1, 3-BUTYLENE GLYCOL PRODUCT
Provided is a method capable of yielding high-purity 1,3-butylene glycol having a very low content of a high boiling point component and a low dry point, with a high recovery ratio. A method for producing 1,3-butylene glycol to yield purified 1,3-butylene glycol from a reaction crude liquid containing 1,3-butylene glycol,in which, in a high boiling point component removal column for use in the removing a high boiling point component, a charged liquid containing 1,3-butylene glycol is distilled under conditions that (i) a reflux ratio is greater than 0.02 in a case where a concentration of 1,3-butylene glycol in the charged liquid is 95% or less, or a reflux ratio is greater than 0.01 in a case where the concentration of 1,3-butylene glycol in the charged liquid is greater than 95%, and (ii) a bottom ratio of less than 30 wt.%, high-purity 1,3-butylene glycol is distilled off from above a charging plate, and a liquid in which a high boiling point component is concentrated is extracted from below the charging plate..
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Patent| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Europäisches Patentamt - (2024) vom: 13. März Zur Gesamtaufnahme - year:2024 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
MARUO KATSUYA [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| Anmerkungen: |
Source: www.epo.org (no modifications made), First posted: 2024-03-13, Last update posted on www.tib.eu: 2024-04-02, Last updated: 2024-04-09 |
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| Patentnummer: |
EP4083010 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
EPA001214950 |
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| 520 | |a Provided is a method capable of yielding high-purity 1,3-butylene glycol having a very low content of a high boiling point component and a low dry point, with a high recovery ratio. A method for producing 1,3-butylene glycol to yield purified 1,3-butylene glycol from a reaction crude liquid containing 1,3-butylene glycol,in which, in a high boiling point component removal column for use in the removing a high boiling point component, a charged liquid containing 1,3-butylene glycol is distilled under conditions that (i) a reflux ratio is greater than 0.02 in a case where a concentration of 1,3-butylene glycol in the charged liquid is 95% or less, or a reflux ratio is greater than 0.01 in a case where the concentration of 1,3-butylene glycol in the charged liquid is greater than 95%, and (ii) a bottom ratio of less than 30 wt.%, high-purity 1,3-butylene glycol is distilled off from above a charging plate, and a liquid in which a high boiling point component is concentrated is extracted from below the charging plate. | ||
| 650 | 4 | |a A61K: Preparations for medical, dental, or toilet purposes (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms a61j0003000000;chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles a61l; soap compositions c11d) | |
| 650 | 4 | |a che | |
| 650 | 4 | |a B01D: Separation (separating solids from solids by wet methods b03b, b03d, by pneumatic jigs or tables b03b, by other dry methods b07;magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields b03c;centrifuges b04b; vortex apparatus b04c;presses per se for squeezing-out liquid from liquid-containing material b30b0009020000) | |
| 650 | 4 | |a cet | |
| 650 | 4 | |a A61Q: Specific use of cosmetics or similar toilet preparations | |
| 650 | 4 | |a C07C: Acyclic or carbocyclic compounds (macromolecular compounds c08;production of organic compounds by electrolysis or electrophoresis c25b0003000000, c25b0007000000) | |
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