METHOD OF EXTRACTING METHACRYLIC ACID FROM LIQUID PHASE CONTAINING ACRYLIC ACID AS MAIN COMPONENT AND DESIRED PRODUCT, AS WELL AS METHACRYLIC ACID AS SECONDARY COMPONENT Russian patent published in 2011 - IPC C07C51/43 C07C51/64 B01D9/02 C07C57/05 C07C51/58

Abstract RU 2430906 C2

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of separating acrylic acid and methacrylic acid in case of a liquid phase P containing acrylic and methacrylic acid, where content of acrylic acid is at least 50 wt % and where said liquid phase contains acrylic acid and methacrylic acid in molar ratio V from 3:2 to 100000:1, wherein separation is carried out via crystallisation, where acrylic acid is concentrated in the formed crystallised product while methacrylic acid is concentrated in the obtained residual melt.

EFFECT: method enables efficient separation of acrylic acid from methacrylic acid.

6 cl, 1 ex

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RU 2 430 906 C2

Authors

Khajlek Jorg

Mjuller-Ehngel' Klaus Joakhim

Adami Kristof

Diterle Martin

Dates

2011-10-10—Published

2006-03-01—Filed