Fractionation of polyethylene wax by pilot-scale molecular distillation: new insights on process development

Maziero, Eluize Vayne; Salles, Rafael Budel; Tovar, Laura Plazas; Tanabe, Eduardo Hiromitsu; Bertuol, Daniel Assumpção

doi:10.1016/j.cherd.2019.09.041

Cited by 13 publications

(5 citation statements)

References 41 publications

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“…1, was used to study the separation of the VODD compounds. Maziero et al 20 . provide a detailed description of the equipment and its operation.…”

Section: Methodsmentioning

confidence: 99%

“…(1) Evaporator–condenser; (2) residue flask; (3) distillate flask; (4)–(6) heating circulators; (7) cooling water bath; (8) cold trap; (9) rotary vane pump; (10) diffusion pump; (11) vacuum gauge; (12) feed vessel. Adapted from Maziero et al 20 …”

Section: Methodsmentioning

confidence: 99%

“…1, was used to study the separation of the VODD compounds. Maziero et al 20 provide a detailed description of the equipment and its operation. The pilot plant was equipped with a vacuum system composed of two pumps arranged in series, achieving 0.1 Pa.…”

Section: Molecular Distillationmentioning

confidence: 99%

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Application of pilot‐scale molecular distillation for enrichment of phytonutrients from a novel deodorizer distillate of the margarine and shortenings industry

Maziero,

Moro,

Ballus

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDA wiped‐film molecular distillation (WFMD) pilot plant was used to evaluate process conditions for enriching phytonutrients (PN) from a novel vegetable oil deodorizer distillate (VODD) of the margarine and shortenings industry. This byproduct results from the incorporation of new blends of vegetable oils, such as soybean and palm oil, making it of interest due to its distinct chemical composition and matrix, which differ from the deodorizer distillates studied previously. The significance of the present investigation is related to the properties of the oil blend, requiring the establishment of new process conditions for this specific VODD. Experimental design was used to evaluate the WFMD process variables, with the aim of removing free fatty acids (FFA) and enabling eight PN to be concentrated in the reprocessing stages.RESULTSThe product obtained after three WFMD stages presented a 5‐fold increase in the total PN concentration, compared to the raw material. Notably, the procedure provided enrichment ratios (Er) of 7.2‐fold for total tocopherols (TPt, including α, β, λ, and δ tocopherols), 4.5‐fold for total phytosterols (PSt, including campesterol, stigmasterol, and β‐sitosterol), and 1.2‐fold for squalene (SQ), together with a deacidification efficiency (De) of 78.93%.CONCLUSIONThe proposed process provided significant concentration gains for all eight PN evaluated, resulting in a value‐added product. These excellent results were achieved using only three WFMD stages, without any need for additional processing steps. The data obtained at the pilot scale provide valuable insights for predicting the scalability of the process and facilitating potential industrial implementation.This article is protected by copyright. All rights reserved.

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“…1, was used to study the separation of the VODD compounds. Maziero et al 20 . provide a detailed description of the equipment and its operation.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Application of pilot‐scale molecular distillation for enrichment of phytonutrients from a novel deodorizer distillate of the margarine and shortenings industry

Maziero,

Moro,

Ballus

et al. 2023

J of Chemical Tech & Biotech

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“…Molecular distillation was performed using a pilot falling film molecular distiller (UIC GmbH Germany, Model KD 6, Germany) with 0.06 m 2 of evaporation surface and roller wiper basket at 380 rpm). Additional information about the equipment is detailed in the work of Maziero et al [ 36 ] PFAD and esterified PFAD were distilled following the conditions reported by Posada et al [ 16 ] and the equipment manufacturer's recommendations: 130°C evaporator temperature, 60°C condenser temperature, 70°C feed temperature, and 15 mL/min flow rate.…”

Section: Methodsmentioning

confidence: 99%

Esterification effect on the recovery of vitamin E from palm oil refining residues by molecular distillation

da Silva,

Maziero,

Ballus

et al. 2023

Can J Chem Eng

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Waste edible oils are an alternative source of high‐value natural compounds. Vitamin E can be recovered from palm oil refining residues by molecular distillation. However, the presence of other lipophilic molecules compromises the selective separation of vitamin E. Esterification of the free fatty acids can enhance the selective separation of vitamin E by molecular distillation, but the conditions for carrying out the reaction need to be investigated to simultaneously ensure the conversion of free fatty acids and the reduction of vitamin E losses. Thus, this study investigated the effect of the esterification of the industrial waste on the recovery of vitamin E by molecular distillation. Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and analysis for fats and oils preconized by the American Oil Chemists' Society (AOCS) were used in the characterization of the industrial waste. Determination of the best condition to carry out the reaction was obtained by a central composite rotational design (CCRD) using the response surface methodology (RSM) and the desirability profile. The results showed that the best condition for the esterification was at 64°C, 213 min, 2 wt.% sulphuric acid, and a 10/1 methanol/free fatty acids molar ratio. This reaction condition achieved 97.9% conversion of free fatty acids and less than 3% of vitamin E loss. The esterification promoted concentration of vitamin E in the residue stream (145.4%) and reduction in the distillate stream (87.8%). Therefore, the obtained results presented a suitable route to obtaining vitamin E concentrate and adding value to an industrial residue.

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“…Currently, molecular distillation is considered advantageous, in regard to purifying high molecular weight compounds without thermally degrading the products, such as rice bran wax unsaponifiable components [ 29 ]. One of the newest demanding applications of MD involves the fractionation of polyethylene wax, which, performed on a pilot scale, is reported to be a promising solution for recycling and recovery of high value-added products with narrower carbon numbers [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Molecular Distillation of Lavender Supercritical Extracts: Physicochemical and Antimicrobial Characterization of Feedstocks and Assessment of Distillates Enriched with Oxygenated Fragrance Components

et al. 2022

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Lavandula angustifolia is one of the most widely cultivated non-food crops used in the production of essential oil; it is used in perfumery, aromatherapy, pharmaceutical preparations, and food ingredients. In this study, supercritical fluid extraction (SFE) and molecular distillation (MD) were combined, primarily to enrich scCO2 extracts with lavender oxygenated monoterpenes, avoiding thermal degradation, hydrolysis, and solvent contamination, and maintaining the natural characteristics of the obtained oils. Molecular distillation was developed for the first time for the extraction of crucial lavender fragrance ingredients, i.e., from two scCO2 extracts obtained from dry flower stems of lavender cultivated in Poland and Bulgaria. The best results for high-quality distillates were obtained at 85 °C (EVT) and confirmed that linalyl acetate content increased from 51.54 mg/g (initial Bulgarian lavender extract, L-Bg-E) and 89.53 mg/g (initial Polish lavender extract, L-Pl-E) to 118.41 and 185.42 mg/g, respectively, corresponding to increases of 2.3 and 2.1 times in both distillate streams, respectively. The distillates, light oils, and extracts from lavender were also evaluated for their antimicrobial properties by determining the minimum inhibitory concentration (MIC) by the broth microdilution method. Generally, Gram-positive bacteria and Candida spp. were more sensitive to all distilled fractions and extracts than Escherichia coli (Gram-negative bacteria).

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Fractionation of polyethylene wax by pilot-scale molecular distillation: new insights on process development

Cited by 13 publications

References 41 publications

Application of pilot‐scale molecular distillation for enrichment of phytonutrients from a novel deodorizer distillate of the margarine and shortenings industry

Application of pilot‐scale molecular distillation for enrichment of phytonutrients from a novel deodorizer distillate of the margarine and shortenings industry

Esterification effect on the recovery of vitamin E from palm oil refining residues by molecular distillation

Molecular Distillation of Lavender Supercritical Extracts: Physicochemical and Antimicrobial Characterization of Feedstocks and Assessment of Distillates Enriched with Oxygenated Fragrance Components

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