METHOD FOR THE CONTINUOUS EXTRACTION OF (METH)ACRYLIC ACID

03-10-2002 дата публикации

Номер:

WO2002076917A1

Автор: Christoph Adami, Claus Hechler, Joachim Thiel, Jürgen Schröder, Otto Machhammer, Volker Diehl, Volker Schliephake, MACHHAMMER, Otto, ADAMI, Christoph, HECHLER, Claus, SCHRÖDER, Jürgen, SCHLIEPHAKE, Volker, THIEL, Joachim, DIEHL, Volker

Принадлежит: BASF AKTIENGESELLSCHAFT

Контакты:

Номер заявки: EP0203522

Дата заявки: 28-03-2002

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The invention relates to a method for the continuous extraction of (meth)acrylic acid from the reaction gas of catalytic gas phase oxidation. The inventive method comprises the following steps: (I) the reaction gas is quenched by evaporative cooling using a high-boiling solvent; (II) the (meth)acrylic acid is separated from the quenched reaction gas by absorption in the high-boiling solvent; (III) the solvent loaded with (meth)acrylic acid is split into a first partial flow (IIIA) mostly containing (meth)acrylic acid and a second partial flow (IIIB) mostly containing the solvent; (IV) flow (IIIB) is sent back to step (II); and (V) (meth)acrylic acid is extracted from flow (IIIA) by distillation, all remaining liquid flows produced in step (V) being sent back to step (I).

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CPC - классификация

B B0 B01 B01D B01D3 B01D3/B01D3/2 B01D3/22 B01D3/225 C C0 C07 C07C C07C5 C07C51 C07C51/C07C51/4 C07C51/44 C07C51/48

IPC - классификация

C C0 C07 C07C C07C5 C07C51 C07C51/C07C51/4 C07C51/44 C07C51/46 C07C51/48 C07C57 C07C57/C07C57/0 C07C57/05 C07C57/07

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