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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：MY116119A
公开(公告)日：2003-11-28
申请号：MYPI19972788
申请日：1997-06-20
Applicant: BASF AG
Inventor： HAMMON ULRICH DR , RAUH ULRICH , SCHLIEPHAKE VOLKER DR , PIES WOLFGANG DR
Abstract: IN A PROCESS FOR THE DISPOSAL OF LOW, MEDIUM, AND HIGH-BOILING SECONDARY COMPONENTS (1,2,3) FORMED DURING THE PREPARATION OF (METH) ACRYLIC ACID THE GASEOUS LOW BOILING SECONDARY COMPONENTS (2) ARE BURNED, WHILST LOW-BOILING AND MEDIUM-BOILING SECONDARY COMPONENTS (2) THAT ARE DISSOLVED IN WATER OPTIONALLY TOGETHER WITH HIGH-BOILING SECONDARY COMPONENTS (3) TREATED WITH SOLVENT ARE ADDED. (FIGURE 1)
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公开(公告)号：DE19624674A1
公开(公告)日：1998-01-02
申请号：DE19624674
申请日：1996-06-20
Applicant: BASF AG
Inventor： SCHLIEPHAKE VOLKER DR , HAMMON ULRICH DR , PIES WOLFGANG DR , RAUH ULRICH
Abstract: In a method for removing low, medium and high-boiling by-products obtained when producing acrylic acids or methacrylic acids, the gaseous low-boiling by-products are burned, whereby low and medium-boiling by-products hat have been dissolved in water, if desired together with high-boiling by-products that have been treated with the dissolvent, are taken to the burning stage.
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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：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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Patent Agency Ranking
公开(公告)号：DK0765854T3
公开(公告)日：2002-06-17
申请号：DK96115457
申请日：1996-09-26
Applicant: BASF AG
Inventor： HAMMON ULRICH DR , SCHLIEPHAKE VOLKER DR , PIES WOLFGANG DR , RAUH ULRICH
Abstract: A process for the rectification and sepn. of unsatd. carboxylic acids (I) from the solvents in which (I) are absorbed after the synthesis reaction. The process involves interrupting the rectification and flushing out the rectification column with basic soln.
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公开(公告)号：DE19536179A1
公开(公告)日：1997-04-03
申请号：DE19536179
申请日：1995-09-28
Applicant: BASF AG
Inventor： HAMMON ULRICH DR , SCHLIEPHAKE VOLKER DR , PIES WOLFGANG DR , RAUH ULRICH
Abstract: A process for the rectification and sepn. of unsatd. carboxylic acids (I) from the solvents in which (I) are absorbed after the synthesis reaction. The process involves interrupting the rectification and flushing out the rectification column with basic soln.
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公开(公告)号：MY116551A
公开(公告)日：2004-02-28
申请号：MYPI9603485
申请日：1996-08-23
Applicant: BASF AG
Inventor： HAMMON ULRICH DR , RAUH ULRICH DR , SCHLIEPHAKE VOLKER DR , PIES WOLFGANG DR
Abstract: IN A PROCESS FOR THE SEPARATION BY RECTIFICATION OF UNSATURATED CARBOXYLIC ACIDS FROM SOLVENTS IN WHICH THE ACIDS WERE ABSORBED AFTER THE SYNTHESIS REACTION, THE RECTIFICATION IS BRIEFLY INTERRUPTED AND THE RECTIFICATION COLUMN IS FLUSHED WITH A BASIC SOLUTION. THE INTERRUPTION IS CARRIED OUT AT REGULAR TIME INTERVALS. THE BASIC SOLUTION USED IS AN AQUEOUS SOLUTION OF ALKALI METAL AND/OR ALKALINE EARTH METAL HYDROXIDE, PREFERABLY NAOH, KOH, CA(OH)2 OR THEIR ANHYDROUS OXIDES; A1KA1INE POLAR ORGANIC SOLVENTS AS AMINES OR AMIDES CAN BE USED, TOO.
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公开(公告)号：ES2175004T3
公开(公告)日：2002-11-16
申请号：ES96115457
申请日：1996-09-26
Applicant: BASF AG
Inventor： HAMMON ULRICH DR , SCHLIEPHAKE VOLKER DR , PIES WOLFGANG DR , RAUH ULRICH
Abstract: A process for the rectification and sepn. of unsatd. carboxylic acids (I) from the solvents in which (I) are absorbed after the synthesis reaction. The process involves interrupting the rectification and flushing out the rectification column with basic soln.
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公开(公告)号：CZ9804221A3
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
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