Production of partially refined waste glycerol
AssigneeReg Life Sciences, LLC
InventorsMyong K. KO, Perry Y. Liao, Simon Li, Fernando A. Sanchez-Riera
Life of this patent
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Abstract
The disclosure relates to a novel glycerol purification process that produces partially refined waste glycerol for a variety of industrial applications. The disclosure encompasses a salt-containing partially refined glycerol composition that is suitable as a fermentation grade glycerol.
Claims55
A process of producing partially refined waste glycerol by refining crude glycerol containing organic impurities, said process comprising:
- deoiling using a hydrophobic solvent to extract organic impurities;
- dewatering by drying at an elevated temperature;
- and
- desalting using a polar solvent to precipitate salt.
A process of producing partially refined waste glycerol by refining crude glycerol containing organic impurities, said process comprising:
- subjecting crude glycerol to a hydrophobic solvent to produce a mixture of crude glycerol and hydrophobic solvent;
- and
- separating the mixture of crude glycerol and hydrophobic solvent to produce a deoiled (DO) glycerol and a phase containing hydrophobic solvent and organic impurities.
A partially refined waste glycerol derived from the processing of natural fats and oils, wherein said partially refined waste glycerol comprises reduced salt and organic impurities as compared to a crude glycerol.
A process of producing partially refined waste glycerol by refining crude glycerol containing organic impurities, said process comprising:
- drying crude glycerol to produce a dewatered glycerol;
- subjecting the dewarered glycerol to a hydrophobic solvent to produce a mixture of dewatered glycerol and hydrophobic solvent;
- and
- separating the mixture of dewatered glycerol and hydrophobic solvent to produce a deoiled dewatered (DOW) glycerol and a phase containing hydrophobic solvent and organic impurities.
A process of producing partially refined waste glycerol by refining crude glycerol containing organic impurities, said process comprising:
- drying crude glycerol to produce a dewatered glycerol;
- subjecting a polar solvent to said dewatered glycerol to produce a mixture of polar solvent and dewatered glycerol and precipitating a salt from the mixture of polar solvent and dewatered glycerol;
- and
- separating the mixture of polar solvent and dewatered glycerol into a light phase containing a dewatered and desalted glycerol and the polar solvent and a heavy phase containing the salt.
A process of producing partially refined waste glycerol by refining crude glycerol containing organic impurities, said process comprising:
- subjecting a polar solvent to crude glycerol to produce a mixture of polar solvent and crude glycerol and precipitating a salt from the mixture of polar solvent and crude glycerol;
- and
- separating the mixture of polar solvent and crude glycerol into a light phase containing desalted glycerol and the polar solvent and a heavy phase containing the salt.
A process of refining crude glycerol, comprising:
- combining crude glycerol with a hydrophobic solvent to remove organic impurities and produce a deoiled (DO) glycerol;
- drying said DO glycerol to produce a deoiled and dewatered (DOW) glycerol;
- and
- subjecting a polar solvent to said DOW glycerol to precipitate salt and produce a deoiled, dewatered and desalted (DOWS) glycerol.
A process of producing partially refined waste glycerol by refining crude glycerol containing organic impurities, said process comprising:
- subjecting crude glycerol to a hydrophobic solvent to produce a mixture of crude glycerol and hydrophobic solvent;
- separating the mixture of crude glycerol and hydrophobic solvent to produce a deoiled (DO) glycerol and a phase containing hydrophobic solvent and organic impurities;
- drying said DO glycerol to produce a deoiled and dewatered (DOW) glycerol;
- subjecting a polar solvent to said DOW glycerol to produce a mixture of polar solvent and DOW glycerol and precipitating a salt from the mixture of polar solvent and DOW glycerol;
- and
- separating the mixture of polar solvent and DOW glycerol into a light phase containing a deoiled, dewatered and desalted (DOWS) glycerol and the polar solvent and a heavy phase containing the salt.
The process of claim 51, wherein said evaporating comprises flash evaporation.
A process of refining crude glycerol, comprising:
- combining crude glycerol with a hydrophobic solvent to remove organic impurities and create a deoiled (DO) glycerol;
- drying said DO glycerol to create a deoiled and dewatered (DOW) glycerol;
- partially evaporating about 75 percent of said DOW glycerol as a glycerol distillate without salt;
- recovering a remaining portion of said DOW glycerol in an evaporation discharge bottom;
- and
- adding a polar solvent to said evaporation discharge bottom to precipitate salt and create a deoiled, dewatered and desalted (DOWS) glycerol.
Dependencies are inferred from the claim text.