METHOD FOR FRACTIONATING AMINE-CONTAINING MIXTURE

    公开(公告)号:JP2003210902A

    公开(公告)日:2003-07-29

    申请号:JP2002314496

    申请日:2002-10-29

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To provide a method for fractionating an amine-containing mixture. SOLUTION: According to circumstances, (i) a (first) low boiling point matter fraction is separated and removed from the amine-containing mixture by distillation, according to circumstances, (ii) a (first) high boiling point matter fraction is separated and removed from the amine-containing mixture by distillation, (iii) the amine-containing mixture is subjected to extraction using a sodium hydroxide solution to produce a sodium hydroxide-containing aqueous first phase and an amine-, (further) low boiling point matter- and, according to circumstances, (further) high boiling matter-containing water-organic second phase, (iv) the water-organic second phase is distilled to produce a substantially anhydrous amine as a column bottom phase taken-out substance or as a lateral flow extract in the stripping part of a distillation column, an amine/water azeotropic mixture as a lateral flow extract in the concentration part of the column and a (further) low boiling matter fraction as a column top extract and the amine/water azeotropic mixture is returned to the extraction process (iii) and, according to circumstances, (v) the substantially anhydrous amine is refined or fractionated. COPYRIGHT: (C)2003,JPO

    Method for Preparing 3(5)-Methylpyrazoles

    公开(公告)号:GEP20032955B

    公开(公告)日:2003-01-10

    申请号:GEAP1992001742

    申请日:1992-11-03

    Applicant: BASF AG

    Abstract: . Technical Result Simplification of technological process and increase in yield of product. 2. Essence Process for the preparation of 3(5)-methylpyrazoles of the general formula 1a and 1b wherein R-hydrogen, alkyl with 1-6 carbon atoms, non-substituted or substituted phenyl are interacting with hydrazine of the general formula (II) RHN-NH wherein R has the mentioned values or with hydrate thereof with diacetylene comprising flow, which is separated at production of acetylene obtained from cracked gas by absorption. 3. Field of Application Organic chemistry.

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