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公开(公告)号：KR810001298B1
公开(公告)日：1981-10-13
申请号：KR780003648
申请日：1978-12-04
Applicant: STANDARD OIL CO
Inventor： WAGNER D
IPC: C07C57/04
Abstract: An aq. soln. obtained from the oxidn. of propylene comprising 55% acrylic acid, water, HOAc, and impurities were fed into the top of a first column, contacted countercurrently with diisopropyl ether, and the ext. contg. 19% acrylic acid and 1 % HOAc was removed at the top. The stream was passed to the 15th stage of a 19stage solvent recovery column, the bottom was reboiled to provide the heat for distn., and an overhead contg. solvent, water, HoAc was removed and condensed. A vapor stream from the 7th stage was passed to the bottom of a column, HOAc was removed. By removal of the HOAc in this manner, a bottom stream of 99.9% acrylic acid could be recovered
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公开(公告)号：BR7807252A
公开(公告)日：1979-08-14
申请号：BR7807252
申请日：1978-11-03
Applicant: STANDARD OIL CO
Inventor： WAGNER D
Abstract: A process for the recovery of acrylic acid from an aqueous solution resulting from the oxidation of propylene or acrolein, in which the acrylic acid, acetic acid and water are extracted with a solvent preferably one boiling below the boiling point of acrylic acid, the extract being distilled in a solvent recovery column to obtain an overhead stream of solvent and water, and a bottoms stream of acrylic acid characterised in that a vapour stream is removed from below the feed tray of the solvent recovery column and the vapour stream is rectified to remove acetic acid.
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