Propylene glycol and ethylene glycol recovery from aqueous solution via reactive distillation

Dhale, Atul D.; Myrant, Laurie K.; Chopade, Shubham P.; Jackson, James E.; Miller, Dennis J.

doi:10.1016/j.ces.2004.02.018

Cited by 54 publications

(39 citation statements)

References 11 publications

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“…Broekhuis et al 21 reported the recovery of 1,2-propanediol from a dilute aqueous solution by cyclic acetalization with formaldehyde and acetaldehyde, the acetals obtained in the reaction were separated from the solution by distillation or extraction. Dhale et al 22 reported the recovery of 1,2-propanediol and ethylene glycerol from an aqueous solution via reactive distillation in which the reactions were also acetalization reactions. Malinowski 23,24 also studied reactive extraction for recovery of 1,3-PD from aqueous solution.…”

Section: 3-propanediol (13-pd) Is a Valuable Chemical Mainly Usedmentioning

confidence: 98%

“…In the study of the recovery of propylene glycerol and ethylene glycerol from aqueous solutions, Dhale et alpresented a method that first separated the mixture of acetals by distillation and then hydrolyzed each acetal to obtain pure alcohol. 22 We have adopted this method for the separation of 1,3-PD fermentation broth, and the study is currently being undertaken.…”

Section: Reactive Distillation Experimentsmentioning

confidence: 99%

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Downstream processing of 1,3‐propanediol fermentation broth

Hao

Liu

et al. 2005

J of Chemical Tech & Biotech

102

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The downstream processing of 1,3-propanediol fermentation broth using flocculation, reactive extraction, and reactive distillation was studied. Cellular debris and soluble protein in the broth were flocculated by combined use of chitosan and polyacrylamide at optimal concentrations of 150 ppm and 70 ppm, respectively; the soluble protein in the broth decreased to 0.06 g L −1 , and the recovery ratio of the supernatant liquor to broth was greater than 99%. 1,3-Propanediol and other alcohols were extracted from the supernatant liquor by reacting with butyraldehyde. In a four-stage countercurrent extraction with the volume ratio of the extraction solvent to the aqueous phase being 20:100, more than 99% 1,3-propanediol acetal (2-propyl-1,3-dioxane) and 2,3-butanediol acetal (2-propyl-4,5-dimethyl-1,3-dioxolane) were recovered from the aqueous phase; 35% of the glycerol acetals were recovered. The acetals produced were hydrolyzed in a reactive distillation column using the strongly acidic cation-exchange resin as catalyst, the bottom product obtained was a mixture of 1,3-propanediol (407 g L −1 ), 2,3-butanediol (252 g L −1 ), glycerol (277 g L −1 ), and glycerol acetals (146 g L −1 ).

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Section: 3-propanediol (13-pd) Is a Valuable Chemical Mainly Usedmentioning

confidence: 98%

Section: Reactive Distillation Experimentsmentioning

confidence: 99%

Downstream processing of 1,3‐propanediol fermentation broth

Hao

Liu

et al. 2005

J of Chemical Tech & Biotech

102

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“…In the case of glycols ethylene glycol (EG), propylene glycol (PG) or sorbitol traditional distillation is used so far as a purification step meaning that all the water present in the system must be evaporated. In reactive distillation, new intermediary compounds can be produced, with boiling points lower than water, thus avoiding the evaporation of all the water in the solution and then reducing the total energy consumption 179) . Cyclic acetals can be produced by reversible acetalization of glycols with aldehydes or ketones.…”

Section: Reactive Distillationmentioning

confidence: 99%

Biomass-derived Platform Molecules Upgrading through Catalytic Processes: Yielding Chemicals and Fuels

Dumeignil

Capron

Katryniok

et al. 2015

J. Jpn. Petrol. Inst.

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Biomass valorization is a booming field. Especially, the valorization of platform molecules by catalytic processes has driven a large interest in the recent years, and many groups are actively working on the transformation of biosourced substrates to a variety of upgraded chemicals. In this context, in the present paper we put in perspectives the scientific works of our research team. We first classified catalytic transformations of industrial interest according to the number of carbons of the starting material, from C1 to C6. They involve, among others, acid catalysts (e.g., for glycerol dehydration), redox catalysts (e.g., for 5-HMF conversion to diformylfuran), acid and redox catalysts (e.g., for direct acetalization of alcohols), or complex multifunctional catalysts, especially for the Guerbet reaction. Further, we also developed what we called 'toolboxes,' which are general concepts or technologies with a broader field of applications. For example, we adapted the two zones fluidized bed reactor (TZFBR) concept to the single reactor continuous regeneration of coking catalysts. Further, we designed a completely new high throughput platform enabling synthetizing, characterizing and testing the performances of many catalysts for considerably accelerating the catalysts discovery/optimization loop.

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“…PG is difficult and expensive to recover from aqueous solution because of its high boiling point and affinity with water. Reactive distillation was reported to be applied to PG purification [6]. In the reactive distillation column where an acid catalyst is present, PG reacts reversibly with acetaldehyde to form 2,4-dimethyl-1,3-dioxolane.…”

Section: Introductionmentioning

confidence: 99%

“…The use of heterogeneous ion-exchange resin catalysts offers many advantages over homogeneous acidic catalyst. Dhale et al studied the recovery of 1,2-propylene glycol from water via acetal formation using ionexchange resins as catalysts in reactive distillation [6]. Acid-catalyzed acetalization is used to obtain intermediates or final compounds.…”

Section: Introductionmentioning

confidence: 99%

The Nature of Acid-Catalyzed Acetalization Reaction of 1,2-Propylene Glycol and Acetaldehyde

Chen¹,

Chen²,

Li³

et al. 2015

Korean Chemical Engineering Research

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− We investigated catalytic activity of ion-exchange resins in acetalization of 1,2-propylene glycol with acetaldehyde. The impacts of reaction variables, such as temperature, reaction time, catalyst loading and feedstock composition, on the conversion of 1,2-propylene glycol were measured. The life of the catalyst was also studied. Furthermore, the reaction kinetics of 1,2-propylene glycol acetalization was studied. It was found that reaction rate followed the firstorder kinetics to acetaldehyde and 1,2-propylene glycol, respectively. Therefore, overall acetalization reaction should follow the second-order reaction kinetics, expressed as .

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Propylene glycol and ethylene glycol recovery from aqueous solution via reactive distillation

Cited by 54 publications

References 11 publications

Downstream processing of 1,3‐propanediol fermentation broth

Downstream processing of 1,3‐propanediol fermentation broth

Biomass-derived Platform Molecules Upgrading through Catalytic Processes: Yielding Chemicals and Fuels

The Nature of Acid-Catalyzed Acetalization Reaction of 1,2-Propylene Glycol and Acetaldehyde

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