Patent ID: 6348638
Filing Date: 2002-02-19
Classification: C07C,F23D

Abstract:
A process for the disposal of secondary components, said secondary components being formed during preparation of (meth)acrylic acid, said process comprising:(1) combusting a gaseous low-boiling secondary component in a combustion stage; and (2) feeding an aqueous solution of a low- or medium-boiling secondary component to said combustion stage, wherein said low-boiling secondary component possesses a lower boiling point than (meth)acrylic acid and said medium-boiling secondary component possesses approximately the same boiling point as (meth)acrylic acid, and wherein said preparation of (meth)acrylic acid comprises: (a) catalytically oxidizing propene, isobutene, acrolein, methacrolein, or a mixture thereof in a gas phase; (b) absorbing a reaction product that is formed in step (a) in a solvent, to obtain a loaded solvent; and (c) separating acrylic acid or methacrylic acid from said loaded solvent of step (b) by extraction or distillation or both.