US2022266216A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022266216-A1 |
| Application number | US-202217741768-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 11, 2022 |
| Priority date | Nov 13, 2019 |
| Publication date | Aug 25, 2022 |
| Grant date | — |
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A lactic acid adsorbent includes at least one of a layered double hydroxide that contains multiple metal hydroxide layers and also contains anions and water molecules held between the metal hydroxide layers, or a layered double oxide that is an oxide of a layered double hydroxide. The metal hydroxide layers contain divalent metal ions M2+ and trivalent metal ions M3+, mole ratio (M2+/M3+) of the divalent metal ions M2+ to the trivalent metal ions M3+ in a layered double hydroxide is 1.9 to 3.6, and the mole ratio in a layered double oxide is 1.8 to 3.6.
Opening claim text (preview).
What is claimed is: 1 . A lactic acid adsorbent including at least one of a layered double hydroxide that contains a plurality of metal hydroxide layers and also contains anions and water molecules held between the metal hydroxide layers, or a layered double oxide that is an oxide of the layered double hydroxide, the metal hydroxide layers containing divalent metal ions M 2+ and trivalent metal ions M 3+ , mole ratio (M 2+ /M 3+ ) of the divalent metal ions M 2+ to the trivalent metal ions M 3+ in the layered double hydroxide being 1.9 to 3.6, the mole ratio in the layered double oxide being 1.8 to 3.6, and the lactic acid adsorbent being brought into contact with a solution that contains lactic acid and glucose and adsorbing lactic acid in the solution. 2 . The lactic acid adsorbent according to claim 1 , wherein the divalent metal ions M 2+ are Mg 2+ or Ca 2+ . 3 . The lactic acid adsorbent according to claim 1 , wherein the solution is a culture solution for cells or microorganisms. 4 . A method for removing lactic acid, the method comprising bringing the lactic acid adsorbent according to claim 1 into contact with lactic acid.
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