Crystallization unit for acrylic acid and method for crystallization of acrylic acid using the same
US8846977B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2010 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Jun 24, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/43
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
PROBLEMAn object of the present invention is to provide a crystallization unit capable of producing a purified acrylic acid having high purity efficiently.SOLUTIONThe present invention provides a crystallization unit to separate an acrylic acid-containing solution into a mother liquid and a purified acrylic acid, wherein the crystallization unit comprises a crystallizer having an exit to take out the mother liquid and the purified acrylic acid alternately; a supply line to supply the acrylic acid-containing solution to the crystallizer; and a recovery line to recover the mother liquid and the purified acrylic acid alternately from the crystallizer which is connected to the exit, and wherein the recovery line is equipped with an opening and closing unit consisting of a ball valve or a gate valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.