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公开(公告)号：JPH10309457A
公开(公告)日：1998-11-24
申请号：JP11332098
申请日：1998-04-23
Applicant: BASF AG
Inventor： SCHLIEPHAKE VOLKER DR , HAMMON ULRICH DR , RAUH ULRICH , SCHRAUT ARMIN DR
Abstract: PROBLEM TO BE SOLVED: To provide a reactor apparatus and a method for treating fluid material in which temperature is measured in the representative conditions in the tubular reactors. SOLUTION: The reactor apparatus comprises both a tubular reactor equipped with a temperature measuring unit and a tubular reactor unequipped with the temperature measuring unit. The tubular reactors are set up so that the mass of solid particles to be introduced is directly proportional to the free cross-sectional area of the respective tubular reactors and flow resistance or pressure drop in the tubular reactors, and accordingly average rectilinear velocity are identical when gas flow rate being proportional to the free cross-sectional area is conducted. Concretely, the above- mentioned pressure drop is adjusted by fines fraction of the solid particles in accordance with the following formula. mfines =mtot (Pm -PI)/(P2 -P1 ) (in formula, mfines denotes mass of fines fraction. mtot denotes total mass of solid particle and fines fraction. Pm denotes average pressure drop in tubular reactor unequipped with temperature measuring unit. P1 denotes pressure drop in tubular reactor equipped with temperature measuring unit in the case of filling solid particles. P2 denotes pressure drop in tubular reactor which is equipped with temperature measuring unit and is filled with fines fraction).
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公开(公告)号：JP2001151704A
公开(公告)日：2001-06-05
申请号：JP2000290685
申请日：2000-09-25
Applicant: BASF AG
Inventor： SUTORIS HEINZ FRIEDRICH , WAGENBLAST GERHARD , SCHLIEPHAKE VOLKER DR , SCHROEDER JUERGEN DR , KELLER HARALD , NESTLER GERHARD
IPC: C09K15/14 , C07B63/04 , C07C51/50 , C07C57/075 , C09K15/24
Abstract: PROBLEM TO BE SOLVED: To provide a phosphorus-free polymerization inhibitor composition. SOLUTION: This phosphorus-free polymerization inhibitor composition contains (a) at least one N-oxyl radical and (b) a compound of the general formula (X) [(n) is an integer of 0 to 3; and R is a 1 to 4C alkyl, a 2 to 4C alkenyl or a 7 to 10C aralkyl].
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公开(公告)号：JP2001081461A
公开(公告)日：2001-03-27
申请号：JP2000246074
申请日：2000-08-14
Applicant: BASF AG
Inventor： SUTORIS HEINZ FRIEDRICH DR , WAGENBLAST GERHARD , SCHLIEPHAKE VOLKER DR , SCHROEDER JUERGEN DR , KELLER HARALD , JAWOREK THOMAS
IPC: C09K15/08 , C07B63/04 , C07C7/20 , C07C51/50 , C07C67/62 , C09K15/02 , C09K15/04 , C09K15/20 , C09K15/24 , C09K15/30 , C09K15/32
Abstract: PROBLEM TO BE SOLVED: To provide an inhibitor composition that can be used to stabilize a free-radical polymerizable compound. SOLUTION: The inhibitor composition comprises (a) at least cone nitroxyl group (derivative), (b) at least one phenol (derivative) and (c) at least one compound having at least one phosphorus atom whose oxidation state is +3. Example: (a) 4-hydroxy-1-oxyl-2,2,6,6-tetramethylpiperidine; (b) H3PO3, and (c) hydroquinone monomethyl ether.
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公开(公告)号：CZ292498B6
公开(公告)日：2003-10-15
申请号：CZ273596
申请日：1996-09-18
Applicant: BASF AG
Inventor： HAMMON ULRICH DR , SCHLIEPHAKE VOLKER DR , PIES WOLFGANG DR , RAUH ULRICH
Abstract: The present method for cleaning a rectification column in which unsaturated acids have been separated by rectification from solvents in which these acids were absorbed after the synthesis reaction, the rectification is briefly interrupted and the rectification column is flushed with an aqueous solution of potassium hydroxide or an aqueous solution of sodium hydroxide in order to separate polymeric sediments. The interruption is preferably carried out at regular time intervals, whereby an alkali metal or an alkaline earth metal neutral salt can be added in the sodium or potassium hydroxide aqueous solution.
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公开(公告)号：DE19752199A1
公开(公告)日：1999-05-27
申请号：DE19752199
申请日：1997-11-25
Applicant: BASF AG
IPC: B01D5/00 , C07C45/81 , C07C51/42 , C07C57/07 , C07D301/32 , C07B63/00 , C07C47/127 , C07C47/22 , C07C209/86 , C07C211/46 , C07D303/04
Abstract: The temperature difference between gas and condenser surface is reduced, compared with present practice, to less than 20 deg C. At least 10 000 condensation nuclei/cm in the condenser for effective condensation is carried out. The gas mixture should have a Lewis factor between 0.9 and 1.5. Components which are required to be separated are water vapor and an organic vapor, which could be the principal product or a byproduct. Cooling is generally carried out in at least two stages over heat exchange surfaces that could be dry or covered by a water film. The body of the specification, supported by the drawings, contains detailed examples of condensation processes in which data from the inventive and the present methods are compared.
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Patent Agency Ranking
公开(公告)号：CZ422198A3
公开(公告)日：1999-04-14
申请号：CZ422198
申请日：1997-06-19
Applicant: BASF AG
Inventor： SCHLIEPHAKE VOLKER DR , HAMMON ULRICH DR , PIES WOLFGANG DR , RAUTH ULRICH
Abstract: In a process for the disposal of low, mediun, and high-boiling secondary components formed during the preparation of (meth)acrylic acid the gaseous low-boiling secondary components are burned, whilst low-boiling and medium-boiling secondary components that are dissolved in water optionally together with high-boiling secondary components treated with solvent are added.
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公开(公告)号：DE19740252A1
公开(公告)日：1999-03-18
申请号：DE19740252
申请日：1997-09-12
Applicant: BASF AG
Inventor： ECK BERND , MACHHAMMER OTTO DR , PROLL THEO DR , SCHLIEPHAKE VOLKER DR , THIEL JOACHIM DR , BROELLOS KLAUS DR
Abstract: Acrylic and methacrylic acid can be synthesized by catalytic gas phase oxidation of 3-4C alkanes, alkenes, alcohols and/or aldehydes. This process for the production of acrylic acid or methacrylic acid comprises: (A) production of a gaseous product mixture comprising the reaction mixture arising from the (B) condensation of the gaseous product mixture (C) crystallization of acrylic acid or methacrylic acid from the resulting solution. (D) separation of the crystals from the mother liquor and (E) recycling of at least a portion of the mother liquor from (D) to (B).
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公开(公告)号：MY150402A
公开(公告)日：2014-01-15
申请号：MYPI20044952
申请日：2000-06-07
Applicant: BASF AG
Inventor： ECK BERND , HEILEK JÖRG , BAUMANN DIETER , SCHLIEPHAKE VOLKER DR
Abstract: ACRYLIC ACID OR METHACRYLIC ACID IS PURIFIED BY CRYSTALLIZATION TO OBTAIN CRYSTALS AND A MOTHER LIQUOR, BY A PROCESS IN WHICH THE CRYSTALS ARE WASHED WITH A WASH LIQUID CONTAINING THE ACID AND HAVING A TEMPERATURE FROM 15 TO 40ºC. FURTHERMORE, A PROCESS FOR THE PREPARATION OF ACRYLIC ACID OR METHACRYLIC ACID COMPRISES THE ABOVE MENTIONED PURIFICATION PROCESS.
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公开(公告)号：CZ9602735A3
公开(公告)日：1998-05-13
申请号：CZ273596
申请日：1996-09-18
Applicant: BASF AG
Inventor： HAMMON ULRICH DR , SCHLIEPHAKE VOLKER DR , PIES WOLFGANG DR , RAUH ULRICH
CPC classification number: C07C51/44 , Y10S203/22
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公开(公告)号：DE19627847A1
公开(公告)日：1998-01-15
申请号：DE19627847
申请日：1996-07-10
Applicant: BASF AG
Inventor： ECK BERND , MACHHAMMER OTTO DR , PROLL THEO DR , SCHLIEPHAKE VOLKER DR
Abstract: Disclosed is a method of preparing acrylic acid or methacrylic acid by: (a) preparing a gaseous product mixture having essentially the composition of a reaction mixture of catalytic gas-phase oxidation of C3/C4 alkanes, alkenes, alkanols and/or alkanals and/or precursors thereof to form acrylic acid or methacrylic acid, characterized by (b) condensation of the product mixture, (c) crystallization of the acrylic acid or methacrylic acid from the solution obtained in stage (b), and (d) extraction of the resulting crystals from the mother liquor.
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