Process for preparing acrylic acid

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United States of America Patent

PATENT NO 10479751
APP PUB NO 20160257637A1
SERIAL NO

14915929

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Abstract

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The present invention provides an apparatus comprising a feed arranged below the middle of the apparatus, a quenching agent inlet arranged above the feed, an outlet arranged below the feed and a draw arranged above the quenching agent inlet, the apparatus having a region provided with one or more packing elements, wherein at least one means which ensures the formation of a liquid layer having a height of at least 1 cm is present between the quenching agent inlet and a packing element present between the quenching agent inlet and feed. The present invention also provides a process for preparing acrylic acid, which includes a step of oxidizing acrolein, wherein the reaction mixture obtained in this oxidation is contacted with water as quenching agent in an inventive apparatus, and a composition obtainable as bottom product in the process according to the invention, comprising acrylic acid and water.

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Patent Owner(s)

Patent OwnerAddress
EVONIK SUPERABSORBER GMBHRELLINGHAUSER STRASSE 1-11 ESSEN 45128

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bruhns, Arnd Borgholzhausen, DE 1 2
Elder, James Edward Friendswood, US 8 36
Kreis, Peter Dortmund, DE 10 37
Kuppinger, Franz-Felix Marl, DE 23 483
Meier, Ralf Dortmund, DE 22 131
Mosler, Jürgen Marl, DE 12 162
Psiorz, Christian Ratingen, DE 10 159
Rix, Armin Marl, DE 17 190
Schriewer, Raphael Laer, DE 1 2

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