Method of recovering (meth)acrylic acid
US10350539B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Dec 5, 2017 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | Dec 5, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2257/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method of recovering (meth)acrylic acid and an apparatus used for the recovery method. The recovery method according to the present invention discharges each (meth)acrylic acid aqueous solution of different concentrations at a (meth)acrylic acid absorption tower, and uses an extraction solvent of a specific ratio in the step of extracting (meth)acrylic acid, thus enabling the operation of a continuous process of recovering (meth)acrylic acid that can secure a high (meth)acrylic acid recovery rate, and can simultaneously significantly reduce purification energy cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.