine in a column, in a countercurrent.

公开(公告)号：DE10008080A1

公开(公告)日：2001-08-23

申请号：DE10008080

申请日：2000-02-22

Applicant: BASF AG

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

IPC: C01B21/14 ,  C07C217/20 ,  C07C235/60 ,  C07C235/50 ,  C07B63/04

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：NO20000551D0

公开(公告)日：2000-02-03

申请号：NO20000551

申请日：2000-02-03

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROEFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14 ,  C01B

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

公开(公告)号：CA2293319A1

公开(公告)日：1998-12-23

申请号：CA2293319

申请日：1998-06-18

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  SCHELLING HEINER ,  WATZENBERGER OTTO ,  PFAB PETER

IPC: B01D3/00 ,  C01B21/14

Abstract: The invention relates to a method for the production of highly pure aqueous solution from free hydroxylamine, wherein the diluted aqueous hydroxylamine solution is concentrated in a column, the vapor containing hydroxylamine is removed from the bottom of the column via a side-stream and highly pure hydroxylamine is obtained through condensation of the vapors. The inventive method is simple and mild, can be used in large-scale production and yields "electronic grade" hydroxylamine.

公开(公告)号：BRPI0611610A2

公开(公告)日：2011-02-22

申请号：BRPI0611610

申请日：2006-06-12

Applicant: BASF AG

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

IPC: C07C41/50 ,  C07C43/30

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：NZ563775A

公开(公告)日：2009-12-24

申请号：NZ56377506

申请日：2006-06-12

Applicant: BASF AG

Inventor： HASSE HANS ,  BLAGOV SERGEJ ,  STROEFER ECKHARD

IPC: C08G65/00

Abstract: A process for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) by reacting formaldehyde with methanol and subsequently working up the reaction mixture by distillation is disclosed, wherein the process comprises the steps of: (a) feeding aqueous formaldehyde solution and methanol into a reactor and reacting to give a mixture a comprising formaldehyde, water, methylene glycol (MG), polyoxymethylene glycols (MGn>1), methanol, hemiformals (HF), methylal (POMDMEn=1) and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); (b) feeding the reaction mixture a into a first distillation column and separating into a low boiler fraction b1 and a high boiler fraction b2 comprising formaldehyde, water, methanol, polyoxymethylene glycols, hemiformals and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); (c) feeding the high boiler fraction b2 into a second distillation column and separating into a low boiler fraction c1 comprising formaldehyde, water, methylene glycol, polyoxymethylene glycols, methanol, hemiformals, di-, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=2,3,4) and a high boiler fraction c2 comprising polyoxymethylene glycols, high-boiling hemiformals (HFn>1) and high-boiling polyoxymethylene glycol dimethyl ethers (POMDMEn>4); (d) feeding the low boiler fraction c1 and, if appropriate, one or more recycle streams composed of formaldehyde, water, methylene glycol and polyoxymethylene glycols into a third distillation column and separating into a low boiler fraction d1 comprising formaldehyde, water, methanol, polyoxymethylene glycols, hemiformals and dioxymethylene glycol dimethyl ether (POMDMEn=2), and a high boiler fraction d2 substantially consisting of formaldehyde, water, methylene glycol, polyoxymethylene glycols, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); (e) feeding the high boiler fraction d2 into a phase separation apparatus and separating into an aqueous phase e1 substantially consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols, and an organic phase e2 comprising tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); (f) feeding the organic phase e2 into a fourth distillation column and separating into a low boiler fraction f1 substantially consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols, and a high boiler fraction f2 substantially consisting of tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4).

公开(公告)号：CA2451482C

公开(公告)日：2009-12-01

申请号：CA2451482

申请日：2002-07-02

Applicant: BASF AG

Inventor： KERTH STEFFEN ,  WOSTBROCK KARL-HEINZ ,  WEBER MARKUS ,  STROEFER ECKHARD

IPC: C01B21/14

Abstract: The invention relates to a method for producing an aqueous hydroxylamine solution that is devoid of salt by reacting an aqueous solution of a hydroxylammonium salt with a base to obtain a mixture and by separating an aqueous hydroxylamine solution devoid of salt by distillation from said mixture. The method is characterised in that an aqueous solution of a mixtur e of NaOH and KOH with a molar ratio of Na+: K+ in the region of between 70: 3 0 and 95: 5 and a total concentration of Na+ and K+ in the region of between 0 .1 and 10 m/m % (in relation to the total quantity of the mixture) is used as t he base.

公开(公告)号：CA2681976A1

公开(公告)日：2008-10-09

申请号：CA2681976

申请日：2008-03-27

Applicant: BASF AG

Inventor： LANG NEVEN ,  STROEFER ECKHARD ,  SIEGERT MARKUS ,  HASSE HANS

IPC: C07D323/06

Abstract: The invention relates to a method for producing trioxane from trioxymethy lene glycol dimethyl ether (POMD- MEn=3) by reacting trioxymethylene glycol dimethyl ether in the presence of an acidic catalyst and subsequently proces sing the reaction mixture by distillation. The method comprises the followin g steps: a) feeding trioxymethylene glycol dimethyl ether (POMDMEn=3) or a m ixture containing trioxymethylene glycol dimethyl ether to a reactor and rea cting the substance in the presence of an acidic catalyst to give a mixture (a) containing trioxane, formaldehyde, water, methylene glycol (MG), polyoxy methylene glycols (MGn>1), methanol, hemiformals (HF), methylal (POMDMEn= 1) and polyoxymethylene glycol dimethyl ether (POMDMEn>1); b) separating the reaction mixture (a) by distillation to give a low-boiling fraction (b1) containing trioxane, formaldehyde, water, methylene glycol, methanol, hemif ormal (HFn=1), methylal and dioxymethylene glycol dimethyl ether (POMDMEn=2) and a high-boiling fraction (b2) containing polyoxymethylene glycols (MGn&g t;1), hemiformals (HFn>1) and polyoxymethylene glycol dimethyl ether (POM DMEn>2); c) separating the low-boiling fraction (b1) by distillation to g ive a low-boiling fraction (c1) containing formaldehyde, water, methylene gl ycol, methanol, hemiformal (HFn=1), methylal and dioxymethylene glycol dimet hyl ether (POMDMEn=2) and a high-boiling fraction (c2) containing trioxane.

公开(公告)号：DE502005002701D1

公开(公告)日：2008-03-13

申请号：DE502005002701

申请日：2005-10-20

Applicant: BASF AG

Inventor： SIEGERT MARKUS ,  LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN

IPC: C07D323/06

Abstract: Processes are disclosed comprising: (a) reacting an aqueous formaldehyde solution in a reactor in the presence of a suitable catalyst to obtain a reaction product mixture comprising trioxane, formaldehyde and water; (b) distilling the reaction product mixture to form a top stream comprising crude trioxane; and (c) treating the top stream in one or more additional stages to form pure trioxane; wherein an aqueous sidestream is drawn off during the distilling of the reaction mixture.

公开(公告)号：AT382600T

公开(公告)日：2008-01-15

申请号：AT04740321

申请日：2004-06-25

Applicant: BASF AG

Inventor： STEINBRENNER ULRICH ,  STROEFER ECKHARD ,  SOHN MARTIN ,  QUASCHNING VERONIKA ,  MOEHWALD HELMUT ,  THIELE KAI ,  DEBERDT FILIP ,  JACOBS JAN ,  PINKOS ROLF

IPC: C07C209/78 ,  C07C209/86 ,  C07C211/50

Abstract: A process is described for preparing diaminodiarylmethanes comprising the steps a) reacting an aromatic amine with a methylene-donating agent in the presence of homogeneous acid catalysts, b) removing the homogeneous acid catalyst from the reaction product, c) working up and purifying the reaction product, which comprises removing the homogeneous acid catalyst from the reaction mixture by adsorption to a solid adsorbent.