Invention Grant
- Patent Title: Cyclic process for producing taurine from monoethanolamine
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Application No.: US17015943Application Date: 2020-09-09
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Publication No.: US11578036B2Publication Date: 2023-02-14
- Inventor: Songzhou Hu
- Applicant: Vitaworks IP, LLC
- Applicant Address: US NJ North Brunswick
- Assignee: Vitaworks IP, LLC
- Current Assignee: Vitaworks IP, LLC
- Current Assignee Address: US NJ North Brunswick
- Agency: Myers Wolin, LLC
- Main IPC: C07C303/22
- IPC: C07C303/22 ; C07C215/08 ; C07C309/04 ; C07C303/44 ; C07C213/08 ; C07B63/00

Abstract:
There is disclosed a process for recovering monoethanolamine from an aqueous mother liquor solution comprising the steps of: (a) adding excess ammonia or alkali hydroxide and a solvent to the aqueous solution comprised of monoethanolamine sulfate and at least one component selected from the group of inorganic salts consisting of ammonium sulfate, ammonium sulfite, alkali sulfite, and alkali sulfate, to precipitate the inorganic salts, wherein the alkali is lithium, sodium, or potassium; (b) separating the inorganic salts by means of a solid-liquid separation to yield an aqueous solution comprised of the monoethanolamine; and (c) distilling the solvent to yield an aqueous solution comprised of the monoethanolamine and optionally purifying the MEA by distillation. The recovered MEA is recycled to produce taurine.
Public/Granted literature
- US20220073453A1 Cyclic Process for Producing Taurine from Monoethanolamine Public/Granted day:2022-03-10
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