DEVICE AND METHOD FOR PRODUCING ACRYLIC ACID WITH A REDUCED AUTOXIDATION TENDENCY
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United States of America Patent
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Issued Date -
Nov 12, 2009
app pub date -
Jul 20, 2007
filing date -
Jul 21, 2006
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Abandoned
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Abstract
The present invention relates to a device for the preparation of acrylic acid, comprising a first reactor and at least one further reactor, wherein at least the first reactor is a multi-tube reactor having a plurality of tubes comprising a catalyst which catalyses the synthesis of acrolein, wherein the tubes open into a collection chamber which can be fluidically connected to the at least one further reactor via an outflow region, wherein the outflow region comprises a laminarization means causing laminarization of a flow profile of a gas flowing through the outflow region. The invention also relates to a process for the preparation of acrylic acid, to an acrylic acid, to a process for the preparation of a hydrophilic polymer, to a hydrophilic polymer, to a method for the production of a water-absorbent hygiene article, to chemical products, and to the use of an acrylic acid.
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