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公开(公告)号：WO03097630A8
公开(公告)日：2004-12-16
申请号：PCT/EP0304968
申请日：2003-05-13
Applicant: BASF AG , FRIESE KATRIN , RAULS MATTHIAS , FREYHOF REINHARD , FRIESE THORSTEN , ARMBRUSTER HARALD , ZEINER HARTMUT , EGBERS GITTA , STROEFER ECKHARD , HECK LUDWIG , HILDENBRAND PETER
Inventor： FRIESE KATRIN , RAULS MATTHIAS , FREYHOF REINHARD , FRIESE THORSTEN , ARMBRUSTER HARALD , ZEINER HARTMUT , EGBERS GITTA , STROEFER ECKHARD , HECK LUDWIG , HILDENBRAND PETER
IPC: C07D323/06
CPC classification number: C07D323/06
Abstract: 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.
Abstract translation: 一种用于通过在三聚酸性水溶液甲醛选自基本上由三恶烷，水和甲醛的混合物（三恶烷的粗产物）的组，其特征在于：a）三恶烷的粗产物从三聚制备三恶烷和随后除去三恶烷处理 蒸馏，b）将结晶化的三恶烷和c）从所述母液以及d分离）随后熔化和e）蒸馏除去其它副产物。
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公开(公告)号：GB2141129B
公开(公告)日：1986-06-18
申请号：GB8410227
申请日：1984-04-19
Applicant: BASF AG
Inventor： ZEINER HARTMUT , FISCHER JUERGEN
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公开(公告)号：GB2141129A
公开(公告)日：1984-12-12
申请号：GB8410227
申请日：1984-04-19
Applicant: BASF AG
Inventor： ZEINER HARTMUT , FISCHER JUERGEN
Abstract: Polyarylether-thioether-nitriles of the formula are prepared by a process in which 4,4'-thiodiphenol and 2,6- or 2,4-dichlorobenzonitrile are subjected to a polycondensation reaction in the presence of an anhydrous alkali metal carbonate.
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公开(公告)号：PT100576A
公开(公告)日：1993-07-30
申请号：PT10057692
申请日：1992-06-05
Applicant: BASF AG
Inventor： ZEINER HARTMUT , BETZ WALTER , KEE GRAHAM EDMUND MC
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公开(公告)号：CA2109706A1
公开(公告)日：1993-01-07
申请号：CA2109706
申请日：1992-06-11
Applicant: BASF AG
Inventor： ZEINER HARTMUT , BETZ WALTER , MCKEE GRAHAM E
Abstract: 2109706 9300393 PCTABS00019 Described is a method of treating the surface of moulded polyoxymethylene articles by treating with aqueous acids, the method being characterized in that mixtures of aqueous hydrochloric acid (strength at least 20 % by wt.) with mono- or diethers of an aliphatic polyhydroxy compound are used, the components of the mixture being in the ratio 90:10 to 10:90 % by vol.
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Patent Agency Ranking
公开(公告)号：DE10295499D2
公开(公告)日：2004-10-28
申请号：DE10295499
申请日：2002-11-28
Applicant: BASF AG
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公开(公告)号：AU2003232760A1
公开(公告)日：2003-12-02
申请号：AU2003232760
申请日：2003-05-13
Applicant: BASF AG
Inventor： FRIESE KATRIN , RAULS MATTHIAS , FREYHOF REINHARD , FRIESE THORSTEN , ARMBRUSTER HARALD , ZEINER HARTMUT , EGBERS GITTA , STROFER ECKHARD , HECK LUDWIG , HILDENBRAND PETER
IPC: C07D323/06
Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.
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公开(公告)号：DE10158813A1
公开(公告)日：2003-06-12
申请号：DE10158813
申请日：2001-11-30
Applicant: BASF AG
Inventor： STROEFER ECKHARD , ARMBRUSTER HARALD , EGBERS GITTA , FREYHOF REINHARD , FRIESE THORSTEN , HECK LUDWIG E , HILDENBRAND PETER , ZEINER HARTMUT , SCHOLL STEPHAN , GOERTZ HANS-HELMUT
Abstract: According to the invention, the production of oxymethylene homo- or co-polymers from an aqueous solution of formaldehyde and polyoxymethylene glycols is achieved, whereby 1) in a separation stage, water and formaldehyde are at least partly separated out from the aqueous solution, such that a phase containing polyoxymethylene glycols is obtained, in which the molar ratio of polyoxymethylene glycols to formaldehyde is greater than 1:0.6 and 2) the polyoxymethylene glycols obtained in stage 1) are reacted in the presence of polycondensation catalysts with abstraction of water to give oxymethylene homo- or co-polymers.
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公开(公告)号：DE59204859D1
公开(公告)日：1996-02-08
申请号：DE59204859
申请日：1992-06-11
Applicant: BASF AG
Inventor： ZEINER HARTMUT , BETZ WALTER , MC KEE GRAHAM
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公开(公告)号：AU2002356750A1
公开(公告)日：2003-06-10
申请号：AU2002356750
申请日：2002-11-28
Applicant: BASF AG
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