Invention Grant
- Patent Title: Process of separation of glyoxylic acid from an aqueous reaction medium containing glyoxylic acid and hydrochloric acid
- Patent Title (中): 从含有乙醛酸和盐酸的水性反应介质中分离出乙醛酸的工艺
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Application No.: US12864412Application Date: 2009-01-21
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Publication No.: US08481783B2Publication Date: 2013-07-09
- Inventor: Olivier Simon
- Applicant: Olivier Simon
- Applicant Address: FR Nanterre
- Assignee: Clariant Speciality Fine Chemicals (France)
- Current Assignee: Clariant Speciality Fine Chemicals (France)
- Current Assignee Address: FR Nanterre
- Agent Tod A. Waldrop
- Priority: FR0850469 20080125
- International Application: PCT/EP2009/050663 WO 20090121
- International Announcement: WO2009/092736 WO 20090730
- Main IPC: C07C51/44
- IPC: C07C51/44 ; C07C59/153
Abstract:
The invention relates to a process for separating glyoxylic acid starting from an aqueous reaction medium containing glyoxylic acid and hydrochloric acid, comprising a step of countercurrent steam stripping of the reaction medium in order to obtain, on the one hand, a gas phase containing the volatile hydrochloric acid and, on the other hand, a liquid phase containing the purified glyoxylic acid.
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