Invention Grant
- Patent Title: Sodium chloride production process
- Patent Title (中): 氯化钠生产工艺
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Application No.: US13055185Application Date: 2009-05-22
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Publication No.: US08771380B2Publication Date: 2014-07-08
- Inventor: Hendrikus Wilhelmus Bakkenes , Johannes Albertus Maria Meijer , Allert Schokker
- Applicant: Hendrikus Wilhelmus Bakkenes , Johannes Albertus Maria Meijer , Allert Schokker
- Applicant Address: NL Arnhem
- Assignee: Akzo Nobel N.V.
- Current Assignee: Akzo Nobel N.V.
- Current Assignee Address: NL Arnhem
- Agency: Kenyon & Kenyon LLP
- Priority: EP08160910 20080722
- International Application: PCT/EP2009/056472 WO 20090522
- International Announcement: WO2010/009933 WO 20100128
- Main IPC: C01D3/24
- IPC: C01D3/24

Abstract:
The present invention pertains to a process for producing sodium chloride comprising the steps of (i) preparing a brine comprising at least 150 g/l of sodium chloride by dissolving a sodium chloride source in water, (ii) subjecting the resulting brine to a eutectic freeze crystallization step by indirect cooling of said brine, resulting in the formation of ice, sodium chloride dihydrate, and a mother liquor, (iii) separating the sodium chloride dihydrate formed in step (ii) from the ice and optionally mother liquor at the eutectic temperature, such that a sodium chloride dihydrate-rich stream is formed, and (iv) feeding said sodium chloride dihydrate-rich stream to a recrystallizer to form sodium chloride and a mother liquor.
Public/Granted literature
- US20110129409A1 SODIUM CHLORIDE PRODUCTION PROCESS Public/Granted day:2011-06-02
Information query
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