Purifier for removing hydrogen fluoride from electrolytic solution
AssigneeEntegris, Inc.
InventorsYutaka Shimada, Yasushi Ohyashiki
Life of this patent
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Abstract
The present invention is a purification system for removing hydrogen fluoride and water from an electrolytic solution for lithium-ion secondary batteries in which [1] a purifier for removing hydrogen fluoride containing a hydrogen fluoride adsorbent selected from among carbonate hydrotalcites and calcined hydrotalcites and [2] a purifier for removing water containing an adsorbent for trapping water are connected in this order from upstream to downstream.
Claims9
A purification system for removing hydrogen fluoride and water from a non-aqueous electrolytic solution for a lithium ion secondary battery, comprising:
- a purifier for removing hydrogen fluoride containing an adsorbent selected from carbonate hydrotalcites or calcined hydrotalcites;
- and
- a purifier for removing water connected downstream from the purifier for removing hydrogen fluoride, the purifier for removing water containing a water adsorbent,
- each purifier comprising a housing, an electrolytic solution inlet member, an electrolytic solution outlet member and mesh for preventing outflow of the adsorbent at the inlet and outlet of the housing,
- wherein the non-aqueous electrolytic solution flows into the purifier for removing hydrogen fluoride via the electrolytic solution inlet member of the purifier for removing hydrogen fluoride, whereby the non-aqueous electrolytic solution is supplied to the adsorbent selected from carbonate hydrotalcites or calcined hydrotalcites;
- out of the purifier for removing hydrogen fluoride via the electrolytic solution outlet member of the purifier for removing hydrogen fluoride;
- into the purifier for removing water via the electrolytic solution inlet member of the purifier for removing water, whereby the non-aqueous electrolytic solution is supplied to the water adsorbent;
- and out of the purifier for removing water via the electrolytic solution outlet member of the purifier for removing water.
A purification system for removing hydrogen fluoride and water from a non-aqueous electrolytic solution for a lithium ion secondary battery, comprising:
- a preliminary purifier for removing water containing an adsorbent for trapping water;
- a purifier for removing hydrogen fluoride connected downstream from the preliminary purifier, the purifier for removing hydrogen fluoride containing an adsorbent selected from carbonate hydrotalcites or calcined hydrotalcites;
- and
- a purifier for removing water connected downstream from the purifier for removing hydrogen fluoride, the purifier for removing water containing a water adsorbent,
- each purifier comprising a housing, an electrolytic solution inlet member, an electrolytic solution outlet member and mesh for preventing outflow of the adsorbent at the inlet and outlet of the housing,
- wherein the non-aqueous electrolytic solution flows into the preliminary purifier via the electrolytic solution inlet member of the preliminary purifier, whereby the non-aqueous electrolytic solution is supplied to the adsorbent for trapping water;
- out of the preliminary purifier via the electrolytic solution outlet member of the preliminary purifier;
- into the purifier for removing hydrogen fluoride via the electrolytic solution inlet member of the purifier for removing hydrogen fluoride, whereby the non-aqueous electrolytic solution is supplied to the adsorbent selected from carbonate hydrotalcites or calcined hydrotalcites;
- out of the purifier for removing hydrogen fluoride via the electrolytic solution outlet member of the purifier for removing hydrogen fluoride;
- into the purifier for removing water via the electrolytic solution inlet member of the purifier for removing water, whereby the non-aqueous electrolytic solution is supplied to the water adsorbent;
- and out of the purifier for removing water via the electrolytic solution outlet member of the purifier for removing water.
Dependencies are inferred from the claim text.